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|
#include "common.h"
// ----------------------------------------------------------------------------
// PROMETHEUS
// /api/v1/allmetrics?format=prometheus
static struct prometheus_server {
const char *server;
uint32_t hash;
time_t last_access;
struct prometheus_server *next;
} *prometheus_server_root = NULL;
static inline time_t prometheus_server_last_access(const char *server, time_t now) {
uint32_t hash = simple_hash(server);
struct prometheus_server *ps;
for(ps = prometheus_server_root; ps ;ps = ps->next) {
if (hash == ps->hash && !strcmp(server, ps->server)) {
time_t last = ps->last_access;
ps->last_access = now;
return last;
}
}
ps = callocz(1, sizeof(struct prometheus_server));
ps->server = strdupz(server);
ps->hash = hash;
ps->last_access = now;
ps->next = prometheus_server_root;
prometheus_server_root = ps;
return 0;
}
static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable) {
size_t n;
for(n = 0; *s && n < usable ; d++, s++, n++) {
register char c = *s;
if(!isalnum(c)) *d = '_';
else *d = c;
}
*d = '\0';
return n;
}
static inline size_t prometheus_label_copy(char *d, const char *s, size_t usable) {
size_t n;
// make sure we can escape one character without overflowing the buffer
usable--;
for(n = 0; *s && n < usable ; d++, s++, n++) {
register char c = *s;
if(unlikely(c == '"' || c == '\\' || c == '\n')) {
*d++ = '\\';
n++;
}
*d = c;
}
*d = '\0';
return n;
}
static inline char *prometheus_units_copy(char *d, const char *s, size_t usable) {
const char *sorig = s;
char *ret = d;
size_t n;
*d++ = '_';
for(n = 1; *s && n < usable ; d++, s++, n++) {
register char c = *s;
if(!isalnum(c)) *d = '_';
else *d = c;
}
if(n == 2 && sorig[0] == '%') {
n = 0;
d = ret;
s = "_percent";
for( ; *s && n < usable ; n++) *d++ = *s++;
}
else if(n > 3 && sorig[n-3] == '/' && sorig[n-2] == 's') {
n = n - 2;
d -= 2;
s = "_persec";
for( ; *s && n < usable ; n++) *d++ = *s++;
}
*d = '\0';
return ret;
}
#define PROMETHEUS_ELEMENT_MAX 256
#define PROMETHEUS_LABELS_MAX 1024
static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb, const char *prefix, uint32_t options, time_t after, time_t before, int allhosts, int help, int types, int names) {
rrdhost_rdlock(host);
char hostname[PROMETHEUS_ELEMENT_MAX + 1];
prometheus_label_copy(hostname, host->hostname, PROMETHEUS_ELEMENT_MAX);
char labels[PROMETHEUS_LABELS_MAX + 1] = "";
if(allhosts) {
if(host->tags && *(host->tags))
buffer_sprintf(wb, "netdata_host_tags{instance=\"%s\",%s} 1 %llu\n", hostname, host->tags, now_realtime_usec() / USEC_PER_MS);
snprintfz(labels, PROMETHEUS_LABELS_MAX, ",instance=\"%s\"", hostname);
}
else {
if(host->tags && *(host->tags))
buffer_sprintf(wb, "netdata_host_tags{%s} 1 %llu\n", host->tags, now_realtime_usec() / USEC_PER_MS);
}
// for each chart
RRDSET *st;
rrdset_foreach_read(st, host) {
char chart[PROMETHEUS_ELEMENT_MAX + 1];
char context[PROMETHEUS_ELEMENT_MAX + 1];
char family[PROMETHEUS_ELEMENT_MAX + 1];
char units[PROMETHEUS_ELEMENT_MAX + 1] = "";
prometheus_label_copy(chart, (names && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
if(likely(backends_can_send_rrdset(options, st))) {
rrdset_rdlock(st);
int as_collected = ((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED);
int homogeneus = 1;
if(as_collected) {
if(rrdset_flag_check(st, RRDSET_FLAG_HOMEGENEOUS_CHECK))
rrdset_update_heterogeneous_flag(st);
if(rrdset_flag_check(st, RRDSET_FLAG_HETEROGENEOUS))
homogeneus = 0;
}
else {
if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AVERAGE)
prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX);
}
if(unlikely(help))
buffer_sprintf(wb, "\n# COMMENT %s chart \"%s\", context \"%s\", family \"%s\", units \"%s\"\n"
, (homogeneus)?"homogeneus":"heterogeneous"
, (names && st->name) ? st->name : st->id
, st->context
, st->family
, st->units
);
// for each dimension
RRDDIM *rd;
rrddim_foreach_read(rd, st) {
if(rd->collections_counter) {
char dimension[PROMETHEUS_ELEMENT_MAX + 1];
char *suffix = "";
if (as_collected) {
// we need as-collected / raw data
const char *t = "gauge", *h = "gives";
if(rd->algorithm == RRD_ALGORITHM_INCREMENTAL ||
rd->algorithm == RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL) {
t = "counter";
h = "delta gives";
suffix = "_total";
}
if(homogeneus) {
// all the dimensions of the chart, has the same algorithm, multiplier and divisor
// we add all dimensions as labels
prometheus_label_copy(dimension, (names && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
if(unlikely(help))
buffer_sprintf(wb
, "# COMMENT %s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
, prefix
, context
, suffix
, (names && st->name) ? st->name : st->id
, st->context
, st->family
, (names && rd->name) ? rd->name : rd->id
, rd->multiplier
, rd->divisor
, h
, st->units
, t
);
if(unlikely(types))
buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s %s\n"
, prefix
, context
, suffix
, t
);
buffer_sprintf(wb
, "%s_%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
, prefix
, context
, suffix
, chart
, family
, dimension
, labels
, rd->last_collected_value
, timeval_msec(&rd->last_collected_time)
);
}
else {
// the dimensions of the chart, do not have the same algorithm, multiplier or divisor
// we create a metric per dimension
prometheus_name_copy(dimension, (names && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
if(unlikely(help))
buffer_sprintf(wb
, "# COMMENT %s_%s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
, prefix
, context
, dimension
, suffix
, (names && st->name) ? st->name : st->id
, st->context
, st->family
, (names && rd->name) ? rd->name : rd->id
, rd->multiplier
, rd->divisor
, h
, st->units
, t
);
if(unlikely(types))
buffer_sprintf(wb, "# COMMENT TYPE %s_%s_%s%s %s\n"
, prefix
, context
, dimension
, suffix
, t
);
buffer_sprintf(wb
, "%s_%s_%s%s{chart=\"%s\",family=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
, prefix
, context
, dimension
, suffix
, chart
, family
, labels
, rd->last_collected_value
, timeval_msec(&rd->last_collected_time)
);
}
}
else {
// we need average or sum of the data
time_t first_t = after, last_t = before;
calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options, &first_t, &last_t);
if(!isnan(value) && !isinf(value)) {
if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AVERAGE)
suffix = "_average";
else if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_SUM)
suffix = "_sum";
prometheus_label_copy(dimension, (names && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
if (unlikely(help))
buffer_sprintf(wb, "# COMMENT %s_%s%s%s: dimension \"%s\", value is %s, gauge, dt %llu to %llu inclusive\n"
, prefix
, context
, units
, suffix
, (names && rd->name) ? rd->name : rd->id
, st->units
, (unsigned long long)first_t
, (unsigned long long)last_t
);
if (unlikely(types))
buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s%s gauge\n"
, prefix
, context
, units
, suffix
);
buffer_sprintf(wb, "%s_%s%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " CALCULATED_NUMBER_FORMAT " %llu\n"
, prefix
, context
, units
, suffix
, chart
, family
, dimension
, labels
, value
, last_t * MSEC_PER_SEC
);
}
}
}
}
rrdset_unlock(st);
}
}
rrdhost_unlock(host);
}
static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, uint32_t options, const char *server, time_t now, int help) {
if(!server || !*server) server = "default";
time_t after = prometheus_server_last_access(server, now);
int first_seen = 0;
if(!after) {
after = now - backend_update_every;
first_seen = 1;
}
if(after > now) {
// oops! this should never happen
after = now - backend_update_every;
}
if(help) {
int show_range = 1;
char *mode;
if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED) {
mode = "as collected";
show_range = 0;
}
else if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AVERAGE)
mode = "average";
else if((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_SUM)
mode = "sum";
else
mode = "unknown";
buffer_sprintf(wb, "# COMMENT netdata \"%s\" to %sprometheus \"%s\", source \"%s\", last seen %lu %s"
, host->hostname
, (first_seen)?"FIRST SEEN ":""
, server
, mode
, (unsigned long)((first_seen)?0:(now - after))
, (first_seen)?"never":"seconds ago"
);
if(show_range)
buffer_sprintf(wb, ", time range %lu to %lu", (unsigned long)after, (unsigned long)now);
buffer_strcat(wb, "\n\n");
}
return after;
}
void rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, uint32_t options, int help, int types, int names) {
time_t before = now_realtime_sec();
// we start at the point we had stopped before
time_t after = prometheus_preparation(host, wb, options, server, before, help);
rrd_stats_api_v1_charts_allmetrics_prometheus(host, wb, prefix, options, after, before, 0, help, types, names);
}
void rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, uint32_t options, int help, int types, int names) {
time_t before = now_realtime_sec();
// we start at the point we had stopped before
time_t after = prometheus_preparation(host, wb, options, server, before, help);
rrd_rdlock();
rrdhost_foreach_read(host) {
rrd_stats_api_v1_charts_allmetrics_prometheus(host, wb, prefix, options, after, before, 1, help, types, names);
}
rrd_unlock();
}
|
