mirror of
https://github.com/netdata/netdata.git
synced 2025-05-14 21:42:37 +00:00
2f6f8155db
* Add IPC message queue charts * Add obsolete flag for dimensions * Delete obsolete dimensions from memory * Remove files for obsolete dimensions, filter requests * Make empty charts obsolete * Minimize obsolete dimension checks * Limit the number of dimensions in memory * Remove obsolete dimensions on netdata exit * Update documentation * Move flag to the end * Fix typo * Fix typo
562 lines
25 KiB
C
562 lines
25 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#define BACKENDS_INTERNALS
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#include "backend_prometheus.h"
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// ----------------------------------------------------------------------------
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// PROMETHEUS
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// /api/v1/allmetrics?format=prometheus and /api/v1/allmetrics?format=prometheus_all_hosts
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static struct prometheus_server {
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const char *server;
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uint32_t hash;
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RRDHOST *host;
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time_t last_access;
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struct prometheus_server *next;
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} *prometheus_server_root = NULL;
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static inline time_t prometheus_server_last_access(const char *server, RRDHOST *host, time_t now) {
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static netdata_mutex_t prometheus_server_root_mutex = NETDATA_MUTEX_INITIALIZER;
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uint32_t hash = simple_hash(server);
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netdata_mutex_lock(&prometheus_server_root_mutex);
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struct prometheus_server *ps;
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for(ps = prometheus_server_root; ps ;ps = ps->next) {
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if (host == ps->host && hash == ps->hash && !strcmp(server, ps->server)) {
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time_t last = ps->last_access;
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ps->last_access = now;
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netdata_mutex_unlock(&prometheus_server_root_mutex);
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return last;
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}
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}
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ps = callocz(1, sizeof(struct prometheus_server));
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ps->server = strdupz(server);
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ps->hash = hash;
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ps->host = host;
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ps->last_access = now;
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ps->next = prometheus_server_root;
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prometheus_server_root = ps;
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netdata_mutex_unlock(&prometheus_server_root_mutex);
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return 0;
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}
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static inline size_t prometheus_name_copy(char *d, const char *s, size_t usable) {
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size_t n;
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for(n = 0; *s && n < usable ; d++, s++, n++) {
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register char c = *s;
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if(!isalnum(c)) *d = '_';
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else *d = c;
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}
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*d = '\0';
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return n;
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}
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static inline size_t prometheus_label_copy(char *d, const char *s, size_t usable) {
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size_t n;
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// make sure we can escape one character without overflowing the buffer
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usable--;
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for(n = 0; *s && n < usable ; d++, s++, n++) {
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register char c = *s;
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if(unlikely(c == '"' || c == '\\' || c == '\n')) {
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*d++ = '\\';
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n++;
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}
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*d = c;
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}
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*d = '\0';
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return n;
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}
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static inline char *prometheus_units_copy(char *d, const char *s, size_t usable) {
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const char *sorig = s;
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char *ret = d;
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size_t n;
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*d++ = '_';
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for(n = 1; *s && n < usable ; d++, s++, n++) {
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register char c = *s;
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if(!isalnum(c)) *d = '_';
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else *d = c;
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}
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if(n == 2 && sorig[0] == '%') {
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n = 0;
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d = ret;
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s = "_percent";
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for( ; *s && n < usable ; n++) *d++ = *s++;
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}
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else if(n > 3 && sorig[n-3] == '/' && sorig[n-2] == 's') {
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n = n - 2;
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d -= 2;
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s = "_persec";
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for( ; *s && n < usable ; n++) *d++ = *s++;
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}
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*d = '\0';
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return ret;
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}
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#define PROMETHEUS_ELEMENT_MAX 256
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#define PROMETHEUS_LABELS_MAX 1024
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#define PROMETHEUS_VARIABLE_MAX 256
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struct host_variables_callback_options {
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RRDHOST *host;
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BUFFER *wb;
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BACKEND_OPTIONS backend_options;
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PROMETHEUS_OUTPUT_OPTIONS output_options;
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const char *prefix;
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const char *labels;
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time_t now;
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int host_header_printed;
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char name[PROMETHEUS_VARIABLE_MAX+1];
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};
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static int print_host_variables(RRDVAR *rv, void *data) {
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struct host_variables_callback_options *opts = data;
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if(rv->options & (RRDVAR_OPTION_CUSTOM_HOST_VAR|RRDVAR_OPTION_CUSTOM_CHART_VAR)) {
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if(!opts->host_header_printed) {
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opts->host_header_printed = 1;
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if(opts->output_options & PROMETHEUS_OUTPUT_HELP) {
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buffer_sprintf(opts->wb, "\n# COMMENT global host and chart variables\n");
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}
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}
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calculated_number value = rrdvar2number(rv);
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if(isnan(value) || isinf(value)) {
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if(opts->output_options & PROMETHEUS_OUTPUT_HELP)
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buffer_sprintf(opts->wb, "# COMMENT variable \"%s\" is %s. Skipped.\n", rv->name, (isnan(value))?"NAN":"INF");
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return 0;
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}
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char *label_pre = "";
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char *label_post = "";
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if(opts->labels && *opts->labels) {
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label_pre = "{";
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label_post = "}";
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}
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prometheus_name_copy(opts->name, rv->name, sizeof(opts->name));
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if(opts->output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
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buffer_sprintf(opts->wb
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, "%s_%s%s%s%s " CALCULATED_NUMBER_FORMAT " %llu\n"
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, opts->prefix
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, opts->name
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, label_pre
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, opts->labels
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, label_post
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, value
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, ((rv->last_updated) ? rv->last_updated : opts->now) * 1000ULL
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);
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else
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buffer_sprintf(opts->wb, "%s_%s%s%s%s " CALCULATED_NUMBER_FORMAT "\n"
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, opts->prefix
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, opts->name
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, label_pre
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, opts->labels
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, label_post
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, value
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);
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return 1;
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}
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return 0;
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}
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static void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb, const char *prefix, BACKEND_OPTIONS backend_options, time_t after, time_t before, int allhosts, PROMETHEUS_OUTPUT_OPTIONS output_options) {
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rrdhost_rdlock(host);
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char hostname[PROMETHEUS_ELEMENT_MAX + 1];
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prometheus_label_copy(hostname, host->hostname, PROMETHEUS_ELEMENT_MAX);
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char labels[PROMETHEUS_LABELS_MAX + 1] = "";
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if(allhosts) {
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
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buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1 %llu\n", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
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else
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buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1\n", hostname, host->program_name, host->program_version);
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if(host->tags && *(host->tags)) {
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS) {
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buffer_sprintf(wb, "netdata_host_tags_info{instance=\"%s\",%s} 1 %llu\n", hostname, host->tags, now_realtime_usec() / USEC_PER_MS);
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// deprecated, exists only for compatibility with older queries
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buffer_sprintf(wb, "netdata_host_tags{instance=\"%s\",%s} 1 %llu\n", hostname, host->tags, now_realtime_usec() / USEC_PER_MS);
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}
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else {
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buffer_sprintf(wb, "netdata_host_tags_info{instance=\"%s\",%s} 1\n", hostname, host->tags);
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// deprecated, exists only for compatibility with older queries
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buffer_sprintf(wb, "netdata_host_tags{instance=\"%s\",%s} 1\n", hostname, host->tags);
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}
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}
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snprintfz(labels, PROMETHEUS_LABELS_MAX, ",instance=\"%s\"", hostname);
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}
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else {
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
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buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1 %llu\n", hostname, host->program_name, host->program_version, now_realtime_usec() / USEC_PER_MS);
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else
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buffer_sprintf(wb, "netdata_info{instance=\"%s\",application=\"%s\",version=\"%s\"} 1\n", hostname, host->program_name, host->program_version);
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if(host->tags && *(host->tags)) {
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS) {
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buffer_sprintf(wb, "netdata_host_tags_info{%s} 1 %llu\n", host->tags, now_realtime_usec() / USEC_PER_MS);
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// deprecated, exists only for compatibility with older queries
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buffer_sprintf(wb, "netdata_host_tags{%s} 1 %llu\n", host->tags, now_realtime_usec() / USEC_PER_MS);
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}
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else {
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buffer_sprintf(wb, "netdata_host_tags_info{%s} 1\n", host->tags);
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// deprecated, exists only for compatibility with older queries
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buffer_sprintf(wb, "netdata_host_tags{%s} 1\n", host->tags);
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}
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}
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}
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// send custom variables set for the host
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if(output_options & PROMETHEUS_OUTPUT_VARIABLES){
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struct host_variables_callback_options opts = {
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.host = host,
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.wb = wb,
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.labels = (labels[0] == ',')?&labels[1]:labels,
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.backend_options = backend_options,
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.output_options = output_options,
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.prefix = prefix,
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.now = now_realtime_sec(),
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.host_header_printed = 0
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};
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foreach_host_variable_callback(host, print_host_variables, &opts);
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}
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// for each chart
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RRDSET *st;
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rrdset_foreach_read(st, host) {
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char chart[PROMETHEUS_ELEMENT_MAX + 1];
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char context[PROMETHEUS_ELEMENT_MAX + 1];
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char family[PROMETHEUS_ELEMENT_MAX + 1];
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char units[PROMETHEUS_ELEMENT_MAX + 1] = "";
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prometheus_label_copy(chart, (output_options & PROMETHEUS_OUTPUT_NAMES && st->name)?st->name:st->id, PROMETHEUS_ELEMENT_MAX);
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prometheus_label_copy(family, st->family, PROMETHEUS_ELEMENT_MAX);
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prometheus_name_copy(context, st->context, PROMETHEUS_ELEMENT_MAX);
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if(likely(backends_can_send_rrdset(backend_options, st))) {
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rrdset_rdlock(st);
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int as_collected = (BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED);
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int homogeneus = 1;
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if(as_collected) {
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if(rrdset_flag_check(st, RRDSET_FLAG_HOMEGENEOUS_CHECK))
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rrdset_update_heterogeneous_flag(st);
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if(rrdset_flag_check(st, RRDSET_FLAG_HETEROGENEOUS))
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homogeneus = 0;
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}
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else {
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if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE)
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prometheus_units_copy(units, st->units, PROMETHEUS_ELEMENT_MAX);
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}
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if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
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buffer_sprintf(wb, "\n# COMMENT %s chart \"%s\", context \"%s\", family \"%s\", units \"%s\"\n"
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, (homogeneus)?"homogeneus":"heterogeneous"
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, (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
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, st->context
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, st->family
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, st->units
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);
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// for each dimension
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RRDDIM *rd;
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rrddim_foreach_read(rd, st) {
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if(rd->collections_counter && !rrddim_flag_check(rd, RRDDIM_FLAG_OBSOLETE)) {
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char dimension[PROMETHEUS_ELEMENT_MAX + 1];
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char *suffix = "";
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if (as_collected) {
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// we need as-collected / raw data
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if(unlikely(rd->last_collected_time.tv_sec < after))
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continue;
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const char *t = "gauge", *h = "gives";
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if(rd->algorithm == RRD_ALGORITHM_INCREMENTAL ||
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rd->algorithm == RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL) {
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t = "counter";
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h = "delta gives";
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suffix = "_total";
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}
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if(homogeneus) {
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// all the dimensions of the chart, has the same algorithm, multiplier and divisor
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// we add all dimensions as labels
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prometheus_label_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
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if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
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buffer_sprintf(wb
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, "# COMMENT %s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
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, prefix
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, context
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, suffix
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, (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
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, st->context
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, st->family
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, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
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, rd->multiplier
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, rd->divisor
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, h
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, st->units
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, t
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);
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if(unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
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buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s %s\n"
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, prefix
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, context
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, suffix
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, t
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);
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
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buffer_sprintf(wb
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, "%s_%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
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, prefix
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, context
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, suffix
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, chart
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, family
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, dimension
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, labels
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, rd->last_collected_value
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, timeval_msec(&rd->last_collected_time)
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);
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else
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buffer_sprintf(wb
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, "%s_%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " COLLECTED_NUMBER_FORMAT "\n"
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, prefix
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, context
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, suffix
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, chart
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, family
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, dimension
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, labels
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, rd->last_collected_value
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);
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}
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else {
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// the dimensions of the chart, do not have the same algorithm, multiplier or divisor
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// we create a metric per dimension
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prometheus_name_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
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if(unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
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buffer_sprintf(wb
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, "# COMMENT %s_%s_%s%s: chart \"%s\", context \"%s\", family \"%s\", dimension \"%s\", value * " COLLECTED_NUMBER_FORMAT " / " COLLECTED_NUMBER_FORMAT " %s %s (%s)\n"
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, prefix
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, context
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, dimension
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, suffix
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, (output_options & PROMETHEUS_OUTPUT_NAMES && st->name) ? st->name : st->id
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, st->context
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, st->family
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, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
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, rd->multiplier
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, rd->divisor
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, h
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, st->units
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, t
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);
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if(unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
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buffer_sprintf(wb, "# COMMENT TYPE %s_%s_%s%s %s\n"
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, prefix
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, context
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, dimension
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, suffix
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, t
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);
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
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buffer_sprintf(wb
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, "%s_%s_%s%s{chart=\"%s\",family=\"%s\"%s} " COLLECTED_NUMBER_FORMAT " %llu\n"
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, prefix
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, context
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, dimension
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, suffix
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, chart
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, family
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, labels
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, rd->last_collected_value
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, timeval_msec(&rd->last_collected_time)
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);
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else
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buffer_sprintf(wb
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, "%s_%s_%s%s{chart=\"%s\",family=\"%s\"%s} " COLLECTED_NUMBER_FORMAT "\n"
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, prefix
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, context
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, dimension
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, suffix
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, chart
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, family
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, labels
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, rd->last_collected_value
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);
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}
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}
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else {
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// we need average or sum of the data
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time_t first_t = after, last_t = before;
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calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, backend_options, &first_t, &last_t);
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if(!isnan(value) && !isinf(value)) {
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if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE)
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suffix = "_average";
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else if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM)
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suffix = "_sum";
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prometheus_label_copy(dimension, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id, PROMETHEUS_ELEMENT_MAX);
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if (unlikely(output_options & PROMETHEUS_OUTPUT_HELP))
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buffer_sprintf(wb, "# COMMENT %s_%s%s%s: dimension \"%s\", value is %s, gauge, dt %llu to %llu inclusive\n"
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, prefix
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, context
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, units
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, suffix
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, (output_options & PROMETHEUS_OUTPUT_NAMES && rd->name) ? rd->name : rd->id
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, st->units
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, (unsigned long long)first_t
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, (unsigned long long)last_t
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);
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if (unlikely(output_options & PROMETHEUS_OUTPUT_TYPES))
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buffer_sprintf(wb, "# COMMENT TYPE %s_%s%s%s gauge\n"
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, prefix
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, context
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, units
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, suffix
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);
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if(output_options & PROMETHEUS_OUTPUT_TIMESTAMPS)
|
|
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
|
|
);
|
|
else
|
|
buffer_sprintf(wb, "%s_%s%s%s{chart=\"%s\",family=\"%s\",dimension=\"%s\"%s} " CALCULATED_NUMBER_FORMAT "\n"
|
|
, prefix
|
|
, context
|
|
, units
|
|
, suffix
|
|
, chart
|
|
, family
|
|
, dimension
|
|
, labels
|
|
, value
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
rrdset_unlock(st);
|
|
}
|
|
}
|
|
|
|
rrdhost_unlock(host);
|
|
}
|
|
|
|
static inline time_t prometheus_preparation(RRDHOST *host, BUFFER *wb, BACKEND_OPTIONS backend_options, const char *server, time_t now, PROMETHEUS_OUTPUT_OPTIONS output_options) {
|
|
if(!server || !*server) server = "default";
|
|
|
|
time_t after = prometheus_server_last_access(server, host, now);
|
|
|
|
int first_seen = 0;
|
|
if(!after) {
|
|
after = now - global_backend_update_every;
|
|
first_seen = 1;
|
|
}
|
|
|
|
if(after > now) {
|
|
// oops! this should never happen
|
|
after = now - global_backend_update_every;
|
|
}
|
|
|
|
if(output_options & PROMETHEUS_OUTPUT_HELP) {
|
|
char *mode;
|
|
if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
|
|
mode = "as collected";
|
|
else if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AVERAGE)
|
|
mode = "average";
|
|
else if(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM)
|
|
mode = "sum";
|
|
else
|
|
mode = "unknown";
|
|
|
|
buffer_sprintf(wb, "# COMMENT netdata \"%s\" to %sprometheus \"%s\", source \"%s\", last seen %lu %s, time range %lu to %lu\n\n"
|
|
, host->hostname
|
|
, (first_seen)?"FIRST SEEN ":""
|
|
, server
|
|
, mode
|
|
, (unsigned long)((first_seen)?0:(now - after))
|
|
, (first_seen)?"never":"seconds ago"
|
|
, (unsigned long)after, (unsigned long)now
|
|
);
|
|
}
|
|
|
|
return after;
|
|
}
|
|
|
|
void rrd_stats_api_v1_charts_allmetrics_prometheus_single_host(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options) {
|
|
time_t before = now_realtime_sec();
|
|
|
|
// we start at the point we had stopped before
|
|
time_t after = prometheus_preparation(host, wb, backend_options, server, before, output_options);
|
|
|
|
rrd_stats_api_v1_charts_allmetrics_prometheus(host, wb, prefix, backend_options, after, before, 0, output_options);
|
|
}
|
|
|
|
void rrd_stats_api_v1_charts_allmetrics_prometheus_all_hosts(RRDHOST *host, BUFFER *wb, const char *server, const char *prefix, BACKEND_OPTIONS backend_options, PROMETHEUS_OUTPUT_OPTIONS output_options) {
|
|
time_t before = now_realtime_sec();
|
|
|
|
// we start at the point we had stopped before
|
|
time_t after = prometheus_preparation(host, wb, backend_options, server, before, output_options);
|
|
|
|
rrd_rdlock();
|
|
rrdhost_foreach_read(host) {
|
|
rrd_stats_api_v1_charts_allmetrics_prometheus(host, wb, prefix, backend_options, after, before, 1, output_options);
|
|
}
|
|
rrd_unlock();
|
|
}
|