Merging upstream version 1.29.0.

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

4 files changed, 280 insertions, 0 deletions

diff --git a/exporting/graphite/Makefile.am b/exporting/graphite/Makefile.am
new file mode 100644
index 000000000..babdcf0df
--- /dev/null
+++ b/exporting/graphite/Makefile.am
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
diff --git a/exporting/graphite/README.md b/exporting/graphite/README.md
new file mode 100644
index 000000000..a6a25ef7a
--- /dev/null
+++ b/exporting/graphite/README.md
@@ -0,0 +1,30 @@
+<!--
+title: "Export metrics to Graphite providers"
+description: "Archive your Agent's metrics to a any Graphite database provider for long-term storage, further analysis, or correlation with data from other sources."
+custom_edit_url: https://github.com/netdata/netdata/edit/master/exporting/graphite/README.md
+sidebar_label: Graphite
+-->
+
+# Export metrics to Graphite providers
+
+You can use the Graphite connector for the [exporting engine](/exporting/README.md) to archive your agent's metrics to
+Graphite providers for long-term storage, further analysis, or correlation with data from other sources.
+
+## Configuration
+
+To enable data exporting to a Graphite database, run `./edit-config exporting.conf` in the Netdata configuration
+directory and set the following options:
+
+```conf
+[graphite:my_graphite_instance]
+    enabled = yes
+    destination = localhost:2003
+```
+
+Add `:http` or `:https` modifiers to the connector type if you need to use other than a plaintext protocol. For example: `graphite:http:my_graphite_instance`,
+`graphite:https:my_graphite_instance`.
+
+The Graphite connector is further configurable using additional settings. See the [exporting reference
+doc](/exporting/README.md#options) for details.
+
+[![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%2Fexporting%2Fjson%2FREADME&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)
diff --git a/exporting/graphite/graphite.c b/exporting/graphite/graphite.c
new file mode 100644
index 000000000..9c09631f1
--- /dev/null
+++ b/exporting/graphite/graphite.c
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "graphite.h"
+
+/**
+ * Initialize Graphite connector instance
+ *
+ * @param instance an instance data structure.
+ * @return Returns 0 on success, 1 on failure.
+ */
+int init_graphite_instance(struct instance *instance)
+{
+    instance->worker = simple_connector_worker;
+
+    struct simple_connector_config *connector_specific_config = callocz(1, sizeof(struct simple_connector_config));
+    instance->config.connector_specific_config = (void *)connector_specific_config;
+    connector_specific_config->default_port = 2003;
+
+    struct simple_connector_data *connector_specific_data = callocz(1, sizeof(struct simple_connector_data));
+    instance->connector_specific_data = connector_specific_data;
+
+#ifdef ENABLE_HTTPS
+    connector_specific_data->flags = NETDATA_SSL_START;
+    connector_specific_data->conn = NULL;
+    if (instance->config.options & EXPORTING_OPTION_USE_TLS) {
+        security_start_ssl(NETDATA_SSL_CONTEXT_EXPORTING);
+    }
+#endif
+
+    instance->start_batch_formatting = NULL;
+    instance->start_host_formatting = format_host_labels_graphite_plaintext;
+    instance->start_chart_formatting = NULL;
+
+    if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
+        instance->metric_formatting = format_dimension_collected_graphite_plaintext;
+    else
+        instance->metric_formatting = format_dimension_stored_graphite_plaintext;
+
+    instance->end_chart_formatting = NULL;
+    instance->end_host_formatting = flush_host_labels;
+    instance->end_batch_formatting = simple_connector_end_batch;
+
+    if (instance->config.type == EXPORTING_CONNECTOR_TYPE_GRAPHITE_HTTP)
+        instance->prepare_header = graphite_http_prepare_header;
+    else
+        instance->prepare_header = NULL;
+
+    instance->check_response = exporting_discard_response;
+
+    instance->buffer = (void *)buffer_create(0);
+    if (!instance->buffer) {
+        error("EXPORTING: cannot create buffer for graphite exporting connector instance %s", instance->config.name);
+        return 1;
+    }
+
+    simple_connector_init(instance);
+
+    if (uv_mutex_init(&instance->mutex))
+        return 1;
+    if (uv_cond_init(&instance->cond_var))
+        return 1;
+
+    return 0;
+}
+
+/**
+ * Copy a label value and substitute underscores in place of charachters which can't be used in Graphite output
+ *
+ * @param dst a destination string.
+ * @param src a source string.
+ * @param len the maximum number of characters copied.
+ */
+
+void sanitize_graphite_label_value(char *dst, char *src, size_t len)
+{
+    while (*src != '\0' && len) {
+        if (isspace(*src) || *src == ';' || *src == '~')
+            *dst++ = '_';
+        else
+            *dst++ = *src;
+        src++;
+        len--;
+    }
+    *dst = '\0';
+}
+
+/**
+ * Format host labels for JSON connector
+ *
+ * @param instance an instance data structure.
+ * @param host a data collecting host.
+ * @return Always returns 0.
+ */
+int format_host_labels_graphite_plaintext(struct instance *instance, RRDHOST *host)
+{
+    if (!instance->labels)
+        instance->labels = buffer_create(1024);
+
+    if (unlikely(!sending_labels_configured(instance)))
+        return 0;
+
+    rrdhost_check_rdlock(host);
+    netdata_rwlock_rdlock(&host->labels.labels_rwlock);
+    for (struct label *label = host->labels.head; label; label = label->next) {
+        if (!should_send_label(instance, label))
+            continue;
+
+        char value[CONFIG_MAX_VALUE + 1];
+        sanitize_graphite_label_value(value, label->value, CONFIG_MAX_VALUE);
+
+        if (*value) {
+            buffer_strcat(instance->labels, ";");
+            buffer_sprintf(instance->labels, "%s=%s", label->key, value);
+        }
+    }
+    netdata_rwlock_unlock(&host->labels.labels_rwlock);
+
+    return 0;
+}
+
+/**
+ * Format dimension using collected data for Graphite connector
+ *
+ * @param instance an instance data structure.
+ * @param rd a dimension.
+ * @return Always returns 0.
+ */
+int format_dimension_collected_graphite_plaintext(struct instance *instance, RRDDIM *rd)
+{
+    RRDSET *st = rd->rrdset;
+    RRDHOST *host = st->rrdhost;
+
+    char chart_name[RRD_ID_LENGTH_MAX + 1];
+    exporting_name_copy(
+        chart_name,
+        (instance->config.options & EXPORTING_OPTION_SEND_NAMES && st->name) ? st->name : st->id,
+        RRD_ID_LENGTH_MAX);
+
+    char dimension_name[RRD_ID_LENGTH_MAX + 1];
+    exporting_name_copy(
+        dimension_name,
+        (instance->config.options & EXPORTING_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id,
+        RRD_ID_LENGTH_MAX);
+
+    buffer_sprintf(
+        instance->buffer,
+        "%s.%s.%s.%s%s%s%s " COLLECTED_NUMBER_FORMAT " %llu\n",
+        instance->config.prefix,
+        (host == localhost) ? instance->config.hostname : host->hostname,
+        chart_name,
+        dimension_name,
+        (host->tags) ? ";" : "",
+        (host->tags) ? host->tags : "",
+        (instance->labels) ? buffer_tostring(instance->labels) : "",
+        rd->last_collected_value,
+        (unsigned long long)rd->last_collected_time.tv_sec);
+
+    return 0;
+}
+
+/**
+ * Format dimension using a calculated value from stored data for Graphite connector
+ *
+ * @param instance an instance data structure.
+ * @param rd a dimension.
+ * @return Always returns 0.
+ */
+int format_dimension_stored_graphite_plaintext(struct instance *instance, RRDDIM *rd)
+{
+    RRDSET *st = rd->rrdset;
+    RRDHOST *host = st->rrdhost;
+
+    char chart_name[RRD_ID_LENGTH_MAX + 1];
+    exporting_name_copy(
+        chart_name,
+        (instance->config.options & EXPORTING_OPTION_SEND_NAMES && st->name) ? st->name : st->id,
+        RRD_ID_LENGTH_MAX);
+
+    char dimension_name[RRD_ID_LENGTH_MAX + 1];
+    exporting_name_copy(
+        dimension_name,
+        (instance->config.options & EXPORTING_OPTION_SEND_NAMES && rd->name) ? rd->name : rd->id,
+        RRD_ID_LENGTH_MAX);
+
+    time_t last_t;
+    calculated_number value = exporting_calculate_value_from_stored_data(instance, rd, &last_t);
+
+    if(isnan(value))
+        return 0;
+
+    buffer_sprintf(
+        instance->buffer,
+        "%s.%s.%s.%s%s%s%s " CALCULATED_NUMBER_FORMAT " %llu\n",
+        instance->config.prefix,
+        (host == localhost) ? instance->config.hostname : host->hostname,
+        chart_name,
+        dimension_name,
+        (host->tags) ? ";" : "",
+        (host->tags) ? host->tags : "",
+        (instance->labels) ? buffer_tostring(instance->labels) : "",
+        value,
+        (unsigned long long)last_t);
+
+    return 0;
+}
+
+/**
+ * Ppepare HTTP header
+ *
+ * @param instance an instance data structure.
+ * @return Returns 0 on success, 1 on failure.
+ */
+void graphite_http_prepare_header(struct instance *instance)
+{
+    struct simple_connector_data *simple_connector_data = instance->connector_specific_data;
+
+    buffer_sprintf(
+        simple_connector_data->last_buffer->header,
+        "POST /api/put HTTP/1.1\r\n"
+        "Host: %s\r\n"
+        "Content-Type: application/graphite\r\n"
+        "Content-Length: %lu\r\n"
+        "\r\n",
+        instance->config.destination,
+        buffer_strlen(simple_connector_data->last_buffer->buffer));
+
+    return;
+}
diff --git a/exporting/graphite/graphite.h b/exporting/graphite/graphite.h
new file mode 100644
index 000000000..993c12e57
--- /dev/null
+++ b/exporting/graphite/graphite.h
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_EXPORTING_GRAPHITE_H
+#define NETDATA_EXPORTING_GRAPHITE_H
+
+#include "exporting/exporting_engine.h"
+
+int init_graphite_instance(struct instance *instance);
+
+void sanitize_graphite_label_value(char *dst, char *src, size_t len);
+int format_host_labels_graphite_plaintext(struct instance *instance, RRDHOST *host);
+
+int format_dimension_collected_graphite_plaintext(struct instance *instance, RRDDIM *rd);
+int format_dimension_stored_graphite_plaintext(struct instance *instance, RRDDIM *rd);
+
+void graphite_http_prepare_header(struct instance *instance);
+
+#endif //NETDATA_EXPORTING_GRAPHITE_H