Merging upstream version 1.34.0.

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

1 files changed, 0 insertions, 1247 deletions

diff --git a/backends/backends.c b/backends/backends.c
deleted file mode 100644
index dca21ef1c..000000000
--- a/backends/backends.c
+++ /dev/null
@@ -1,1247 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#define BACKENDS_INTERNALS
-#include "backends.h"
-
-// ----------------------------------------------------------------------------
-// How backends work in netdata:
-//
-// 1. There is an independent thread that runs at the required interval
-//    (for example, once every 10 seconds)
-//
-// 2. Every time it wakes, it calls the backend formatting functions to build
-//    a buffer of data. This is a very fast, memory only operation.
-//
-// 3. If the buffer already includes data, the new data are appended.
-//    If the buffer becomes too big, because the data cannot be sent, a
-//    log is written and the buffer is discarded.
-//
-// 4. Then it tries to send all the data. It blocks until all the data are sent
-//    or the socket returns an error.
-//    If the time required for this is above the interval, it starts skipping
-//    intervals, but the calculated values include the entire database, without
-//    gaps (it remembers the timestamps and continues from where it stopped).
-//
-// 5. repeats the above forever.
-//
-
-const char *global_backend_prefix = "netdata";
-const char *global_backend_send_charts_matching = "*";
-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
-
-size_t backend_name_copy(char *d, const char *s, size_t usable) {
-    size_t n;
-
-    for(n = 0; *s && n < usable ; d++, s++, n++) {
-        char c = *s;
-
-        if(c != '.' && !isalnum(c)) *d = '_';
-        else *d = c;
-    }
-    *d = '\0';
-
-    return n;
-}
-
-// calculate the SUM or AVERAGE of a dimension, for any timeframe
-// may return NAN if the database does not have any value in the give timeframe
-
-calculated_number backend_calculate_value_from_stored_data(
-          RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
-        , time_t *first_timestamp   // the first point of the database used in this response
-        , time_t *last_timestamp    // the timestamp that should be reported to backend
-) {
-    RRDHOST *host = st->rrdhost;
-    (void)host;
-
-    // find the edges of the rrd database for this chart
-    time_t first_t = rd->state->query_ops.oldest_time(rd);
-    time_t last_t  = rd->state->query_ops.latest_time(rd);
-    time_t update_every = st->update_every;
-    struct rrddim_query_handle handle;
-    storage_number n;
-
-    // step back a little, to make sure we have complete data collection
-    // for all metrics
-    after  -= update_every * 2;
-    before -= update_every * 2;
-
-    // align the time-frame
-    after  = after  - (after  % update_every);
-    before = before - (before % update_every);
-
-    // for before, loose another iteration
-    // the latest point will be reported the next time
-    before -= update_every;
-
-    if(unlikely(after > before))
-        // this can happen when update_every > before - after
-        after = before;
-
-    if(unlikely(after < first_t))
-        after = first_t;
-
-    if(unlikely(before > last_t))
-        before = last_t;
-
-    if(unlikely(before < first_t || after > last_t)) {
-        // the chart has not been updated in the wanted timeframe
-        debug(D_BACKEND, "BACKEND: %s.%s.%s: aligned timeframe %lu to %lu is outside the chart's database range %lu to %lu",
-              host->hostname, st->id, rd->id,
-              (unsigned long)after, (unsigned long)before,
-              (unsigned long)first_t, (unsigned long)last_t
-        );
-        return NAN;
-    }
-
-    *first_timestamp = after;
-    *last_timestamp = before;
-
-    size_t counter = 0;
-    calculated_number sum = 0;
-
-/*
-    long    start_at_slot = rrdset_time2slot(st, before),
-            stop_at_slot  = rrdset_time2slot(st, after),
-            slot, stop_now = 0;
-
-    for(slot = start_at_slot; !stop_now ; slot--) {
-
-        if(unlikely(slot < 0)) slot = st->entries - 1;
-        if(unlikely(slot == stop_at_slot)) stop_now = 1;
-
-        storage_number n = rd->values[slot];
-
-        if(unlikely(!does_storage_number_exist(n))) {
-            // not collected
-            continue;
-        }
-
-        calculated_number value = unpack_storage_number(n);
-        sum += value;
-
-        counter++;
-    }
-*/
-    for(rd->state->query_ops.init(rd, &handle, after, before) ; !rd->state->query_ops.is_finished(&handle) ; ) {
-        time_t curr_t;
-        n = rd->state->query_ops.next_metric(&handle, &curr_t);
-
-        if(unlikely(!does_storage_number_exist(n))) {
-            // not collected
-            continue;
-        }
-
-        calculated_number value = unpack_storage_number(n);
-        sum += value;
-
-        counter++;
-    }
-    rd->state->query_ops.finalize(&handle);
-    if(unlikely(!counter)) {
-        debug(D_BACKEND, "BACKEND: %s.%s.%s: no values stored in database for range %lu to %lu",
-              host->hostname, st->id, rd->id,
-              (unsigned long)after, (unsigned long)before
-        );
-        return NAN;
-    }
-
-    if(unlikely(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM))
-        return sum;
-
-    return sum / (calculated_number)counter;
-}
-
-
-// discard a response received by a backend
-// after logging a simple of it to error.log
-
-int discard_response(BUFFER *b, const char *backend) {
-    char sample[1024];
-    const char *s = buffer_tostring(b);
-    char *d = sample, *e = &sample[sizeof(sample) - 1];
-
-    for(; *s && d < e ;s++) {
-        char c = *s;
-        if(unlikely(!isprint(c))) c = ' ';
-        *d++ = c;
-    }
-    *d = '\0';
-
-    info("BACKEND: received %zu bytes from %s backend. Ignoring them. Sample: '%s'", buffer_strlen(b), backend, sample);
-    buffer_flush(b);
-    return 0;
-}
-
-
-// ----------------------------------------------------------------------------
-// the backend thread
-
-static SIMPLE_PATTERN *charts_pattern = NULL;
-static SIMPLE_PATTERN *hosts_pattern = NULL;
-
-inline int backends_can_send_rrdset(BACKEND_OPTIONS backend_options, RRDSET *st) {
-    RRDHOST *host = st->rrdhost;
-    (void)host;
-
-    if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_BACKEND_IGNORE)))
-        return 0;
-
-    if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_BACKEND_SEND))) {
-        // we have not checked this chart
-        if(simple_pattern_matches(charts_pattern, st->id) || simple_pattern_matches(charts_pattern, st->name))
-            rrdset_flag_set(st, RRDSET_FLAG_BACKEND_SEND);
-        else {
-            rrdset_flag_set(st, RRDSET_FLAG_BACKEND_IGNORE);
-            debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is disabled for backends.", st->id, host->hostname);
-            return 0;
-        }
-    }
-
-    if(unlikely(!rrdset_is_available_for_exporting_and_alarms(st))) {
-        debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is not available for backends.", st->id, host->hostname);
-        return 0;
-    }
-
-    if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE && !(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED))) {
-        debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s' because its memory mode is '%s' and the backend requires database access.", st->id, host->hostname, rrd_memory_mode_name(host->rrd_memory_mode));
-        return 0;
-    }
-
-    return 1;
-}
-
-inline BACKEND_OPTIONS backend_parse_data_source(const char *source, BACKEND_OPTIONS backend_options) {
-    if(!strcmp(source, "raw") || !strcmp(source, "as collected") || !strcmp(source, "as-collected") || !strcmp(source, "as_collected") || !strcmp(source, "ascollected")) {
-        backend_options |= BACKEND_SOURCE_DATA_AS_COLLECTED;
-        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AS_COLLECTED);
-    }
-    else if(!strcmp(source, "average")) {
-        backend_options |= BACKEND_SOURCE_DATA_AVERAGE;
-        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AVERAGE);
-    }
-    else if(!strcmp(source, "sum") || !strcmp(source, "volume")) {
-        backend_options |= BACKEND_SOURCE_DATA_SUM;
-        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_SUM);
-    }
-    else {
-        error("BACKEND: invalid data source method '%s'.", source);
-    }
-
-    return backend_options;
-}
-
-static void backends_main_cleanup(void *ptr) {
-    struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
-    static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
-
-    info("cleaning up...");
-
-    static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
-}
-
-/**
- * Set Kinesis variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_kinesis_variables(int *default_port,
-                                   backend_response_checker_t brc,
-                                   backend_request_formatter_t brf)
-{
-    (void)default_port;
-#ifndef HAVE_KINESIS
-    (void)brc;
-    (void)brf;
-#endif
-
-#if HAVE_KINESIS
-    *brc = process_json_response;
-    if (BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_json_plaintext;
-    else
-        *brf = backends_format_dimension_stored_json_plaintext;
-#endif
-}
-
-/**
- * Set Prometheus variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_prometheus_variables(int *default_port,
-                                      backend_response_checker_t brc,
-                                      backend_request_formatter_t brf)
-{
-    (void)default_port;
-    (void)brf;
-#ifndef ENABLE_PROMETHEUS_REMOTE_WRITE
-    (void)brc;
-#endif
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-    *brc = backends_process_prometheus_remote_write_response;
-#endif /* ENABLE_PROMETHEUS_REMOTE_WRITE */
-}
-
-/**
- * Set MongoDB variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_mongodb_variables(int *default_port,
-                                      backend_response_checker_t brc,
-                                      backend_request_formatter_t brf)
-{
-    (void)default_port;
-#ifndef HAVE_MONGOC
-    (void)brc;
-    (void)brf;
-#endif
-
-#if HAVE_MONGOC
-    *brc = process_json_response;
-    if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_json_plaintext;
-    else
-        *brf = backends_format_dimension_stored_json_plaintext;
-#endif
-}
-
-/**
- * Set JSON variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_json_variables(int *default_port,
-                                backend_response_checker_t brc,
-                                backend_request_formatter_t brf)
-{
-    *default_port = 5448;
-    *brc = process_json_response;
-
-    if (BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_json_plaintext;
-    else
-        *brf = backends_format_dimension_stored_json_plaintext;
-}
-
-/**
- * Set OpenTSDB HTTP variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_opentsdb_http_variables(int *default_port,
-                                         backend_response_checker_t brc,
-                                         backend_request_formatter_t brf)
-{
-    *default_port = 4242;
-    *brc = process_opentsdb_response;
-
-    if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_opentsdb_http;
-    else
-        *brf = backends_format_dimension_stored_opentsdb_http;
-
-}
-
-/**
- * Set OpenTSDB Telnet variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_opentsdb_telnet_variables(int *default_port,
-                                           backend_response_checker_t brc,
-                                           backend_request_formatter_t brf)
-{
-    *default_port = 4242;
-    *brc = process_opentsdb_response;
-
-    if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_opentsdb_telnet;
-    else
-        *brf = backends_format_dimension_stored_opentsdb_telnet;
-}
-
-/**
- * Set Graphite variables
- *
- * Set the variables necessary to work with this specific backend.
- *
- * @param default_port the default port of the backend
- * @param brc function called to check the result.
- * @param brf function called to format the message to the backend
- */
-void backend_set_graphite_variables(int *default_port,
-                                    backend_response_checker_t brc,
-                                    backend_request_formatter_t brf)
-{
-    *default_port = 2003;
-    *brc = process_graphite_response;
-
-    if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
-        *brf = backends_format_dimension_collected_graphite_plaintext;
-    else
-        *brf = backends_format_dimension_stored_graphite_plaintext;
-}
-
-/**
- * Select Type
- *
- * Select the backend type based in the user input
- *
- * @param type is the string that defines the backend type
- *
- * @return It returns the backend id.
- */
-BACKEND_TYPE backend_select_type(const char *type) {
-    if(!strcmp(type, "graphite") || !strcmp(type, "graphite:plaintext")) {
-        return BACKEND_TYPE_GRAPHITE;
-    }
-    else if(!strcmp(type, "opentsdb") || !strcmp(type, "opentsdb:telnet")) {
-        return BACKEND_TYPE_OPENTSDB_USING_TELNET;
-    }
-    else if(!strcmp(type, "opentsdb:http") || !strcmp(type, "opentsdb:https")) {
-        return BACKEND_TYPE_OPENTSDB_USING_HTTP;
-    }
-    else if (!strcmp(type, "json") || !strcmp(type, "json:plaintext")) {
-        return BACKEND_TYPE_JSON;
-    }
-    else if (!strcmp(type, "prometheus_remote_write")) {
-        return  BACKEND_TYPE_PROMETHEUS_REMOTE_WRITE;
-    }
-    else if (!strcmp(type, "kinesis") || !strcmp(type, "kinesis:plaintext")) {
-        return BACKEND_TYPE_KINESIS;
-    }
-    else if (!strcmp(type, "mongodb") || !strcmp(type, "mongodb:plaintext")) {
-        return BACKEND_TYPE_MONGODB;
-    }
-
-    return BACKEND_TYPE_UNKNOWN;
-}
-
-/**
- * Backend main
- *
- * The main thread used to control the backends.
- *
- * @param ptr a pointer to netdata_static_structure.
- *
- * @return It always return NULL.
- */
-void *backends_main(void *ptr) {
-    netdata_thread_cleanup_push(backends_main_cleanup, ptr);
-
-    int default_port = 0;
-    int sock = -1;
-    BUFFER *b = buffer_create(1), *response = buffer_create(1);
-    int (*backend_request_formatter)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, BACKEND_OPTIONS) = NULL;
-    int (*backend_response_checker)(BUFFER *) = NULL;
-
-#if HAVE_KINESIS
-    int do_kinesis = 0;
-    char *kinesis_auth_key_id = NULL, *kinesis_secure_key = NULL, *kinesis_stream_name = NULL;
-#endif
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-    int do_prometheus_remote_write = 0;
-    BUFFER *http_request_header = NULL;
-#endif
-
-#if HAVE_MONGOC
-    int do_mongodb = 0;
-    char *mongodb_uri = NULL;
-    char *mongodb_database = NULL;
-    char *mongodb_collection = NULL;
-
-    // set the default socket timeout in ms
-    int32_t mongodb_default_socket_timeout = (int32_t)(global_backend_update_every >= 2)?(global_backend_update_every * MSEC_PER_SEC - 500):1000;
-
-#endif
-
-#ifdef ENABLE_HTTPS
-            struct netdata_ssl opentsdb_ssl = {NULL , NETDATA_SSL_START};
-#endif
-
-    // ------------------------------------------------------------------------
-    // collect configuration options
-
-    struct timeval timeout = {
-            .tv_sec = 0,
-            .tv_usec = 0
-    };
-    int enabled                 = config_get_boolean(CONFIG_SECTION_BACKEND, "enabled", 0);
-    const char *source          = config_get(CONFIG_SECTION_BACKEND, "data source", "average");
-    const char *type            = config_get(CONFIG_SECTION_BACKEND, "type", "graphite");
-    const char *destination     = config_get(CONFIG_SECTION_BACKEND, "destination", "localhost");
-    global_backend_prefix       = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata");
-    const char *hostname        = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname);
-    global_backend_update_every = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", global_backend_update_every);
-    int buffer_on_failures      = (int)config_get_number(CONFIG_SECTION_BACKEND, "buffer on failures", 10);
-    long timeoutms              = config_get_number(CONFIG_SECTION_BACKEND, "timeout ms", global_backend_update_every * 2 * 1000);
-
-    if(config_get_boolean(CONFIG_SECTION_BACKEND, "send names instead of ids", (global_backend_options & BACKEND_OPTION_SEND_NAMES)))
-        global_backend_options |= BACKEND_OPTION_SEND_NAMES;
-    else
-        global_backend_options &= ~BACKEND_OPTION_SEND_NAMES;
-
-    charts_pattern = simple_pattern_create(
-        global_backend_send_charts_matching = config_get(CONFIG_SECTION_BACKEND, "send charts matching", "*"),
-        NULL,
-        SIMPLE_PATTERN_EXACT);
-    hosts_pattern  = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send hosts matching", "localhost *"), NULL, SIMPLE_PATTERN_EXACT);
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-    const char *remote_write_path = config_get(CONFIG_SECTION_BACKEND, "remote write URL path", "/receive");
-#endif
-
-    // ------------------------------------------------------------------------
-    // validate configuration options
-    // 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);
-        timeoutms = global_backend_update_every * 2 * 1000;
-    }
-    timeout.tv_sec  = (timeoutms * 1000) / 1000000;
-    timeout.tv_usec = (timeoutms * 1000) % 1000000;
-
-    if(!enabled || global_backend_update_every < 1)
-        goto cleanup;
-
-    // ------------------------------------------------------------------------
-    // select the backend type
-    BACKEND_TYPE work_type = backend_select_type(type);
-    if (work_type == BACKEND_TYPE_UNKNOWN) {
-        error("BACKEND: Unknown backend type '%s'", type);
-        goto cleanup;
-    }
-
-    switch (work_type) {
-        case BACKEND_TYPE_OPENTSDB_USING_HTTP: {
-#ifdef ENABLE_HTTPS
-            if (!strcmp(type, "opentsdb:https")) {
-                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_PROMETHEUS_REMOTE_WRITE: {
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-            do_prometheus_remote_write = 1;
-
-            http_request_header = buffer_create(1);
-            backends_init_write_request();
-#else
-            error("BACKEND: Prometheus remote write support isn't compiled");
-#endif // ENABLE_PROMETHEUS_REMOTE_WRITE
-            backend_set_prometheus_variables(&default_port,&backend_response_checker,&backend_request_formatter);
-            break;
-        }
-        case BACKEND_TYPE_KINESIS: {
-#if HAVE_KINESIS
-            do_kinesis = 1;
-
-            if(unlikely(read_kinesis_conf(netdata_configured_user_config_dir, &kinesis_auth_key_id, &kinesis_secure_key, &kinesis_stream_name))) {
-                error("BACKEND: kinesis backend type is set but cannot read its configuration from %s/aws_kinesis.conf", netdata_configured_user_config_dir);
-                goto cleanup;
-            }
-
-            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
-            backend_set_kinesis_variables(&default_port,&backend_response_checker,&backend_request_formatter);
-            break;
-        }
-        case BACKEND_TYPE_MONGODB: {
-#if HAVE_MONGOC
-            if(unlikely(read_mongodb_conf(netdata_configured_user_config_dir,
-                                          &mongodb_uri,
-                                          &mongodb_database,
-                                          &mongodb_collection))) {
-                error("BACKEND: mongodb backend type is set but cannot read its configuration from %s/mongodb.conf",
-                      netdata_configured_user_config_dir);
-                goto cleanup;
-            }
-
-            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;
-            }
-            else {
-                error("BACKEND: cannot initialize MongoDB backend");
-                goto cleanup;
-            }
-#else
-            error("BACKEND: MongoDB support isn't compiled");
-#endif // HAVE_MONGOC
-            break;
-        }
-        case BACKEND_TYPE_GRAPHITE: {
-            backend_set_graphite_variables(&default_port,&backend_response_checker,&backend_request_formatter);
-            break;
-        }
-        case BACKEND_TYPE_OPENTSDB_USING_TELNET: {
-            backend_set_opentsdb_telnet_variables(&default_port,&backend_response_checker,&backend_request_formatter);
-            break;
-        }
-        case BACKEND_TYPE_JSON: {
-            backend_set_json_variables(&default_port,&backend_response_checker,&backend_request_formatter);
-            break;
-        }
-        case BACKEND_TYPE_UNKNOWN: {
-            break;
-        }
-        default: {
-            break;
-        }
-    }
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-    if((backend_request_formatter == NULL && !do_prometheus_remote_write) || backend_response_checker == NULL) {
-#else
-    if(backend_request_formatter == NULL || backend_response_checker == NULL) {
-#endif
-        error("BACKEND: backend is misconfigured - disabling it.");
-        goto cleanup;
-    }
-
-
-// ------------------------------------------------------------------------
-// prepare the charts for monitoring the backend operation
-
-    struct rusage thread;
-
-    collected_number
-        chart_buffered_metrics = 0,
-        chart_lost_metrics = 0,
-        chart_sent_metrics = 0,
-        chart_buffered_bytes = 0,
-        chart_received_bytes = 0,
-        chart_sent_bytes = 0,
-        chart_receptions = 0,
-        chart_transmission_successes = 0,
-        chart_transmission_failures = 0,
-        chart_data_lost_events = 0,
-        chart_lost_bytes = 0,
-        chart_backend_reconnects = 0;
-        // chart_backend_latency = 0;
-
-    RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", "backends", NULL, 130600, global_backend_update_every, RRDSET_TYPE_LINE);
-    rrddim_add(chart_metrics, "buffered", NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_metrics, "lost",     NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_metrics, "sent",     NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
-
-    RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KiB", "backends", NULL, 130610, global_backend_update_every, RRDSET_TYPE_AREA);
-    rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_bytes, "lost",     NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_bytes, "sent",     NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-
-    RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", "backends", NULL, 130630, global_backend_update_every, RRDSET_TYPE_LINE);
-    rrddim_add(chart_ops, "write",     NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_ops, "discard",   NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_ops, "failure",   NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-    rrddim_add(chart_ops, "read",      NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-
-    /*
-    * this is misleading - we can only measure the time we need to send data
-    * this time is not related to the time required for the data to travel to
-    * the backend database and the time that server needed to process them
-    *
-    * issue #1432 and https://www.softlab.ntua.gr/facilities/documentation/unix/unix-socket-faq/unix-socket-faq-2.html
-    *
-    RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", "backends", NULL, 130620, global_backend_update_every, RRDSET_TYPE_AREA);
-    rrddim_add(chart_latency, "latency",   NULL,  1, 1000, RRD_ALGORITHM_ABSOLUTE);
-    */
-
-    RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "Netdata Backend Thread CPU usage", "milliseconds/s", "backends", NULL, 130630, global_backend_update_every, RRDSET_TYPE_STACKED);
-    rrddim_add(chart_rusage, "user",   NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
-    rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
-
-
-    // ------------------------------------------------------------------------
-    // 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();
-    int failures = 0;
-    heartbeat_t hb;
-    heartbeat_init(&hb);
-
-    while(!netdata_exit) {
-
-        // ------------------------------------------------------------------------
-        // Wait for the next iteration point.
-
-        heartbeat_next(&hb, step_ut);
-        time_t before = now_realtime_sec();
-        debug(D_BACKEND, "BACKEND: preparing buffer for timeframe %lu to %lu", (unsigned long)after, (unsigned long)before);
-
-        // ------------------------------------------------------------------------
-        // add to the buffer the data we need to send to the backend
-
-        netdata_thread_disable_cancelability();
-
-        size_t count_hosts = 0;
-        size_t count_charts_total = 0;
-        size_t count_dims_total = 0;
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-        if(do_prometheus_remote_write)
-            backends_clear_write_request();
-#endif
-        rrd_rdlock();
-        RRDHOST *host;
-        rrdhost_foreach_read(host) {
-            if(unlikely(!rrdhost_flag_check(host, RRDHOST_FLAG_BACKEND_SEND|RRDHOST_FLAG_BACKEND_DONT_SEND))) {
-                char *name = (host == localhost)?"localhost":host->hostname;
-                if (!hosts_pattern || simple_pattern_matches(hosts_pattern, name)) {
-                    rrdhost_flag_set(host, RRDHOST_FLAG_BACKEND_SEND);
-                    info("enabled backend for host '%s'", name);
-                }
-                else {
-                    rrdhost_flag_set(host, RRDHOST_FLAG_BACKEND_DONT_SEND);
-                    info("disabled backend for host '%s'", name);
-                }
-            }
-
-            if(unlikely(!rrdhost_flag_check(host, RRDHOST_FLAG_BACKEND_SEND)))
-                continue;
-
-            rrdhost_rdlock(host);
-
-            count_hosts++;
-            size_t count_charts = 0;
-            size_t count_dims = 0;
-            size_t count_dims_skipped = 0;
-
-            const char *__hostname = (host == localhost)?hostname:host->hostname;
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-            if(do_prometheus_remote_write) {
-                backends_rrd_stats_remote_write_allmetrics_prometheus(
-                    host
-                    , __hostname
-                    , global_backend_prefix
-                    , global_backend_options
-                    , after
-                    , before
-                    , &count_charts
-                    , &count_dims
-                    , &count_dims_skipped
-                );
-                chart_buffered_metrics += count_dims;
-            }
-            else
-#endif
-            {
-                RRDSET *st;
-                rrdset_foreach_read(st, host) {
-                    if(likely(backends_can_send_rrdset(global_backend_options, st))) {
-                        rrdset_rdlock(st);
-
-                        count_charts++;
-
-                        RRDDIM *rd;
-                        rrddim_foreach_read(rd, st) {
-                            if (likely(rd->last_collected_time.tv_sec >= after)) {
-                                chart_buffered_metrics += backend_request_formatter(b, global_backend_prefix, host, __hostname, st, rd, after, before, global_backend_options);
-                                count_dims++;
-                            }
-                            else {
-                                debug(D_BACKEND, "BACKEND: not sending dimension '%s' of chart '%s' from host '%s', its last data collection (%lu) is not within our timeframe (%lu to %lu)", rd->id, st->id, __hostname, (unsigned long)rd->last_collected_time.tv_sec, (unsigned long)after, (unsigned long)before);
-                                count_dims_skipped++;
-                            }
-                        }
-
-                        rrdset_unlock(st);
-                    }
-                }
-            }
-
-            debug(D_BACKEND, "BACKEND: sending host '%s', metrics of %zu dimensions, of %zu charts. Skipped %zu dimensions.", __hostname, count_dims, count_charts, count_dims_skipped);
-            count_charts_total += count_charts;
-            count_dims_total += count_dims;
-
-            rrdhost_unlock(host);
-        }
-        rrd_unlock();
-
-        netdata_thread_enable_cancelability();
-
-        debug(D_BACKEND, "BACKEND: buffer has %zu bytes, added metrics for %zu dimensions, of %zu charts, from %zu hosts", buffer_strlen(b), count_dims_total, count_charts_total, count_hosts);
-
-        // ------------------------------------------------------------------------
-
-        chart_buffered_bytes = (collected_number)buffer_strlen(b);
-
-        // reset the monitoring chart counters
-        chart_received_bytes =
-        chart_sent_bytes =
-        chart_sent_metrics =
-        chart_lost_metrics =
-        chart_receptions =
-        chart_transmission_successes =
-        chart_transmission_failures =
-        chart_data_lost_events =
-        chart_lost_bytes =
-        chart_backend_reconnects = 0;
-        // chart_backend_latency = 0;
-
-        if(unlikely(netdata_exit)) break;
-
-        //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b));
-        //fprintf(stderr, "after = %lu, before = %lu\n", after, before);
-
-        // prepare for the next iteration
-        // to add incrementally data to buffer
-        after = before;
-
-#if HAVE_KINESIS
-        if(do_kinesis) {
-            unsigned long long partition_key_seq = 0;
-
-            size_t buffer_len = buffer_strlen(b);
-            size_t sent = 0;
-
-            while(sent < buffer_len) {
-                char partition_key[KINESIS_PARTITION_KEY_MAX + 1];
-                snprintf(partition_key, KINESIS_PARTITION_KEY_MAX, "netdata_%llu", partition_key_seq++);
-                size_t partition_key_len = strnlen(partition_key, KINESIS_PARTITION_KEY_MAX);
-
-                const char *first_char = buffer_tostring(b) + sent;
-
-                size_t record_len = 0;
-
-                // split buffer into chunks of maximum allowed size
-                if(buffer_len - sent < KINESIS_RECORD_MAX - partition_key_len) {
-                    record_len = buffer_len - sent;
-                }
-                else {
-                    record_len = KINESIS_RECORD_MAX - partition_key_len;
-                    while(*(first_char + record_len) != '\n' && record_len) record_len--;
-                }
-
-                char error_message[ERROR_LINE_MAX + 1] = "";
-
-                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);
-
-                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(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.",
-                          destination, sent_bytes, sent_bytes - lost_bytes);
-
-                    chart_transmission_failures++;
-                    chart_data_lost_events++;
-                    chart_lost_bytes += lost_bytes;
-
-                    // estimate the number of lost metrics
-                    chart_lost_metrics += (collected_number)(chart_buffered_metrics
-                                          * (buffer_len && (lost_bytes > buffer_len) ? (double)lost_bytes / buffer_len : 1));
-
-                    break;
-                }
-                else {
-                    chart_receptions++;
-                }
-
-                if(unlikely(netdata_exit)) break;
-            }
-
-            chart_sent_bytes += sent;
-            if(likely(sent == buffer_len))
-                chart_sent_metrics = chart_buffered_metrics;
-
-            buffer_flush(b);
-        } else
-#endif /* HAVE_KINESIS */
-
-#if HAVE_MONGOC
-        if(do_mongodb) {
-            size_t buffer_len = buffer_strlen(b);
-            size_t sent = 0;
-
-            while(sent < buffer_len) {
-                const char *first_char = buffer_tostring(b);
-
-                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(!backends_mongodb_insert((char *)first_char, (size_t)chart_buffered_metrics))) {
-                    sent += buffer_len;
-                    chart_transmission_successes++;
-                    chart_receptions++;
-                }
-                else {
-                    // oops! we couldn't send (all or some of the) data
-                    error("BACKEND: failed to write data to database backend '%s'. Willing to write %zu bytes, wrote %zu bytes.",
-                          mongodb_uri, buffer_len, 0UL);
-
-                    chart_transmission_failures++;
-                    chart_data_lost_events++;
-                    chart_lost_bytes += buffer_len;
-
-                    // estimate the number of lost metrics
-                    chart_lost_metrics += (collected_number)chart_buffered_metrics;
-
-                    break;
-                }
-
-                if(unlikely(netdata_exit)) break;
-            }
-
-            chart_sent_bytes += sent;
-            if(likely(sent == buffer_len))
-                chart_sent_metrics = chart_buffered_metrics;
-
-            buffer_flush(b);
-        } else
-#endif /* HAVE_MONGOC */
-
-        {
-
-            // ------------------------------------------------------------------------
-            // if we are connected, receive a response, without blocking
-
-            if(likely(sock != -1)) {
-                errno = 0;
-
-                // loop through to collect all data
-                while(sock != -1 && errno != EWOULDBLOCK) {
-                    buffer_need_bytes(response, 4096);
-
-                    ssize_t r;
-#ifdef ENABLE_HTTPS
-                    if(opentsdb_ssl.conn && !opentsdb_ssl.flags) {
-                        r = SSL_read(opentsdb_ssl.conn, &response->buffer[response->len], response->size - response->len);
-                    } else {
-                        r = recv(sock, &response->buffer[response->len], response->size - response->len, MSG_DONTWAIT);
-                    }
-#else
-                    r = recv(sock, &response->buffer[response->len], response->size - response->len, MSG_DONTWAIT);
-#endif
-                    if(likely(r > 0)) {
-                        // we received some data
-                        response->len += r;
-                        chart_received_bytes += r;
-                        chart_receptions++;
-                    }
-                    else if(r == 0) {
-                        error("BACKEND: '%s' closed the socket", destination);
-                        close(sock);
-                        sock = -1;
-                    }
-                    else {
-                        // failed to receive data
-                        if(errno != EAGAIN && errno != EWOULDBLOCK) {
-                            error("BACKEND: cannot receive data from backend '%s'.", destination);
-                        }
-                    }
-                }
-
-                // if we received data, process them
-                if(buffer_strlen(response))
-                    backend_response_checker(response);
-            }
-
-            // ------------------------------------------------------------------------
-            // if we are not connected, connect to a backend server
-
-            if(unlikely(sock == -1)) {
-                // usec_t start_ut = now_monotonic_usec();
-                size_t reconnects = 0;
-
-                sock = connect_to_one_of(destination, default_port, &timeout, &reconnects, NULL, 0);
-#ifdef ENABLE_HTTPS
-                if(sock != -1) {
-                    if(netdata_exporting_ctx) {
-                        if(!opentsdb_ssl.conn) {
-                            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;
-                            }
-                        } else {
-                            SSL_clear(opentsdb_ssl.conn);
-                        }
-                    }
-
-                    if(opentsdb_ssl.conn) {
-                        if(SSL_set_fd(opentsdb_ssl.conn, sock) != 1) {
-                            error("Failed to set the socket to the SSL on socket fd %d.", host->rrdpush_sender_socket);
-                            opentsdb_ssl.flags = NETDATA_SSL_NO_HANDSHAKE;
-                        } else {
-                            opentsdb_ssl.flags = NETDATA_SSL_HANDSHAKE_COMPLETE;
-                            SSL_set_connect_state(opentsdb_ssl.conn);
-                            int err = SSL_connect(opentsdb_ssl.conn);
-                            if (err != 1) {
-                                err = SSL_get_error(opentsdb_ssl.conn, err);
-                                error("SSL cannot connect with the server:  %s ", ERR_error_string((long)SSL_get_error(opentsdb_ssl.conn, err), NULL));
-                                opentsdb_ssl.flags = NETDATA_SSL_NO_HANDSHAKE;
-                            } //TODO: check certificate here
-                        }
-                    }
-                }
-#endif
-                chart_backend_reconnects += reconnects;
-                // chart_backend_latency += now_monotonic_usec() - start_ut;
-            }
-
-            if(unlikely(netdata_exit)) break;
-
-            // ------------------------------------------------------------------------
-            // if we are connected, send our buffer to the backend server
-
-            if(likely(sock != -1)) {
-                size_t len = buffer_strlen(b);
-                // usec_t start_ut = now_monotonic_usec();
-                int flags = 0;
-    #ifdef MSG_NOSIGNAL
-                flags += MSG_NOSIGNAL;
-    #endif
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-                if(do_prometheus_remote_write) {
-                    size_t data_size = backends_get_write_request_size();
-
-                    if(unlikely(!data_size)) {
-                        error("BACKEND: write request size is out of range");
-                        continue;
-                    }
-
-                    buffer_flush(b);
-                    buffer_need_bytes(b, data_size);
-                    if(unlikely(backends_pack_write_request(b->buffer, &data_size))) {
-                        error("BACKEND: cannot pack write request");
-                        continue;
-                    }
-                    b->len = data_size;
-                    chart_buffered_bytes = (collected_number)buffer_strlen(b);
-
-                    buffer_flush(http_request_header);
-                    buffer_sprintf(http_request_header,
-                                    "POST %s HTTP/1.1\r\n"
-                                    "Host: %s\r\n"
-                                    "Accept: */*\r\n"
-                                    "Content-Length: %zu\r\n"
-                                    "Content-Type: application/x-www-form-urlencoded\r\n\r\n",
-                                    remote_write_path,
-                                    destination,
-                                    data_size
-                    );
-
-                    len = buffer_strlen(http_request_header);
-                    send(sock, buffer_tostring(http_request_header), len, flags);
-
-                    len = data_size;
-                }
-#endif
-
-                ssize_t written;
-#ifdef ENABLE_HTTPS
-                if(opentsdb_ssl.conn && !opentsdb_ssl.flags) {
-                    written = SSL_write(opentsdb_ssl.conn, buffer_tostring(b), len);
-                } else {
-                    written = send(sock, buffer_tostring(b), len, flags);
-                }
-#else
-                written = send(sock, buffer_tostring(b), len, flags);
-#endif
-
-                // chart_backend_latency += now_monotonic_usec() - start_ut;
-                if(written != -1 && (size_t)written == len) {
-                    // we sent the data successfully
-                    chart_transmission_successes++;
-                    chart_sent_bytes += written;
-                    chart_sent_metrics = chart_buffered_metrics;
-
-                    // reset the failures count
-                    failures = 0;
-
-                    // empty the buffer
-                    buffer_flush(b);
-                }
-                else {
-                    // oops! we couldn't send (all or some of the) data
-                    error("BACKEND: failed to write data to database backend '%s'. Willing to write %zu bytes, wrote %zd bytes. Will re-connect.", destination, len, written);
-                    chart_transmission_failures++;
-
-                    if(written != -1)
-                        chart_sent_bytes += written;
-
-                    // increment the counter we check for data loss
-                    failures++;
-
-                    // close the socket - we will re-open it next time
-                    close(sock);
-                    sock = -1;
-                }
-            }
-            else {
-                error("BACKEND: failed to update database backend '%s'", destination);
-                chart_transmission_failures++;
-
-                // increment the counter we check for data loss
-                failures++;
-            }
-        }
-
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-        if(do_prometheus_remote_write && failures) {
-            (void) buffer_on_failures;
-            failures = 0;
-            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
-#endif
-        if(failures > buffer_on_failures) {
-            // too bad! we are going to lose data
-            chart_lost_bytes += buffer_strlen(b);
-            error("BACKEND: reached %d backend failures. Flushing buffers to protect this host - this results in data loss on back-end server '%s'", failures, destination);
-            buffer_flush(b);
-            failures = 0;
-            chart_data_lost_events++;
-            chart_lost_metrics = chart_buffered_metrics;
-        }
-
-        if(unlikely(netdata_exit)) break;
-
-        // ------------------------------------------------------------------------
-        // update the monitoring charts
-
-        if(likely(chart_ops->counter_done)) rrdset_next(chart_ops);
-        rrddim_set(chart_ops, "read",         chart_receptions);
-        rrddim_set(chart_ops, "write",        chart_transmission_successes);
-        rrddim_set(chart_ops, "discard",      chart_data_lost_events);
-        rrddim_set(chart_ops, "failure",      chart_transmission_failures);
-        rrddim_set(chart_ops, "reconnect",    chart_backend_reconnects);
-        rrdset_done(chart_ops);
-
-        if(likely(chart_metrics->counter_done)) rrdset_next(chart_metrics);
-        rrddim_set(chart_metrics, "buffered", chart_buffered_metrics);
-        rrddim_set(chart_metrics, "lost",     chart_lost_metrics);
-        rrddim_set(chart_metrics, "sent",     chart_sent_metrics);
-        rrdset_done(chart_metrics);
-
-        if(likely(chart_bytes->counter_done)) rrdset_next(chart_bytes);
-        rrddim_set(chart_bytes, "buffered",   chart_buffered_bytes);
-        rrddim_set(chart_bytes, "lost",       chart_lost_bytes);
-        rrddim_set(chart_bytes, "sent",       chart_sent_bytes);
-        rrddim_set(chart_bytes, "received",   chart_received_bytes);
-        rrdset_done(chart_bytes);
-
-        /*
-        if(likely(chart_latency->counter_done)) rrdset_next(chart_latency);
-        rrddim_set(chart_latency, "latency",  chart_backend_latency);
-        rrdset_done(chart_latency);
-        */
-
-        getrusage(RUSAGE_THREAD, &thread);
-        if(likely(chart_rusage->counter_done)) rrdset_next(chart_rusage);
-        rrddim_set(chart_rusage, "user",   thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
-        rrddim_set(chart_rusage, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
-        rrdset_done(chart_rusage);
-
-        if(likely(buffer_strlen(b) == 0))
-            chart_buffered_metrics = 0;
-
-        if(unlikely(netdata_exit)) break;
-    }
-
-cleanup:
-#if HAVE_KINESIS
-    if(do_kinesis) {
-        backends_kinesis_shutdown();
-        freez(kinesis_auth_key_id);
-        freez(kinesis_secure_key);
-        freez(kinesis_stream_name);
-    }
-#endif
-
-#if ENABLE_PROMETHEUS_REMOTE_WRITE
-    buffer_free(http_request_header);
-    if(do_prometheus_remote_write)
-        backends_protocol_buffers_shutdown();
-#endif
-
-#if HAVE_MONGOC
-    if(do_mongodb) {
-        backends_mongodb_cleanup();
-        freez(mongodb_uri);
-        freez(mongodb_database);
-        freez(mongodb_collection);
-    }
-#endif
-
-    if(sock != -1)
-        close(sock);
-
-    buffer_free(b);
-    buffer_free(response);
-
-#ifdef ENABLE_HTTPS
-    if(netdata_exporting_ctx) {
-        if(opentsdb_ssl.conn) {
-            SSL_free(opentsdb_ssl.conn);
-        }
-    }
-#endif
-
-    netdata_thread_cleanup_pop(1);
-    return NULL;
-}