diff options
Diffstat (limited to 'src/rrdpush.c')
| -rw-r--r-- | src/rrdpush.c | 1160 |
1 files changed, 0 insertions, 1160 deletions
diff --git a/src/rrdpush.c b/src/rrdpush.c deleted file mode 100644 index 8f71c6d4..00000000 --- a/src/rrdpush.c +++ /dev/null @@ -1,1160 +0,0 @@ -#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..." - -typedef enum { - RRDPUSH_MULTIPLE_CONNECTIONS_ALLOW, - RRDPUSH_MULTIPLE_CONNECTIONS_DENY_NEW -} RRDPUSH_MULTIPLE_CONNECTIONS_STRATEGY; - -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 -unsigned int remote_clock_resync_iterations = 60; - -#define rrdpush_buffer_lock(host) netdata_mutex_lock(&((host)->rrdpush_sender_buffer_mutex)) -#define rrdpush_buffer_unlock(host) netdata_mutex_unlock(&((host)->rrdpush_sender_buffer_mutex)) - -// checks if the current chart definition has been sent -static inline int need_to_send_chart_definition(RRDSET *st) { - rrdset_check_rdlock(st); - - if(unlikely(!(rrdset_flag_check(st, RRDSET_FLAG_EXPOSED_UPSTREAM)))) - return 1; - - RRDDIM *rd; - rrddim_foreach_read(rd, st) - if(unlikely(!rd->exposed)) - return 1; - - return 0; -} - -// sends the current chart definition -static inline void rrdpush_send_chart_definition_nolock(RRDSET *st) { - RRDHOST *host = st->rrdhost; - - rrdset_flag_set(st, RRDSET_FLAG_EXPOSED_UPSTREAM); - - // send the chart - buffer_sprintf( - host->rrdpush_sender_buffer - , "CHART \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" %ld %d \"%s %s %s %s\" \"%s\" \"%s\"\n" - , st->id - , st->name - , st->title - , st->units - , st->family - , st->context - , rrdset_type_name(st->chart_type) - , st->priority - , st->update_every - , rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)?"obsolete":"" - , rrdset_flag_check(st, RRDSET_FLAG_DETAIL)?"detail":"" - , rrdset_flag_check(st, RRDSET_FLAG_STORE_FIRST)?"store_first":"" - , rrdset_flag_check(st, RRDSET_FLAG_HIDDEN)?"hidden":"" - , (st->plugin_name)?st->plugin_name:"" - , (st->module_name)?st->module_name:"" - ); - - // send the dimensions - RRDDIM *rd; - rrddim_foreach_read(rd, st) { - buffer_sprintf( - host->rrdpush_sender_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; - } - - // send the chart local custom variables - RRDSETVAR *rs; - for(rs = st->variables; rs ;rs = rs->next) { - if(unlikely(rs->options && RRDVAR_OPTION_ALLOCATED)) { - calculated_number *value = (calculated_number *) rs->value; - - buffer_sprintf( - host->rrdpush_sender_buffer - , "VARIABLE CHART %s = " CALCULATED_NUMBER_FORMAT "\n" - , rs->variable - , *value - ); - } - } - - st->upstream_resync_time = st->last_collected_time.tv_sec + (remote_clock_resync_iterations * st->update_every); -} - -// sends the current chart dimensions -static inline void rrdpush_send_chart_metrics_nolock(RRDSET *st) { - RRDHOST *host = st->rrdhost; - buffer_sprintf(host->rrdpush_sender_buffer, "BEGIN \"%s\" %llu\n", st->id, (st->upstream_resync_time > st->last_collected_time.tv_sec)?st->usec_since_last_update:0); - - RRDDIM *rd; - rrddim_foreach_read(rd, st) { - if(rd->updated && rd->exposed) - buffer_sprintf(host->rrdpush_sender_buffer - , "SET \"%s\" = " COLLECTED_NUMBER_FORMAT "\n" - , rd->id - , rd->collected_value - ); - } - - buffer_strcat(host->rrdpush_sender_buffer, "END\n"); -} - -static void rrdpush_sender_thread_spawn(RRDHOST *host); - -void rrdset_push_chart_definition(RRDSET *st) { - RRDHOST *host = st->rrdhost; - - rrdset_rdlock(st); - rrdpush_buffer_lock(host); - rrdpush_send_chart_definition_nolock(st); - rrdpush_buffer_unlock(host); - rrdset_unlock(st); -} - -void rrdset_done_push(RRDSET *st) { - RRDHOST *host = st->rrdhost; - - if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED))) - return; - - rrdpush_buffer_lock(host); - - if(unlikely(host->rrdpush_send_enabled && !host->rrdpush_sender_spawn)) - rrdpush_sender_thread_spawn(host); - - if(unlikely(!host->rrdpush_sender_buffer || !host->rrdpush_sender_connected)) { - if(unlikely(!host->rrdpush_sender_error_shown)) - error("STREAM %s [send]: not ready - discarding collected metrics.", host->hostname); - - host->rrdpush_sender_error_shown = 1; - - rrdpush_buffer_unlock(host); - return; - } - else if(unlikely(host->rrdpush_sender_error_shown)) { - info("STREAM %s [send]: sending metrics...", host->hostname); - host->rrdpush_sender_error_shown = 0; - } - - if(need_to_send_chart_definition(st)) - rrdpush_send_chart_definition_nolock(st); - - rrdpush_send_chart_metrics_nolock(st); - - // signal the sender there are more data - if(host->rrdpush_sender_pipe[PIPE_WRITE] != -1 && write(host->rrdpush_sender_pipe[PIPE_WRITE], " ", 1) == -1) - error("STREAM %s [send]: cannot write to internal pipe", host->hostname); - - rrdpush_buffer_unlock(host); -} - -// ---------------------------------------------------------------------------- -// rrdpush sender thread - -static inline void rrdpush_sender_add_host_variable_to_buffer_nolock(RRDHOST *host, RRDVAR *rv) { - calculated_number *value = (calculated_number *)rv->value; - - buffer_sprintf( - host->rrdpush_sender_buffer - , "VARIABLE HOST %s = " CALCULATED_NUMBER_FORMAT "\n" - , rv->name - , *value - ); - - debug(D_STREAM, "RRDVAR pushed HOST VARIABLE %s = " CALCULATED_NUMBER_FORMAT, rv->name, *value); -} - -void rrdpush_sender_send_this_host_variable_now(RRDHOST *host, RRDVAR *rv) { - if(host->rrdpush_send_enabled && host->rrdpush_sender_spawn && host->rrdpush_sender_connected) { - rrdpush_buffer_lock(host); - rrdpush_sender_add_host_variable_to_buffer_nolock(host, rv); - rrdpush_buffer_unlock(host); - } -} - -static int rrdpush_sender_thread_custom_host_variables_callback(void *rrdvar_ptr, void *host_ptr) { - RRDVAR *rv = (RRDVAR *)rrdvar_ptr; - RRDHOST *host = (RRDHOST *)host_ptr; - - if(unlikely(rv->type == RRDVAR_TYPE_CALCULATED_ALLOCATED)) { - rrdpush_sender_add_host_variable_to_buffer_nolock(host, rv); - - // return 1, so that the traversal will return the number of variables sent - return 1; - } - - // returning a negative number will break the traversal - return 0; -} - -static void rrdpush_sender_thread_send_custom_host_variables(RRDHOST *host) { - int ret = rrdvar_callback_for_all_host_variables(host, rrdpush_sender_thread_custom_host_variables_callback, host); - debug(D_STREAM, "RRDVAR sent %d VARIABLES", ret); -} - -// 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) { - rrdset_flag_clear(st, RRDSET_FLAG_EXPOSED_UPSTREAM); - - st->upstream_resync_time = 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_buffer_lock(host); - - if(buffer_strlen(host->rrdpush_sender_buffer)) - error("STREAM %s [send]: discarding %zu bytes of metrics already in the buffer.", host->hostname, buffer_strlen(host->rrdpush_sender_buffer)); - - buffer_flush(host->rrdpush_sender_buffer); - - rrdpush_sender_thread_reset_all_charts(host); - rrdpush_sender_thread_send_custom_host_variables(host); - - rrdpush_buffer_unlock(host); -} - -void rrdpush_sender_thread_stop(RRDHOST *host) { - rrdpush_buffer_lock(host); - rrdhost_wrlock(host); - - netdata_thread_t thr = 0; - - if(host->rrdpush_sender_spawn) { - info("STREAM %s [send]: signaling sending thread to stop...", host->hostname); - - // signal the thread that we want to join it - host->rrdpush_sender_join = 1; - - // copy the thread id, so that we will be waiting for the right one - // even if a new one has been spawn - thr = host->rrdpush_sender_thread; - - // signal it to cancel - netdata_thread_cancel(host->rrdpush_sender_thread); - } - - rrdhost_unlock(host); - rrdpush_buffer_unlock(host); - - if(thr != 0) { - info("STREAM %s [send]: waiting for the sending thread to stop...", host->hostname); - void *result; - netdata_thread_join(thr, &result); - info("STREAM %s [send]: sending thread has exited.", host->hostname); - } -} - -static inline void rrdpush_sender_thread_close_socket(RRDHOST *host) { - host->rrdpush_sender_connected = 0; - - if(host->rrdpush_sender_socket != -1) { - close(host->rrdpush_sender_socket); - host->rrdpush_sender_socket = -1; - } -} - -static int rrdpush_sender_thread_connect_to_master(RRDHOST *host, int default_port, int timeout, size_t *reconnects_counter, char *connected_to, size_t connected_to_size) { - struct timeval tv = { - .tv_sec = timeout, - .tv_usec = 0 - }; - - // make sure the socket is closed - rrdpush_sender_thread_close_socket(host); - - debug(D_STREAM, "STREAM: Attempting to connect..."); - info("STREAM %s [send to %s]: connecting...", host->hostname, host->rrdpush_send_destination); - - host->rrdpush_sender_socket = connect_to_one_of( - host->rrdpush_send_destination - , default_port - , &tv - , reconnects_counter - , connected_to - , connected_to_size - ); - - if(unlikely(host->rrdpush_sender_socket == -1)) { - error("STREAM %s [send to %s]: failed to connect", host->hostname, host->rrdpush_send_destination); - return 0; - } - - info("STREAM %s [send to %s]: initializing communication...", host->hostname, connected_to); - - #define HTTP_HEADER_SIZE 8192 - char http[HTTP_HEADER_SIZE + 1]; - snprintfz(http, HTTP_HEADER_SIZE, - "STREAM key=%s&hostname=%s®istry_hostname=%s&machine_guid=%s&update_every=%d&os=%s&timezone=%s&tags=%s HTTP/1.1\r\n" - "User-Agent: %s/%s\r\n" - "Accept: */*\r\n\r\n" - , host->rrdpush_send_api_key - , host->hostname - , host->registry_hostname - , host->machine_guid - , default_rrd_update_every - , host->os - , host->timezone - , (host->tags)?host->tags:"" - , host->program_name - , host->program_version - ); - - if(send_timeout(host->rrdpush_sender_socket, http, strlen(http), 0, timeout) == -1) { - error("STREAM %s [send to %s]: failed to send HTTP header to remote netdata.", host->hostname, connected_to); - rrdpush_sender_thread_close_socket(host); - return 0; - } - - info("STREAM %s [send to %s]: waiting response from remote netdata...", host->hostname, connected_to); - - if(recv_timeout(host->rrdpush_sender_socket, http, HTTP_HEADER_SIZE, 0, timeout) == -1) { - error("STREAM %s [send to %s]: remote netdata does not respond.", host->hostname, connected_to); - rrdpush_sender_thread_close_socket(host); - return 0; - } - - if(strncmp(http, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT)) != 0) { - error("STREAM %s [send to %s]: server is not replying properly (is it a netdata?).", host->hostname, connected_to); - rrdpush_sender_thread_close_socket(host); - return 0; - } - - info("STREAM %s [send to %s]: established communication - ready to send metrics...", host->hostname, connected_to); - - if(sock_setnonblock(host->rrdpush_sender_socket) < 0) - error("STREAM %s [send to %s]: cannot set non-blocking mode for socket.", host->hostname, connected_to); - - if(sock_enlarge_out(host->rrdpush_sender_socket) < 0) - error("STREAM %s [send to %s]: cannot enlarge the socket buffer.", host->hostname, connected_to); - - debug(D_STREAM, "STREAM: Connected on fd %d...", host->rrdpush_sender_socket); - - return 1; -} - -static void rrdpush_sender_thread_cleanup_callback(void *ptr) { - RRDHOST *host = (RRDHOST *)ptr; - - rrdpush_buffer_lock(host); - rrdhost_wrlock(host); - - info("STREAM %s [send]: sending thread cleans up...", host->hostname); - - rrdpush_sender_thread_close_socket(host); - - // close the pipe - if(host->rrdpush_sender_pipe[PIPE_READ] != -1) { - close(host->rrdpush_sender_pipe[PIPE_READ]); - host->rrdpush_sender_pipe[PIPE_READ] = -1; - } - - if(host->rrdpush_sender_pipe[PIPE_WRITE] != -1) { - close(host->rrdpush_sender_pipe[PIPE_WRITE]); - host->rrdpush_sender_pipe[PIPE_WRITE] = -1; - } - - buffer_free(host->rrdpush_sender_buffer); - host->rrdpush_sender_buffer = NULL; - - if(!host->rrdpush_sender_join) { - info("STREAM %s [send]: sending thread detaches itself.", host->hostname); - netdata_thread_detach(netdata_thread_self()); - } - - host->rrdpush_sender_spawn = 0; - - info("STREAM %s [send]: sending thread now exits.", host->hostname); - - rrdhost_unlock(host); - rrdpush_buffer_unlock(host); -} - -void *rrdpush_sender_thread(void *ptr) { - RRDHOST *host = (RRDHOST *)ptr; - - if(!host->rrdpush_send_enabled || !host->rrdpush_send_destination || !*host->rrdpush_send_destination || !host->rrdpush_send_api_key || !*host->rrdpush_send_api_key) { - error("STREAM %s [send]: thread created (task id %d), but host has streaming disabled.", host->hostname, gettid()); - return NULL; - } - - info("STREAM %s [send]: thread created (task id %d)", host->hostname, gettid()); - - 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] = ""; - - // initialize rrdpush globals - host->rrdpush_sender_buffer = buffer_create(1); - host->rrdpush_sender_connected = 0; - if(pipe(host->rrdpush_sender_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_bytes_on_this_connection = 0; - - - time_t last_sent_t = 0; - struct pollfd fds[2], *ifd, *ofd; - nfds_t fdmax; - - ifd = &fds[0]; - ofd = &fds[1]; - - size_t not_connected_loops = 0; - - netdata_thread_cleanup_push(rrdpush_sender_thread_cleanup_callback, host); - - for(; host->rrdpush_send_enabled && !netdata_exit ;) { - // check for outstanding cancellation requests - netdata_thread_testcancel(); - - // if we don't have socket open, lets wait a bit - if(unlikely(host->rrdpush_sender_socket == -1)) { - if(not_connected_loops == 0 && sent_bytes_on_this_connection > 0) { - // fast re-connection on first disconnect - sleep_usec(USEC_PER_MS * 500); // milliseconds - } - else { - // slow re-connection on repeating errors - sleep_usec(USEC_PER_SEC * reconnect_delay); // seconds - } - - if(rrdpush_sender_thread_connect_to_master(host, default_port, timeout, &reconnects_counter, connected_to, CONNECTED_TO_SIZE)) { - last_sent_t = now_monotonic_sec(); - - // reset the buffer, to properly send charts and metrics - rrdpush_sender_thread_data_flush(host); - - // make sure the next reconnection will be immediate - not_connected_loops = 0; - - // reset the bytes we have sent for this session - sent_bytes_on_this_connection = 0; - - // let the data collection threads know we are ready - host->rrdpush_sender_connected = 1; - } - else { - // increase the failed connections counter - not_connected_loops++; - - // reset the number of bytes sent - sent_bytes_on_this_connection = 0; - } - - // loop through - continue; - } - else if(unlikely(now_monotonic_sec() - last_sent_t > timeout)) { - error("STREAM %s [send to %s]: could not send metrics for %d seconds - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, timeout, sent_bytes_on_this_connection); - rrdpush_sender_thread_close_socket(host); - } - - ifd->fd = host->rrdpush_sender_pipe[PIPE_READ]; - ifd->events = POLLIN; - ifd->revents = 0; - - ofd->fd = host->rrdpush_sender_socket; - ofd->revents = 0; - if(ofd->fd != -1 && begin < buffer_strlen(host->rrdpush_sender_buffer)) { - debug(D_STREAM, "STREAM: Requesting data output on streaming socket %d...", ofd->fd); - ofd->events = POLLOUT; - fdmax = 2; - } - else { - debug(D_STREAM, "STREAM: Not requesting data output on streaming socket %d (nothing to send now)...", ofd->fd); - ofd->events = 0; - fdmax = 1; - } - - debug(D_STREAM, "STREAM: Waiting for poll() events (current buffer length %zu bytes)...", buffer_strlen(host->rrdpush_sender_buffer)); - if(unlikely(netdata_exit)) break; - int retval = poll(fds, fdmax, 1000); - if(unlikely(netdata_exit)) break; - - if(unlikely(retval == -1)) { - debug(D_STREAM, "STREAM: poll() failed (current buffer length %zu bytes)...", buffer_strlen(host->rrdpush_sender_buffer)); - - if(errno == EAGAIN || errno == EINTR) { - debug(D_STREAM, "STREAM: poll() failed with EAGAIN or EINTR..."); - } - else { - error("STREAM %s [send to %s]: failed to poll(). Closing socket.", host->hostname, connected_to); - rrdpush_sender_thread_close_socket(host); - } - - continue; - } - else if(likely(retval)) { - if (ifd->revents & POLLIN || ifd->revents & POLLPRI) { - debug(D_STREAM, "STREAM: Data added to send buffer (current buffer length %zu bytes)...", buffer_strlen(host->rrdpush_sender_buffer)); - - char buffer[1000 + 1]; - if (read(host->rrdpush_sender_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) { - if (begin < buffer_strlen(host->rrdpush_sender_buffer)) { - debug(D_STREAM, "STREAM: Sending data (current buffer length %zu bytes, begin = %zu)...", buffer_strlen(host->rrdpush_sender_buffer), begin); - - // 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() - - netdata_thread_disable_cancelability(); - - debug(D_STREAM, "STREAM: Getting exclusive lock on host..."); - rrdpush_buffer_lock(host); - - debug(D_STREAM, "STREAM: Sending data, starting from %zu, size %zu...", begin, buffer_strlen(host->rrdpush_sender_buffer)); - ssize_t ret = send(host->rrdpush_sender_socket, &host->rrdpush_sender_buffer->buffer[begin], buffer_strlen(host->rrdpush_sender_buffer) - begin, MSG_DONTWAIT); - if (unlikely(ret == -1)) { - if (errno != EAGAIN && errno != EINTR && errno != EWOULDBLOCK) { - debug(D_STREAM, "STREAM: Send failed - closing socket..."); - 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_bytes_on_this_connection); - rrdpush_sender_thread_close_socket(host); - } - else { - debug(D_STREAM, "STREAM: Send failed - will retry..."); - } - } - else if (likely(ret > 0)) { - // DEBUG - dump the string to see it - //char c = host->rrdpush_sender_buffer->buffer[begin + ret]; - //host->rrdpush_sender_buffer->buffer[begin + ret] = '\0'; - //debug(D_STREAM, "STREAM: sent from %zu to %zd:\n%s\n", begin, ret, &host->rrdpush_sender_buffer->buffer[begin]); - //host->rrdpush_sender_buffer->buffer[begin + ret] = c; - - sent_bytes_on_this_connection += ret; - sent_bytes += ret; - begin += ret; - - if (begin == buffer_strlen(host->rrdpush_sender_buffer)) { - // we send it all - - debug(D_STREAM, "STREAM: Sent %zd bytes (the whole buffer)...", ret); - buffer_flush(host->rrdpush_sender_buffer); - begin = 0; - } - else { - debug(D_STREAM, "STREAM: Sent %zd bytes (part of the data buffer)...", ret); - } - - last_sent_t = now_monotonic_sec(); - } - else { - debug(D_STREAM, "STREAM: send() returned %zd - closing the socket...", ret); - error("STREAM %s [send to %s]: failed to send metrics (send() returned %zd) - closing connection - we have sent %zu bytes on this connection.", - host->hostname, connected_to, ret, sent_bytes_on_this_connection); - rrdpush_sender_thread_close_socket(host); - } - - debug(D_STREAM, "STREAM: Releasing exclusive lock on host..."); - rrdpush_buffer_unlock(host); - - netdata_thread_enable_cancelability(); - - // END RRDPUSH LOCKED SESSION - } - else { - debug(D_STREAM, "STREAM: we have sent the entire buffer, but we received POLLOUT..."); - } - } - - if(host->rrdpush_sender_socket != -1) { - char *error = NULL; - - if (unlikely(ofd->revents & POLLERR)) - error = "socket reports errors (POLLERR)"; - - else if (unlikely(ofd->revents & POLLHUP)) - error = "connection closed by remote end (POLLHUP)"; - - else if (unlikely(ofd->revents & POLLNVAL)) - error = "connection is invalid (POLLNVAL)"; - - if(unlikely(error)) { - debug(D_STREAM, "STREAM: %s - closing socket...", error); - error("STREAM %s [send to %s]: %s - reopening socket - we have sent %zu bytes on this connection.", host->hostname, connected_to, error, sent_bytes_on_this_connection); - rrdpush_sender_thread_close_socket(host); - } - } - } - else { - debug(D_STREAM, "STREAM: poll() timed out."); - } - - // protection from overflow - if(buffer_strlen(host->rrdpush_sender_buffer) > max_size) { - debug(D_STREAM, "STREAM: Buffer is too big (%zu bytes), bigger than the max (%zu) - flushing it...", buffer_strlen(host->rrdpush_sender_buffer), 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_sender_buffer->len, host->rrdpush_sender_buffer->len - begin, sent_bytes, sent_bytes_on_this_connection); - rrdpush_sender_thread_close_socket(host); - } - } - - netdata_thread_cleanup_pop(1); - return NULL; -} - - -// ---------------------------------------------------------------------------- -// rrdpush receiver thread - -static void log_stream_connection(const char *client_ip, const char *client_port, const char *api_key, const char *machine_guid, const char *host, const char *msg) { - log_access("STREAM: %d '[%s]:%s' '%s' host '%s' api key '%s' machine guid '%s'", gettid(), client_ip, client_port, msg, host, api_key, machine_guid); -} - -static RRDPUSH_MULTIPLE_CONNECTIONS_STRATEGY get_multiple_connections_strategy(struct config *c, const char *section, const char *name, RRDPUSH_MULTIPLE_CONNECTIONS_STRATEGY def) { - char *value; - switch(def) { - default: - case RRDPUSH_MULTIPLE_CONNECTIONS_ALLOW: - value = "allow"; - break; - - case RRDPUSH_MULTIPLE_CONNECTIONS_DENY_NEW: - value = "deny"; - break; - } - - value = appconfig_get(c, section, name, value); - - RRDPUSH_MULTIPLE_CONNECTIONS_STRATEGY ret = def; - - if(strcasecmp(value, "allow") == 0 || strcasecmp(value, "permit") == 0 || strcasecmp(value, "accept") == 0) - ret = RRDPUSH_MULTIPLE_CONNECTIONS_ALLOW; - - else if(strcasecmp(value, "deny") == 0 || strcasecmp(value, "reject") == 0 || strcasecmp(value, "block") == 0) - ret = RRDPUSH_MULTIPLE_CONNECTIONS_DENY_NEW; - - else - error("Invalid stream config value at section [%s], setting '%s', value '%s'", section, name, value); - - return ret; -} - -static int rrdpush_receive(int fd - , const char *key - , const char *hostname - , const char *registry_hostname - , const char *machine_guid - , const char *os - , const char *timezone - , const char *tags - , const char *program_name - , const char *program_version - , 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; - RRDPUSH_MULTIPLE_CONNECTIONS_STRATEGY rrdpush_multiple_connections_strategy = RRDPUSH_MULTIPLE_CONNECTIONS_ALLOW; - - 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); - - rrdpush_multiple_connections_strategy = get_multiple_connections_strategy(&stream_config, key, "multiple connections", rrdpush_multiple_connections_strategy); - rrdpush_multiple_connections_strategy = get_multiple_connections_strategy(&stream_config, machine_guid, "multiple connections", rrdpush_multiple_connections_strategy); - - tags = appconfig_set_default(&stream_config, machine_guid, "host tags", (tags)?tags:""); - if(tags && !*tags) tags = NULL; - - if(!strcmp(machine_guid, "localhost")) - host = localhost; - else - host = rrdhost_find_or_create( - hostname - , registry_hostname - , machine_guid - , os - , timezone - , tags - , program_name - , program_version - , 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); - log_stream_connection(client_ip, client_port, key, machine_guid, hostname, "FAILED - CANNOT ACQUIRE HOST"); - 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, tags '%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") - , host->tags?host->tags:"" - ); -#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)) { - log_stream_connection(client_ip, client_port, key, host->machine_guid, host->hostname, "FAILED - CANNOT REPLY"); - 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(sock_delnonblock(fd) < 0) - 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) { - log_stream_connection(client_ip, client_port, key, host->machine_guid, host->hostname, "FAILED - SOCKET ERROR"); - 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); - if(host->connected_senders > 0) { - switch(rrdpush_multiple_connections_strategy) { - case RRDPUSH_MULTIPLE_CONNECTIONS_ALLOW: - info("STREAM %s [receive from [%s]:%s]: multiple streaming connections for the same host detected. If multiple netdata are pushing metrics for the same charts, at the same time, the result is unexpected.", host->hostname, client_ip, client_port); - break; - - case RRDPUSH_MULTIPLE_CONNECTIONS_DENY_NEW: - rrdhost_unlock(host); - log_stream_connection(client_ip, client_port, key, host->machine_guid, host->hostname, "REJECTED - ALREADY CONNECTED"); - info("STREAM %s [receive from [%s]:%s]: multiple streaming connections for the same host detected. Rejecting new connection.", host->hostname, client_ip, client_port); - fclose(fp); - return 0; - } - } - - rrdhost_flag_clear(host, RRDHOST_FLAG_ORPHAN); - host->connected_senders++; - host->senders_disconnected_time = 0; - if(health_enabled != CONFIG_BOOLEAN_NO) { - if(alarms_delay > 0) { - host->health_delay_up_to = now_realtime_sec() + alarms_delay; - info("Postponing health checks for %ld seconds, on host '%s', because it was just connected." - , alarms_delay - , host->hostname - ); - } - } - 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); - log_stream_connection(client_ip, client_port, key, host->machine_guid, host->hostname, "CONNECTED"); - - size_t count = pluginsd_process(host, &cd, fp, 1); - - log_stream_connection(client_ip, client_port, key, host->machine_guid, host->hostname, "DISCONNECTED"); - error("STREAM %s [receive from [%s]:%s]: disconnected (completed %zu updates).", host->hostname, client_ip, client_port, count); - - rrdhost_wrlock(host); - host->senders_disconnected_time = now_realtime_sec(); - host->connected_senders--; - if(!host->connected_senders) { - rrdhost_flag_set(host, RRDHOST_FLAG_ORPHAN); - if(health_enabled == CONFIG_BOOLEAN_AUTO) - host->health_enabled = 0; - } - rrdhost_unlock(host); - - if(host->connected_senders == 0) - rrdpush_sender_thread_stop(host); - - // cleanup - fclose(fp); - - return (int)count; -} - -struct rrdpush_thread { - int fd; - char *key; - char *hostname; - char *registry_hostname; - char *machine_guid; - char *os; - char *timezone; - char *tags; - char *client_ip; - char *client_port; - char *program_name; - char *program_version; - int update_every; -}; - -static void rrdpush_receiver_thread_cleanup(void *ptr) { - static __thread int executed = 0; - if(!executed) { - executed = 1; - struct rrdpush_thread *rpt = (struct rrdpush_thread *) ptr; - - 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->registry_hostname); - freez(rpt->machine_guid); - freez(rpt->os); - freez(rpt->timezone); - freez(rpt->tags); - freez(rpt->client_ip); - freez(rpt->client_port); - freez(rpt->program_name); - freez(rpt->program_version); - freez(rpt); - } -} - -static void *rrdpush_receiver_thread(void *ptr) { - netdata_thread_cleanup_push(rrdpush_receiver_thread_cleanup, ptr); - - struct rrdpush_thread *rpt = (struct rrdpush_thread *)ptr; - 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->registry_hostname - , rpt->machine_guid - , rpt->os - , rpt->timezone - , rpt->tags - , rpt->program_name - , rpt->program_version - , rpt->update_every - , rpt->client_ip - , rpt->client_port - ); - - netdata_thread_cleanup_pop(1); - return NULL; -} - -static void rrdpush_sender_thread_spawn(RRDHOST *host) { - rrdhost_wrlock(host); - - if(!host->rrdpush_sender_spawn) { - char tag[NETDATA_THREAD_TAG_MAX + 1]; - snprintfz(tag, NETDATA_THREAD_TAG_MAX, "STREAM_SENDER[%s]", host->hostname); - - if(netdata_thread_create(&host->rrdpush_sender_thread, tag, NETDATA_THREAD_OPTION_JOINABLE, rrdpush_sender_thread, (void *) host)) - error("STREAM %s [send]: failed to create new thread for client.", host->hostname); - else - host->rrdpush_sender_spawn = 1; - } - - rrdhost_unlock(host); -} - -int rrdpush_receiver_permission_denied(struct web_client *w) { - // we always respond with the same message and error code - // to prevent an attacker from gaining info about the error - buffer_flush(w->response.data); - buffer_sprintf(w->response.data, "You are not permitted to access this. Check the logs for more info."); - return 401; -} - -int rrdpush_receiver_thread_spawn(RRDHOST *host, struct web_client *w, char *url) { - (void)host; - - info("clients wants to STREAM metrics."); - - char *key = NULL, *hostname = NULL, *registry_hostname = NULL, *machine_guid = NULL, *os = "unknown", *timezone = "unknown", *tags = NULL; - 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, "registry_hostname")) - registry_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; - else if(!strcmp(name, "timezone")) - timezone = value; - else if(!strcmp(name, "tags")) - tags = value; - else - info("STREAM [receive from [%s]:%s]: request has parameter '%s' = '%s', which is not used.", w->client_ip, w->client_port, key, value); - } - - if(!key || !*key) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO KEY"); - error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port); - return rrdpush_receiver_permission_denied(w); - } - - if(!hostname || !*hostname) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO HOSTNAME"); - error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port); - return rrdpush_receiver_permission_denied(w); - } - - if(!machine_guid || !*machine_guid) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO MACHINE GUID"); - error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port); - return rrdpush_receiver_permission_denied(w); - } - - if(regenerate_guid(key, buf) == -1) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - INVALID KEY"); - error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID (use the command uuidgen to generate one). Forbidding access.", w->client_ip, w->client_port, key); - return rrdpush_receiver_permission_denied(w); - } - - if(regenerate_guid(machine_guid, buf) == -1) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - INVALID MACHINE GUID"); - error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, machine_guid); - return rrdpush_receiver_permission_denied(w); - } - - if(!appconfig_get_boolean(&stream_config, key, "enabled", 0)) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - KEY NOT ENABLED"); - error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, key); - return rrdpush_receiver_permission_denied(w); - } - - { - SIMPLE_PATTERN *key_allow_from = simple_pattern_create(appconfig_get(&stream_config, key, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT); - if(key_allow_from) { - if(!simple_pattern_matches(key_allow_from, w->client_ip)) { - simple_pattern_free(key_allow_from); - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname) ? hostname : "-", "ACCESS DENIED - KEY NOT ALLOWED FROM THIS IP"); - error("STREAM [receive from [%s]:%s]: API key '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, key); - return rrdpush_receiver_permission_denied(w); - } - simple_pattern_free(key_allow_from); - } - } - - if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) { - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - MACHINE GUID NOT ENABLED"); - error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid); - return rrdpush_receiver_permission_denied(w); - } - - { - SIMPLE_PATTERN *machine_allow_from = simple_pattern_create(appconfig_get(&stream_config, machine_guid, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT); - if(machine_allow_from) { - if(!simple_pattern_matches(machine_allow_from, w->client_ip)) { - simple_pattern_free(machine_allow_from); - log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname) ? hostname : "-", "ACCESS DENIED - MACHINE GUID NOT ALLOWED FROM THIS IP"); - error("STREAM [receive from [%s]:%s]: Machine GUID '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, machine_guid); - return rrdpush_receiver_permission_denied(w); - } - simple_pattern_free(machine_allow_from); - } - } - - struct rrdpush_thread *rpt = callocz(1, sizeof(struct rrdpush_thread)); - rpt->fd = w->ifd; - rpt->key = strdupz(key); - rpt->hostname = strdupz(hostname); - rpt->registry_hostname = strdupz((registry_hostname && *registry_hostname)?registry_hostname:hostname); - rpt->machine_guid = strdupz(machine_guid); - rpt->os = strdupz(os); - rpt->timezone = strdupz(timezone); - rpt->tags = (tags)?strdupz(tags):NULL; - rpt->client_ip = strdupz(w->client_ip); - rpt->client_port = strdupz(w->client_port); - rpt->update_every = update_every; - - if(w->user_agent && w->user_agent[0]) { - char *t = strchr(w->user_agent, '/'); - if(t && *t) { - *t = '\0'; - t++; - } - - rpt->program_name = strdupz(w->user_agent); - if(t && *t) rpt->program_version = strdupz(t); - } - - netdata_thread_t thread; - - debug(D_SYSTEM, "starting STREAM receive thread."); - - char tag[FILENAME_MAX + 1]; - snprintfz(tag, FILENAME_MAX, "STREAM_RECEIVER[%s,[%s]:%s]", rpt->hostname, w->client_ip, w->client_port); - - if(netdata_thread_create(&thread, tag, NETDATA_THREAD_OPTION_DEFAULT, rrdpush_receiver_thread, (void *)rpt)) - error("Failed to create new STREAM receive thread for client."); - - // prevent the caller from closing the streaming socket - if(web_server_mode == WEB_SERVER_MODE_STATIC_THREADED) { - web_client_flag_set(w, WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET); - } - else { - if(w->ifd == w->ofd) - w->ifd = w->ofd = -1; - else - w->ifd = -1; - } - - buffer_flush(w->response.data); - return 200; -} |