X-Git-Url: https://arthur.barton.de/gitweb/?a=blobdiff_plain;f=src%2Fbackends.c;h=69a61414445a143d57c26790a09e9844bae96e4e;hb=becfbec9998a861afddc10e355a8cd4b184d5bed;hp=4bfeac43c662d452f668098ebc751ab4681d79fd;hpb=76fff8cf42adfc481b220efd960307823af59f1f;p=netdata.git diff --git a/src/backends.c b/src/backends.c index 4bfeac43..69a61414 100644 --- a/src/backends.c +++ b/src/backends.c @@ -2,9 +2,9 @@ #define BACKEND_SOURCE_DATA_AS_COLLECTED 0x00000001 #define BACKEND_SOURCE_DATA_AVERAGE 0x00000002 -#define BACKEND_SOURCE_DATA_SUM 0x00000003 +#define BACKEND_SOURCE_DATA_SUM 0x00000004 -int connect_to_socket4(const char *ip, int port) { +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); @@ -15,6 +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; @@ -37,7 +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; @@ -49,6 +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); @@ -78,7 +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; @@ -139,7 +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; } @@ -147,7 +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; } } @@ -158,7 +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, uint32_t options) { +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); @@ -210,41 +216,49 @@ static inline calculated_number backend_duration_average(RRDSET *st, RRDDIM *rd, return sum / (calculated_number)counter; } -static inline void 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) { +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; (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, 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, 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_duration_average(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); + 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, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options) { +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; (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, 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, 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_duration_average(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); + 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, const char *hostname, RRDSET *st, RRDDIM *rd, time_t after, time_t before, uint32_t options); + 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("BACKEND thread created with task id %d", gettid()); @@ -254,18 +268,29 @@ 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; - uint32_t options = BACKEND_SOURCE_DATA_AVERAGE; - int enabled = config_get_boolean("backend", "enable", 0); + 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", 30); + 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; @@ -302,16 +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; - info("BACKEND configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, frequency, hostname, prefix); - 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); @@ -320,9 +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; @@ -336,7 +433,7 @@ void *backends_main(void *ptr) { RRDDIM *rd; for(rd = st->dimensions; rd ;rd = rd->next) { if(rd->last_collected_time.tv_sec >= after) - formatter(b, prefix, &localhost, hostname, st, rd, after, before, options); + chart_buffered_metrics += formatter(b, prefix, &localhost, hostname, st, rd, after, before, options); } pthread_rwlock_unlock(&st->rwlock); @@ -346,12 +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; @@ -367,42 +481,118 @@ 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: