X-Git-Url: https://arthur.barton.de/gitweb/?a=blobdiff_plain;f=src%2Fbackends.c;h=69a61414445a143d57c26790a09e9844bae96e4e;hb=becfbec9998a861afddc10e355a8cd4b184d5bed;hp=ce2c26bb8278b0d92bff9f64981f3aa0056c5660;hpb=e17976fb86af30fd250aa352b361073e1807bc81;p=netdata.git diff --git a/src/backends.c b/src/backends.c index ce2c26bb..69a61414 100644 --- a/src/backends.c +++ b/src/backends.c @@ -1,6 +1,10 @@ #include "common.h" -int connect_to_socket4(const char *ip, int port) { +#define BACKEND_SOURCE_DATA_AS_COLLECTED 0x00000001 +#define BACKEND_SOURCE_DATA_AVERAGE 0x00000002 +#define BACKEND_SOURCE_DATA_SUM 0x00000004 + +int connect_to_socket4(const char *ip, int port, struct timeval *timeout) { int sock; debug(D_LISTENER, "IPv4 connecting to ip '%s' port %d", ip, port); @@ -11,6 +15,9 @@ int connect_to_socket4(const char *ip, int port) { return -1; } + if(setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)timeout, sizeof(struct timeval)) < 0) + error("Failed to set timeout on the socket to ip '%s' port %d", ip, port); + struct sockaddr_in name; memset(&name, 0, sizeof(struct sockaddr_in)); name.sin_family = AF_INET; @@ -33,7 +40,7 @@ int connect_to_socket4(const char *ip, int port) { return sock; } -int connect_to_socket6(const char *ip, int port) { +int connect_to_socket6(const char *ip, int port, struct timeval *timeout) { int sock = -1; int ipv6only = 1; @@ -45,6 +52,9 @@ int connect_to_socket6(const char *ip, int port) { return -1; } + if(setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)timeout, sizeof(struct timeval)) < 0) + error("Failed to set timeout on the socket to ip '%s' port %d", ip, port); + /* IPv6 only */ if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&ipv6only, sizeof(ipv6only)) != 0) error("Cannot set IPV6_V6ONLY on ip '%s' port's %d.", ip, port); @@ -74,7 +84,7 @@ int connect_to_socket6(const char *ip, int port) { } -static inline int connect_to_one(const char *definition, int default_port) { +static inline int connect_to_one(const char *definition, int default_port, struct timeval *timeout) { struct addrinfo hints; struct addrinfo *result = NULL, *rp = NULL; @@ -135,7 +145,7 @@ static inline int connect_to_one(const char *definition, int default_port) { struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr; inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN); rport = ntohs(sin->sin_port); - fd = connect_to_socket4(rip, rport); + fd = connect_to_socket4(rip, rport, timeout); break; } @@ -143,7 +153,7 @@ static inline int connect_to_one(const char *definition, int default_port) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) rp->ai_addr; inet_ntop(AF_INET6, &sin6->sin6_addr, rip, INET6_ADDRSTRLEN); rport = ntohs(sin6->sin6_port); - fd = connect_to_socket6(rip, rport); + fd = connect_to_socket6(rip, rport, timeout); break; } } @@ -154,7 +164,7 @@ static inline int connect_to_one(const char *definition, int default_port) { return fd; } -static inline calculated_number backend_duration_average(RRDSET *st, RRDDIM *rd, time_t after, time_t before) { +static inline calculated_number backend_calculate_value_from_stored_data(RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { time_t first_t = rrdset_first_entry_t(st); time_t last_t = rrdset_last_entry_t(st); @@ -197,47 +207,60 @@ static inline calculated_number backend_duration_average(RRDSET *st, RRDDIM *rd, counter++; } - if(!counter) + if(unlikely(!counter)) return NAN; + if(unlikely(options & BACKEND_SOURCE_DATA_SUM)) + return sum; + return sum / (calculated_number)counter; } -static inline void format_dimension_collected_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, RRDSET *st, RRDDIM *rd, time_t after, time_t before) { +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) { + (void)host; + (void)after; (void)before; - - time_t last = rd->last_collected_time.tv_sec; - if(likely(last > after)) - buffer_sprintf(b, "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n", prefix, host->hostname, st->id, rd->id, rd->last_collected_value, (uint32_t)last); + (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); + return 1; } -static inline void format_dimension_stored_graphite_plaintext(BUFFER *b, const char *prefix, RRDHOST *host, RRDSET *st, RRDDIM *rd, time_t after, time_t before) { - calculated_number value = backend_duration_average(st, rd, after, before); - if(!isnan(value)) - buffer_sprintf(b, "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n", prefix, host->hostname, st->id, rd->id, value, (uint32_t)before); +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) { + (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); + return 1; + } + return 0; } -static inline void format_dimension_collected_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, RRDSET *st, RRDDIM *rd, time_t after, time_t before) { +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) { + (void)host; + (void)after; (void)before; - - time_t last = rd->last_collected_time.tv_sec; - if(likely(last > after)) - buffer_sprintf(b, "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s\n", prefix, st->id, rd->id, (uint32_t)last, rd->last_collected_value, host->hostname); + (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); + return 1; } -static inline void format_dimension_stored_opentsdb_telnet(BUFFER *b, const char *prefix, RRDHOST *host, RRDSET *st, RRDDIM *rd, time_t after, time_t before) { - calculated_number value = backend_duration_average(st, rd, after, before); - 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, host->hostname); +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) { + (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); + return 1; + } + return 0; } void *backends_main(void *ptr) { (void)ptr; BUFFER *b = buffer_create(1); - void (*formatter)(BUFFER *b, const char *prefix, RRDHOST *host, RRDSET *st, RRDDIM *rd, time_t after, time_t before); + int (*formatter)(BUFFER *b, const char *prefix, RRDHOST *host, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options); - info("BACKENDs thread created with task id %d", gettid()); + info("BACKEND thread created with task id %d", gettid()); if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) error("Cannot set pthread cancel type to DEFERRED."); @@ -245,29 +268,56 @@ void *backends_main(void *ptr) { if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) error("Cannot set pthread cancel state to ENABLE."); + // ------------------------------------------------------------------------ + // collect configuration options + + struct timeval timeout = { + .tv_sec = 0, + .tv_usec = 0 + }; int default_port = 0; int sock = -1; - int enabled = config_get_boolean("backends", "enable", 0); - const char *source = config_get("backends", "data source", "as stored"); - const char *type = config_get("backends", "type", "graphite"); - const char *destination = config_get("backends", "destination", "localhost"); - const char *prefix = config_get("backends", "prefix", "netdata"); - int frequency = (int)config_get_number("backends", "update every", 30); - int buffer_on_failures = (int)config_get_number("backends", "buffer on failures", 10); - - if(!enabled) + 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); + + // ------------------------------------------------------------------------ + // validate configuration options + // and prepare for sending data to our backend + if(!enabled || frequency < 1) goto cleanup; + if(!strcmp(source, "as collected")) { + options = BACKEND_SOURCE_DATA_AS_COLLECTED; + } + else if(!strcmp(source, "average")) { + options = BACKEND_SOURCE_DATA_AVERAGE; + } + else if(!strcmp(source, "sum") || !strcmp(source, "volume")) { + options = BACKEND_SOURCE_DATA_SUM; + } + else { + error("Invalid data source method '%s' for backend given. Disabling backed.", source); + goto cleanup; + } + if(!strcmp(type, "graphite") || !strcmp(type, "graphite:plaintext")) { default_port = 2003; - if(!strcmp(source, "as collected")) + if(options == BACKEND_SOURCE_DATA_AS_COLLECTED) formatter = format_dimension_collected_graphite_plaintext; else formatter = format_dimension_stored_graphite_plaintext; } else if(!strcmp(type, "opentsdb") || !strcmp(type, "opentsdb:telnet")) { - default_port = 2003; - if(!strcmp(source, "as collected")) + default_port = 4242; + if(options == BACKEND_SOURCE_DATA_AS_COLLECTED) formatter = format_dimension_collected_opentsdb_telnet; else formatter = format_dimension_stored_opentsdb_telnet; @@ -277,14 +327,85 @@ 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 + + struct rusage thread; + + collected_number + chart_buffered_metrics = 0, + chart_lost_metrics = 0, + chart_sent_metrics = 0, + chart_buffered_bytes = 0, + chart_sent_bytes = 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_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_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); + } + + 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); + } + + 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_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); + } + + // ------------------------------------------------------------------------ + // 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, frequency, hostname, prefix); + unsigned long long step_ut = frequency * 1000000ULL; - unsigned long long random_ut = time_usec() % (step_ut / 2); - time_t before = (time_t)((time_usec() - step_ut) / 10000000ULL); + unsigned long long random_ut = now_realtime_usec() % (step_ut / 2); + time_t before = (time_t)((now_realtime_usec() - step_ut) / 10000000ULL); time_t after = before; int failures = 0; for(;;) { - unsigned long long now_ut = time_usec(); + // ------------------------------------------------------------------------ + // wait for the next iteration point + + unsigned long long now_ut = now_realtime_usec(); unsigned long long next_ut = now_ut - (now_ut % step_ut) + step_ut; before = (time_t)(next_ut / 1000000ULL); @@ -293,9 +414,12 @@ void *backends_main(void *ptr) { while(now_ut < next_ut) { sleep_usec(next_ut - now_ut); - now_ut = time_usec(); + now_ut = now_realtime_usec(); } + // ------------------------------------------------------------------------ + // add to the buffer the data we need to send to the backend + RRDSET *st; int pthreadoldcancelstate; @@ -307,8 +431,10 @@ void *backends_main(void *ptr) { pthread_rwlock_rdlock(&st->rwlock); RRDDIM *rd; - for(rd = st->dimensions; rd ;rd = rd->next) - formatter(b, prefix, &localhost, st, rd, after, before); + for(rd = st->dimensions; rd ;rd = rd->next) { + if(rd->last_collected_time.tv_sec >= after) + chart_buffered_metrics += formatter(b, prefix, &localhost, hostname, st, rd, after, before, options); + } pthread_rwlock_unlock(&st->rwlock); } @@ -317,12 +443,29 @@ void *backends_main(void *ptr) { if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0)) error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate); + chart_buffered_bytes = (collected_number)buffer_strlen(b); + + // reset the monitoring chart counters + 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)); + //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b)); // FIXME //fprintf(stderr, "after = %lu, before = %lu\n", after, before); + // ------------------------------------------------------------------------ + // connect to a backend server + if(unlikely(sock == -1)) { + unsigned long long start_ut = now_realtime_usec(); const char *s = destination; while(*s) { const char *e = s; @@ -338,49 +481,125 @@ void *backends_main(void *ptr) { char buf[e - s + 1]; strncpyz(buf, s, e - s); - sock = connect_to_one(buf, default_port); + chart_backend_reconnects++; + sock = connect_to_one(buf, default_port, &timeout); if(sock != -1) break; s = e; } + chart_backend_latency += now_realtime_usec() - start_ut; } if(unlikely(netdata_exit)) break; + // ------------------------------------------------------------------------ + // send our buffer to the backend server + if(likely(sock != -1)) { size_t len = buffer_strlen(b); - ssize_t written = write(sock, buffer_tostring(b), len); + unsigned long long start_ut = now_realtime_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; 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 { - failures++; + // oops! we couldn't send (all or some of the) data error("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; } + // 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 { - failures++; error("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("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(chart_ops->counter_done) rrdset_next(chart_ops); + 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(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); + rrddim_set(chart_bytes, "buffered", chart_buffered_bytes); + rrddim_set(chart_bytes, "lost", chart_lost_bytes); + rrddim_set(chart_bytes, "sent", chart_sent_bytes); + rrdset_done(chart_bytes); + + if(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); + 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); - info("BACKENDs thread exiting"); + info("BACKEND thread exiting"); pthread_exit(NULL); return NULL;