bridges.c File Reference

Prometheus Bridge Metrics. More...

#include "asterisk.h"
#include "asterisk/stasis_bridges.h"
#include "asterisk/res_prometheus.h"
#include "prometheus_internal.h"

Include dependency graph for bridges.c:

Go to the source code of this file.

Data Structures
struct	bridge_metric_defs

Macros
#define	BRIDGES_CHANNELS_COUNT_HELP   "Number of channels in the bridge."

Functions
int	bridge_metrics_init (void)
	Initialize bridge metrics.
static void	bridge_metrics_unload_cb (void)
static void	bridges_scrape_cb (struct ast_str **response)
static void	get_bridge_channel_count (struct prometheus_metric *metric, struct ast_bridge_snapshot *snapshot)

Variables
struct bridge_metric_defs	bridge_metric_defs []
struct prometheus_callback	bridges_callback
static struct prometheus_metrics_provider	provider

Detailed Description

Prometheus Bridge Metrics.

Author

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

Definition in file bridges.c.

Macro Definition Documentation

BRIDGES_CHANNELS_COUNT_HELP

#define BRIDGES_CHANNELS_COUNT_HELP   "Number of channels in the bridge."

Definition at line 33 of file bridges.c.

Function Documentation

bridge_metrics_init()

int bridge_metrics_init

(

void

)

Initialize bridge metrics.

Return values

0	success
-1	error

Definition at line 206 of file bridges.c.

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

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

Referenced by load_module().

bridge_metrics_unload_cb()

static void bridge_metrics_unload_cb ( void  )

static

Definition at line 192 of file bridges.c.

{
    prometheus_callback_unregister(&bridges_callback);
}

References bridges_callback, and prometheus_callback_unregister().

bridges_scrape_cb()

static void bridges_scrape_cb ( struct ast_str **  response )

static

Definition at line 78 of file bridges.c.

{
    struct ao2_container *bridge_cache;
    struct ao2_container *bridges;
    struct ao2_iterator it_bridges;
    struct ast_bridge *bridge;
    struct prometheus_metric *metrics;
    struct prometheus_metric **bridge_metrics;
    char eid_str[32];
    int i, j, num_bridges, num_outputs = 0;
    struct prometheus_metric bridge_count = PROMETHEUS_METRIC_STATIC_INITIALIZATION(
        PROMETHEUS_METRIC_GAUGE,
        "asterisk_bridges_count",
        "Current bridge count.",
        NULL
    );
 
    ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default);
 
    bridge_cache = ast_bridges();
    if (!bridge_cache) {
        return;
    }
 
    bridges = ao2_container_clone(bridge_cache, 0);
    ao2_ref(bridge_cache, -1);
    if (!bridges) {
        return;
    }
 
    num_bridges = ao2_container_count(bridges);
 
    /* Current endpoint count */
    PROMETHEUS_METRIC_SET_LABEL(&bridge_count, 0, "eid", eid_str);
    snprintf(bridge_count.value, sizeof(bridge_count.value), "%d", num_bridges);
    prometheus_metric_to_string(&bridge_count, response);
 
    if (num_bridges == 0) {
        ao2_ref(bridges, -1);
        return;
    }
 
    metrics = ast_calloc(ARRAY_LEN(bridge_metric_defs) * num_bridges, sizeof(*metrics));
    if (!metrics) {
        ao2_ref(bridges, -1);
        return;
    }
 
    bridge_metrics = ast_calloc(ARRAY_LEN(bridge_metric_defs), sizeof(bridge_metrics));
    if (!bridge_metrics) {
        ast_free(metrics);
        ao2_ref(bridges, -1);
        return;
    }
 
    /* Bridge dependent values */
    it_bridges = ao2_iterator_init(bridges, 0);
    for (i = 0; (bridge = ao2_iterator_next(&it_bridges)); ao2_ref(bridge, -1), i++) {
        struct ast_bridge_snapshot *snapshot;
 
        /* Invisible bridges don't get shown externally and have no snapshot */
        if (ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_INVISIBLE)) {
            continue;
        }
 
        snapshot = ast_bridge_get_snapshot(bridge);
        if (!snapshot) {
            continue;
        }
 
        for (j = 0; j < ARRAY_LEN(bridge_metric_defs); j++) {
            int index = num_outputs++;
 
            metrics[index].type = PROMETHEUS_METRIC_GAUGE;
            ast_copy_string(metrics[index].name, bridge_metric_defs[j].name, sizeof(metrics[index].name));
            metrics[index].help = bridge_metric_defs[j].help;
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 0, "eid", eid_str);
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 1, "id", (snapshot->uniqueid));
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 2, "tech", (snapshot->technology));
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 3, "subclass", (snapshot->subclass));
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 4, "creator", (snapshot->creator));
            PROMETHEUS_METRIC_SET_LABEL(&metrics[index], 5, "name", (snapshot->name));
            bridge_metric_defs[j].get_value(&metrics[index], snapshot);
 
            if (bridge_metrics[j] == NULL) {
                bridge_metrics[j] = &metrics[index];
            } else {
                AST_LIST_INSERT_TAIL(&bridge_metrics[j]->children, &metrics[index], entry);
            }
        }
        ao2_ref(snapshot, -1);
    }
    ao2_iterator_destroy(&it_bridges);
 
    for (j = 0; j < ARRAY_LEN(bridge_metric_defs); j++) {
        if (bridge_metrics[j]) {
            prometheus_metric_to_string(bridge_metrics[j], response);
        }
    }
 
    ast_free(bridge_metrics);
    ast_free(metrics);
    ao2_ref(bridges, -1);
}

References ao2_container_clone, ao2_container_count(), ao2_iterator_destroy(), ao2_iterator_init(), ao2_iterator_next, ao2_ref, ARRAY_LEN, AST_BRIDGE_FLAG_INVISIBLE, ast_bridge_get_snapshot(), ast_bridges(), ast_calloc, ast_copy_string(), ast_eid_default, ast_eid_to_str(), ast_free, AST_LIST_INSERT_TAIL, ast_test_flag, bridges, ast_bridge_snapshot::creator, ast_bridge::feature_flags, bridge_metric_defs::get_value, bridge_metric_defs::help, metrics, name, ast_bridge_snapshot::name, NULL, PROMETHEUS_METRIC_GAUGE, PROMETHEUS_METRIC_SET_LABEL, PROMETHEUS_METRIC_STATIC_INITIALIZATION, prometheus_metric_to_string(), ast_bridge_snapshot::subclass, ast_bridge_snapshot::technology, ast_bridge_snapshot::uniqueid, and prometheus_metric::value.

get_bridge_channel_count()

static void get_bridge_channel_count ( struct prometheus_metric *  metric, struct ast_bridge_snapshot *  snapshot  )

static

Definition at line 42 of file bridges.c.

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

References ast_bridge_snapshot::num_channels, and prometheus_metric::value.

Variable Documentation

bridge_metric_defs

struct bridge_metric_defs bridge_metric_defs[]

bridges_callback

struct prometheus_callback bridges_callback

Initial value:

= {
    .name = "bridges callback",
    .callback_fn = bridges_scrape_cb,
}

Definition at line 183 of file bridges.c.

                                              {
    .name = "bridges callback",
    .callback_fn = bridges_scrape_cb,
};

Referenced by bridge_metrics_init(), and bridge_metrics_unload_cb().

provider

struct prometheus_metrics_provider provider

static

Initial value:

= {
    .name = "bridges",
    .unload_cb = bridge_metrics_unload_cb,
}

Definition at line 201 of file bridges.c.

                                                     {
    .name = "bridges",
    .unload_cb = bridge_metrics_unload_cb,
};

Referenced by _ast_device_state(), action_presencestate(), ast_phoneprov_add_extension(), ast_phoneprov_provider_register(), ast_presence_state_helper(), ast_presence_state_prov_add(), ast_presence_state_prov_del(), ast_sip_api_provider_register(), bridge_metrics_init(), do_presence_state_change(), getproviderstate(), presence_read(), presence_state_alloc(), presence_state_event(), prometheus_metrics_provider_register(), provider_destructor(), reload(), reload_module(), and unload_module().