channels.c File Reference

Prometheus Channel Metrics. More...

#include "asterisk.h"
#include "asterisk/res_prometheus.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/pbx.h"
#include "prometheus_internal.h"

Include dependency graph for channels.c:

Go to the source code of this file.

Data Structures
struct	channel_metric_defs

Macros
#define	CHANNELS_DURATION_HELP   "Individual channel durations (in seconds)."
#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."

Functions
int	channel_metrics_init (void)
	Initialize channel metrics. More...
static void	channel_metrics_unload_cb (void)
static void	channels_scrape_cb (struct ast_str **response)
static void	get_channel_duration (struct prometheus_metric *metric, struct ast_channel_snapshot *snapshot)
static void	get_channel_state (struct prometheus_metric *metric, struct ast_channel_snapshot *snapshot)
static void	get_current_call_count (struct prometheus_metric *metric)
static void	get_total_call_count (struct prometheus_metric *metric)

Variables
struct channel_metric_defs	channel_metric_defs []
struct prometheus_callback	channels_callback
static struct prometheus_metric	global_channel_metrics []
static struct prometheus_metrics_provider	provider

Detailed Description

Prometheus Channel Metrics.

Author

Matt Jordan mjord.nosp@m.an@d.nosp@m.igium.nosp@m..com

Definition in file channels.c.

Macro Definition Documentation

CHANNELS_DURATION_HELP

#define CHANNELS_DURATION_HELP   "Individual channel durations (in seconds)."

Definition at line 36 of file channels.c.

CHANNELS_STATE_HELP

#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."

Definition at line 34 of file channels.c.

Function Documentation

channel_metrics_init()

int channel_metrics_init

(

void

)

Initialize channel metrics.

Return values

0	success
-1	error

Definition at line 241 of file channels.c.

{
    prometheus_metrics_provider_register(&provider);
    prometheus_callback_register(&channels_callback);
 
    return 0;
}

References channels_callback, prometheus_callback_register(), prometheus_metrics_provider_register(), and provider.

Referenced by load_module().

channel_metrics_unload_cb()

static void channel_metrics_unload_cb ( void  )

static

Definition at line 227 of file channels.c.

{
    prometheus_callback_unregister(&channels_callback);
}

References channels_callback, and prometheus_callback_unregister().

channels_scrape_cb()

static void channels_scrape_cb ( struct ast_str **  response )

static

Definition at line 130 of file channels.c.

{
    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);
}

References ao2_container_clone, ao2_container_count(), ao2_iterator_destroy(), ao2_iterator_init(), ao2_iterator_next, ao2_ref, ARRAY_LEN, ast_calloc, ast_channel_cache_all(), ast_copy_string(), ast_eid_default, ast_eid_to_str(), ast_free, AST_LIST_INSERT_TAIL, ast_channel_snapshot::base, channel_cache, channels, prometheus_metric::children, prometheus_metric::get_metric_value, channel_metric_defs::get_value, global_channel_metrics, prometheus_metric::help, channel_metric_defs::help, ast_channel_snapshot_peer::linkedid, name, ast_channel_snapshot_base::name, NULL, ast_channel_snapshot::peer, PROMETHEUS_METRIC_GAUGE, PROMETHEUS_METRIC_SET_LABEL, PROMETHEUS_METRIC_STATIC_INITIALIZATION, prometheus_metric_to_string(), prometheus_metric::type, ast_channel_snapshot_base::type, ast_channel_snapshot_base::uniqueid, and prometheus_metric::value.

get_channel_duration()

static void get_channel_duration ( struct prometheus_metric *  metric, struct ast_channel_snapshot *  snapshot  )

static

Definition at line 57 of file channels.c.

{
    struct timeval now = ast_tvnow();
    int64_t duration = ast_tvdiff_sec(now, snapshot->base->creationtime);
 
    snprintf(metric->value, sizeof(metric->value), "%" PRIu64, duration);
}

References ast_tvdiff_sec(), ast_tvnow(), ast_channel_snapshot::base, ast_channel_snapshot_base::creationtime, and prometheus_metric::value.

get_channel_state()

static void get_channel_state ( struct prometheus_metric *  metric, struct ast_channel_snapshot *  snapshot  )

static

Definition at line 45 of file channels.c.

{
    snprintf(metric->value, sizeof(metric->value), "%d", snapshot->state);
}

References ast_channel_snapshot::state, and prometheus_metric::value.

get_current_call_count()

static void get_current_call_count ( struct prometheus_metric *  metric )

static

Definition at line 100 of file channels.c.

{
    snprintf(metric->value, sizeof(metric->value), "%d", ast_active_calls());
}

References ast_active_calls(), and prometheus_metric::value.

get_total_call_count()

static void get_total_call_count ( struct prometheus_metric *  metric )

static

Definition at line 95 of file channels.c.

{
    snprintf(metric->value, sizeof(metric->value), "%d", ast_processed_calls());
}

References ast_processed_calls(), and prometheus_metric::value.

Variable Documentation

channel_metric_defs

struct channel_metric_defs channel_metric_defs[]

channels_callback

struct prometheus_callback channels_callback

Initial value:

= {
    .name = "Channels callback",
    .callback_fn = channels_scrape_cb,
}

Definition at line 218 of file channels.c.

Referenced by channel_metrics_init(), and channel_metrics_unload_cb().

global_channel_metrics

struct prometheus_metric global_channel_metrics[]

static

Definition at line 109 of file channels.c.

Referenced by channels_scrape_cb().

provider

struct prometheus_metrics_provider provider

static

Initial value:

= {
    .name = "channels",
    .unload_cb = channel_metrics_unload_cb,
}

Definition at line 236 of file channels.c.

Referenced by channel_metrics_init().