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// 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->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);
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 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);
if (unlikely(!sending_labels_configured(instance)))
return 0;
rrdlabels_to_buffer(host->host_labels, 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) ? 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) ? buffer_tostring(instance->labels_buffer) : "",
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;
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%s%s " NETDATA_DOUBLE_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) ? 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 : "",
buffer_strlen(simple_connector_data->last_buffer->buffer));
return;
}
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