src/exporting/init_connectors.c
// SPDX-License-Identifier: GPL-3.0-or-later
#include "exporting_engine.h"
#include "graphite/graphite.h"
#include "json/json.h"
#include "opentsdb/opentsdb.h"
#ifdef ENABLE_PROMETHEUS_REMOTE_WRITE
#include "prometheus/remote_write/remote_write.h"
#endif
#if HAVE_KINESIS
#include "aws_kinesis/aws_kinesis.h"
#endif
#ifdef ENABLE_EXPORTING_PUBSUB
#include "pubsub/pubsub.h"
#endif
#ifdef HAVE_MONGOC
#include "mongodb/mongodb.h"
#endif
/**
* Initialize connectors
*
* @param engine an engine data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_connectors(struct engine *engine)
{
engine->now = now_realtime_sec();
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
instance->index = engine->instance_num++;
instance->after = engine->now;
switch (instance->config.type) {
case EXPORTING_CONNECTOR_TYPE_GRAPHITE:
if (init_graphite_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_GRAPHITE_HTTP:
if (init_graphite_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_JSON:
if (init_json_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_JSON_HTTP:
if (init_json_http_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_OPENTSDB:
if (init_opentsdb_telnet_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_OPENTSDB_HTTP:
if (init_opentsdb_http_instance(instance) != 0)
return 1;
break;
case EXPORTING_CONNECTOR_TYPE_PROMETHEUS_REMOTE_WRITE:
#ifdef ENABLE_PROMETHEUS_REMOTE_WRITE
if (init_prometheus_remote_write_instance(instance) != 0)
return 1;
#endif
break;
case EXPORTING_CONNECTOR_TYPE_KINESIS:
#if HAVE_KINESIS
if (init_aws_kinesis_instance(instance) != 0)
return 1;
#endif
break;
case EXPORTING_CONNECTOR_TYPE_PUBSUB:
#if ENABLE_EXPORTING_PUBSUB
if (init_pubsub_instance(instance) != 0)
return 1;
#endif
break;
case EXPORTING_CONNECTOR_TYPE_MONGODB:
#ifdef HAVE_MONGOC
if (init_mongodb_instance(instance) != 0)
return 1;
#endif
break;
default:
netdata_log_error("EXPORTING: unknown exporting connector type");
return 1;
}
// dispatch the instance worker thread
int error = uv_thread_create(&instance->thread, instance->worker, instance);
if (error) {
netdata_log_error("EXPORTING: cannot create thread worker. uv_thread_create(): %s", uv_strerror(error));
return 1;
}
analytics_statistic_t statistic = { "EXPORTING_START", "OK", instance->config.type_name };
analytics_statistic_send(&statistic);
}
return 0;
}
// TODO: use a base64 encoder from a library
static size_t base64_encode(unsigned char *input, size_t input_size, char *output, size_t output_size)
{
uint32_t value;
static char lookup[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
if ((input_size / 3 + 1) * 4 >= output_size) {
netdata_log_error("Output buffer for encoding size=%zu is not large enough for %zu-bytes input", output_size, input_size);
return 0;
}
size_t count = 0;
while (input_size >= 3) {
value = ((input[0] << 16) + (input[1] << 8) + input[2]) & 0xffffff;
output[0] = lookup[value >> 18];
output[1] = lookup[(value >> 12) & 0x3f];
output[2] = lookup[(value >> 6) & 0x3f];
output[3] = lookup[value & 0x3f];
//netdata_log_error("Base-64 encode (%04x) -> %c %c %c %c\n", value, output[0], output[1], output[2], output[3]);
output += 4;
input += 3;
input_size -= 3;
count += 4;
}
switch (input_size) {
case 2:
value = (input[0] << 10) + (input[1] << 2);
output[0] = lookup[(value >> 12) & 0x3f];
output[1] = lookup[(value >> 6) & 0x3f];
output[2] = lookup[value & 0x3f];
output[3] = '=';
//netdata_log_error("Base-64 encode (%06x) -> %c %c %c %c\n", (value>>2)&0xffff, output[0], output[1], output[2], output[3]);
count += 4;
output[4] = '\0';
break;
case 1:
value = input[0] << 4;
output[0] = lookup[(value >> 6) & 0x3f];
output[1] = lookup[value & 0x3f];
output[2] = '=';
output[3] = '=';
//netdata_log_error("Base-64 encode (%06x) -> %c %c %c %c\n", value, output[0], output[1], output[2], output[3]);
count += 4;
output[4] = '\0';
break;
case 0:
output[0] = '\0';
break;
}
return count;
}
/**
* Initialize a ring buffer and credentials for a simple connector
*
* @param instance an instance data structure.
*/
void simple_connector_init(struct instance *instance)
{
struct simple_connector_data *connector_specific_data =
(struct simple_connector_data *)instance->connector_specific_data;
if (connector_specific_data->first_buffer)
return;
connector_specific_data->header = buffer_create(0, &netdata_buffers_statistics.buffers_exporters);
connector_specific_data->buffer = buffer_create(0, &netdata_buffers_statistics.buffers_exporters);
// create a ring buffer
struct simple_connector_buffer *first_buffer = NULL;
if (instance->config.buffer_on_failures < 1)
instance->config.buffer_on_failures = 1;
for (int i = 0; i < instance->config.buffer_on_failures; i++) {
struct simple_connector_buffer *current_buffer = callocz(1, sizeof(struct simple_connector_buffer));
if (!connector_specific_data->first_buffer)
first_buffer = current_buffer;
else
current_buffer->next = connector_specific_data->first_buffer;
connector_specific_data->first_buffer = current_buffer;
}
first_buffer->next = connector_specific_data->first_buffer;
connector_specific_data->last_buffer = connector_specific_data->first_buffer;
if (*instance->config.username || *instance->config.password) {
BUFFER *auth_string = buffer_create(0, &netdata_buffers_statistics.buffers_exporters);
buffer_sprintf(auth_string, "%s:%s", instance->config.username, instance->config.password);
size_t encoded_size = (buffer_strlen(auth_string) / 3 + 1) * 4 + 1;
char *encoded_credentials = callocz(1, encoded_size);
base64_encode((unsigned char*)buffer_tostring(auth_string), buffer_strlen(auth_string), encoded_credentials, encoded_size);
buffer_flush(auth_string);
buffer_sprintf(auth_string, "Authorization: Basic %s\n", encoded_credentials);
freez(encoded_credentials);
connector_specific_data->auth_string = strdupz(buffer_tostring(auth_string));
buffer_free(auth_string);
}
return;
}