diff options
Diffstat (limited to 'src/backends.c')
| -rw-r--r-- | src/backends.c | 969 |
1 files changed, 0 insertions, 969 deletions
diff --git a/src/backends.c b/src/backends.c deleted file mode 100644 index 1360638f2..000000000 --- a/src/backends.c +++ /dev/null @@ -1,969 +0,0 @@ -#include "common.h" - -// ---------------------------------------------------------------------------- -// How backends work in netdata: -// -// 1. There is an independent thread that runs at the required interval -// (for example, once every 10 seconds) -// -// 2. Every time it wakes, it calls the backend formatting functions to build -// a buffer of data. This is a very fast, memory only operation. -// -// 3. If the buffer already includes data, the new data are appended. -// If the buffer becomes too big, because the data cannot be sent, a -// log is written and the buffer is discarded. -// -// 4. Then it tries to send all the data. It blocks until all the data are sent -// or the socket returns an error. -// If the time required for this is above the interval, it starts skipping -// intervals, but the calculated values include the entire database, without -// gaps (it remembers the timestamps and continues from where it stopped). -// -// 5. repeats the above forever. -// - -const char *backend_prefix = "netdata"; -int backend_send_names = 1; -int backend_update_every = 10; -uint32_t backend_options = BACKEND_SOURCE_DATA_AVERAGE; - -// ---------------------------------------------------------------------------- -// helper functions for backends - -static inline size_t backend_name_copy(char *d, const char *s, size_t usable) { - size_t n; - - for(n = 0; *s && n < usable ; d++, s++, n++) { - char c = *s; - - if(c != '.' && !isalnum(c)) *d = '_'; - else *d = c; - } - *d = '\0'; - - return n; -} - -// calculate the SUM or AVERAGE of a dimension, for any timeframe -// may return NAN if the database does not have any value in the give timeframe - -inline calculated_number backend_calculate_value_from_stored_data( - RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap - , time_t *first_timestamp // the first point of the database used in this response - , time_t *last_timestamp // the timestamp that should be reported to backend -) { - RRDHOST *host = st->rrdhost; - - // find the edges of the rrd database for this chart - time_t first_t = rrdset_first_entry_t(st); - time_t last_t = rrdset_last_entry_t(st); - time_t update_every = st->update_every; - - // step back a little, to make sure we have complete data collection - // for all metrics - after -= update_every * 2; - before -= update_every * 2; - - // align the time-frame - after = after - (after % update_every); - before = before - (before % update_every); - - // for before, loose another iteration - // the latest point will be reported the next time - before -= update_every; - - if(unlikely(after > before)) - // this can happen when update_every > before - after - after = before; - - if(unlikely(after < first_t)) - after = first_t; - - if(unlikely(before > last_t)) - before = last_t; - - if(unlikely(before < first_t || after > last_t)) { - // the chart has not been updated in the wanted timeframe - debug(D_BACKEND, "BACKEND: %s.%s.%s: aligned timeframe %lu to %lu is outside the chart's database range %lu to %lu", - host->hostname, st->id, rd->id, - (unsigned long)after, (unsigned long)before, - (unsigned long)first_t, (unsigned long)last_t - ); - return NAN; - } - - *first_timestamp = after; - *last_timestamp = before; - - size_t counter = 0; - calculated_number sum = 0; - - long start_at_slot = rrdset_time2slot(st, before), - stop_at_slot = rrdset_time2slot(st, after), - slot, stop_now = 0; - - for(slot = start_at_slot; !stop_now ; slot--) { - - if(unlikely(slot < 0)) slot = st->entries - 1; - if(unlikely(slot == stop_at_slot)) stop_now = 1; - - storage_number n = rd->values[slot]; - - if(unlikely(!does_storage_number_exist(n))) { - // not collected - continue; - } - - calculated_number value = unpack_storage_number(n); - sum += value; - - counter++; - } - - if(unlikely(!counter)) { - debug(D_BACKEND, "BACKEND: %s.%s.%s: no values stored in database for range %lu to %lu", - host->hostname, st->id, rd->id, - (unsigned long)after, (unsigned long)before - ); - return NAN; - } - - if(unlikely((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_SUM)) - return sum; - - return sum / (calculated_number)counter; -} - - -// discard a response received by a backend -// after logging a simple of it to error.log - -static inline int discard_response(BUFFER *b, const char *backend) { - char sample[1024]; - const char *s = buffer_tostring(b); - char *d = sample, *e = &sample[sizeof(sample) - 1]; - - for(; *s && d < e ;s++) { - char c = *s; - if(unlikely(!isprint(c))) c = ' '; - *d++ = c; - } - *d = '\0'; - - info("BACKEND: received %zu bytes from %s backend. Ignoring them. Sample: '%s'", buffer_strlen(b), backend, sample); - buffer_flush(b); - return 0; -} - - -// ---------------------------------------------------------------------------- -// graphite backend - -static inline int format_dimension_collected_graphite_plaintext( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - (void)after; - (void)before; - (void)options; - - char chart_name[RRD_ID_LENGTH_MAX + 1]; - char dimension_name[RRD_ID_LENGTH_MAX + 1]; - backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX); - backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX); - - buffer_sprintf( - b - , "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n" - , prefix - , hostname - , chart_name - , dimension_name - , rd->last_collected_value - , (uint32_t)rd->last_collected_time.tv_sec - ); - - return 1; -} - -static inline int format_dimension_stored_graphite_plaintext( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - - char chart_name[RRD_ID_LENGTH_MAX + 1]; - char dimension_name[RRD_ID_LENGTH_MAX + 1]; - backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX); - backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX); - - 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)) { - - buffer_sprintf( - b - , "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n" - , prefix - , hostname - , chart_name - , dimension_name - , value - , (uint32_t) last_t - ); - - return 1; - } - return 0; -} - -static inline int process_graphite_response(BUFFER *b) { - return discard_response(b, "graphite"); -} - - -// ---------------------------------------------------------------------------- -// opentsdb backend - -static inline int format_dimension_collected_opentsdb_telnet( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - (void)after; - (void)before; - (void)options; - - char chart_name[RRD_ID_LENGTH_MAX + 1]; - char dimension_name[RRD_ID_LENGTH_MAX + 1]; - backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX); - backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX); - - buffer_sprintf( - b - , "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s%s%s\n" - , prefix - , chart_name - , dimension_name - , (uint32_t)rd->last_collected_time.tv_sec - , rd->last_collected_value - , hostname - , (host->tags)?" ":"" - , (host->tags)?host->tags:"" - ); - - return 1; -} - -static inline int format_dimension_stored_opentsdb_telnet( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - - 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); - - char chart_name[RRD_ID_LENGTH_MAX + 1]; - char dimension_name[RRD_ID_LENGTH_MAX + 1]; - backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX); - backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX); - - if(!isnan(value)) { - - buffer_sprintf( - b - , "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s%s%s\n" - , prefix - , chart_name - , dimension_name - , (uint32_t) last_t - , value - , hostname - , (host->tags)?" ":"" - , (host->tags)?host->tags:"" - ); - - return 1; - } - return 0; -} - -static inline int process_opentsdb_response(BUFFER *b) { - return discard_response(b, "opentsdb"); -} - - -// ---------------------------------------------------------------------------- -// json backend - -static inline int format_dimension_collected_json_plaintext( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - (void)after; - (void)before; - (void)options; - - const char *tags_pre = "", *tags_post = "", *tags = host->tags; - if(!tags) tags = ""; - - if(*tags) { - if(*tags == '{' || *tags == '[' || *tags == '"') { - tags_pre = "\"host_tags\":"; - tags_post = ","; - } - else { - tags_pre = "\"host_tags\":\""; - tags_post = "\","; - } - } - - buffer_sprintf(b, "{" - "\"prefix\":\"%s\"," - "\"hostname\":\"%s\"," - "%s%s%s" - - "\"chart_id\":\"%s\"," - "\"chart_name\":\"%s\"," - "\"chart_family\":\"%s\"," - "\"chart_context\": \"%s\"," - "\"chart_type\":\"%s\"," - "\"units\": \"%s\"," - - "\"id\":\"%s\"," - "\"name\":\"%s\"," - "\"value\":" COLLECTED_NUMBER_FORMAT "," - - "\"timestamp\": %u}\n", - prefix, - hostname, - tags_pre, tags, tags_post, - - st->id, - st->name, - st->family, - st->context, - st->type, - st->units, - - rd->id, - rd->name, - rd->last_collected_value, - - (uint32_t)rd->last_collected_time.tv_sec - ); - - return 1; -} - -static inline int format_dimension_stored_json_plaintext( - BUFFER *b // the buffer to write data to - , const char *prefix // the prefix to use - , RRDHOST *host // the host this chart comes from - , const char *hostname // the hostname (to override host->hostname) - , RRDSET *st // the chart - , RRDDIM *rd // the dimension - , time_t after // the start timestamp - , time_t before // the end timestamp - , uint32_t options // BACKEND_SOURCE_* bitmap -) { - (void)host; - - 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)) { - const char *tags_pre = "", *tags_post = "", *tags = host->tags; - if(!tags) tags = ""; - - if(*tags) { - if(*tags == '{' || *tags == '[' || *tags == '"') { - tags_pre = "\"host_tags\":"; - tags_post = ","; - } - else { - tags_pre = "\"host_tags\":\""; - tags_post = "\","; - } - } - - buffer_sprintf(b, "{" - "\"prefix\":\"%s\"," - "\"hostname\":\"%s\"," - "%s%s%s" - - "\"chart_id\":\"%s\"," - "\"chart_name\":\"%s\"," - "\"chart_family\":\"%s\"," - "\"chart_context\": \"%s\"," - "\"chart_type\":\"%s\"," - "\"units\": \"%s\"," - - "\"id\":\"%s\"," - "\"name\":\"%s\"," - "\"value\":" CALCULATED_NUMBER_FORMAT "," - - "\"timestamp\": %u}\n", - prefix, - hostname, - tags_pre, tags, tags_post, - - st->id, - st->name, - st->family, - st->context, - st->type, - st->units, - - rd->id, - rd->name, - value, - - (uint32_t) last_t - ); - - return 1; - } - return 0; -} - -static inline int process_json_response(BUFFER *b) { - return discard_response(b, "json"); -} - - -// ---------------------------------------------------------------------------- -// the backend thread - -static SIMPLE_PATTERN *charts_pattern = NULL; -static SIMPLE_PATTERN *hosts_pattern = NULL; - -inline int backends_can_send_rrdset(uint32_t options, RRDSET *st) { - RRDHOST *host = st->rrdhost; - - if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_BACKEND_IGNORE))) - return 0; - - if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_BACKEND_SEND))) { - // we have not checked this chart - if(simple_pattern_matches(charts_pattern, st->id) || simple_pattern_matches(charts_pattern, st->name)) - rrdset_flag_set(st, RRDSET_FLAG_BACKEND_SEND); - else { - rrdset_flag_set(st, RRDSET_FLAG_BACKEND_IGNORE); - debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is disabled for backends.", st->id, host->hostname); - return 0; - } - } - - if(unlikely(!rrdset_is_available_for_backends(st))) { - debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is not available for backends.", st->id, host->hostname); - return 0; - } - - if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE && !((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED))) { - debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s' because its memory mode is '%s' and the backend requires database access.", st->id, host->hostname, rrd_memory_mode_name(host->rrd_memory_mode)); - return 0; - } - - return 1; -} - -inline uint32_t backend_parse_data_source(const char *source, uint32_t mode) { - if(!strcmp(source, "raw") || !strcmp(source, "as collected") || !strcmp(source, "as-collected") || !strcmp(source, "as_collected") || !strcmp(source, "ascollected")) { - mode |= BACKEND_SOURCE_DATA_AS_COLLECTED; - mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AS_COLLECTED); - } - else if(!strcmp(source, "average")) { - mode |= BACKEND_SOURCE_DATA_AVERAGE; - mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AVERAGE); - } - else if(!strcmp(source, "sum") || !strcmp(source, "volume")) { - mode |= BACKEND_SOURCE_DATA_SUM; - mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_SUM); - } - else { - error("BACKEND: invalid data source method '%s'.", source); - } - - return mode; -} - -static void backends_main_cleanup(void *ptr) { - struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr; - static_thread->enabled = NETDATA_MAIN_THREAD_EXITING; - - info("cleaning up..."); - - static_thread->enabled = NETDATA_MAIN_THREAD_EXITED; -} - -void *backends_main(void *ptr) { - netdata_thread_cleanup_push(backends_main_cleanup, ptr); - - int default_port = 0; - int sock = -1; - BUFFER *b = buffer_create(1), *response = buffer_create(1); - int (*backend_request_formatter)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, uint32_t) = NULL; - int (*backend_response_checker)(BUFFER *) = NULL; - - // ------------------------------------------------------------------------ - // collect configuration options - - struct timeval timeout = { - .tv_sec = 0, - .tv_usec = 0 - }; - int enabled = config_get_boolean(CONFIG_SECTION_BACKEND, "enabled", 0); - const char *source = config_get(CONFIG_SECTION_BACKEND, "data source", "average"); - const char *type = config_get(CONFIG_SECTION_BACKEND, "type", "graphite"); - const char *destination = config_get(CONFIG_SECTION_BACKEND, "destination", "localhost"); - backend_prefix = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata"); - const char *hostname = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname); - backend_update_every = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", backend_update_every); - int buffer_on_failures = (int)config_get_number(CONFIG_SECTION_BACKEND, "buffer on failures", 10); - long timeoutms = config_get_number(CONFIG_SECTION_BACKEND, "timeout ms", backend_update_every * 2 * 1000); - backend_send_names = config_get_boolean(CONFIG_SECTION_BACKEND, "send names instead of ids", backend_send_names); - - charts_pattern = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send charts matching", "*"), NULL, SIMPLE_PATTERN_EXACT); - hosts_pattern = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send hosts matching", "localhost *"), NULL, SIMPLE_PATTERN_EXACT); - - - // ------------------------------------------------------------------------ - // validate configuration options - // and prepare for sending data to our backend - - backend_options = backend_parse_data_source(source, backend_options); - - if(timeoutms < 1) { - error("BACKEND: invalid timeout %ld ms given. Assuming %d ms.", timeoutms, backend_update_every * 2 * 1000); - timeoutms = backend_update_every * 2 * 1000; - } - timeout.tv_sec = (timeoutms * 1000) / 1000000; - timeout.tv_usec = (timeoutms * 1000) % 1000000; - - if(!enabled || backend_update_every < 1) - goto cleanup; - - // ------------------------------------------------------------------------ - // select the backend type - - if(!strcmp(type, "graphite") || !strcmp(type, "graphite:plaintext")) { - - default_port = 2003; - backend_response_checker = process_graphite_response; - - if((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED) - backend_request_formatter = format_dimension_collected_graphite_plaintext; - else - backend_request_formatter = format_dimension_stored_graphite_plaintext; - - } - else if(!strcmp(type, "opentsdb") || !strcmp(type, "opentsdb:telnet")) { - - default_port = 4242; - backend_response_checker = process_opentsdb_response; - - if((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED) - backend_request_formatter = format_dimension_collected_opentsdb_telnet; - else - backend_request_formatter = format_dimension_stored_opentsdb_telnet; - - } - else if (!strcmp(type, "json") || !strcmp(type, "json:plaintext")) { - - default_port = 5448; - backend_response_checker = process_json_response; - - if ((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED) - backend_request_formatter = format_dimension_collected_json_plaintext; - else - backend_request_formatter = format_dimension_stored_json_plaintext; - - } - else { - error("BACKEND: Unknown backend type '%s'", type); - goto cleanup; - } - - if(backend_request_formatter == NULL || backend_response_checker == NULL) { - error("BACKEND: backend is misconfigured - disabling it."); - goto cleanup; - } - - - // ------------------------------------------------------------------------ - // prepare the charts for monitoring the backend operation - - struct rusage thread; - - collected_number - chart_buffered_metrics = 0, - chart_lost_metrics = 0, - chart_sent_metrics = 0, - chart_buffered_bytes = 0, - chart_received_bytes = 0, - chart_sent_bytes = 0, - chart_receptions = 0, - chart_transmission_successes = 0, - chart_transmission_failures = 0, - chart_data_lost_events = 0, - chart_lost_bytes = 0, - chart_backend_reconnects = 0, - chart_backend_latency = 0; - - RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", "backends", NULL, 130600, backend_update_every, RRDSET_TYPE_LINE); - rrddim_add(chart_metrics, "buffered", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_metrics, "lost", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_metrics, "sent", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - - RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", "backends", NULL, 130610, backend_update_every, RRDSET_TYPE_AREA); - rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_bytes, "lost", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_bytes, "sent", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE); - - RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", "backends", NULL, 130630, backend_update_every, RRDSET_TYPE_LINE); - rrddim_add(chart_ops, "write", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_ops, "discard", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_ops, "failure", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - rrddim_add(chart_ops, "read", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); - - /* - * this is misleading - we can only measure the time we need to send data - * this time is not related to the time required for the data to travel to - * the backend database and the time that server needed to process them - * - * issue #1432 and https://www.softlab.ntua.gr/facilities/documentation/unix/unix-socket-faq/unix-socket-faq-2.html - * - RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", "backends", NULL, 130620, backend_update_every, RRDSET_TYPE_AREA); - rrddim_add(chart_latency, "latency", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE); - */ - - RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", "backends", NULL, 130630, backend_update_every, RRDSET_TYPE_STACKED); - rrddim_add(chart_rusage, "user", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); - rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL); - - - // ------------------------------------------------------------------------ - // prepare the backend main loop - - info("BACKEND: configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, backend_update_every, hostname, backend_prefix); - - usec_t step_ut = backend_update_every * USEC_PER_SEC; - time_t after = now_realtime_sec(); - int failures = 0; - heartbeat_t hb; - heartbeat_init(&hb); - - while(!netdata_exit) { - - // ------------------------------------------------------------------------ - // Wait for the next iteration point. - - heartbeat_next(&hb, step_ut); - time_t before = now_realtime_sec(); - debug(D_BACKEND, "BACKEND: preparing buffer for timeframe %lu to %lu", (unsigned long)after, (unsigned long)before); - - // ------------------------------------------------------------------------ - // add to the buffer the data we need to send to the backend - - netdata_thread_disable_cancelability(); - - size_t count_hosts = 0; - size_t count_charts_total = 0; - size_t count_dims_total = 0; - - rrd_rdlock(); - RRDHOST *host; - rrdhost_foreach_read(host) { - if(unlikely(!rrdhost_flag_check(host, RRDHOST_FLAG_BACKEND_SEND|RRDHOST_FLAG_BACKEND_DONT_SEND))) { - char *name = (host == localhost)?"localhost":host->hostname; - if (!hosts_pattern || simple_pattern_matches(hosts_pattern, name)) { - rrdhost_flag_set(host, RRDHOST_FLAG_BACKEND_SEND); - info("enabled backend for host '%s'", name); - } - else { - rrdhost_flag_set(host, RRDHOST_FLAG_BACKEND_DONT_SEND); - info("disabled backend for host '%s'", name); - } - } - - if(unlikely(!rrdhost_flag_check(host, RRDHOST_FLAG_BACKEND_SEND))) - continue; - - rrdhost_rdlock(host); - - count_hosts++; - size_t count_charts = 0; - size_t count_dims = 0; - size_t count_dims_skipped = 0; - - const char *__hostname = (host == localhost)?hostname:host->hostname; - - RRDSET *st; - rrdset_foreach_read(st, host) { - if(likely(backends_can_send_rrdset(backend_options, st))) { - rrdset_rdlock(st); - - count_charts++; - - RRDDIM *rd; - rrddim_foreach_read(rd, st) { - if (likely(rd->last_collected_time.tv_sec >= after)) { - chart_buffered_metrics += backend_request_formatter(b, backend_prefix, host, __hostname, st, rd, after, before, backend_options); - count_dims++; - } - else { - debug(D_BACKEND, "BACKEND: not sending dimension '%s' of chart '%s' from host '%s', its last data collection (%lu) is not within our timeframe (%lu to %lu)", rd->id, st->id, __hostname, (unsigned long)rd->last_collected_time.tv_sec, (unsigned long)after, (unsigned long)before); - count_dims_skipped++; - } - } - - rrdset_unlock(st); - } - } - - debug(D_BACKEND, "BACKEND: sending host '%s', metrics of %zu dimensions, of %zu charts. Skipped %zu dimensions.", __hostname, count_dims, count_charts, count_dims_skipped); - count_charts_total += count_charts; - count_dims_total += count_dims; - - rrdhost_unlock(host); - } - rrd_unlock(); - - netdata_thread_enable_cancelability(); - - debug(D_BACKEND, "BACKEND: buffer has %zu bytes, added metrics for %zu dimensions, of %zu charts, from %zu hosts", buffer_strlen(b), count_dims_total, count_charts_total, count_hosts); - - // ------------------------------------------------------------------------ - - chart_buffered_bytes = (collected_number)buffer_strlen(b); - - // reset the monitoring chart counters - chart_received_bytes = - chart_sent_bytes = - chart_sent_metrics = - chart_lost_metrics = - chart_transmission_successes = - chart_transmission_failures = - chart_data_lost_events = - chart_lost_bytes = - chart_backend_reconnects = - chart_backend_latency = 0; - - if(unlikely(netdata_exit)) break; - - //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b)); // FIXME - //fprintf(stderr, "after = %lu, before = %lu\n", after, before); - - // prepare for the next iteration - // to add incrementally data to buffer - after = before; - - // ------------------------------------------------------------------------ - // if we are connected, receive a response, without blocking - - if(likely(sock != -1)) { - errno = 0; - - // loop through to collect all data - while(sock != -1 && errno != EWOULDBLOCK) { - buffer_need_bytes(response, 4096); - - ssize_t r = recv(sock, &response->buffer[response->len], response->size - response->len, MSG_DONTWAIT); - if(likely(r > 0)) { - // we received some data - response->len += r; - chart_received_bytes += r; - chart_receptions++; - } - else if(r == 0) { - error("BACKEND: '%s' closed the socket", destination); - close(sock); - sock = -1; - } - else { - // failed to receive data - if(errno != EAGAIN && errno != EWOULDBLOCK) { - error("BACKEND: cannot receive data from backend '%s'.", destination); - } - } - } - - // if we received data, process them - if(buffer_strlen(response)) - backend_response_checker(response); - } - - // ------------------------------------------------------------------------ - // if we are not connected, connect to a backend server - - if(unlikely(sock == -1)) { - usec_t start_ut = now_monotonic_usec(); - size_t reconnects = 0; - - sock = connect_to_one_of(destination, default_port, &timeout, &reconnects, NULL, 0); - - chart_backend_reconnects += reconnects; - chart_backend_latency += now_monotonic_usec() - start_ut; - } - - if(unlikely(netdata_exit)) break; - - // ------------------------------------------------------------------------ - // if we are connected, send our buffer to the backend server - - if(likely(sock != -1)) { - size_t len = buffer_strlen(b); - usec_t start_ut = now_monotonic_usec(); - int flags = 0; -#ifdef MSG_NOSIGNAL - flags += MSG_NOSIGNAL; -#endif - - ssize_t written = send(sock, buffer_tostring(b), len, flags); - chart_backend_latency += now_monotonic_usec() - start_ut; - if(written != -1 && (size_t)written == len) { - // we sent the data successfully - chart_transmission_successes++; - chart_sent_bytes += written; - chart_sent_metrics = chart_buffered_metrics; - - // reset the failures count - failures = 0; - - // empty the buffer - buffer_flush(b); - } - else { - // oops! we couldn't send (all or some of the) data - error("BACKEND: failed to write data to database backend '%s'. Willing to write %zu bytes, wrote %zd bytes. Will re-connect.", destination, len, written); - chart_transmission_failures++; - - if(written != -1) - chart_sent_bytes += written; - - // increment the counter we check for data loss - failures++; - - // close the socket - we will re-open it next time - close(sock); - sock = -1; - } - } - else { - error("BACKEND: failed to update database backend '%s'", destination); - chart_transmission_failures++; - - // increment the counter we check for data loss - failures++; - } - - if(failures > buffer_on_failures) { - // too bad! we are going to lose data - chart_lost_bytes += buffer_strlen(b); - error("BACKEND: reached %d backend failures. Flushing buffers to protect this host - this results in data loss on back-end server '%s'", failures, destination); - buffer_flush(b); - failures = 0; - chart_data_lost_events++; - chart_lost_metrics = chart_buffered_metrics; - } - - if(unlikely(netdata_exit)) break; - - // ------------------------------------------------------------------------ - // update the monitoring charts - - if(likely(chart_ops->counter_done)) rrdset_next(chart_ops); - rrddim_set(chart_ops, "read", chart_receptions); - rrddim_set(chart_ops, "write", chart_transmission_successes); - rrddim_set(chart_ops, "discard", chart_data_lost_events); - rrddim_set(chart_ops, "failure", chart_transmission_failures); - rrddim_set(chart_ops, "reconnect", chart_backend_reconnects); - rrdset_done(chart_ops); - - if(likely(chart_metrics->counter_done)) rrdset_next(chart_metrics); - rrddim_set(chart_metrics, "buffered", chart_buffered_metrics); - rrddim_set(chart_metrics, "lost", chart_lost_metrics); - rrddim_set(chart_metrics, "sent", chart_sent_metrics); - rrdset_done(chart_metrics); - - if(likely(chart_bytes->counter_done)) rrdset_next(chart_bytes); - rrddim_set(chart_bytes, "buffered", chart_buffered_bytes); - rrddim_set(chart_bytes, "lost", chart_lost_bytes); - rrddim_set(chart_bytes, "sent", chart_sent_bytes); - rrddim_set(chart_bytes, "received", chart_received_bytes); - rrdset_done(chart_bytes); - - /* - if(likely(chart_latency->counter_done)) rrdset_next(chart_latency); - rrddim_set(chart_latency, "latency", chart_backend_latency); - rrdset_done(chart_latency); - */ - - getrusage(RUSAGE_THREAD, &thread); - if(likely(chart_rusage->counter_done)) rrdset_next(chart_rusage); - rrddim_set(chart_rusage, "user", thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec); - rrddim_set(chart_rusage, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec); - rrdset_done(chart_rusage); - - if(likely(buffer_strlen(b) == 0)) - chart_buffered_metrics = 0; - - if(unlikely(netdata_exit)) break; - } - -cleanup: - if(sock != -1) - close(sock); - - buffer_free(b); - buffer_free(response); - - netdata_thread_cleanup_pop(1); - return NULL; -} |