248 lines
6.8 KiB
C
248 lines
6.8 KiB
C
|
|
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 2019 Sangoma, Inc.
|
|
*
|
|
* Matt Jordan <mjordan@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*!
|
|
* \file
|
|
* \brief Prometheus Channel Metrics
|
|
*
|
|
* \author Matt Jordan <mjordan@digium.com>
|
|
*
|
|
*/
|
|
|
|
#include "asterisk.h"
|
|
#include "asterisk/res_prometheus.h"
|
|
#include "asterisk/stasis_channels.h"
|
|
#include "asterisk/pbx.h"
|
|
#include "prometheus_internal.h"
|
|
|
|
#define CHANNELS_STATE_HELP "Individual channel states. 0=down; 1=reserved; 2=offhook; 3=dialing; 4=ring; 5=ringing; 6=up; 7=busy; 8=dialing_offhook; 9=prering."
|
|
|
|
#define CHANNELS_DURATION_HELP "Individual channel durations (in seconds)."
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Callback function to get a channel's current state
|
|
*
|
|
* \param metric The metric to populate
|
|
* \param snapshot Channel snapshot
|
|
*/
|
|
static void get_channel_state(struct prometheus_metric *metric, struct ast_channel_snapshot *snapshot)
|
|
{
|
|
snprintf(metric->value, sizeof(metric->value), "%d", snapshot->state);
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Callback function to get a channel's current duration
|
|
*
|
|
* \param metric The metric to populate
|
|
* \param snapshot Channel snapshot
|
|
*/
|
|
static void get_channel_duration(struct prometheus_metric *metric, struct ast_channel_snapshot *snapshot)
|
|
{
|
|
struct timeval now = ast_tvnow();
|
|
int64_t duration = ast_tvdiff_sec(now, snapshot->base->creationtime);
|
|
|
|
snprintf(metric->value, sizeof(metric->value), "%" PRIu64, duration);
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Helper struct for generating individual channel stats
|
|
*/
|
|
struct channel_metric_defs {
|
|
/*!
|
|
* \brief Help text to display
|
|
*/
|
|
const char *help;
|
|
/*!
|
|
* \brief Name of the metric
|
|
*/
|
|
const char *name;
|
|
/*!
|
|
* \brief Callback function to generate a metric value for a given channel
|
|
*/
|
|
void (* const get_value)(struct prometheus_metric *metric, struct ast_channel_snapshot *snapshot);
|
|
} channel_metric_defs[] = {
|
|
{
|
|
.help = CHANNELS_STATE_HELP,
|
|
.name = "asterisk_channels_state",
|
|
.get_value = get_channel_state,
|
|
},
|
|
{
|
|
.help = CHANNELS_DURATION_HELP,
|
|
.name = "asterisk_channels_duration_seconds",
|
|
.get_value = get_channel_duration,
|
|
},
|
|
};
|
|
|
|
static void get_total_call_count(struct prometheus_metric *metric)
|
|
{
|
|
snprintf(metric->value, sizeof(metric->value), "%d", ast_processed_calls());
|
|
}
|
|
|
|
static void get_current_call_count(struct prometheus_metric *metric)
|
|
{
|
|
snprintf(metric->value, sizeof(metric->value), "%d", ast_active_calls());
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Channel based metrics that are always available
|
|
*/
|
|
static struct prometheus_metric global_channel_metrics[] = {
|
|
PROMETHEUS_METRIC_STATIC_INITIALIZATION(
|
|
PROMETHEUS_METRIC_COUNTER,
|
|
"asterisk_calls_sum",
|
|
"Total call count.",
|
|
&get_total_call_count
|
|
),
|
|
PROMETHEUS_METRIC_STATIC_INITIALIZATION(
|
|
PROMETHEUS_METRIC_GAUGE,
|
|
"asterisk_calls_count",
|
|
"Current call count.",
|
|
&get_current_call_count
|
|
),
|
|
};
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Callback invoked when Prometheus scrapes the server
|
|
*
|
|
* \param response The response to populate with formatted metrics
|
|
*/
|
|
static void channels_scrape_cb(struct ast_str **response)
|
|
{
|
|
struct ao2_container *channel_cache;
|
|
struct ao2_container *channels;
|
|
struct ao2_iterator it_chans;
|
|
struct ast_channel_snapshot *snapshot;
|
|
struct prometheus_metric *channel_metrics;
|
|
char eid_str[32];
|
|
int num_channels;
|
|
int i, j;
|
|
struct prometheus_metric channel_count = PROMETHEUS_METRIC_STATIC_INITIALIZATION(
|
|
PROMETHEUS_METRIC_GAUGE,
|
|
"asterisk_channels_count",
|
|
"Current channel count.",
|
|
NULL
|
|
);
|
|
|
|
ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default);
|
|
|
|
channel_cache = ast_channel_cache_all();
|
|
if (!channel_cache) {
|
|
return;
|
|
}
|
|
|
|
channels = ao2_container_clone(channel_cache, 0);
|
|
ao2_ref(channel_cache, -1);
|
|
if (!channels) {
|
|
return;
|
|
}
|
|
|
|
num_channels = ao2_container_count(channels);
|
|
|
|
/* Channel count */
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_count, 0, "eid", eid_str);
|
|
snprintf(channel_count.value, sizeof(channel_count.value), "%d", num_channels);
|
|
prometheus_metric_to_string(&channel_count, response);
|
|
|
|
/* Global call values */
|
|
for (i = 0; i < ARRAY_LEN(global_channel_metrics); i++) {
|
|
PROMETHEUS_METRIC_SET_LABEL(&global_channel_metrics[i], 0, "eid", eid_str);
|
|
global_channel_metrics[i].get_metric_value(&global_channel_metrics[i]);
|
|
prometheus_metric_to_string(&global_channel_metrics[i], response);
|
|
}
|
|
|
|
if (num_channels == 0) {
|
|
ao2_ref(channels, -1);
|
|
return;
|
|
}
|
|
|
|
/* Channel dependent values */
|
|
channel_metrics = ast_calloc(ARRAY_LEN(channel_metric_defs) * num_channels, sizeof(*channel_metrics));
|
|
if (!channel_metrics) {
|
|
ao2_ref(channels, -1);
|
|
return;
|
|
}
|
|
|
|
it_chans = ao2_iterator_init(channels, 0);
|
|
for (i = 0; (snapshot = ao2_iterator_next(&it_chans)); ao2_ref(snapshot, -1), i++) {
|
|
for (j = 0; j < ARRAY_LEN(channel_metric_defs); j++) {
|
|
int index = i * ARRAY_LEN(channel_metric_defs) + j;
|
|
|
|
channel_metrics[index].type = PROMETHEUS_METRIC_GAUGE;
|
|
ast_copy_string(channel_metrics[index].name, channel_metric_defs[j].name, sizeof(channel_metrics[index].name));
|
|
channel_metrics[index].help = channel_metric_defs[j].help;
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_metrics[index], 0, "eid", eid_str);
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_metrics[index], 1, "name", (snapshot->base->name));
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_metrics[index], 2, "id", (snapshot->base->uniqueid));
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_metrics[index], 3, "type", (snapshot->base->type));
|
|
if (snapshot->peer) {
|
|
PROMETHEUS_METRIC_SET_LABEL(&channel_metrics[index], 4, "linkedid", (snapshot->peer->linkedid));
|
|
}
|
|
channel_metric_defs[j].get_value(&channel_metrics[index], snapshot);
|
|
|
|
if (i > 0) {
|
|
AST_LIST_INSERT_TAIL(&channel_metrics[j].children, &channel_metrics[index], entry);
|
|
}
|
|
}
|
|
}
|
|
ao2_iterator_destroy(&it_chans);
|
|
|
|
for (j = 0; j < ARRAY_LEN(channel_metric_defs); j++) {
|
|
prometheus_metric_to_string(&channel_metrics[j], response);
|
|
}
|
|
|
|
ast_free(channel_metrics);
|
|
ao2_ref(channels, -1);
|
|
}
|
|
|
|
struct prometheus_callback channels_callback = {
|
|
.name = "Channels callback",
|
|
.callback_fn = channels_scrape_cb,
|
|
};
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Callback invoked when the core module is unloaded
|
|
*/
|
|
static void channel_metrics_unload_cb(void)
|
|
{
|
|
prometheus_callback_unregister(&channels_callback);
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Metrics provider definition
|
|
*/
|
|
static struct prometheus_metrics_provider provider = {
|
|
.name = "channels",
|
|
.unload_cb = channel_metrics_unload_cb,
|
|
};
|
|
|
|
int channel_metrics_init(void)
|
|
{
|
|
prometheus_metrics_provider_register(&provider);
|
|
prometheus_callback_register(&channels_callback);
|
|
|
|
return 0;
|
|
}
|