Asterisk - The Open Source Telephony Project GIT-master-55f4e6d
Data Structures | Macros | Functions | Variables
res/prometheus/endpoints.c File Reference

Prometheus Endpoint Metrics. More...

#include "asterisk.h"
#include "asterisk/stasis_endpoints.h"
#include "asterisk/res_prometheus.h"
#include "prometheus_internal.h"
Include dependency graph for res/prometheus/endpoints.c:

Go to the source code of this file.

Data Structures

struct  endpoint_metric_defs
 

Macros

#define ENDPOINTS_CHANNELS_COUNT_HELP   "Count of the number of channels currently existing that are associated with the endpoint."
 
#define ENDPOINTS_STATE_HELP   "Individual endpoint states. 0=unknown; 1=offline; 2=online."
 

Functions

int endpoint_metrics_init (void)
 Initialize endpoint metrics. More...
 
static void endpoint_metrics_unload_cb (void)
 
static void endpoints_scrape_cb (struct ast_str **response)
 
static void get_endpoint_channel_count (struct prometheus_metric *metric, struct ast_endpoint_snapshot *snapshot)
 
static void get_endpoint_state (struct prometheus_metric *metric, struct ast_endpoint_snapshot *snapshot)
 

Variables

struct endpoint_metric_defs endpoint_metric_defs []
 
struct prometheus_callback endpoints_callback
 
static struct prometheus_metrics_provider provider
 

Detailed Description

Prometheus Endpoint Metrics.

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

Definition in file res/prometheus/endpoints.c.

Macro Definition Documentation

◆ ENDPOINTS_CHANNELS_COUNT_HELP

#define ENDPOINTS_CHANNELS_COUNT_HELP   "Count of the number of channels currently existing that are associated with the endpoint."

Definition at line 35 of file res/prometheus/endpoints.c.

◆ ENDPOINTS_STATE_HELP

#define ENDPOINTS_STATE_HELP   "Individual endpoint states. 0=unknown; 1=offline; 2=online."

Definition at line 33 of file res/prometheus/endpoints.c.

Function Documentation

◆ endpoint_metrics_init()

int endpoint_metrics_init ( void  )

Initialize endpoint metrics.

Return values
0success
-1error

Definition at line 198 of file res/prometheus/endpoints.c.

199{
202
203 return 0;
204}
struct prometheus_callback endpoints_callback
static struct prometheus_metrics_provider provider
void prometheus_metrics_provider_register(const struct prometheus_metrics_provider *provider)
Register a metrics provider.
int prometheus_callback_register(struct prometheus_callback *callback)

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

Referenced by load_module().

◆ endpoint_metrics_unload_cb()

static void endpoint_metrics_unload_cb ( void  )
static

Definition at line 184 of file res/prometheus/endpoints.c.

185{
187}
void prometheus_callback_unregister(struct prometheus_callback *callback)
Remove a registered callback.

References endpoints_callback, and prometheus_callback_unregister().

◆ endpoints_scrape_cb()

static void endpoints_scrape_cb ( struct ast_str **  response)
static

Definition at line 97 of file res/prometheus/endpoints.c.

98{
99 struct ao2_container *endpoint_cache;
100 struct ao2_container *endpoints;
101 struct ao2_iterator it_endpoints;
102 struct stasis_message *message;
103 struct prometheus_metric *endpoint_metrics;
104 char eid_str[32];
105 int i, j, num_endpoints;
108 "asterisk_endpoints_count",
109 "Current endpoint count.",
110 NULL
111 );
112
113 ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default);
114
116 if (!endpoint_cache) {
117 return;
118 }
119 endpoints = ao2_container_clone(endpoint_cache, 0);
120 ao2_ref(endpoint_cache, -1);
121 if (!endpoints) {
122 return;
123 }
124
125 num_endpoints = ao2_container_count(endpoints);
126
127 /* Current endpoint count */
128 PROMETHEUS_METRIC_SET_LABEL(&endpoint_count, 0, "eid", eid_str);
129 snprintf(endpoint_count.value, sizeof(endpoint_count.value), "%d", num_endpoints);
130 prometheus_metric_to_string(&endpoint_count, response);
131
132 if (num_endpoints == 0) {
133 ao2_ref(endpoints, -1);
134 return;
135 }
136
137 endpoint_metrics = ast_calloc(ARRAY_LEN(endpoint_metric_defs) * num_endpoints, sizeof(*endpoint_metrics));
138 if (!endpoint_metrics) {
139 ao2_ref(endpoints, -1);
140 return;
141 }
142
143 /* Endpoint dependent values */
144 it_endpoints = ao2_iterator_init(endpoints, 0);
145 for (i = 0; (message = ao2_iterator_next(&it_endpoints)); ao2_ref(message, -1), i++) {
147
148 for (j = 0; j < ARRAY_LEN(endpoint_metric_defs); j++) {
149 int index = i * ARRAY_LEN(endpoint_metric_defs) + j;
150
151 endpoint_metrics[index].type = PROMETHEUS_METRIC_GAUGE;
152 ast_copy_string(endpoint_metrics[index].name, endpoint_metric_defs[j].name, sizeof(endpoint_metrics[index].name));
153 endpoint_metrics[index].help = endpoint_metric_defs[j].help;
154 PROMETHEUS_METRIC_SET_LABEL(&endpoint_metrics[index], 0, "eid", eid_str);
155 PROMETHEUS_METRIC_SET_LABEL(&endpoint_metrics[index], 1, "id", (snapshot->id));
156 PROMETHEUS_METRIC_SET_LABEL(&endpoint_metrics[index], 2, "tech", (snapshot->tech));
157 PROMETHEUS_METRIC_SET_LABEL(&endpoint_metrics[index], 3, "resource", (snapshot->resource));
158 endpoint_metric_defs[j].get_value(&endpoint_metrics[index], snapshot);
159
160 if (i != 0) {
161 AST_LIST_INSERT_TAIL(&endpoint_metrics[j].children, &endpoint_metrics[index], entry);
162 }
163 }
164 }
165 ao2_iterator_destroy(&it_endpoints);
166
167 for (j = 0; j < ARRAY_LEN(endpoint_metric_defs); j++) {
168 prometheus_metric_to_string(&endpoint_metrics[j], response);
169 }
170
171 ast_free(endpoint_metrics);
172 ao2_ref(endpoints, -1);
173}
#define ast_free(a)
Definition: astmm.h:180
#define ast_calloc(num, len)
A wrapper for calloc()
Definition: astmm.h:202
#define ao2_iterator_next(iter)
Definition: astobj2.h:1911
int ao2_container_count(struct ao2_container *c)
Returns the number of elements in a container.
struct ao2_iterator ao2_iterator_init(struct ao2_container *c, int flags) attribute_warn_unused_result
Create an iterator for a container.
#define ao2_ref(o, delta)
Reference/unreference an object and return the old refcount.
Definition: astobj2.h:459
void ao2_iterator_destroy(struct ao2_iterator *iter)
Destroy a container iterator.
#define ao2_container_clone(orig, flags)
Create a clone/copy of the given container.
Definition: astobj2.h:1419
static const char name[]
Definition: format_mp3.c:68
struct stasis_message_type * ast_endpoint_snapshot_type(void)
Message type for ast_endpoint_snapshot.
struct stasis_cache * ast_endpoint_cache(void)
Backend cache for ast_endpoint_topic_all_cached().
#define AST_LIST_INSERT_TAIL(head, elm, field)
Appends a list entry to the tail of a list.
Definition: linkedlists.h:731
static struct ao2_container * endpoints
#define PROMETHEUS_METRIC_SET_LABEL(metric, label, n, v)
Convenience macro for setting a label / value in a metric.
#define PROMETHEUS_METRIC_STATIC_INITIALIZATION(mtype, n, h, cb)
Convenience macro for initializing a metric on the stack.
@ PROMETHEUS_METRIC_GAUGE
A metric whose value can bounce around like a jackrabbit.
void prometheus_metric_to_string(struct prometheus_metric *metric, struct ast_str **output)
Convert a metric (and its children) into Prometheus compatible text.
#define NULL
Definition: resample.c:96
struct ao2_container * stasis_cache_dump(struct stasis_cache *cache, struct stasis_message_type *type)
Dump cached items to a subscription for the ast_eid_default entity.
Definition: stasis_cache.c:736
void * stasis_message_data(const struct stasis_message *msg)
Get the data contained in a message.
void ast_copy_string(char *dst, const char *src, size_t size)
Size-limited null-terminating string copy.
Definition: strings.h:425
Generic container type.
When we need to walk through a container, we use an ao2_iterator to keep track of the current positio...
Definition: astobj2.h:1821
A snapshot of an endpoint's state.
const ast_string_field tech
const ast_string_field id
const ast_string_field resource
void(*const get_value)(struct prometheus_metric *metric, struct ast_endpoint_snapshot *snapshot)
Callback function to generate a metric value for a given endpoint.
const char * help
Help text to display.
Definition: search.h:40
An actual, honest to god, metric.
const char * help
Pointer to a static string defining this metric's help text.
char value[PROMETHEUS_MAX_VALUE_LENGTH]
The current value.
enum prometheus_metric_type type
What type of metric we are.
char * ast_eid_to_str(char *s, int maxlen, struct ast_eid *eid)
Convert an EID to a string.
Definition: utils.c:2839
#define ARRAY_LEN(a)
Definition: utils.h:666
struct ast_eid ast_eid_default
Global EID.
Definition: options.c:93

References ao2_container_clone, ao2_container_count(), ao2_iterator_destroy(), ao2_iterator_init(), ao2_iterator_next, ao2_ref, ARRAY_LEN, ast_calloc, ast_copy_string(), ast_eid_default, ast_eid_to_str(), ast_endpoint_cache(), ast_endpoint_snapshot_type(), ast_free, AST_LIST_INSERT_TAIL, endpoints, endpoint_metric_defs::get_value, prometheus_metric::help, endpoint_metric_defs::help, ast_endpoint_snapshot::id, name, NULL, PROMETHEUS_METRIC_GAUGE, PROMETHEUS_METRIC_SET_LABEL, PROMETHEUS_METRIC_STATIC_INITIALIZATION, prometheus_metric_to_string(), ast_endpoint_snapshot::resource, stasis_cache_dump(), stasis_message_data(), ast_endpoint_snapshot::tech, prometheus_metric::type, and prometheus_metric::value.

◆ get_endpoint_channel_count()

static void get_endpoint_channel_count ( struct prometheus_metric metric,
struct ast_endpoint_snapshot snapshot 
)
static

Definition at line 56 of file res/prometheus/endpoints.c.

57{
58 snprintf(metric->value, sizeof(metric->value), "%d", snapshot->num_channels);
59}

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

◆ get_endpoint_state()

static void get_endpoint_state ( struct prometheus_metric metric,
struct ast_endpoint_snapshot snapshot 
)
static

Definition at line 44 of file res/prometheus/endpoints.c.

45{
46 snprintf(metric->value, sizeof(metric->value), "%d", snapshot->state);
47}
enum ast_endpoint_state state

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

Variable Documentation

◆ endpoint_metric_defs

◆ endpoints_callback

struct prometheus_callback endpoints_callback
Initial value:
= {
.name = "Endpoints callback",
.callback_fn = endpoints_scrape_cb,
}
static void endpoints_scrape_cb(struct ast_str **response)

Definition at line 175 of file res/prometheus/endpoints.c.

Referenced by endpoint_metrics_init(), and endpoint_metrics_unload_cb().

◆ provider

struct prometheus_metrics_provider provider
static
Initial value:
= {
.name = "endpoints",
}
static void endpoint_metrics_unload_cb(void)

Definition at line 193 of file res/prometheus/endpoints.c.

Referenced by endpoint_metrics_init().