Merging upstream version 1.45.3+dfsg.

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

1 files changed, 215 insertions, 0 deletions

diff --git a/src/exporting/graphite/graphite.c b/src/exporting/graphite/graphite.c
new file mode 100644
index 000000000..9edde4503
--- /dev/null
+++ b/src/exporting/graphite/graphite.c
@@ -0,0 +1,215 @@
+// 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->ssl = NETDATA_SSL_UNSET_CONNECTION;
+    if (instance->config.options & EXPORTING_OPTION_USE_TLS) {
+        netdata_ssl_initialize_ctx(NETDATA_SSL_EXPORTING_CTX);
+    }
+#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->variables_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, &netdata_buffers_statistics.buffers_exporters);
+    if (!instance->buffer) {
+        netdata_log_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 characters 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, const 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_buffer)
+        instance->labels_buffer = buffer_create(1024, &netdata_buffers_statistics.buffers_exporters);
+
+    if (unlikely(!sending_labels_configured(instance)))
+        return 0;
+
+    rrdlabels_to_buffer(host->rrdlabels, instance->labels_buffer, ";", "=", "", "",
+                        exporting_labels_filter_callback, instance,
+                        NULL, sanitize_graphite_label_value);
+
+    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) ? rrdset_name(st) : rrdset_id(st),
+        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) ? rrddim_name(rd) : rrddim_id(rd),
+        RRD_ID_LENGTH_MAX);
+
+    buffer_sprintf(
+        instance->buffer,
+        "%s.%s.%s.%s%s " COLLECTED_NUMBER_FORMAT " %llu\n",
+        instance->config.prefix,
+        (host == localhost) ? instance->config.hostname : rrdhost_hostname(host),
+        chart_name,
+        dimension_name,
+        (instance->labels_buffer) ? buffer_tostring(instance->labels_buffer) : "",
+        rd->collector.last_collected_value,
+        (unsigned long long)rd->collector.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) ? rrdset_name(st) : rrdset_id(st),
+        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) ? rrddim_name(rd) : rrddim_id(rd),
+        RRD_ID_LENGTH_MAX);
+
+    time_t last_t;
+    NETDATA_DOUBLE 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 " NETDATA_DOUBLE_FORMAT " %llu\n",
+        instance->config.prefix,
+        (host == localhost) ? instance->config.hostname : rrdhost_hostname(host),
+        chart_name,
+        dimension_name,
+        (instance->labels_buffer) ? buffer_tostring(instance->labels_buffer) : "",
+        value,
+        (unsigned long long)last_t);
+
+    return 0;
+}
+
+/**
+ * Prepare 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"
+        "%s"
+        "Content-Type: application/graphite\r\n"
+        "Content-Length: %lu\r\n"
+        "\r\n",
+        instance->config.destination,
+        simple_connector_data->auth_string ? simple_connector_data->auth_string : "",
+        (unsigned long int) buffer_strlen(simple_connector_data->last_buffer->buffer));
+
+    return;
+}