Merging upstream version 1.29.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

33 files changed, 336 insertions, 4828 deletions

diff --git a/backends/Makefile.in b/backends/Makefile.in
deleted file mode 100644
index b5865ef1..00000000
--- a/backends/Makefile.in
+++ /dev/null
@@ -1,715 +0,0 @@
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diff --git a/backends/README.md b/backends/README.md
index 47054477..8d53fd66 100644
--- a/backends/README.md
+++ b/backends/README.md
@@ -1,5 +1,12 @@
+<!--
+title: "Metrics long term archiving"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/README.md
+-->
+
 # Metrics long term archiving
 
+> ⚠️ The backends system is now deprecated in favor of the [exporting engine](/exporting/README.md).
+
 Netdata supports backends for archiving the metrics, or providing long term dashboards, using Grafana or other tools,
 like this:
 
@@ -29,7 +36,8 @@ So, although Netdata collects metrics every second, it can send to the backend s
 
         metrics are sent to a document db, `JSON` formatted.
 
-    -   **prometheus** is described at [prometheus page](prometheus/) since it pulls data from Netdata.
+    -   **prometheus** is described at [prometheus page](/backends/prometheus/README.md) since it pulls data from
+        Netdata.
 
     -   **prometheus remote write** (a binary snappy-compressed protocol buffer encoding over HTTP used by
         **Elasticsearch**, **Gnocchi**, **Graphite**, **InfluxDB**, **Kafka**, **OpenTSDB**, **PostgreSQL/TimescaleDB**,
@@ -37,10 +45,10 @@ So, although Netdata collects metrics every second, it can send to the backend s
         providers](https://prometheus.io/docs/operating/integrations/#remote-endpoints-and-storage))
 
         metrics are labeled in the format, which is used by Netdata for the [plaintext prometheus
-        protocol](prometheus/). Notes on using the remote write backend are [here](prometheus/remote_write/).
+        protocol](/backends/prometheus/README.md). Notes on using the remote write backend are [here](/backends/prometheus/remote_write/README.md).
 
-    -   ****TimescaleDB** via [community-built connector](TIMESCALE.md) that takes JSON streams from a Netdata client
-        and writes them to a TimescaleDB table.
+    -   **TimescaleDB** via [community-built connector](/backends/TIMESCALE.md) that takes JSON streams from a Netdata
+        client and writes them to a TimescaleDB table.
 
     -   **AWS Kinesis Data Streams**
 
@@ -136,14 +144,14 @@ from your Netdata):
    When multiple servers are defined, Netdata will try the next one when the first one fails. This allows you to
    load-balance different servers: give your backend servers in different order on each Netdata.
 
-   Netdata also ships [`nc-backend.sh`](nc-backend.sh), a script that can be used as a fallback backend to save the
+   Netdata also ships `nc-backend.sh`, a script that can be used as a fallback backend to save the
    metrics to disk and push them to the time-series database when it becomes available again. It can also be used to
    monitor / trace / debug the metrics Netdata generates.
 
    For kinesis backend `destination` should be set to an AWS region (for example, `us-east-1`).
 
    The MongoDB backend doesn't use the `destination` option for its configuration. It uses the `mongodb.conf`
-   [configuration file](../backends/mongodb/) instead.
+   [configuration file](/backends/mongodb/README.md) instead.
 
 -   `data source = as collected`, or `data source = average`, or `data source = sum`, selects the kind of data that will
      be sent to the backend.
@@ -168,8 +176,8 @@ from your Netdata):
      of times within each pattern). The patterns are checked against the hostname (the localhost is always checked as
      `localhost`), allowing us to filter which hosts will be sent to the backend when this Netdata is a central Netdata
      aggregating multiple hosts. A pattern starting with `!` gives a negative match. So to match all hosts named `*db*`
-     except hosts containing `*slave*`, use `!*slave* *db*` (so, the order is important: the first pattern matching the
-     hostname will be used - positive or negative).
+     except hosts containing `*child*`, use `!*child* *db*` (so, the order is important: the first pattern
+     matching the hostname will be used - positive or negative).
 
 -   `send charts matching = *` includes one or more space separated patterns, using `*` as wildcard (any number of times
      within each pattern). The patterns are checked against both chart id and chart name. A pattern starting with `!`
@@ -183,9 +191,14 @@ from your Netdata):
      are different: disks with device-mapper, interrupts, QoS classes, statsd synthetic charts, etc.
 
 -   `host tags = list of TAG=VALUE` defines tags that should be appended on all metrics for the given host. These are
-     currently only sent to opentsdb and prometheus. Please use the appropriate format for each time-series db. For
-     example opentsdb likes them like `TAG1=VALUE1 TAG2=VALUE2`, but prometheus like `tag1="value1",tag2="value2"`. Host
-     tags are mirrored with database replication (streaming of metrics between Netdata servers).
+     currently only sent to graphite, json, opentsdb and prometheus. Please use the appropriate format for each
+     time-series db. For example opentsdb likes them like `TAG1=VALUE1 TAG2=VALUE2`, but prometheus like `tag1="value1",
+     tag2="value2"`. Host tags are mirrored with database replication (streaming of metrics between Netdata servers).
+
+     Starting from Netdata v1.20 the host tags are parsed in accordance with a configured backend type and stored as
+     host labels so that they can be reused in API responses and exporting connectors. The parsing is supported for
+     graphite, json, opentsdb, and prometheus (default) backend types. You can check how the host tags were parsed using
+     the /api/v1/info API call.
 
 ## monitoring operation
 
@@ -210,8 +223,6 @@ Netdata provides 5 charts:
 
 ## alarms
 
-The latest version of the alarms configuration for monitoring the backend is [here](../health/health.d/backend.conf)
-
 Netdata adds 4 alarms:
 
 1.  `backend_last_buffering`, number of seconds since the last successful buffering of backend data
diff --git a/backends/TIMESCALE.md b/backends/TIMESCALE.md
new file mode 100644
index 00000000..05a3c3b4
--- /dev/null
+++ b/backends/TIMESCALE.md
@@ -0,0 +1,57 @@
+<!--
+title: "Writing metrics to TimescaleDB"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/TIMESCALE.md
+-->
+
+# Writing metrics to TimescaleDB
+
+Thanks to Netdata's community of developers and system administrators, and Mahlon Smith
+([GitHub](https://github.com/mahlonsmith)/[Website](http://www.martini.nu/)) in particular, Netdata now supports
+archiving metrics directly to TimescaleDB.
+
+What's TimescaleDB? Here's how their team defines the project on their [GitHub page](https://github.com/timescale/timescaledb):
+
+> TimescaleDB is an open-source database designed to make SQL scalable for time-series data. It is engineered up from
+> PostgreSQL, providing automatic partitioning across time and space (partitioning key), as well as full SQL support.
+
+## Quickstart
+
+To get started archiving metrics to TimescaleDB right away, check out Mahlon's [`netdata-timescale-relay`
+repository](https://github.com/mahlonsmith/netdata-timescale-relay) on GitHub. 
+
+This small program takes JSON streams from a Netdata client and writes them to a PostgreSQL (aka TimescaleDB) table.
+You'll run this program in parallel with Netdata, and after a short [configuration
+process](https://github.com/mahlonsmith/netdata-timescale-relay#configuration), your metrics should start populating
+TimescaleDB.
+
+Finally, another member of Netdata's community has built a project that quickly launches Netdata, TimescaleDB, and
+Grafana in easy-to-manage Docker containers. Rune Juhl Jacobsen's
+[project](https://github.com/runejuhl/grafana-timescaledb) uses a `Makefile` to create everything, which makes it
+perfect for testing and experimentation.
+
+## Netdata&#8596;TimescaleDB in action
+
+Aside from creating incredible contributions to Netdata, Mahlon works at [LAIKA](https://www.laika.com/), an
+Oregon-based animation studio that's helped create acclaimed films like _Coraline_ and _Kubo and the Two Strings_.
+
+As part of his work to maintain the company's infrastructure of render farms, workstations, and virtual machines, he's
+using Netdata, `netdata-timescale-relay`, and TimescaleDB to store Netdata metrics alongside other data from other
+sources.
+
+> LAIKA is a long-time PostgreSQL user and added TimescaleDB to their infrastructure in 2018 to help manage and store
+> their IT metrics and time-series data. So far, the tool has been in production at LAIKA for over a year and helps them
+> with their use case of time-based logging, where they record over 8 million metrics an hour for netdata content alone.
+
+By archiving Netdata metrics to a backend like TimescaleDB, LAIKA can consolidate metrics data from distributed machines
+efficiently. Mahlon can then correlate Netdata metrics with other sources directly in TimescaleDB.
+
+And, because LAIKA will soon be storing years worth of Netdata metrics data in TimescaleDB, they can analyze long-term
+metrics as their films move from concept to final cut.
+
+Read the full blog post from LAIKA at the [TimescaleDB
+blog](https://blog.timescale.com/blog/writing-it-metrics-from-netdata-to-timescaledb/amp/).
+
+Thank you to Mahlon, Rune, TimescaleDB, and the members of the Netdata community that requested and then built this
+backend connection between Netdata and TimescaleDB!
+
+[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fbackends%2FTIMESCALE&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/backends/WALKTHROUGH.md b/backends/WALKTHROUGH.md
index c6461db4..76dd62f8 100644
--- a/backends/WALKTHROUGH.md
+++ b/backends/WALKTHROUGH.md
@@ -1,3 +1,8 @@
+<!--
+title: "Netdata, Prometheus, Grafana stack"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/WALKTHROUGH.md
+-->
+
 # Netdata, Prometheus, Grafana stack
 
 ## Intro
@@ -57,9 +62,9 @@ command to run (/bin/bash) and then chooses the base container images (centos:la
 sitting inside the shell of the container.
 
 After we have entered the shell we can install Netdata. This process could not be easier. If you take a look at [this
-link](../packaging/installer/#installation), the Netdata devs give us several one-liners to install Netdata. I have not
-had any issues with these one liners and their bootstrapping scripts so far (If you guys run into anything do share).
-Run the following command in your container.
+link](../packaging/installer/README.md), the Netdata devs give us several one-liners to install Netdata. I have not had
+any issues with these one liners and their bootstrapping scripts so far (If you guys run into anything do share). Run
+the following command in your container.
 
 ```sh
 bash <(curl -Ss https://my-netdata.io/kickstart.sh) --dont-wait
diff --git a/backends/aws_kinesis/Makefile.in b/backends/aws_kinesis/Makefile.in
deleted file mode 100644
index abd7601a..00000000
--- a/backends/aws_kinesis/Makefile.in
+++ /dev/null
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diff --git a/backends/aws_kinesis/README.md b/backends/aws_kinesis/README.md
index 051ac963..a2b68251 100644
--- a/backends/aws_kinesis/README.md
+++ b/backends/aws_kinesis/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "Using Netdata with AWS Kinesis Data Streams"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/aws_kinesis/README.md
+-->
+
 # Using Netdata with AWS Kinesis Data Streams
 
 ## Prerequisites
diff --git a/backends/aws_kinesis/aws_kinesis_put_record.cc b/backends/aws_kinesis/aws_kinesis_put_record.cc
index 0c8ece68..a8ba4aac 100644
--- a/backends/aws_kinesis/aws_kinesis_put_record.cc
+++ b/backends/aws_kinesis/aws_kinesis_put_record.cc
@@ -10,18 +10,18 @@
 
 using namespace Aws;
 
-SDKOptions options;
+static SDKOptions options;
 
-Kinesis::KinesisClient *client;
+static Kinesis::KinesisClient *client;
 
 struct request_outcome {
     Kinesis::Model::PutRecordOutcomeCallable future_outcome;
     size_t data_len;
 };
 
-Vector<request_outcome> request_outcomes;
+static Vector<request_outcome> request_outcomes;
 
-void kinesis_init(const char *region, const char *access_key_id, const char *secret_key, const long timeout) {
+void backends_kinesis_init(const char *region, const char *access_key_id, const char *secret_key, const long timeout) {
     InitAPI(options);
 
     Client::ClientConfiguration config;
@@ -37,13 +37,13 @@ void kinesis_init(const char *region, const char *access_key_id, const char *sec
     }
 }
 
-void kinesis_shutdown() {
+void backends_kinesis_shutdown() {
     Delete(client);
 
     ShutdownAPI(options);
 }
 
-int kinesis_put_record(const char *stream_name, const char *partition_key,
+int backends_kinesis_put_record(const char *stream_name, const char *partition_key,
                        const char *data, size_t data_len) {
     Kinesis::Model::PutRecordRequest request;
 
@@ -56,7 +56,7 @@ int kinesis_put_record(const char *stream_name, const char *partition_key,
     return 0;
 }
 
-int kinesis_get_result(char *error_message, size_t *sent_bytes, size_t *lost_bytes) {
+int backends_kinesis_get_result(char *error_message, size_t *sent_bytes, size_t *lost_bytes) {
     Kinesis::Model::PutRecordOutcome outcome;
     *sent_bytes = 0;
     *lost_bytes = 0;
diff --git a/backends/aws_kinesis/aws_kinesis_put_record.h b/backends/aws_kinesis/aws_kinesis_put_record.h
index f48e420f..fa3d0345 100644
--- a/backends/aws_kinesis/aws_kinesis_put_record.h
+++ b/backends/aws_kinesis/aws_kinesis_put_record.h
@@ -9,14 +9,14 @@
 extern "C" {
 #endif
 
-void kinesis_init(const char *region, const char *access_key_id, const char *secret_key, const long timeout);
+void backends_kinesis_init(const char *region, const char *access_key_id, const char *secret_key, const long timeout);
 
-void kinesis_shutdown();
+void backends_kinesis_shutdown();
 
-int kinesis_put_record(const char *stream_name, const char *partition_key,
+int backends_kinesis_put_record(const char *stream_name, const char *partition_key,
                        const char *data, size_t data_len);
 
-int kinesis_get_result(char *error_message, size_t *sent_bytes, size_t *lost_bytes);
+int backends_kinesis_get_result(char *error_message, size_t *sent_bytes, size_t *lost_bytes);
 
 #ifdef __cplusplus
 }
diff --git a/backends/backends.c b/backends/backends.c
index 120c6e70..6bf583e1 100644
--- a/backends/backends.c
+++ b/backends/backends.c
@@ -28,6 +28,7 @@
 const char *global_backend_prefix = "netdata";
 int global_backend_update_every = 10;
 BACKEND_OPTIONS global_backend_options = BACKEND_SOURCE_DATA_AVERAGE | BACKEND_OPTION_SEND_NAMES;
+const char *global_backend_source = NULL;
 
 // ----------------------------------------------------------------------------
 // helper functions for backends
@@ -269,9 +270,9 @@ void backend_set_kinesis_variables(int *default_port,
 #if HAVE_KINESIS
     *brc = process_json_response;
     if (BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_json_plaintext;
+        *brf = backends_format_dimension_collected_json_plaintext;
     else
-        *brf = format_dimension_stored_json_plaintext;
+        *brf = backends_format_dimension_stored_json_plaintext;
 #endif
 }
 
@@ -295,7 +296,7 @@ void backend_set_prometheus_variables(int *default_port,
 #endif
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
-    *brc = process_prometheus_remote_write_response;
+    *brc = backends_process_prometheus_remote_write_response;
 #endif /* ENABLE_PROMETHEUS_REMOTE_WRITE */
 }
 
@@ -321,9 +322,9 @@ void backend_set_mongodb_variables(int *default_port,
 #if HAVE_MONGOC
     *brc = process_json_response;
     if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_json_plaintext;
+        *brf = backends_format_dimension_collected_json_plaintext;
     else
-        *brf = format_dimension_stored_json_plaintext;
+        *brf = backends_format_dimension_stored_json_plaintext;
 #endif
 }
 
@@ -344,9 +345,9 @@ void backend_set_json_variables(int *default_port,
     *brc = process_json_response;
 
     if (BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_json_plaintext;
+        *brf = backends_format_dimension_collected_json_plaintext;
     else
-        *brf = format_dimension_stored_json_plaintext;
+        *brf = backends_format_dimension_stored_json_plaintext;
 }
 
 /**
@@ -366,9 +367,9 @@ void backend_set_opentsdb_http_variables(int *default_port,
     *brc = process_opentsdb_response;
 
     if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_opentsdb_http;
+        *brf = backends_format_dimension_collected_opentsdb_http;
     else
-        *brf = format_dimension_stored_opentsdb_http;
+        *brf = backends_format_dimension_stored_opentsdb_http;
 
 }
 
@@ -389,9 +390,9 @@ void backend_set_opentsdb_telnet_variables(int *default_port,
     *brc = process_opentsdb_response;
 
     if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_opentsdb_telnet;
+        *brf = backends_format_dimension_collected_opentsdb_telnet;
     else
-        *brf = format_dimension_stored_opentsdb_telnet;
+        *brf = backends_format_dimension_stored_opentsdb_telnet;
 }
 
 /**
@@ -411,9 +412,9 @@ void backend_set_graphite_variables(int *default_port,
     *brc = process_graphite_response;
 
     if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = format_dimension_collected_graphite_plaintext;
+        *brf = backends_format_dimension_collected_graphite_plaintext;
     else
-        *brf = format_dimension_stored_graphite_plaintext;
+        *brf = backends_format_dimension_stored_graphite_plaintext;
 }
 
 /**
@@ -439,7 +440,7 @@ BACKEND_TYPE backend_select_type(const char *type) {
         return BACKEND_TYPE_JSON;
     }
     else if (!strcmp(type, "prometheus_remote_write")) {
-        return  BACKEND_TYPE_PROMETEUS;
+        return  BACKEND_TYPE_PROMETHEUS_REMOTE_WRITE;
     }
     else if (!strcmp(type, "kinesis") || !strcmp(type, "kinesis:plaintext")) {
         return BACKEND_TYPE_KINESIS;
@@ -528,6 +529,7 @@ void *backends_main(void *ptr) {
     // and prepare for sending data to our backend
 
     global_backend_options = backend_parse_data_source(source, global_backend_options);
+    global_backend_source = source;
 
     if(timeoutms < 1) {
         error("BACKEND: invalid timeout %ld ms given. Assuming %d ms.", timeoutms, global_backend_update_every * 2 * 1000);
@@ -551,18 +553,18 @@ void *backends_main(void *ptr) {
         case BACKEND_TYPE_OPENTSDB_USING_HTTP: {
 #ifdef ENABLE_HTTPS
             if (!strcmp(type, "opentsdb:https")) {
-                security_start_ssl(NETDATA_SSL_CONTEXT_OPENTSDB);
+                security_start_ssl(NETDATA_SSL_CONTEXT_EXPORTING);
             }
 #endif
             backend_set_opentsdb_http_variables(&default_port,&backend_response_checker,&backend_request_formatter);
             break;
         }
-        case BACKEND_TYPE_PROMETEUS: {
+        case BACKEND_TYPE_PROMETHEUS_REMOTE_WRITE: {
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
             do_prometheus_remote_write = 1;
 
             http_request_header = buffer_create(1);
-            init_write_request();
+            backends_init_write_request();
 #else
             error("BACKEND: Prometheus remote write support isn't compiled");
 #endif // ENABLE_PROMETHEUS_REMOTE_WRITE
@@ -578,7 +580,7 @@ void *backends_main(void *ptr) {
                 goto cleanup;
             }
 
-            kinesis_init(destination, kinesis_auth_key_id, kinesis_secure_key, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
+            backends_kinesis_init(destination, kinesis_auth_key_id, kinesis_secure_key, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
 #else
             error("BACKEND: AWS Kinesis support isn't compiled");
 #endif // HAVE_KINESIS
@@ -596,7 +598,7 @@ void *backends_main(void *ptr) {
                 goto cleanup;
             }
 
-            if(likely(!mongodb_init(mongodb_uri, mongodb_database, mongodb_collection, mongodb_default_socket_timeout))) {
+            if(likely(!backends_mongodb_init(mongodb_uri, mongodb_database, mongodb_collection, mongodb_default_socket_timeout))) {
                 backend_set_mongodb_variables(&default_port, &backend_response_checker, &backend_request_formatter);
                 do_mongodb = 1;
             }
@@ -624,6 +626,9 @@ void *backends_main(void *ptr) {
         case BACKEND_TYPE_UNKNOWN: {
             break;
         }
+        default: {
+            break;
+        }
     }
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
@@ -694,6 +699,7 @@ void *backends_main(void *ptr) {
     // prepare the backend main loop
 
     info("BACKEND: configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, global_backend_update_every, hostname, global_backend_prefix);
+    send_statistics("BACKEND_START", "OK", type);
 
     usec_t step_ut = global_backend_update_every * USEC_PER_SEC;
     time_t after = now_realtime_sec();
@@ -721,7 +727,7 @@ void *backends_main(void *ptr) {
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
         if(do_prometheus_remote_write)
-            clear_write_request();
+            backends_clear_write_request();
 #endif
         rrd_rdlock();
         RRDHOST *host;
@@ -752,7 +758,7 @@ void *backends_main(void *ptr) {
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
             if(do_prometheus_remote_write) {
-                rrd_stats_remote_write_allmetrics_prometheus(
+                backends_rrd_stats_remote_write_allmetrics_prometheus(
                     host
                     , __hostname
                     , global_backend_prefix
@@ -857,18 +863,18 @@ void *backends_main(void *ptr) {
 
                 char error_message[ERROR_LINE_MAX + 1] = "";
 
-                debug(D_BACKEND, "BACKEND: kinesis_put_record(): dest = %s, id = %s, key = %s, stream = %s, partition_key = %s, \
+                debug(D_BACKEND, "BACKEND: backends_kinesis_put_record(): dest = %s, id = %s, key = %s, stream = %s, partition_key = %s, \
                       buffer = %zu, record = %zu", destination, kinesis_auth_key_id, kinesis_secure_key, kinesis_stream_name,
                       partition_key, buffer_len, record_len);
 
-                kinesis_put_record(kinesis_stream_name, partition_key, first_char, record_len);
+                backends_kinesis_put_record(kinesis_stream_name, partition_key, first_char, record_len);
 
                 sent += record_len;
                 chart_transmission_successes++;
 
                 size_t sent_bytes = 0, lost_bytes = 0;
 
-                if(unlikely(kinesis_get_result(error_message, &sent_bytes, &lost_bytes))) {
+                if(unlikely(backends_kinesis_get_result(error_message, &sent_bytes, &lost_bytes))) {
                     // oops! we couldn't send (all or some of the) data
                     error("BACKEND: %s", error_message);
                     error("BACKEND: failed to write data to database backend '%s'. Willing to write %zu bytes, wrote %zu bytes.",
@@ -907,10 +913,10 @@ void *backends_main(void *ptr) {
             while(sent < buffer_len) {
                 const char *first_char = buffer_tostring(b);
 
-                debug(D_BACKEND, "BACKEND: mongodb_insert(): uri = %s, database = %s, collection = %s, \
+                debug(D_BACKEND, "BACKEND: backends_mongodb_insert(): uri = %s, database = %s, collection = %s, \
                       buffer = %zu", mongodb_uri, mongodb_database, mongodb_collection, buffer_len);
 
-                if(likely(!mongodb_insert((char *)first_char, (size_t)chart_buffered_metrics))) {
+                if(likely(!backends_mongodb_insert((char *)first_char, (size_t)chart_buffered_metrics))) {
                     sent += buffer_len;
                     chart_transmission_successes++;
                     chart_receptions++;
@@ -997,9 +1003,9 @@ void *backends_main(void *ptr) {
                 sock = connect_to_one_of(destination, default_port, &timeout, &reconnects, NULL, 0);
 #ifdef ENABLE_HTTPS
                 if(sock != -1) {
-                    if(netdata_opentsdb_ctx) {
+                    if(netdata_exporting_ctx) {
                         if(!opentsdb_ssl.conn) {
-                            opentsdb_ssl.conn = SSL_new(netdata_opentsdb_ctx);
+                            opentsdb_ssl.conn = SSL_new(netdata_exporting_ctx);
                             if(!opentsdb_ssl.conn) {
                                 error("Failed to allocate SSL structure %d.", sock);
                                 opentsdb_ssl.flags = NETDATA_SSL_NO_HANDSHAKE;
@@ -1045,7 +1051,7 @@ void *backends_main(void *ptr) {
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
                 if(do_prometheus_remote_write) {
-                    size_t data_size = get_write_request_size();
+                    size_t data_size = backends_get_write_request_size();
 
                     if(unlikely(!data_size)) {
                         error("BACKEND: write request size is out of range");
@@ -1054,7 +1060,7 @@ void *backends_main(void *ptr) {
 
                     buffer_flush(b);
                     buffer_need_bytes(b, data_size);
-                    if(unlikely(pack_write_request(b->buffer, &data_size))) {
+                    if(unlikely(backends_pack_write_request(b->buffer, &data_size))) {
                         error("BACKEND: cannot pack write request");
                         continue;
                     }
@@ -1069,7 +1075,7 @@ void *backends_main(void *ptr) {
                                     "Content-Length: %zu\r\n"
                                     "Content-Type: application/x-www-form-urlencoded\r\n\r\n",
                                     remote_write_path,
-                                    hostname,
+                                    destination,
                                     data_size
                     );
 
@@ -1134,7 +1140,7 @@ void *backends_main(void *ptr) {
         if(do_prometheus_remote_write && failures) {
             (void) buffer_on_failures;
             failures = 0;
-            chart_lost_bytes = chart_buffered_bytes = get_write_request_size(); // estimated write request size
+            chart_lost_bytes = chart_buffered_bytes = backends_get_write_request_size(); // estimated write request size
             chart_data_lost_events++;
             chart_lost_metrics = chart_buffered_metrics;
         } else
@@ -1196,7 +1202,7 @@ void *backends_main(void *ptr) {
 cleanup:
 #if HAVE_KINESIS
     if(do_kinesis) {
-        kinesis_shutdown();
+        backends_kinesis_shutdown();
         freez(kinesis_auth_key_id);
         freez(kinesis_secure_key);
         freez(kinesis_stream_name);
@@ -1206,12 +1212,12 @@ cleanup:
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
     buffer_free(http_request_header);
     if(do_prometheus_remote_write)
-        protocol_buffers_shutdown();
+        backends_protocol_buffers_shutdown();
 #endif
 
 #if HAVE_MONGOC
     if(do_mongodb) {
-        mongodb_cleanup();
+        backends_mongodb_cleanup();
         freez(mongodb_uri);
         freez(mongodb_database);
         freez(mongodb_collection);
@@ -1225,7 +1231,7 @@ cleanup:
     buffer_free(response);
 
 #ifdef ENABLE_HTTPS
-    if(netdata_opentsdb_ctx) {
+    if(netdata_exporting_ctx) {
         if(opentsdb_ssl.conn) {
             SSL_free(opentsdb_ssl.conn);
         }
diff --git a/backends/backends.h b/backends/backends.h
index 9da04cce..2f4efd90 100644
--- a/backends/backends.h
+++ b/backends/backends.h
@@ -21,12 +21,12 @@ typedef enum backend_types {
     BACKEND_TYPE_OPENTSDB_USING_TELNET,     // Send data to OpenTSDB using telnet API
     BACKEND_TYPE_OPENTSDB_USING_HTTP,       // Send data to OpenTSDB using HTTP API
     BACKEND_TYPE_JSON,                      // Stores the data using JSON.
-    BACKEND_TYPE_PROMETEUS,                 // The user selected to use Prometheus backend
+    BACKEND_TYPE_PROMETHEUS_REMOTE_WRITE,   // The user selected to use Prometheus backend
     BACKEND_TYPE_KINESIS,                   // Send message to AWS Kinesis
-    BACKEND_TYPE_MONGODB                    // Send data to MongoDB collection
+    BACKEND_TYPE_MONGODB,                   // Send data to MongoDB collection
+    BACKEND_TYPE_NUM                        // Number of backend types
 } BACKEND_TYPE;
 
-
 typedef int (**backend_response_checker_t)(BUFFER *);
 typedef int (**backend_request_formatter_t)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, BACKEND_OPTIONS);
 
@@ -35,9 +35,11 @@ typedef int (**backend_request_formatter_t)(BUFFER *, const char *, RRDHOST *, c
 
 extern int global_backend_update_every;
 extern BACKEND_OPTIONS global_backend_options;
+extern const char *global_backend_source;
 extern const char *global_backend_prefix;
 
 extern void *backends_main(void *ptr);
+BACKEND_TYPE backend_select_type(const char *type);
 
 extern BACKEND_OPTIONS backend_parse_data_source(const char *source, BACKEND_OPTIONS backend_options);
 
diff --git a/backends/graphite/Makefile.in b/backends/graphite/Makefile.in
deleted file mode 100644
index c4949129..00000000
--- a/backends/graphite/Makefile.in
+++ /dev/null
@@ -1,512 +0,0 @@
-# Makefile.in generated by automake 1.15.1 from Makefile.am.
-# @configure_input@
-
-# Copyright (C) 1994-2017 Free Software Foundation, Inc.
-
-# This Makefile.in is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
-# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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-
-@SET_MAKE@
-
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-    true; \
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-    false; \
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-}
-am__make_running_with_option = \
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-  sane_makeflags=$$MAKEFLAGS; \
-  if $(am__is_gnu_make); then \
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-  test $$has_opt = yes
-am__make_dryrun = (target_option=n; $(am__make_running_with_option))
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-CONFIG_HEADER = $(top_builddir)/config.h
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-LIBCRYPTO_CFLAGS = @LIBCRYPTO_CFLAGS@
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-OPTIONAL_IPMIMONITORING_LIBS = @OPTIONAL_IPMIMONITORING_LIBS@
-OPTIONAL_JSONC_LIBS = @OPTIONAL_JSONC_LIBS@
-OPTIONAL_JUDY_LIBS = @OPTIONAL_JUDY_LIBS@
-OPTIONAL_KINESIS_CFLAGS = @OPTIONAL_KINESIS_CFLAGS@
-OPTIONAL_KINESIS_LIBS = @OPTIONAL_KINESIS_LIBS@
-OPTIONAL_LIBCAP_CFLAGS = @OPTIONAL_LIBCAP_CFLAGS@
-OPTIONAL_LIBCAP_LIBS = @OPTIONAL_LIBCAP_LIBS@
-OPTIONAL_LZ4_LIBS = @OPTIONAL_LZ4_LIBS@
-OPTIONAL_MATH_CFLAGS = @OPTIONAL_MATH_CFLAGS@
-OPTIONAL_MATH_LIBS = @OPTIONAL_MATH_LIBS@
-OPTIONAL_MONGOC_CFLAGS = @OPTIONAL_MONGOC_CFLAGS@
-OPTIONAL_MONGOC_LIBS = @OPTIONAL_MONGOC_LIBS@
-OPTIONAL_NFACCT_CFLAGS = @OPTIONAL_NFACCT_CFLAGS@
-OPTIONAL_NFACCT_LIBS = @OPTIONAL_NFACCT_LIBS@
-OPTIONAL_PROMETHEUS_REMOTE_WRITE_CFLAGS = @OPTIONAL_PROMETHEUS_REMOTE_WRITE_CFLAGS@
-OPTIONAL_PROMETHEUS_REMOTE_WRITE_LIBS = @OPTIONAL_PROMETHEUS_REMOTE_WRITE_LIBS@
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diff --git a/backends/graphite/graphite.c b/backends/graphite/graphite.c
index 80570389..f75a93a0 100644
--- a/backends/graphite/graphite.c
+++ b/backends/graphite/graphite.c
@@ -6,7 +6,7 @@
 // ----------------------------------------------------------------------------
 // graphite backend
 
-int format_dimension_collected_graphite_plaintext(
+int backends_format_dimension_collected_graphite_plaintext(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -42,7 +42,7 @@ int format_dimension_collected_graphite_plaintext(
     return 1;
 }
 
-int format_dimension_stored_graphite_plaintext(
+int backends_format_dimension_stored_graphite_plaintext(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/graphite/graphite.h b/backends/graphite/graphite.h
index b7b0930f..498a7fcd 100644
--- a/backends/graphite/graphite.h
+++ b/backends/graphite/graphite.h
@@ -6,7 +6,7 @@
 
 #include "backends/backends.h"
 
-extern int format_dimension_collected_graphite_plaintext(
+extern int backends_format_dimension_collected_graphite_plaintext(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -18,7 +18,7 @@ extern int format_dimension_collected_graphite_plaintext(
         , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
 );
 
-extern int format_dimension_stored_graphite_plaintext(
+extern int backends_format_dimension_stored_graphite_plaintext(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/json/Makefile.in b/backends/json/Makefile.in
deleted file mode 100644
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diff --git a/backends/json/json.c b/backends/json/json.c
index a53c0f14..0c7cc738 100644
--- a/backends/json/json.c
+++ b/backends/json/json.c
@@ -6,7 +6,7 @@
 // ----------------------------------------------------------------------------
 // json backend
 
-int format_dimension_collected_json_plaintext(
+int backends_format_dimension_collected_json_plaintext(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -74,7 +74,7 @@ int format_dimension_collected_json_plaintext(
     return 1;
 }
 
-int format_dimension_stored_json_plaintext(
+int backends_format_dimension_stored_json_plaintext(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/json/json.h b/backends/json/json.h
index 11015652..78ac3760 100644
--- a/backends/json/json.h
+++ b/backends/json/json.h
@@ -5,7 +5,7 @@
 
 #include "backends/backends.h"
 
-extern int format_dimension_collected_json_plaintext(
+extern int backends_format_dimension_collected_json_plaintext(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -17,7 +17,7 @@ extern int format_dimension_collected_json_plaintext(
         , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
 );
 
-extern int format_dimension_stored_json_plaintext(
+extern int backends_format_dimension_stored_json_plaintext(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/mongodb/Makefile.am b/backends/mongodb/Makefile.am
index 61b24baf..161784b8 100644
--- a/backends/mongodb/Makefile.am
+++ b/backends/mongodb/Makefile.am
@@ -6,7 +6,3 @@ MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
 dist_noinst_DATA = \
     README.md \
     $(NULL)
-
-dist_libconfig_DATA = \
-    mongodb.conf \
-    $(NULL)
diff --git a/backends/mongodb/Makefile.in b/backends/mongodb/Makefile.in
deleted file mode 100644
index 417dab0a..00000000
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+++ /dev/null
@@ -1,576 +0,0 @@
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diff --git a/backends/mongodb/README.md b/backends/mongodb/README.md
index 890afd17..7c7996e1 100644
--- a/backends/mongodb/README.md
+++ b/backends/mongodb/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "MongoDB backend"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/mongodb/README.md
+-->
+
 # MongoDB backend
 
 ## Prerequisites
diff --git a/backends/mongodb/mongodb.c b/backends/mongodb/mongodb.c
index f40d8fa5..d0527a72 100644
--- a/backends/mongodb/mongodb.c
+++ b/backends/mongodb/mongodb.c
@@ -6,10 +6,10 @@
 
 #define CONFIG_FILE_LINE_MAX ((CONFIG_MAX_NAME + CONFIG_MAX_VALUE + 1024) * 2)
 
-mongoc_client_t *mongodb_client;
-mongoc_collection_t *mongodb_collection;
+static mongoc_client_t *mongodb_client;
+static mongoc_collection_t *mongodb_collection;
 
-int mongodb_init(const char *uri_string,
+int backends_mongodb_init(const char *uri_string,
                  const char *database_string,
                  const char *collection_string,
                  int32_t default_socket_timeout) {
@@ -47,7 +47,7 @@ int mongodb_init(const char *uri_string,
     return 0;
 }
 
-void free_bson(bson_t **insert, size_t n_documents) {
+void backends_free_bson(bson_t **insert, size_t n_documents) {
     size_t i;
 
     for(i = 0; i < n_documents; i++)
@@ -56,7 +56,7 @@ void free_bson(bson_t **insert, size_t n_documents) {
     free(insert);
 }
 
-int mongodb_insert(char *data, size_t n_metrics) {
+int backends_mongodb_insert(char *data, size_t n_metrics) {
     bson_t **insert = calloc(n_metrics, sizeof(bson_t *));
     bson_error_t error;
     char *start = data, *end = data;
@@ -77,7 +77,7 @@ int mongodb_insert(char *data, size_t n_metrics) {
 
         if(unlikely(!insert[n_documents])) {
            error("BACKEND: %s", error.message);
-           free_bson(insert, n_documents);
+           backends_free_bson(insert, n_documents);
            return 1;
         }
 
@@ -88,16 +88,16 @@ int mongodb_insert(char *data, size_t n_metrics) {
 
     if(unlikely(!mongoc_collection_insert_many(mongodb_collection, (const bson_t **)insert, n_documents, NULL, NULL, &error))) {
        error("BACKEND: %s", error.message);
-       free_bson(insert, n_documents);
+       backends_free_bson(insert, n_documents);
        return 1;
     }
 
-    free_bson(insert, n_documents);
+    backends_free_bson(insert, n_documents);
 
     return 0;
 }
 
-void mongodb_cleanup() {
+void backends_mongodb_cleanup() {
     mongoc_collection_destroy(mongodb_collection);
     mongoc_client_destroy(mongodb_client);
     mongoc_cleanup();
diff --git a/backends/mongodb/mongodb.h b/backends/mongodb/mongodb.h
index ffb27690..cae9b093 100644
--- a/backends/mongodb/mongodb.h
+++ b/backends/mongodb/mongodb.h
@@ -5,11 +5,11 @@
 
 #include "backends/backends.h"
 
-extern int mongodb_init(const char *uri_string, const char *database_string, const char *collection_string, const int32_t socket_timeout);
+extern int backends_mongodb_init(const char *uri_string, const char *database_string, const char *collection_string, const int32_t socket_timeout);
 
-extern int mongodb_insert(char *data, size_t n_metrics);
+extern int backends_mongodb_insert(char *data, size_t n_metrics);
 
-extern void mongodb_cleanup();
+extern void backends_mongodb_cleanup();
 
 extern int read_mongodb_conf(const char *path, char **uri_p, char **database_p, char **collection_p);
 
diff --git a/backends/opentsdb/Makefile.in b/backends/opentsdb/Makefile.in
deleted file mode 100644
index 78308ae9..00000000
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+++ /dev/null
@@ -1,512 +0,0 @@
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diff --git a/backends/opentsdb/README.md b/backends/opentsdb/README.md
new file mode 100644
index 00000000..5ba7b12c
--- /dev/null
+++ b/backends/opentsdb/README.md
@@ -0,0 +1,38 @@
+<!--
+title: "OpenTSDB with HTTP"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/opentsdb/README.md
+-->
+
+# OpenTSDB with HTTP
+
+Netdata can easily communicate with OpenTSDB using HTTP API. To enable this channel, set the following options in your
+`netdata.conf`:
+
+```conf
+[backend]
+    type = opentsdb:http
+    destination = localhost:4242
+```
+
+In this example, OpenTSDB is running with its default port, which is `4242`. If you run OpenTSDB on a different port,
+change the `destination = localhost:4242` line accordingly.
+
+## HTTPS
+
+As of [v1.16.0](https://github.com/netdata/netdata/releases/tag/v1.16.0), Netdata can send metrics to OpenTSDB using
+TLS/SSL. Unfortunately, OpenTDSB does not support encrypted connections, so you will have to configure a reverse proxy
+to enable HTTPS communication between Netdata and OpenTSDB. You can set up a reverse proxy with
+[Nginx](/docs/Running-behind-nginx.md).
+
+After your proxy is configured, make the following changes to `netdata.conf`:
+
+```conf
+[backend]
+    type = opentsdb:https
+    destination = localhost:8082
+```
+
+In this example, we used the port `8082` for our reverse proxy. If your reverse proxy listens on a different port,
+change the `destination = localhost:8082` line accordingly.
+
+[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fbackends%2Fopentsdb%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)]()
diff --git a/backends/opentsdb/opentsdb.c b/backends/opentsdb/opentsdb.c
index 6ee559db..965b4c09 100644
--- a/backends/opentsdb/opentsdb.c
+++ b/backends/opentsdb/opentsdb.c
@@ -6,7 +6,7 @@
 // ----------------------------------------------------------------------------
 // opentsdb backend
 
-int format_dimension_collected_opentsdb_telnet(
+int backends_format_dimension_collected_opentsdb_telnet(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -42,7 +42,7 @@ int format_dimension_collected_opentsdb_telnet(
     return 1;
 }
 
-int format_dimension_stored_opentsdb_telnet(
+int backends_format_dimension_stored_opentsdb_telnet(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -103,7 +103,7 @@ static inline void opentsdb_build_message(BUFFER *b, char *message, const char *
     );
 }
 
-int format_dimension_collected_opentsdb_http(
+int backends_format_dimension_collected_opentsdb_http(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -151,7 +151,7 @@ int format_dimension_collected_opentsdb_http(
     return 1;
 }
 
-int format_dimension_stored_opentsdb_http(
+int backends_format_dimension_stored_opentsdb_http(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/opentsdb/opentsdb.h b/backends/opentsdb/opentsdb.h
index b9372d91..87d9c5cd 100644
--- a/backends/opentsdb/opentsdb.h
+++ b/backends/opentsdb/opentsdb.h
@@ -5,7 +5,7 @@
 
 #include "backends/backends.h"
 
-extern int format_dimension_collected_opentsdb_telnet(
+extern int backends_format_dimension_collected_opentsdb_telnet(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -17,7 +17,7 @@ extern int format_dimension_collected_opentsdb_telnet(
         , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
 );
 
-extern int format_dimension_stored_opentsdb_telnet(
+extern int backends_format_dimension_stored_opentsdb_telnet(
           BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -31,7 +31,7 @@ extern int format_dimension_stored_opentsdb_telnet(
 
 extern int process_opentsdb_response(BUFFER *b);
 
-int format_dimension_collected_opentsdb_http(
+int backends_format_dimension_collected_opentsdb_http(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
@@ -43,7 +43,7 @@ int format_dimension_collected_opentsdb_http(
         , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
 );
 
-int format_dimension_stored_opentsdb_http(
+int backends_format_dimension_stored_opentsdb_http(
         BUFFER *b                 // the buffer to write data to
         , const char *prefix        // the prefix to use
         , RRDHOST *host             // the host this chart comes from
diff --git a/backends/prometheus/Makefile.in b/backends/prometheus/Makefile.in
deleted file mode 100644
index 00f857a7..00000000
--- a/backends/prometheus/Makefile.in
+++ /dev/null
@@ -1,703 +0,0 @@
-# Makefile.in generated by automake 1.15.1 from Makefile.am.
-# @configure_input@
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-
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-# with or without modifications, as long as this notice is preserved.
-
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-# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
-# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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-	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
-	    if test -d "$(distdir)/$$file"; then \
-	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
-	    fi; \
-	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
-	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
-	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
-	    fi; \
-	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
-	  else \
-	    test -f "$(distdir)/$$file" \
-	    || cp -p $$d/$$file "$(distdir)/$$file" \
-	    || exit 1; \
-	  fi; \
-	done
-	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
-	  if test "$$subdir" = .; then :; else \
-	    $(am__make_dryrun) \
-	      || test -d "$(distdir)/$$subdir" \
-	      || $(MKDIR_P) "$(distdir)/$$subdir" \
-	      || exit 1; \
-	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
-	    $(am__relativize); \
-	    new_distdir=$$reldir; \
-	    dir1=$$subdir; dir2="$(top_distdir)"; \
-	    $(am__relativize); \
-	    new_top_distdir=$$reldir; \
-	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
-	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
-	    ($(am__cd) $$subdir && \
-	      $(MAKE) $(AM_MAKEFLAGS) \
-	        top_distdir="$$new_top_distdir" \
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-		am__remove_distdir=: \
-		am__skip_length_check=: \
-		am__skip_mode_fix=: \
-	        distdir) \
-	      || exit 1; \
-	  fi; \
-	done
-check-am: all-am
-check: check-recursive
-all-am: Makefile $(DATA)
-installdirs: installdirs-recursive
-installdirs-am:
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-	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
-
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-	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
-	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	      install; \
-	else \
-	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
-	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
-	fi
-mostlyclean-generic:
-
-clean-generic:
-
-distclean-generic:
-	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
-	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
-
-maintainer-clean-generic:
-	@echo "This command is intended for maintainers to use"
-	@echo "it deletes files that may require special tools to rebuild."
-	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
-clean: clean-recursive
-
-clean-am: clean-generic mostlyclean-am
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-	distclean distclean-generic distclean-tags distdir dvi dvi-am \
-	html html-am info info-am install install-am install-data \
-	install-data-am install-dvi install-dvi-am install-exec \
-	install-exec-am install-html install-html-am install-info \
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-	install-ps install-ps-am install-strip installcheck \
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-	maintainer-clean-generic mostlyclean mostlyclean-generic pdf \
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-.PRECIOUS: Makefile
-
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
diff --git a/backends/prometheus/README.md b/backends/prometheus/README.md
index e234efe9..10275fa2 100644
--- a/backends/prometheus/README.md
+++ b/backends/prometheus/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "Using Netdata with Prometheus"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/prometheus/README.md
+-->
+
 # Using Netdata with Prometheus
 
 > IMPORTANT: the format Netdata sends metrics to prometheus has changed since Netdata v1.7. The new prometheus backend
@@ -12,7 +17,7 @@ are starting at a fresh ubuntu shell (whether you'd like to follow along in a VM
 
 ### Installing Netdata
 
-There are number of ways to install Netdata according to [Installation](../../packaging/installer/). The suggested way
+There are number of ways to install Netdata according to [Installation](/packaging/installer/README.md). The suggested way
 of installing the latest Netdata and keep it upgrade automatically. Using one line installation:
 
 ```sh
@@ -349,7 +354,7 @@ For more information check prometheus documentation.
 
 ### Streaming data from upstream hosts
 
-The `format=prometheus` parameter only exports the host's Netdata metrics. If you are using the master/slave
+The `format=prometheus` parameter only exports the host's Netdata metrics. If you are using the parent-child
 functionality of Netdata this ignores any upstream hosts - so you should consider using the below in your
 **prometheus.yml**:
 
@@ -381,6 +386,8 @@ To save bandwidth, and because prometheus does not use them anyway, `# TYPE` and
 wanted they can be re-enabled via `types=yes` and `help=yes`, e.g.
 `/api/v1/allmetrics?format=prometheus&types=yes&help=yes`
 
+Note that if enabled, the `# TYPE` and `# HELP` lines are repeated for every occurrence of a metric, which goes against the Prometheus documentation's [specification for these lines](https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md#comments-help-text-and-type-information).
+
 ### Names and IDs
 
 Netdata supports names and IDs for charts and dimensions. Usually IDs are unique identifiers as read by the system and
diff --git a/backends/prometheus/backend_prometheus.c b/backends/prometheus/backend_prometheus.c
index 03323ac5..a3ecf16e 100644
--- a/backends/prometheus/backend_prometheus.c
+++ b/backends/prometheus/backend_prometheus.c
@@ -44,7 +44,7 @@ static inline time_t prometheus_server_last_access(const char *server, RRDHOST *
     return 0;
 }
 
-static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable) {
+static inline size_t backends_prometheus_name_copy(char *d, const char *s, size_t usable) {
     size_t n;
 
     for(n = 0; *s && n < usable ; d++, s++, n++) {
@@ -58,7 +58,7 @@ static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable)
     return n;
 }
 
-static inline size_t prometheus_label_copy(char *d, const char *s, size_t usable) {
+static inline size_t backends_prometheus_label_copy(char *d, const char *s, size_t usable) {
     size_t n;
 
     // make sure we can escape one character without overflowing the buffer
@@ -78,7 +78,7 @@ static inline size_t prometheus_label_copy(char *d, const char *s, size_t usable
     return n;
 }
 
-static inline char *prometheus_units_copy(char *d, const char *s, size_t usable, int showoldunits) {
+static inline char *backends_prometheus_units_copy(char *d, const char *s, size_t usable, int showoldunits) {
     const char *sorig = s;
     char *ret = d;
     size_t n;
@@ -159,7 +159,7 @@ struct host_variables_callback_options {
     RRDHOST *host;
     BUFFER *wb;
     BACKEND_OPTIONS backend_options;
-    PROMETHEUS_OUTPUT_OPTIONS output_options;
+    BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options;
     const char *prefix;
     const char *labels;
     time_t now;
@@ -174,14 +174,14 @@ static int print_host_variables(RRDVAR *rv, void *data) {
         if(!opts->host_header_printed) {
             opts->host_header_printed = 1;
 
-            if(opts->output_options & PROMETHEUS_OUTPUT_HELP) {
+            if(opts->output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP) {
                 buffer_sprintf(opts->wb, "\n# COMMENT global host and chart variables\n");
             }
         }
 
         calculated_number value = rrdvar2number(rv);
         if(isnan(value) || isinf(value)) {
-            if(opts->output_options & PROMETHEUS_OUTPUT_HELP)
+            if(opts->output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP)
                 buffer_sprintf(opts->wb, "# COMMENT variable \"%s\" is %s. Skipped.\n", rv->name, (isnan(value))?"NAN":"INF");
 
             return 0;
@@ -194,9 +194,9 @@ static int print_host_variables(RRDVAR *rv, void *data) {
             label_post = "}";
         }
 
-        prometheus_name_copy(opts->name, rv->name, sizeof(opts->name));
+        backends_prometheus_name_copy(opts->name, rv->name, sizeof(opts->name));
 
-        if(opts->output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+        if(opts->output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
             buffer_sprintf(opts->wb
                            , "%s_%s%s%s%s " CALCULATED_NUMBER_FORMAT " %llu\n"
                            , opts->prefix
@@ -205,7 +205,7 @@ static int print_host_variables(RRDVAR *rv, void *data) {
                            , opts->labels
                            , label_post
                            , value
-                           , ((rv->last_updated) ? rv->last_updated : opts->now) * 1000ULL
+                           , opts->now * 1000ULL
             );
         else
             buffer_sprintf(opts->wb, "%s_%s%s%s%s " CALCULATED_NUMBER_FORMAT "\n"
@@ -223,21 +223,21 @@ static int print_host_variables(RRDVAR *rv, void *data) {
     return 0;
 }
 
-static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb, const char *prefix, BACKEND_OPTIONS backend_options, time_t after, time_t before, int allhosts, PROMETHEUS_OUTPUT_OPTIONS output_options) {
+static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb, const char *prefix, BACKEND_OPTIONS backend_options, time_t after, time_t before, int allhosts, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options) {
     rrdhost_rdlock(host);
 
     char hostname[PROMETHEUS_ELEMENT_MAX + 1];
-    prometheus_label_copy(hostname, host->hostname, PROMETHEUS_ELEMENT_MAX);
+    backends_prometheus_label_copy(hostname, host->hostname, PROMETHEUS_ELEMENT_MAX);
 
     char labels[PROMETHEUS_LABELS_MAX + 1] = "";
     if(allhosts) {
-        if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+        if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
             buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1 %llu\n", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
         else
             buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1\n", hostname, host->program_name, host->program_version);
 
         if(host->tags && *(host->tags)) {
-            if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS) {
+            if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS) {
                 buffer_sprintf(wb, "netdata_host_tags_info{instance=\"%s\",%s} 1 %llu\n", hostname, host->tags, now_realtime_usec() / USEC_PER_MS);
 
                 // deprecated, exists only for compatibility with older queries
@@ -255,13 +255,13 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
         snprintfz(labels, PROMETHEUS_LABELS_MAX, ",instance=\"%s\"", hostname);
     }
     else {
-        if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+        if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
             buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1 %llu\n", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
         else
             buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1\n", hostname, host->program_name, host->program_version);
 
         if(host->tags && *(host->tags)) {
-            if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS) {
+            if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS) {
                 buffer_sprintf(wb, "netdata_host_tags_info{%s} 1 %llu\n", host->tags, now_realtime_usec() / USEC_PER_MS);
 
                 // deprecated, exists only for compatibility with older queries
@@ -277,7 +277,7 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
     }
 
     // send custom variables set for the host
-    if(output_options & PROMETHEUS_OUTPUT_VARIABLES){
+    if(output_options & BACKENDS_PROMETHEUS_OUTPUT_VARIABLES){
         struct host_variables_callback_options opts = {
                 .host = host,
                 .wb = wb,
@@ -299,9 +299,9 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
         char family[PROMETHEUS_ELEMENT_MAX + 1];
         char units[PROMETHEUS_ELEMENT_MAX + 1] = "";
 
-        prometheus_label_copy(chart, (output_options & PROMETHEUS_OUTPUT_NAMES && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
-        prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
-        prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_label_copy(chart, (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
 
         if(likely(backends_can_send_rrdset(backend_options, st))) {
             rrdset_rdlock(st);
@@ -316,14 +316,14 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                     homogeneous = 0;
             }
             else {
-                if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE && !(output_options & PROMETHEUS_OUTPUT_HIDEUNITS))
-                    prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX, output_options & PROMETHEUS_OUTPUT_OLDUNITS);
+                if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE && !(output_options & BACKENDS_PROMETHEUS_OUTPUT_HIDEUNITS))
+                    backends_prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX, output_options & BACKENDS_PROMETHEUS_OUTPUT_OLDUNITS);
             }
 
-            if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
+            if(unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP))
                 buffer_sprintf(wb, "\n# COMMENT %s chart \"%s\", context \"%s\", family \"%s\", units \"%s\"\n"
                                , (homogeneous)?"homogeneous":"heterogeneous"
-                               , (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
+                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
                                , st->context
                                , st->family
                                , st->units
@@ -354,18 +354,18 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                             // all the dimensions of the chart, has the same algorithm, multiplier and divisor
                             // we add all dimensions as labels
 
-                            prometheus_label_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_label_copy(dimension, (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
 
-                            if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
+                            if(unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP))
                                 buffer_sprintf(wb
                                                , "# COMMENT %s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
                                                , prefix
                                                , context
                                                , suffix
-                                               , (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
+                                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
                                                , st->context
                                                , st->family
-                                               , (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
+                                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
                                                , rd->multiplier
                                                , rd->divisor
                                                , h
@@ -373,15 +373,15 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                                                , t
                                 );
 
-                            if(unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
-                                buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s %s\n"
+                            if(unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_TYPES))
+                                buffer_sprintf(wb, "# TYPE %s_%s%s %s\n"
                                                , prefix
                                                , context
                                                , suffix
                                                , t
                                 );
 
-                            if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+                            if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
                                 buffer_sprintf(wb
                                                , "%s_%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
                                                , prefix
@@ -411,19 +411,19 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                             // the dimensions of the chart, do not have the same algorithm, multiplier or divisor
                             // we create a metric per dimension
 
-                            prometheus_name_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_name_copy(dimension, (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
 
-                            if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
+                            if(unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP))
                                 buffer_sprintf(wb
                                                , "# COMMENT %s_%s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
                                                , prefix
                                                , context
                                                , dimension
                                                , suffix
-                                               , (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
+                                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
                                                , st->context
                                                , st->family
-                                               , (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
+                                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
                                                , rd->multiplier
                                                , rd->divisor
                                                , h
@@ -431,8 +431,8 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                                                , t
                                 );
 
-                            if(unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
-                                buffer_sprintf(wb, "# COMMENT TYPE %s_%s_%s%s %s\n"
+                            if(unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_TYPES))
+                                buffer_sprintf(wb, "# TYPE %s_%s_%s%s %s\n"
                                                , prefix
                                                , context
                                                , dimension
@@ -440,7 +440,7 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                                                , t
                                 );
 
-                            if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+                            if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
                                 buffer_sprintf(wb
                                                , "%s_%s_%s%s{chart=\"%s\",family=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
                                                , prefix
@@ -480,29 +480,29 @@ static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER
                             else if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM)
                                 suffix = "_sum";
 
-                            prometheus_label_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_label_copy(dimension, (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
 
-                            if (unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
+                            if (unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP))
                                 buffer_sprintf(wb, "# COMMENT %s_%s%s%s: dimension \"%s\", value is %s, gauge, dt %llu to %llu inclusive\n"
                                                , prefix
                                                , context
                                                , units
                                                , suffix
-                                               , (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
+                                               , (output_options & BACKENDS_PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
                                                , st->units
                                                , (unsigned long long)first_t
                                                , (unsigned long long)last_t
                                 );
 
-                            if (unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
-                                buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s%s gauge\n"
+                            if (unlikely(output_options & BACKENDS_PROMETHEUS_OUTPUT_TYPES))
+                                buffer_sprintf(wb, "# TYPE %s_%s%s%s gauge\n"
                                                , prefix
                                                , context
                                                , units
                                                , suffix
                                 );
 
-                            if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
+                            if(output_options & BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS)
                                 buffer_sprintf(wb, "%s_%s%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " CALCULATED_NUMBER_FORMAT " %llu\n"
                                                , prefix
                                                , context
@@ -581,7 +581,7 @@ inline static void remote_write_split_words(char *str, char **words, int max_wor
     }
 }
 
-void rrd_stats_remote_write_allmetrics_prometheus(
+void backends_rrd_stats_remote_write_allmetrics_prometheus(
         RRDHOST *host
         , const char *__hostname
         , const char *prefix
@@ -593,9 +593,9 @@ void rrd_stats_remote_write_allmetrics_prometheus(
         , size_t *count_dims_skipped
 ) {
     char hostname[PROMETHEUS_ELEMENT_MAX + 1];
-    prometheus_label_copy(hostname, __hostname, PROMETHEUS_ELEMENT_MAX);
+    backends_prometheus_label_copy(hostname, __hostname, PROMETHEUS_ELEMENT_MAX);
 
-    add_host_info("netdata_info", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
+    backends_add_host_info("netdata_info", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
 
     if(host->tags && *(host->tags)) {
         char tags[PROMETHEUS_LABELS_MAX + 1];
@@ -605,10 +605,10 @@ void rrd_stats_remote_write_allmetrics_prometheus(
 
         remote_write_split_words(tags, words, PROMETHEUS_LABELS_MAX_NUMBER);
 
-        add_host_info("netdata_host_tags_info", hostname, NULL, NULL, now_realtime_usec() / USEC_PER_MS);
+        backends_add_host_info("netdata_host_tags_info", hostname, NULL, NULL, now_realtime_usec() / USEC_PER_MS);
 
         for(i = 0; words[i] != NULL && words[i + 1] != NULL && (i + 1) < PROMETHEUS_LABELS_MAX_NUMBER; i += 2) {
-            add_tag(words[i], words[i + 1]);
+            backends_add_tag(words[i], words[i + 1]);
         }
     }
 
@@ -620,9 +620,9 @@ void rrd_stats_remote_write_allmetrics_prometheus(
         char family[PROMETHEUS_ELEMENT_MAX + 1];
         char units[PROMETHEUS_ELEMENT_MAX + 1] = "";
 
-        prometheus_label_copy(chart, (backend_options & BACKEND_OPTION_SEND_NAMES && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
-        prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
-        prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_label_copy(chart, (backend_options & BACKEND_OPTION_SEND_NAMES && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
+        backends_prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
 
         if(likely(backends_can_send_rrdset(backend_options, st))) {
             rrdset_rdlock(st);
@@ -640,7 +640,7 @@ void rrd_stats_remote_write_allmetrics_prometheus(
             }
             else {
                 if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE)
-                    prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX, 0);
+                    backends_prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX, 0);
             }
 
             // for each dimension
@@ -664,20 +664,20 @@ void rrd_stats_remote_write_allmetrics_prometheus(
                             // all the dimensions of the chart, has the same algorithm, multiplier and divisor
                             // we add all dimensions as labels
 
-                            prometheus_label_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_label_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
                             snprintf(name, PROMETHEUS_LABELS_MAX, "%s_%s%s", prefix, context, suffix);
 
-                            add_metric(name, chart, family, dimension, hostname, rd->last_collected_value, timeval_msec(&rd->last_collected_time));
+                            backends_add_metric(name, chart, family, dimension, hostname, rd->last_collected_value, timeval_msec(&rd->last_collected_time));
                             (*count_dims)++;
                         }
                         else {
                             // the dimensions of the chart, do not have the same algorithm, multiplier or divisor
                             // we create a metric per dimension
 
-                            prometheus_name_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_name_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
                             snprintf(name, PROMETHEUS_LABELS_MAX, "%s_%s_%s%s", prefix, context, dimension, suffix);
 
-                            add_metric(name, chart, family, NULL, hostname, rd->last_collected_value, timeval_msec(&rd->last_collected_time));
+                            backends_add_metric(name, chart, family, NULL, hostname, rd->last_collected_value, timeval_msec(&rd->last_collected_time));
                             (*count_dims)++;
                         }
                     }
@@ -694,10 +694,10 @@ void rrd_stats_remote_write_allmetrics_prometheus(
                             else if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM)
                                 suffix = "_sum";
 
-                            prometheus_label_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
+                            backends_prometheus_label_copy(dimension, (backend_options & BACKEND_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
                             snprintf(name, PROMETHEUS_LABELS_MAX, "%s_%s%s%s", prefix, context, units, suffix);
 
-                            add_metric(name, chart, family, dimension, hostname, rd->last_collected_value, timeval_msec(&rd->last_collected_time));
+                            backends_add_metric(name, chart, family, dimension, hostname, value, last_t * MSEC_PER_SEC);
                             (*count_dims)++;
                         }
                     }
@@ -710,7 +710,7 @@ void rrd_stats_remote_write_allmetrics_prometheus(
 }
 #endif /* ENABLE_PROMETHEUS_REMOTE_WRITE */
 
-static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, BACKEND_OPTIONS backend_options, const char *server, time_t now, PROMETHEUS_OUTPUT_OPTIONS output_options) {
+static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, BACKEND_OPTIONS backend_options, const char *server, time_t now, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options) {
     if(!server || !*server) server = "default";
 
     time_t after  = prometheus_server_last_access(server, host, now);
@@ -726,7 +726,7 @@ static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, BACKEND_O
         after = now - global_backend_update_every;
     }
 
-    if(output_options & PROMETHEUS_OUTPUT_HELP) {
+    if(output_options & BACKENDS_PROMETHEUS_OUTPUT_HELP) {
         char *mode;
         if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
             mode = "as collected";
@@ -751,7 +751,7 @@ static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, BACKEND_O
     return after;
 }
 
-void rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options) {
+void backends_rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options) {
     time_t before = now_realtime_sec();
 
     // we start at the point we had stopped before
@@ -760,7 +760,7 @@ void rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BU
     rrd_stats_api_v1_charts_allmetrics_prometheus(host, wb, prefix, backend_options, after, before, 0, output_options);
 }
 
-void rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options) {
+void backends_rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options) {
     time_t before = now_realtime_sec();
 
     // we start at the point we had stopped before
@@ -774,7 +774,7 @@ void rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFF
 }
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
-int process_prometheus_remote_write_response(BUFFER *b) {
+int backends_process_prometheus_remote_write_response(BUFFER *b) {
     if(unlikely(!b)) return 1;
 
     const char *s = buffer_tostring(b);
diff --git a/backends/prometheus/backend_prometheus.h b/backends/prometheus/backend_prometheus.h
index d58d2400..8c14ddc2 100644
--- a/backends/prometheus/backend_prometheus.h
+++ b/backends/prometheus/backend_prometheus.h
@@ -5,22 +5,22 @@
 
 #include "backends/backends.h"
 
-typedef enum prometheus_output_flags {
-    PROMETHEUS_OUTPUT_NONE       = 0,
-    PROMETHEUS_OUTPUT_HELP       = (1 << 0),
-    PROMETHEUS_OUTPUT_TYPES      = (1 << 1),
-    PROMETHEUS_OUTPUT_NAMES      = (1 << 2),
-    PROMETHEUS_OUTPUT_TIMESTAMPS = (1 << 3),
-    PROMETHEUS_OUTPUT_VARIABLES  = (1 << 4),
-	PROMETHEUS_OUTPUT_OLDUNITS   = (1 << 5),
-	PROMETHEUS_OUTPUT_HIDEUNITS  = (1 << 6)
-} PROMETHEUS_OUTPUT_OPTIONS;
+typedef enum backends_prometheus_output_flags {
+    BACKENDS_PROMETHEUS_OUTPUT_NONE       = 0,
+    BACKENDS_PROMETHEUS_OUTPUT_HELP       = (1 << 0),
+    BACKENDS_PROMETHEUS_OUTPUT_TYPES      = (1 << 1),
+    BACKENDS_PROMETHEUS_OUTPUT_NAMES      = (1 << 2),
+    BACKENDS_PROMETHEUS_OUTPUT_TIMESTAMPS = (1 << 3),
+    BACKENDS_PROMETHEUS_OUTPUT_VARIABLES  = (1 << 4),
+    BACKENDS_PROMETHEUS_OUTPUT_OLDUNITS   = (1 << 5),
+    BACKENDS_PROMETHEUS_OUTPUT_HIDEUNITS  = (1 << 6)
+} BACKENDS_PROMETHEUS_OUTPUT_OPTIONS;
 
-extern void rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options);
-extern void rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options);
+extern void backends_rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options);
+extern void backends_rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, BACKENDS_PROMETHEUS_OUTPUT_OPTIONS output_options);
 
 #if ENABLE_PROMETHEUS_REMOTE_WRITE
-extern void rrd_stats_remote_write_allmetrics_prometheus(
+extern void backends_rrd_stats_remote_write_allmetrics_prometheus(
         RRDHOST *host
         , const char *__hostname
         , const char *prefix
@@ -31,7 +31,7 @@ extern void rrd_stats_remote_write_allmetrics_prometheus(
         , size_t *count_dims
         , size_t *count_dims_skipped
 );
-extern int process_prometheus_remote_write_response(BUFFER *b);
+extern int backends_process_prometheus_remote_write_response(BUFFER *b);
 #endif
 
 #endif //NETDATA_BACKEND_PROMETHEUS_H
diff --git a/backends/prometheus/remote_write/Makefile.in b/backends/prometheus/remote_write/Makefile.in
deleted file mode 100644
index 12e8d6d7..00000000
--- a/backends/prometheus/remote_write/Makefile.in
+++ /dev/null
@@ -1,526 +0,0 @@
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diff --git a/backends/prometheus/remote_write/README.md b/backends/prometheus/remote_write/README.md
index 009ded60..b83575e1 100644
--- a/backends/prometheus/remote_write/README.md
+++ b/backends/prometheus/remote_write/README.md
@@ -1,3 +1,8 @@
+<!--
+title: "Prometheus remote write backend"
+custom_edit_url: https://github.com/netdata/netdata/edit/master/backends/prometheus/remote_write/README.md
+-->
+
 # Prometheus remote write backend
 
 ## Prerequisites
diff --git a/backends/prometheus/remote_write/remote_write.cc b/backends/prometheus/remote_write/remote_write.cc
index 91d4305b..9448595c 100644
--- a/backends/prometheus/remote_write/remote_write.cc
+++ b/backends/prometheus/remote_write/remote_write.cc
@@ -6,20 +6,19 @@
 
 using namespace prometheus;
 
+static google::protobuf::Arena arena;
+static WriteRequest *write_request;
 
-google::protobuf::Arena arena;
-WriteRequest *write_request;
-
-void init_write_request() {
+void backends_init_write_request() {
     GOOGLE_PROTOBUF_VERIFY_VERSION;
     write_request = google::protobuf::Arena::CreateMessage<WriteRequest>(&arena);
 }
 
-void clear_write_request() {
+void backends_clear_write_request() {
     write_request->clear_timeseries();
 }
 
-void add_host_info(const char *name, const char *instance, const char *application, const char *version, const int64_t timestamp) {
+void backends_add_host_info(const char *name, const char *instance, const char *application, const char *version, const int64_t timestamp) {
     TimeSeries *timeseries;
     Sample *sample;
     Label *label;
@@ -52,7 +51,7 @@ void add_host_info(const char *name, const char *instance, const char *applicati
 }
 
 // adds tag to the last created timeseries
-void add_tag(char *tag, char *value) {
+void backends_add_tag(char *tag, char *value) {
     TimeSeries *timeseries;
     Label *label;
 
@@ -63,7 +62,7 @@ void add_tag(char *tag, char *value) {
     label->set_value(value);
 }
 
-void add_metric(const char *name, const char *chart, const char *family, const char *dimension, const char *instance, const double value, const int64_t timestamp) {
+void backends_add_metric(const char *name, const char *chart, const char *family, const char *dimension, const char *instance, const double value, const int64_t timestamp) {
     TimeSeries *timeseries;
     Sample *sample;
     Label *label;
@@ -97,13 +96,17 @@ void add_metric(const char *name, const char *chart, const char *family, const c
     sample->set_timestamp(timestamp);
 }
 
-size_t get_write_request_size(){
+size_t backends_get_write_request_size(){
+#if GOOGLE_PROTOBUF_VERSION < 3001000
     size_t size = (size_t)snappy::MaxCompressedLength(write_request->ByteSize());
+#else
+    size_t size = (size_t)snappy::MaxCompressedLength(write_request->ByteSizeLong());
+#endif
 
     return (size < INT_MAX)?size:0;
 }
 
-int pack_write_request(char *buffer, size_t *size) {
+int backends_pack_write_request(char *buffer, size_t *size) {
     std::string uncompressed_write_request;
     if(write_request->SerializeToString(&uncompressed_write_request) == false) return 1;
 
@@ -112,6 +115,6 @@ int pack_write_request(char *buffer, size_t *size) {
     return 0;
 }
 
-void protocol_buffers_shutdown() {
+void backends_protocol_buffers_shutdown() {
     google::protobuf::ShutdownProtobufLibrary();
 }
diff --git a/backends/prometheus/remote_write/remote_write.h b/backends/prometheus/remote_write/remote_write.h
index edcc477b..1307d728 100644
--- a/backends/prometheus/remote_write/remote_write.h
+++ b/backends/prometheus/remote_write/remote_write.h
@@ -7,21 +7,21 @@
 extern "C" {
 #endif
 
-void init_write_request();
+void backends_init_write_request();
 
-void clear_write_request();
+void backends_clear_write_request();
 
-void add_host_info(const char *name, const char *instance, const char *application, const char *version, const int64_t timestamp);
+void backends_add_host_info(const char *name, const char *instance, const char *application, const char *version, const int64_t timestamp);
 
-void add_tag(char *tag, char *value);
+void backends_add_tag(char *tag, char *value);
 
-void add_metric(const char *name, const char *chart, const char *family, const char *dimension, const char *instance, const double value, const int64_t timestamp);
+void backends_add_metric(const char *name, const char *chart, const char *family, const char *dimension, const char *instance, const double value, const int64_t timestamp);
 
-size_t get_write_request_size();
+size_t backends_get_write_request_size();
 
-int pack_write_request(char *buffer, size_t *size);
+int backends_pack_write_request(char *buffer, size_t *size);
 
-void protocol_buffers_shutdown();
+void backends_protocol_buffers_shutdown();
 
 #ifdef __cplusplus
 }