diff options
Diffstat (limited to '')
| -rw-r--r-- | src/rrdpush.c | 761 |
1 files changed, 761 insertions, 0 deletions
diff --git a/src/rrdpush.c b/src/rrdpush.c new file mode 100644 index 00000000..72e6d8a7 --- /dev/null +++ b/src/rrdpush.c @@ -0,0 +1,761 @@ +#include "common.h" + +/* + * rrdpush + * + * 3 threads are involved for all stream operations + * + * 1. a random data collection thread, calling rrdset_done_push() + * this is called for each chart. + * + * the output of this work is kept in a BUFFER in RRDHOST + * the sender thread is signalled via a pipe (also in RRDHOST) + * + * 2. a sender thread running at the sending netdata + * this is spawned automatically on the first chart to be pushed + * + * It tries to push the metrics to the remote netdata, as fast + * as possible (i.e. immediately after they are collected). + * + * 3. a receiver thread, running at the receiving netdata + * this is spawned automatically when the sender connects to + * the receiver. + * + */ + +#define START_STREAMING_PROMPT "Hit me baby, push them over..." + +int default_rrdpush_enabled = 0; +char *default_rrdpush_destination = NULL; +char *default_rrdpush_api_key = NULL; + +int rrdpush_init() { + default_rrdpush_enabled = appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "enabled", default_rrdpush_enabled); + default_rrdpush_destination = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "destination", ""); + default_rrdpush_api_key = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "api key", ""); + rrdhost_free_orphan_time = config_get_number(CONFIG_SECTION_GLOBAL, "cleanup orphan hosts after seconds", rrdhost_free_orphan_time); + + if(default_rrdpush_enabled && (!default_rrdpush_destination || !*default_rrdpush_destination || !default_rrdpush_api_key || !*default_rrdpush_api_key)) { + error("STREAM [send]: cannot enable sending thread - information is missing."); + default_rrdpush_enabled = 0; + } + + return default_rrdpush_enabled; +} + +#define CONNECTED_TO_SIZE 100 + +// data collection happens from multiple threads +// each of these threads calls rrdset_done() +// which in turn calls rrdset_done_push() +// which uses this pipe to notify the streaming thread +// that there are more data ready to be sent +#define PIPE_READ 0 +#define PIPE_WRITE 1 + +// to have the remote netdata re-sync the charts +// to its current clock, we send for this many +// iterations a BEGIN line without microseconds +// this is for the first iterations of each chart +static unsigned int remote_clock_resync_iterations = 60; + +#define rrdpush_lock(host) netdata_mutex_lock(&((host)->rrdpush_mutex)) +#define rrdpush_unlock(host) netdata_mutex_unlock(&((host)->rrdpush_mutex)) + +// checks if the current chart definition has been sent +static inline int need_to_send_chart_definition(RRDSET *st) { + RRDDIM *rd; + rrddim_foreach_read(rd, st) + if(!rd->exposed) + return 1; + + return 0; +} + +// sends the current chart definition +static inline void send_chart_definition(RRDSET *st) { + buffer_sprintf(st->rrdhost->rrdpush_buffer, "CHART '%s' '%s' '%s' '%s' '%s' '%s' '%s' %ld %d\n" + , st->id + , st->name + , st->title + , st->units + , st->family + , st->context + , rrdset_type_name(st->chart_type) + , st->priority + , st->update_every + ); + + RRDDIM *rd; + rrddim_foreach_read(rd, st) { + buffer_sprintf(st->rrdhost->rrdpush_buffer, "DIMENSION '%s' '%s' '%s' " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " '%s %s'\n" + , rd->id + , rd->name + , rrd_algorithm_name(rd->algorithm) + , rd->multiplier + , rd->divisor + , rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?"hidden":"" + , rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)?"noreset":"" + ); + rd->exposed = 1; + } +} + +// sends the current chart dimensions +static inline void send_chart_metrics(RRDSET *st) { + buffer_sprintf(st->rrdhost->rrdpush_buffer, "BEGIN %s %llu\n", st->id, (st->counter_done > remote_clock_resync_iterations)?st->usec_since_last_update:0); + + RRDDIM *rd; + rrddim_foreach_read(rd, st) { + if(rd->updated && rd->exposed) + buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n" + , rd->id + , rd->collected_value + ); + } + + buffer_strcat(st->rrdhost->rrdpush_buffer, "END\n"); +} + +void rrdpush_sender_thread_spawn(RRDHOST *host); + +void rrdset_done_push(RRDSET *st) { + RRDHOST *host = st->rrdhost; + + if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED))) + return; + + rrdpush_lock(host); + + if(unlikely(host->rrdpush_enabled && !host->rrdpush_spawn)) + rrdpush_sender_thread_spawn(host); + + if(unlikely(!host->rrdpush_buffer || !host->rrdpush_connected)) { + if(unlikely(!host->rrdpush_error_shown)) + error("STREAM %s [send]: not ready - discarding collected metrics.", host->hostname); + + host->rrdpush_error_shown = 1; + + rrdpush_unlock(host); + return; + } + else if(unlikely(host->rrdpush_error_shown)) { + info("STREAM %s [send]: ready - sending metrics...", host->hostname); + host->rrdpush_error_shown = 0; + } + + if(need_to_send_chart_definition(st)) + send_chart_definition(st); + + send_chart_metrics(st); + + // signal the sender there are more data + if(write(host->rrdpush_pipe[PIPE_WRITE], " ", 1) == -1) + error("STREAM %s [send]: cannot write to internal pipe", host->hostname); + + rrdpush_unlock(host); +} + +// ---------------------------------------------------------------------------- +// rrdpush sender thread + +// resets all the chart, so that their definitions +// will be resent to the central netdata +static void rrdpush_sender_thread_reset_all_charts(RRDHOST *host) { + rrdhost_rdlock(host); + + RRDSET *st; + rrdset_foreach_read(st, host) { + + // make it re-align the current time + // on the remote host + st->counter_done = 0; + + rrdset_rdlock(st); + + RRDDIM *rd; + rrddim_foreach_read(rd, st) + rd->exposed = 0; + + rrdset_unlock(st); + } + + rrdhost_unlock(host); +} + +static inline void rrdpush_sender_thread_data_flush(RRDHOST *host) { + rrdpush_lock(host); + + if(buffer_strlen(host->rrdpush_buffer)) + error("STREAM %s [send]: discarding %zu bytes of metrics already in the buffer.", host->hostname, buffer_strlen(host->rrdpush_buffer)); + + buffer_flush(host->rrdpush_buffer); + + rrdpush_sender_thread_reset_all_charts(host); + + rrdpush_unlock(host); +} + +static void rrdpush_sender_thread_cleanup_locked_all(RRDHOST *host) { + host->rrdpush_connected = 0; + + if(host->rrdpush_socket != -1) { + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + } + + // close the pipe + if(host->rrdpush_pipe[PIPE_READ] != -1) { + close(host->rrdpush_pipe[PIPE_READ]); + host->rrdpush_pipe[PIPE_READ] = -1; + } + + if(host->rrdpush_pipe[PIPE_WRITE] != -1) { + close(host->rrdpush_pipe[PIPE_WRITE]); + host->rrdpush_pipe[PIPE_WRITE] = -1; + } + + buffer_free(host->rrdpush_buffer); + host->rrdpush_buffer = NULL; + + host->rrdpush_spawn = 0; + + rrdhost_flag_set(host, RRDHOST_ORPHAN); +} + +void rrdpush_sender_thread_stop(RRDHOST *host) { + rrdpush_lock(host); + rrdhost_wrlock(host); + + if(host->rrdpush_spawn) { + info("STREAM %s [send]: stopping sending thread...", host->hostname); + pthread_cancel(host->rrdpush_thread); + rrdpush_sender_thread_cleanup_locked_all(host); + } + + rrdhost_unlock(host); + rrdpush_unlock(host); +} + +void *rrdpush_sender_thread(void *ptr) { + RRDHOST *host = (RRDHOST *)ptr; + + info("STREAM %s [send]: thread created (task id %d)", host->hostname, gettid()); + + if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel type to DEFERRED.", host->hostname); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname); + + int timeout = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "timeout seconds", 60); + int default_port = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "default port", 19999); + size_t max_size = (size_t)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "buffer size bytes", 1024 * 1024); + unsigned int reconnect_delay = (unsigned int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "reconnect delay seconds", 5); + remote_clock_resync_iterations = (unsigned int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "initial clock resync iterations", remote_clock_resync_iterations); + char connected_to[CONNECTED_TO_SIZE + 1] = ""; + + if(!host->rrdpush_enabled || !host->rrdpush_destination || !*host->rrdpush_destination || !host->rrdpush_api_key || !*host->rrdpush_api_key) + goto cleanup; + + // initialize rrdpush globals + host->rrdpush_buffer = buffer_create(1); + host->rrdpush_connected = 0; + if(pipe(host->rrdpush_pipe) == -1) fatal("STREAM %s [send]: cannot create required pipe.", host->hostname); + + // initialize local variables + size_t begin = 0; + size_t reconnects_counter = 0; + size_t sent_bytes = 0; + size_t sent_connection = 0; + + struct timeval tv = { + .tv_sec = timeout, + .tv_usec = 0 + }; + + struct pollfd fds[2], *ifd, *ofd; + nfds_t fdmax; + + ifd = &fds[0]; + ofd = &fds[1]; + + for(; host->rrdpush_enabled && !netdata_exit ;) { + + if(unlikely(host->rrdpush_socket == -1)) { + // stop appending data into rrdpush_buffer + // they will be lost, so there is no point to do it + host->rrdpush_connected = 0; + + info("STREAM %s [send to %s]: connecting...", host->hostname, host->rrdpush_destination); + host->rrdpush_socket = connect_to_one_of(host->rrdpush_destination, default_port, &tv, &reconnects_counter, connected_to, CONNECTED_TO_SIZE); + + if(unlikely(host->rrdpush_socket == -1)) { + error("STREAM %s [send to %s]: failed to connect", host->hostname, host->rrdpush_destination); + sleep(reconnect_delay); + continue; + } + + info("STREAM %s [send to %s]: initializing communication...", host->hostname, connected_to); + + char http[1000 + 1]; + snprintfz(http, 1000, + "STREAM key=%s&hostname=%s&machine_guid=%s&os=%s&update_every=%d HTTP/1.1\r\n" + "User-Agent: netdata-push-service/%s\r\n" + "Accept: */*\r\n\r\n" + , host->rrdpush_api_key + , host->hostname + , host->machine_guid + , host->os + , default_rrd_update_every + , program_version + ); + + if(send_timeout(host->rrdpush_socket, http, strlen(http), 0, timeout) == -1) { + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + error("STREAM %s [send to %s]: failed to send http header to netdata", host->hostname, connected_to); + sleep(reconnect_delay); + continue; + } + + info("STREAM %s [send to %s]: waiting response from remote netdata...", host->hostname, connected_to); + + if(recv_timeout(host->rrdpush_socket, http, 1000, 0, timeout) == -1) { + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + error("STREAM %s [send to %s]: failed to initialize communication", host->hostname, connected_to); + sleep(reconnect_delay); + continue; + } + + if(strncmp(http, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT))) { + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + error("STREAM %s [send to %s]: server is not replying properly.", host->hostname, connected_to); + sleep(reconnect_delay); + continue; + } + + info("STREAM %s [send to %s]: established communication - sending metrics...", host->hostname, connected_to); + + if(fcntl(host->rrdpush_socket, F_SETFL, O_NONBLOCK) < 0) + error("STREAM %s [send to %s]: cannot set non-blocking mode for socket.", host->hostname, connected_to); + + rrdpush_sender_thread_data_flush(host); + sent_connection = 0; + + // allow appending data into rrdpush_buffer + host->rrdpush_connected = 1; + } + + ifd->fd = host->rrdpush_pipe[PIPE_READ]; + ifd->events = POLLIN; + ifd->revents = 0; + + ofd->fd = host->rrdpush_socket; + ofd->revents = 0; + if(begin < buffer_strlen(host->rrdpush_buffer)) { + ofd->events = POLLOUT; + fdmax = 2; + } + else { + ofd->events = 0; + fdmax = 1; + } + + if(netdata_exit) break; + int retval = poll(fds, fdmax, timeout * 1000); + if(netdata_exit) break; + + if(unlikely(retval == -1)) { + if(errno == EAGAIN || errno == EINTR) + continue; + + error("STREAM %s [send to %s]: failed to poll().", host->hostname, connected_to); + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + break; + } + else if(unlikely(!retval)) { + // timeout + continue; + } + + if(ifd->revents & POLLIN) { + char buffer[1000 + 1]; + if(read(host->rrdpush_pipe[PIPE_READ], buffer, 1000) == -1) + error("STREAM %s [send to %s]: cannot read from internal pipe.", host->hostname, connected_to); + } + + if(ofd->revents & POLLOUT && begin < buffer_strlen(host->rrdpush_buffer)) { + + // BEGIN RRDPUSH LOCKED SESSION + + // during this session, data collectors + // will not be able to append data to our buffer + // but the socket is in non-blocking mode + // so, we will not block at send() + + if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname); + + rrdpush_lock(host); + + ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT); + if(ret == -1) { + if(errno != EAGAIN && errno != EINTR) { + error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection); + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + } + } + else { + sent_connection += ret; + sent_bytes += ret; + begin += ret; + if(begin == buffer_strlen(host->rrdpush_buffer)) { + // we send it all + + buffer_flush(host->rrdpush_buffer); + begin = 0; + } + } + + rrdpush_unlock(host); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname); + + // END RRDPUSH LOCKED SESSION + } + + // protection from overflow + if(host->rrdpush_buffer->len > max_size) { + errno = 0; + error("STREAM %s [send to %s]: too many data pending - buffer is %zu bytes long, %zu unsent - we have sent %zu bytes in total, %zu on this connection. Closing connection to flush the data.", host->hostname, connected_to, host->rrdpush_buffer->len, host->rrdpush_buffer->len - begin, sent_bytes, sent_connection); + if(host->rrdpush_socket != -1) { + close(host->rrdpush_socket); + host->rrdpush_socket = -1; + } + } + } + +cleanup: + debug(D_WEB_CLIENT, "STREAM %s [send]: sending thread exits.", host->hostname); + + if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname); + + rrdpush_lock(host); + rrdhost_wrlock(host); + rrdpush_sender_thread_cleanup_locked_all(host); + rrdhost_unlock(host); + rrdpush_unlock(host); + + if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname); + + pthread_exit(NULL); + return NULL; +} + + +// ---------------------------------------------------------------------------- +// rrdpush receiver thread + +int rrdpush_receive(int fd, const char *key, const char *hostname, const char *machine_guid, const char *os, int update_every, char *client_ip, char *client_port) { + RRDHOST *host; + int history = default_rrd_history_entries; + RRD_MEMORY_MODE mode = default_rrd_memory_mode; + int health_enabled = default_health_enabled; + int rrdpush_enabled = default_rrdpush_enabled; + char *rrdpush_destination = default_rrdpush_destination; + char *rrdpush_api_key = default_rrdpush_api_key; + time_t alarms_delay = 60; + + update_every = (int)appconfig_get_number(&stream_config, machine_guid, "update every", update_every); + if(update_every < 0) update_every = 1; + + history = (int)appconfig_get_number(&stream_config, key, "default history", history); + history = (int)appconfig_get_number(&stream_config, machine_guid, "history", history); + if(history < 5) history = 5; + + mode = rrd_memory_mode_id(appconfig_get(&stream_config, key, "default memory mode", rrd_memory_mode_name(mode))); + mode = rrd_memory_mode_id(appconfig_get(&stream_config, machine_guid, "memory mode", rrd_memory_mode_name(mode))); + + health_enabled = appconfig_get_boolean_ondemand(&stream_config, key, "health enabled by default", health_enabled); + health_enabled = appconfig_get_boolean_ondemand(&stream_config, machine_guid, "health enabled", health_enabled); + + alarms_delay = appconfig_get_number(&stream_config, key, "default postpone alarms on connect seconds", alarms_delay); + alarms_delay = appconfig_get_number(&stream_config, machine_guid, "postpone alarms on connect seconds", alarms_delay); + + rrdpush_enabled = appconfig_get_boolean(&stream_config, key, "default proxy enabled", rrdpush_enabled); + rrdpush_enabled = appconfig_get_boolean(&stream_config, machine_guid, "proxy enabled", rrdpush_enabled); + + rrdpush_destination = appconfig_get(&stream_config, key, "default proxy destination", rrdpush_destination); + rrdpush_destination = appconfig_get(&stream_config, machine_guid, "proxy destination", rrdpush_destination); + + rrdpush_api_key = appconfig_get(&stream_config, key, "default proxy api key", rrdpush_api_key); + rrdpush_api_key = appconfig_get(&stream_config, machine_guid, "proxy api key", rrdpush_api_key); + + if(!strcmp(machine_guid, "localhost")) + host = localhost; + else + host = rrdhost_find_or_create( + hostname + , machine_guid + , os + , update_every + , history + , mode + , (health_enabled != CONFIG_BOOLEAN_NO) + , (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key) + , rrdpush_destination + , rrdpush_api_key + ); + + if(!host) { + close(fd); + error("STREAM %s [receive from [%s]:%s]: failed to find/create host structure.", hostname, client_ip, client_port); + return 1; + } + +#ifdef NETDATA_INTERNAL_CHECKS + info("STREAM %s [receive from [%s]:%s]: client willing to stream metrics for host '%s' with machine_guid '%s': update every = %d, history = %ld, memory mode = %s, health %s" + , hostname + , client_ip + , client_port + , host->hostname + , host->machine_guid + , host->rrd_update_every + , host->rrd_history_entries + , rrd_memory_mode_name(host->rrd_memory_mode) + , (health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto") + ); +#endif // NETDATA_INTERNAL_CHECKS + + struct plugind cd = { + .enabled = 1, + .update_every = default_rrd_update_every, + .pid = 0, + .serial_failures = 0, + .successful_collections = 0, + .obsolete = 0, + .started_t = now_realtime_sec(), + .next = NULL, + }; + + // put the client IP and port into the buffers used by plugins.d + snprintfz(cd.id, CONFIG_MAX_NAME, "%s:%s", client_ip, client_port); + snprintfz(cd.filename, FILENAME_MAX, "%s:%s", client_ip, client_port); + snprintfz(cd.fullfilename, FILENAME_MAX, "%s:%s", client_ip, client_port); + snprintfz(cd.cmd, PLUGINSD_CMD_MAX, "%s:%s", client_ip, client_port); + + info("STREAM %s [receive from [%s]:%s]: initializing communication...", host->hostname, client_ip, client_port); + if(send_timeout(fd, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT), 0, 60) != strlen(START_STREAMING_PROMPT)) { + error("STREAM %s [receive from [%s]:%s]: cannot send ready command.", host->hostname, client_ip, client_port); + close(fd); + return 0; + } + + // remove the non-blocking flag from the socket + if(fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~O_NONBLOCK) == -1) + error("STREAM %s [receive from [%s]:%s]: cannot remove the non-blocking flag from socket %d", host->hostname, client_ip, client_port, fd); + + // convert the socket to a FILE * + FILE *fp = fdopen(fd, "r"); + if(!fp) { + error("STREAM %s [receive from [%s]:%s]: failed to get a FILE for FD %d.", host->hostname, client_ip, client_port, fd); + close(fd); + return 0; + } + + rrdhost_wrlock(host); + host->connected_senders++; + if(health_enabled != CONFIG_BOOLEAN_NO) + host->health_delay_up_to = now_realtime_sec() + alarms_delay; + rrdhost_unlock(host); + + // call the plugins.d processor to receive the metrics + info("STREAM %s [receive from [%s]:%s]: receiving metrics...", host->hostname, client_ip, client_port); + size_t count = pluginsd_process(host, &cd, fp, 1); + error("STREAM %s [receive from [%s]:%s]: disconnected (completed updates %zu).", host->hostname, client_ip, client_port, count); + + rrdhost_wrlock(host); + host->senders_disconnected_time = now_realtime_sec(); + host->connected_senders--; + if(!host->connected_senders) { + if(health_enabled == CONFIG_BOOLEAN_AUTO) + host->health_enabled = 0; + } + rrdhost_unlock(host); + + rrdpush_sender_thread_stop(host); + + // cleanup + fclose(fp); + + return (int)count; +} + +struct rrdpush_thread { + int fd; + char *key; + char *hostname; + char *machine_guid; + char *os; + char *client_ip; + char *client_port; + int update_every; +}; + +void *rrdpush_receiver_thread(void *ptr) { + struct rrdpush_thread *rpt = (struct rrdpush_thread *)ptr; + + if (pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0) + error("STREAM %s [receive]: cannot set pthread cancel type to DEFERRED.", rpt->hostname); + + if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0) + error("STREAM %s [receive]: cannot set pthread cancel state to ENABLE.", rpt->hostname); + + + info("STREAM %s [%s]:%s: receive thread created (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid()); + rrdpush_receive(rpt->fd, rpt->key, rpt->hostname, rpt->machine_guid, rpt->os, rpt->update_every, rpt->client_ip, rpt->client_port); + info("STREAM %s [receive from [%s]:%s]: receive thread ended (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid()); + + freez(rpt->key); + freez(rpt->hostname); + freez(rpt->machine_guid); + freez(rpt->os); + freez(rpt->client_ip); + freez(rpt->client_port); + freez(rpt); + + pthread_exit(NULL); + return NULL; +} + +void rrdpush_sender_thread_spawn(RRDHOST *host) { + rrdhost_wrlock(host); + + if(!host->rrdpush_spawn) { + if(pthread_create(&host->rrdpush_thread, NULL, rrdpush_sender_thread, (void *) host)) + error("STREAM %s [send]: failed to create new thread for client.", host->hostname); + + else if(pthread_detach(host->rrdpush_thread)) + error("STREAM %s [send]: cannot request detach newly created thread.", host->hostname); + + rrdhost_flag_clear(host, RRDHOST_ORPHAN); + host->rrdpush_spawn = 1; + } + + rrdhost_unlock(host); +} + +int rrdpush_receiver_thread_spawn(RRDHOST *host, struct web_client *w, char *url) { + (void)host; + + info("STREAM [receive from [%s]:%s]: new client connection.", w->client_ip, w->client_port); + + char *key = NULL, *hostname = NULL, *machine_guid = NULL, *os = "unknown"; + int update_every = default_rrd_update_every; + char buf[GUID_LEN + 1]; + + while(url) { + char *value = mystrsep(&url, "?&"); + if(!value || !*value) continue; + + char *name = mystrsep(&value, "="); + if(!name || !*name) continue; + if(!value || !*value) continue; + + if(!strcmp(name, "key")) + key = value; + else if(!strcmp(name, "hostname")) + hostname = value; + else if(!strcmp(name, "machine_guid")) + machine_guid = value; + else if(!strcmp(name, "update_every")) + update_every = (int)strtoul(value, NULL, 0); + else if(!strcmp(name, "os")) + os = value; + } + + if(!key || !*key) { + error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "You need an API key for this request."); + return 401; + } + + if(!hostname || !*hostname) { + error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "You need to send a hostname too."); + return 400; + } + + if(!machine_guid || !*machine_guid) { + error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "You need to send a machine GUID too."); + return 400; + } + + if(regenerate_guid(key, buf) == -1) { + error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID. Forbidding access.", w->client_ip, w->client_port, key); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "Your API key is invalid."); + return 401; + } + + if(regenerate_guid(machine_guid, buf) == -1) { + error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, key); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "Your machine GUID is invalid."); + return 404; + } + + if(!appconfig_get_boolean(&stream_config, key, "enabled", 0)) { + error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "Your API key is not permitted access."); + return 401; + } + + if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) { + error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid); + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "Your machine guide is not permitted access."); + return 404; + } + + struct rrdpush_thread *rpt = mallocz(sizeof(struct rrdpush_thread)); + rpt->fd = w->ifd; + rpt->key = strdupz(key); + rpt->hostname = strdupz(hostname); + rpt->machine_guid = strdupz(machine_guid); + rpt->os = strdupz(os); + rpt->client_ip = strdupz(w->client_ip); + rpt->client_port = strdupz(w->client_port); + rpt->update_every = update_every; + pthread_t thread; + + debug(D_SYSTEM, "STREAM [receive from [%s]:%s]: starting receiving thread.", w->client_ip, w->client_port); + + if(pthread_create(&thread, NULL, rrdpush_receiver_thread, (void *)rpt)) + error("STREAM [receive from [%s]:%s]: failed to create new thread for client.", w->client_ip, w->client_port); + + else if(pthread_detach(thread)) + error("STREAM [receive from [%s]:%s]: cannot request detach newly created thread.", w->client_ip, w->client_port); + + // prevent the caller from closing the streaming socket + if(w->ifd == w->ofd) + w->ifd = w->ofd = -1; + else + w->ifd = -1; + + buffer_flush(w->response.data); + return 200; +} |