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-rw-r--r--src/backends.c556
1 files changed, 398 insertions, 158 deletions
diff --git a/src/backends.c b/src/backends.c
index 1272d047..3e385cab 100644
--- a/src/backends.c
+++ b/src/backends.c
@@ -1,16 +1,51 @@
#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.
+//
+
#define BACKEND_SOURCE_DATA_AS_COLLECTED 0x00000001
#define BACKEND_SOURCE_DATA_AVERAGE 0x00000002
#define BACKEND_SOURCE_DATA_SUM 0x00000004
-static inline calculated_number backend_calculate_value_from_stored_data(RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) {
+
+// ----------------------------------------------------------------------------
+// helper functions for backends
+
+// 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
+
+static 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
+) {
+ // 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 last_t = rrdset_last_entry_t(st);
- if(unlikely(before - after < st->update_every && after != after - after % st->update_every))
- // when st->update_every is bigger than the frequency we send data to backend
- // skip the iterations that are not aligned to the database
+ if(unlikely(before < first_t || after > last_t))
+ // the chart has not been updated in the wanted timeframe
return NAN;
// align the time-frame
@@ -22,7 +57,7 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET
after = first_t;
if(unlikely(after > before))
- // this can happen when the st->update_every > before - after
+ // this can happen when st->update_every > before - after
before = after;
if(unlikely(before > last_t))
@@ -36,14 +71,20 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET
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))) continue;
+
+ if(unlikely(!does_storage_number_exist(n))) {
+ // not collected
+ continue;
+ }
calculated_number value = unpack_storage_number(n);
sum += value;
+
counter++;
}
@@ -56,84 +97,295 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET
return sum / (calculated_number)counter;
}
-static inline int format_dimension_collected_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) {
+
+// 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("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;
- buffer_sprintf(b, "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n", prefix, hostname, st->id, rd->id, rd->last_collected_value, (uint32_t)rd->last_collected_time.tv_sec);
+
+ buffer_sprintf(
+ b
+ , "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n"
+ , prefix
+ , hostname
+ , st->id
+ , rd->id
+ , rd->last_collected_value
+ , (uint32_t)rd->last_collected_time.tv_sec
+ );
+
return 1;
}
-static inline int format_dimension_stored_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) {
+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;
+
calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options);
+
if(!isnan(value)) {
- buffer_sprintf(b, "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n", prefix, hostname, st->id, rd->id, value, (uint32_t) before);
+
+ buffer_sprintf(
+ b
+ , "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n"
+ , prefix
+ , hostname
+ , st->id
+ , rd->id
+ , value
+ , (uint32_t) before
+ );
+
return 1;
}
return 0;
}
-static inline int format_dimension_collected_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) {
+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;
- buffer_sprintf(b, "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s\n", prefix, st->id, rd->id, (uint32_t)rd->last_collected_time.tv_sec, rd->last_collected_value, hostname);
+
+ buffer_sprintf(
+ b
+ , "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s\n"
+ , prefix
+ , st->id
+ , rd->id
+ , (uint32_t)rd->last_collected_time.tv_sec
+ , rd->last_collected_value
+ , hostname
+ );
+
return 1;
}
-static inline int format_dimension_stored_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) {
+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;
+
calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options);
+
if(!isnan(value)) {
- buffer_sprintf(b, "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s\n", prefix, st->id, rd->id, (uint32_t) before, value, hostname);
+
+ buffer_sprintf(
+ b
+ , "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s\n"
+ , prefix
+ , st->id
+ , rd->id
+ , (uint32_t) before
+ , value
+ , hostname
+ );
+
return 1;
}
return 0;
}
-static inline int process_graphite_response(BUFFER *b) {
- char sample[1024];
- const char *s = buffer_tostring(b);
- char *d = sample, *e = &sample[sizeof(sample) - 1];
+static inline int process_opentsdb_response(BUFFER *b) {
+ return discard_response(b, "opentsdb");
+}
- for(; *s && d < e ;s++) {
- char c = *s;
- if(unlikely(!isprint(c))) c = ' ';
- *d++ = c;
- }
- *d = '\0';
- info("Received %zu bytes from graphite backend. Ignoring them. Sample: '%s'", buffer_strlen(b), sample);
- buffer_flush(b);
- return 0;
+// ----------------------------------------------------------------------------
+// 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;
+
+ buffer_sprintf(b, "{"
+ "\"prefix\":\"%s\","
+ "\"hostname\":\"%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,
+
+ 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 process_opentsdb_response(BUFFER *b) {
- char sample[1024];
- const char *s = buffer_tostring(b);
- char *d = sample, *e = &sample[sizeof(sample) - 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;
- for(; *s && d < e ;s++) {
- char c = *s;
- if(unlikely(!isprint(c))) c = ' ';
- *d++ = c;
- }
- *d = '\0';
+ calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options);
- info("Received %zu bytes from opentsdb backend. Ignoring them. Sample: '%s'", buffer_strlen(b), sample);
- buffer_flush(b);
+ if(!isnan(value)) {
+ buffer_sprintf(b, "{"
+ "\"prefix\":\"%s\","
+ "\"hostname\":\"%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,
+
+ st->id,
+ st->name,
+ st->family,
+ st->context,
+ st->type,
+ st->units,
+
+ rd->id,
+ rd->name,
+ value,
+
+ (uint32_t)before
+ );
+
+ return 1;
+ }
return 0;
}
+static inline int process_json_response(BUFFER *b) {
+ return discard_response(b, "json");
+}
+
+
+// ----------------------------------------------------------------------------
+// the backend thread
+
void *backends_main(void *ptr) {
+ int default_port = 0;
+ int sock = -1;
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
BUFFER *b = buffer_create(1), *response = buffer_create(1);
- int (*backend_request_formatter)(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) = NULL;
- int (*backend_response_checker)(BUFFER *b) = NULL;
+ 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;
info("BACKEND thread created with task id %d", gettid());
@@ -150,22 +402,21 @@ void *backends_main(void *ptr) {
.tv_sec = 0,
.tv_usec = 0
};
- int default_port = 0;
- int sock = -1;
uint32_t options;
- int enabled = config_get_boolean("backend", "enabled", 0);
- const char *source = config_get("backend", "data source", "average");
- const char *type = config_get("backend", "type", "graphite");
- const char *destination = config_get("backend", "destination", "localhost");
- const char *prefix = config_get("backend", "prefix", "netdata");
- const char *hostname = config_get("backend", "hostname", localhost.hostname);
- int frequency = (int)config_get_number("backend", "update every", 10);
- int buffer_on_failures = (int)config_get_number("backend", "buffer on failures", 10);
- long timeoutms = config_get_number("backend", "timeout ms", frequency * 2 * 1000);
+ 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");
+ const char *prefix = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata");
+ const char *hostname = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname);
+ int frequency = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", 10);
+ 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", frequency * 2 * 1000);
// ------------------------------------------------------------------------
// validate configuration options
// and prepare for sending data to our backend
+
if(!enabled || frequency < 1)
goto cleanup;
@@ -183,23 +434,49 @@ void *backends_main(void *ptr) {
goto cleanup;
}
+ if(timeoutms < 1) {
+ error("BACKED invalid timeout %ld ms given. Assuming %d ms.", timeoutms, frequency * 2 * 1000);
+ timeoutms = frequency * 2 * 1000;
+ }
+ timeout.tv_sec = (timeoutms * 1000) / 1000000;
+ timeout.tv_usec = (timeoutms * 1000) % 1000000;
+
+
+ // ------------------------------------------------------------------------
+ // select the backend type
+
if(!strcmp(type, "graphite") || !strcmp(type, "graphite:plaintext")) {
+
default_port = 2003;
+ backend_response_checker = process_graphite_response;
+
if(options == BACKEND_SOURCE_DATA_AS_COLLECTED)
backend_request_formatter = format_dimension_collected_graphite_plaintext;
else
backend_request_formatter = format_dimension_stored_graphite_plaintext;
- backend_response_checker = process_graphite_response;
}
else if(!strcmp(type, "opentsdb") || !strcmp(type, "opentsdb:telnet")) {
+
default_port = 4242;
+ backend_response_checker = process_opentsdb_response;
+
if(options == BACKEND_SOURCE_DATA_AS_COLLECTED)
backend_request_formatter = format_dimension_collected_opentsdb_telnet;
else
backend_request_formatter = format_dimension_stored_opentsdb_telnet;
- backend_response_checker = process_opentsdb_response;
+ }
+ else if (!strcmp(type, "json") || !strcmp(type, "json:plaintext")) {
+
+ default_port = 5448;
+ backend_response_checker = process_json_response;
+
+ if (options == BACKEND_SOURCE_DATA_AS_COLLECTED)
+ backend_request_formatter = format_dimension_collected_json_plaintext;
+ else
+ backend_request_formatter = format_dimension_stored_json_plaintext;
+
}
else {
error("Unknown backend type '%s'", type);
@@ -211,15 +488,9 @@ void *backends_main(void *ptr) {
goto cleanup;
}
- if(timeoutms < 1) {
- error("BACKED invalid timeout %ld ms given. Assuming %d ms.", timeoutms, frequency * 2 * 1000);
- timeoutms = frequency * 2 * 1000;
- }
- timeout.tv_sec = (timeoutms * 1000) / 1000000;
- timeout.tv_usec = (timeoutms * 1000) % 1000000;
// ------------------------------------------------------------------------
- // prepare the charts for monitoring the backend
+ // prepare the charts for monitoring the backend operation
struct rusage thread;
@@ -238,32 +509,23 @@ void *backends_main(void *ptr) {
chart_backend_reconnects = 0,
chart_backend_latency = 0;
- RRDSET *chart_metrics = rrdset_find("netdata.backend_metrics");
- if(!chart_metrics) {
- chart_metrics = rrdset_create("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", 130600, frequency, RRDSET_TYPE_LINE);
- rrddim_add(chart_metrics, "buffered", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_metrics, "lost", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_metrics, "sent", NULL, 1, 1, RRDDIM_ABSOLUTE);
- }
+ RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", 130600, frequency, 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_find("netdata.backend_bytes");
- if(!chart_bytes) {
- chart_bytes = rrdset_create("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", 130610, frequency, RRDSET_TYPE_AREA);
- rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRDDIM_ABSOLUTE);
- rrddim_add(chart_bytes, "lost", NULL, 1, 1024, RRDDIM_ABSOLUTE);
- rrddim_add(chart_bytes, "sent", NULL, 1, 1024, RRDDIM_ABSOLUTE);
- rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRDDIM_ABSOLUTE);
- }
+ RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", 130610, frequency, 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_find("netdata.backend_ops");
- if(!chart_ops) {
- chart_ops = rrdset_create("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", 130630, frequency, RRDSET_TYPE_LINE);
- rrddim_add(chart_ops, "write", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_ops, "discard", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_ops, "failure", NULL, 1, 1, RRDDIM_ABSOLUTE);
- rrddim_add(chart_ops, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
- }
+ RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", 130630, frequency, 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
@@ -272,19 +534,14 @@ void *backends_main(void *ptr) {
*
* issue #1432 and https://www.softlab.ntua.gr/facilities/documentation/unix/unix-socket-faq/unix-socket-faq-2.html
*
- RRDSET *chart_latency = rrdset_find("netdata.backend_latency");
- if(!chart_latency) {
- chart_latency = rrdset_create("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", 130620, frequency, RRDSET_TYPE_AREA);
- rrddim_add(chart_latency, "latency", NULL, 1, 1000, RRDDIM_ABSOLUTE);
- }
+ RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", 130620, frequency, RRDSET_TYPE_AREA);
+ rrddim_add(chart_latency, "latency", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
*/
- RRDSET *chart_rusage = rrdset_find("netdata.backend_thread_cpu");
- if(!chart_rusage) {
- chart_rusage = rrdset_create("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", 130630, frequency, RRDSET_TYPE_STACKED);
- rrddim_add(chart_rusage, "user", NULL, 1, 1000, RRDDIM_INCREMENTAL);
- rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
- }
+ RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", 130630, frequency, 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
@@ -292,49 +549,49 @@ void *backends_main(void *ptr) {
info("BACKEND configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, frequency, hostname, prefix);
usec_t step_ut = frequency * USEC_PER_SEC;
- usec_t random_ut = now_realtime_usec() % (step_ut / 2);
- time_t before = (time_t)((now_realtime_usec() - step_ut) / USEC_PER_SEC);
- time_t after = before;
+ time_t after = now_realtime_sec();
int failures = 0;
+ heartbeat_t hb;
+ heartbeat_init(&hb);
for(;;) {
- // ------------------------------------------------------------------------
- // wait for the next iteration point
- usec_t now_ut = now_realtime_usec();
- usec_t next_ut = now_ut - (now_ut % step_ut) + step_ut;
- before = (time_t)(next_ut / USEC_PER_SEC);
-
- // add a little delay (1/4 of the step) plus some randomness
- next_ut += (step_ut / 4) + random_ut;
+ // ------------------------------------------------------------------------
+ // Wait for the next iteration point.
+ heartbeat_next(&hb, step_ut);
+ time_t before = now_realtime_sec();
- while(now_ut < next_ut) {
- sleep_usec(next_ut - now_ut);
- now_ut = now_realtime_usec();
- }
// ------------------------------------------------------------------------
// add to the buffer the data we need to send to the backend
- RRDSET *st;
int pthreadoldcancelstate;
if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
error("Cannot set pthread cancel state to DISABLE.");
- rrdhost_rdlock(&localhost);
- for(st = localhost.rrdset_root; st ;st = st->next) {
- pthread_rwlock_rdlock(&st->rwlock);
+ rrd_rdlock();
+ RRDHOST *host;
+ rrdhost_foreach_read(host) {
+ if(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE)
+ continue;
- RRDDIM *rd;
- for(rd = st->dimensions; rd ;rd = rd->next) {
- if(rd->last_collected_time.tv_sec >= after)
- chart_buffered_metrics += backend_request_formatter(b, prefix, &localhost, hostname, st, rd, after, before, options);
- }
+ rrdhost_rdlock(host);
- pthread_rwlock_unlock(&st->rwlock);
+ RRDSET *st;
+ rrdset_foreach_read(st, host) {
+ rrdset_rdlock(st);
+
+ RRDDIM *rd;
+ rrddim_foreach_read(rd, st) {
+ if(rd->last_collected_time.tv_sec >= after)
+ chart_buffered_metrics += backend_request_formatter(b, prefix, host, (host == localhost)?hostname:host->hostname, st, rd, after, before, options);
+ }
+ rrdset_unlock(st);
+ }
+ rrdhost_unlock(host);
}
- rrdhost_unlock(&localhost);
+ rrd_unlock();
if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
@@ -360,6 +617,10 @@ void *backends_main(void *ptr) {
//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
@@ -399,28 +660,13 @@ void *backends_main(void *ptr) {
// if we are not connected, connect to a backend server
if(unlikely(sock == -1)) {
- usec_t start_ut = now_realtime_usec();
- const char *s = destination;
- while(*s) {
- const char *e = s;
-
- // skip separators, moving both s(tart) and e(nd)
- while(isspace(*e) || *e == ',') s = ++e;
-
- // move e(nd) to the first separator
- while(*e && !isspace(*e) && *e != ',') e++;
-
- // is there anything?
- if(!*s || s == e) break;
-
- char buf[e - s + 1];
- strncpyz(buf, s, e - s);
- chart_backend_reconnects++;
- sock = connect_to(buf, default_port, &timeout);
- if(sock != -1) break;
- s = e;
- }
- chart_backend_latency += now_realtime_usec() - start_ut;
+ 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;
@@ -430,14 +676,14 @@ void *backends_main(void *ptr) {
if(likely(sock != -1)) {
size_t len = buffer_strlen(b);
- usec_t start_ut = now_realtime_usec();
+ 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_realtime_usec() - start_ut;
+ chart_backend_latency += now_monotonic_usec() - start_ut;
if(written != -1 && (size_t)written == len) {
// we sent the data successfully
chart_transmission_successes++;
@@ -465,12 +711,6 @@ void *backends_main(void *ptr) {
close(sock);
sock = -1;
}
-
- // either the buffer is empty
- // or is holding the data we couldn't send
- // so, make sure the next iteration will continue
- // from where we are now
- after = before;
}
else {
error("Failed to update database backend '%s'", destination);
@@ -495,7 +735,7 @@ void *backends_main(void *ptr) {
// ------------------------------------------------------------------------
// update the monitoring charts
- if(chart_ops->counter_done) rrdset_next(chart_ops);
+ 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);
@@ -503,13 +743,13 @@ void *backends_main(void *ptr) {
rrddim_set(chart_ops, "reconnect", chart_backend_reconnects);
rrdset_done(chart_ops);
- if(chart_metrics->counter_done) rrdset_next(chart_metrics);
+ 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(chart_bytes->counter_done) rrdset_next(chart_bytes);
+ 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);
@@ -517,13 +757,13 @@ void *backends_main(void *ptr) {
rrdset_done(chart_bytes);
/*
- if(chart_latency->counter_done) rrdset_next(chart_latency);
+ 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(chart_rusage->counter_done) rrdset_next(chart_rusage);
+ 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 20:26:05 +0000