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-rw-r--r--src/backends.c969
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;
-}