1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
#include <uwsgi.h>
/*
this is a stats pusher plugin for the statsd server:
--stats-push statsd:address[,prefix]
example:
--stats-push statsd:127.0.0.1:8125,myinstance
it exports values exposed by the metric subsystem
*/
extern struct uwsgi_server uwsgi;
// configuration of a statsd node
struct statsd_node {
int fd;
union uwsgi_sockaddr addr;
socklen_t addr_len;
char *prefix;
uint16_t prefix_len;
};
static int statsd_send_metric(struct uwsgi_buffer *ub, struct uwsgi_stats_pusher_instance *uspi, char *metric, size_t metric_len, int64_t value, char type[2]) {
struct statsd_node *sn = (struct statsd_node *) uspi->data;
// reset the buffer
ub->pos = 0;
if (uwsgi_buffer_append(ub, sn->prefix, sn->prefix_len)) return -1;
if (uwsgi_buffer_append(ub, ".", 1)) return -1;
if (uwsgi_buffer_append(ub, metric, metric_len)) return -1;
if (uwsgi_buffer_append(ub, ":", 1)) return -1;
if (uwsgi_buffer_num64(ub, value)) return -1;
if (uwsgi_buffer_append(ub, type, 2)) return -1;
if (sendto(sn->fd, ub->buf, ub->pos, 0, (struct sockaddr *) &sn->addr.sa_in, sn->addr_len) < 0) {
uwsgi_error("statsd_send_metric()/sendto()");
}
return 0;
}
static void stats_pusher_statsd(struct uwsgi_stats_pusher_instance *uspi, time_t now, char *json, size_t json_len) {
if (!uspi->configured) {
struct statsd_node *sn = uwsgi_calloc(sizeof(struct statsd_node));
char *comma = strchr(uspi->arg, ',');
if (comma) {
sn->prefix = comma+1;
sn->prefix_len = strlen(sn->prefix);
*comma = 0;
}
else {
sn->prefix = "uwsgi";
sn->prefix_len = 5;
}
char *colon = strchr(uspi->arg, ':');
if (!colon) {
uwsgi_log("invalid statsd address %s\n", uspi->arg);
if (comma) *comma = ',';
free(sn);
return;
}
sn->addr_len = socket_to_in_addr(uspi->arg, colon, 0, &sn->addr.sa_in);
sn->fd = socket(AF_INET, SOCK_DGRAM, 0);
if (sn->fd < 0) {
uwsgi_error("stats_pusher_statsd()/socket()");
if (comma) *comma = ',';
free(sn);
return;
}
uwsgi_socket_nb(sn->fd);
if (comma) *comma = ',';
uspi->data = sn;
uspi->configured = 1;
}
// we use the same buffer for all of the packets
struct uwsgi_buffer *ub = uwsgi_buffer_new(uwsgi.page_size);
struct uwsgi_metric *um = uwsgi.metrics;
while(um) {
uwsgi_rlock(uwsgi.metrics_lock);
// ignore return value
if (um->type == UWSGI_METRIC_GAUGE) {
statsd_send_metric(ub, uspi, um->name, um->name_len, *um->value, "|g");
}
else {
statsd_send_metric(ub, uspi, um->name, um->name_len, *um->value, "|c");
}
uwsgi_rwunlock(uwsgi.metrics_lock);
if (um->reset_after_push){
uwsgi_wlock(uwsgi.metrics_lock);
*um->value = um->initial_value;
uwsgi_rwunlock(uwsgi.metrics_lock);
}
um = um->next;
}
uwsgi_buffer_destroy(ub);
}
static void stats_pusher_statsd_init(void) {
struct uwsgi_stats_pusher *usp = uwsgi_register_stats_pusher("statsd", stats_pusher_statsd);
// we use a custom format not the JSON one
usp->raw = 1;
}
struct uwsgi_plugin stats_pusher_statsd_plugin = {
.name = "stats_pusher_statsd",
.on_load = stats_pusher_statsd_init,
};
|
