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netdata/exporting/opentsdb/opentsdb.c

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// SPDX-License-Identifier: GPL-3.0-or-later
#include "opentsdb.h"
/**
* Initialize OpenTSDB connector
*
* @param instance a connector data structure.
* @return Always returns 0.
*/
int init_opentsdb_connector(struct connector *connector)
{
connector->worker = simple_connector_worker;
struct simple_connector_config *connector_specific_config = mallocz(sizeof(struct simple_connector_config));
connector->config.connector_specific_config = (void *)connector_specific_config;
connector_specific_config->default_port = 4242;
return 0;
}
/**
* Initialize OpenTSDB telnet connector instance
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_opentsdb_telnet_instance(struct instance *instance)
{
instance->start_batch_formatting = NULL;
instance->start_host_formatting = format_host_labels_opentsdb_telnet;
instance->start_chart_formatting = NULL;
if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
instance->metric_formatting = format_dimension_collected_opentsdb_telnet;
else
instance->metric_formatting = format_dimension_stored_opentsdb_telnet;
instance->end_chart_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = NULL;
instance->buffer = (void *)buffer_create(0);
if (!instance->buffer) {
error("EXPORTING: cannot create buffer for opentsdb telnet exporting connector instance %s", instance->config.name);
return 1;
}
uv_mutex_init(&instance->mutex);
uv_cond_init(&instance->cond_var);
return 0;
}
/**
* Initialize OpenTSDB HTTP connector instance
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_opentsdb_http_instance(struct instance *instance)
{
instance->start_batch_formatting = NULL;
instance->start_host_formatting = format_host_labels_opentsdb_http;
instance->start_chart_formatting = NULL;
if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
instance->metric_formatting = format_dimension_collected_opentsdb_http;
else
instance->metric_formatting = format_dimension_stored_opentsdb_http;
instance->end_chart_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = NULL;
instance->buffer = (void *)buffer_create(0);
if (!instance->buffer) {
error("EXPORTING: cannot create buffer for opentsdb HTTP exporting connector instance %s", instance->config.name);
return 1;
}
uv_mutex_init(&instance->mutex);
uv_cond_init(&instance->cond_var);
return 0;
}
/**
* Copy a label value and substitute underscores in place of charachters which can't be used in OpenTSDB output
*
* @param dst a destination string.
* @param src a source string.
* @param len the maximum number of characters copied.
*/
void sanitize_opentsdb_label_value(char *dst, char *src, size_t len)
{
while (*src != '\0' && len) {
if (isalpha(*src) || isdigit(*src) || *src == '-' || *src == '_' || *src == '.' || *src == '/' || IS_UTF8_BYTE(*src))
*dst++ = *src;
else
*dst++ = '_';
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_opentsdb_telnet(struct instance *instance, RRDHOST *host)
{
if (!instance->labels)
instance->labels = buffer_create(1024);
if (unlikely(!sending_labels_configured(instance)))
return 0;
netdata_rwlock_rdlock(&host->labels_rwlock);
for (struct label *label = host->labels; label; label = label->next) {
if (!should_send_label(instance, label))
continue;
char value[CONFIG_MAX_VALUE + 1];
sanitize_opentsdb_label_value(value, label->value, CONFIG_MAX_VALUE);
if (*value)
buffer_sprintf(instance->labels, " %s=%s", label->key, value);
}
netdata_rwlock_unlock(&host->labels_rwlock);
return 0;
}
/**
* Format dimension using collected data for OpenTSDB telnet connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_collected_opentsdb_telnet(struct instance *instance, RRDDIM *rd)
{
struct engine *engine = instance->connector->engine;
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,
"put %s.%s.%s %llu " COLLECTED_NUMBER_FORMAT " host=%s%s%s%s\n",
engine->config.prefix,
chart_name,
dimension_name,
(unsigned long long)rd->last_collected_time.tv_sec,
rd->last_collected_value,
engine->config.hostname,
(host->tags) ? " " : "",
(host->tags) ? host->tags : "",
(instance->labels) ? buffer_tostring(instance->labels) : "");
return 0;
}
/**
* Format dimension using a calculated value from stored data for OpenTSDB telnet connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_stored_opentsdb_telnet(struct instance *instance, RRDDIM *rd)
{
struct engine *engine = instance->connector->engine;
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,
"put %s.%s.%s %llu " CALCULATED_NUMBER_FORMAT " host=%s%s%s%s\n",
engine->config.prefix,
chart_name,
dimension_name,
(unsigned long long)last_t,
value,
engine->config.hostname,
(host->tags) ? " " : "",
(host->tags) ? host->tags : "",
(instance->labels) ? buffer_tostring(instance->labels) : "");
return 0;
}
/**
* Prepare an HTTP message for OpenTSDB HTTP connector
*
* @param buffer a buffer to write the message to.
* @param message the body of the message.
* @param hostname the name of the host that sends the message.
* @param length the length of the message body.
*/
static inline void opentsdb_build_message(BUFFER *buffer, char *message, const char *hostname, int length)
{
buffer_sprintf(
buffer,
"POST /api/put HTTP/1.1\r\n"
"Host: %s\r\n"
"Content-Type: application/json\r\n"
"Content-Length: %d\r\n"
"\r\n"
"%s",
hostname,
length,
message);
}
/**
* Format host labels for OpenTSDB HTTP connector
*
* @param instance an instance data structure.
* @param host a data collecting host.
* @return Always returns 0.
*/
int format_host_labels_opentsdb_http(struct instance *instance, RRDHOST *host)
{
if (!instance->labels)
instance->labels = buffer_create(1024);
if (unlikely(!sending_labels_configured(instance)))
return 0;
netdata_rwlock_rdlock(&host->labels_rwlock);
for (struct label *label = host->labels; label; label = label->next) {
if (!should_send_label(instance, label))
continue;
char escaped_value[CONFIG_MAX_VALUE * 2 + 1];
sanitize_json_string(escaped_value, label->value, CONFIG_MAX_VALUE);
char value[CONFIG_MAX_VALUE + 1];
sanitize_opentsdb_label_value(value, escaped_value, CONFIG_MAX_VALUE);
if (*value) {
buffer_strcat(instance->labels, ",");
buffer_sprintf(instance->labels, "\"%s\":\"%s\"", label->key, value);
}
}
netdata_rwlock_unlock(&host->labels_rwlock);
return 0;
}
/**
* Format dimension using collected data for OpenTSDB HTTP connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_collected_opentsdb_http(struct instance *instance, RRDDIM *rd)
{
struct engine *engine = instance->connector->engine;
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);
char message[1024];
int length = snprintfz(
message,
sizeof(message),
"{"
" \"metric\": \"%s.%s.%s\","
" \"timestamp\": %llu,"
" \"value\": " COLLECTED_NUMBER_FORMAT ","
" \"tags\": {"
" \"host\": \"%s%s%s\"%s"
" }"
"}",
engine->config.prefix,
chart_name,
dimension_name,
(unsigned long long)rd->last_collected_time.tv_sec,
rd->last_collected_value,
engine->config.hostname,
(host->tags) ? " " : "",
(host->tags) ? host->tags : "",
instance->labels ? buffer_tostring(instance->labels) : "");
if (length > 0) {
opentsdb_build_message(instance->buffer, message, engine->config.hostname, length);
}
return 0;
}
/**
* Format dimension using a calculated value from stored data for OpenTSDB HTTP connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_stored_opentsdb_http(struct instance *instance, RRDDIM *rd)
{
struct engine *engine = instance->connector->engine;
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;
char message[1024];
int length = snprintfz(
message,
sizeof(message),
"{"
" \"metric\": \"%s.%s.%s\","
" \"timestamp\": %llu,"
" \"value\": " CALCULATED_NUMBER_FORMAT ","
" \"tags\": {"
" \"host\": \"%s%s%s\"%s"
" }"
"}",
engine->config.prefix,
chart_name,
dimension_name,
(unsigned long long)last_t,
value,
engine->config.hostname,
(host->tags) ? " " : "",
(host->tags) ? host->tags : "",
instance->labels ? buffer_tostring(instance->labels) : "");
if (length > 0) {
opentsdb_build_message(instance->buffer, message, engine->config.hostname, length);
}
return 0;
}
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