// SPDX-License-Identifier: GPL-3.0-or-later #include "rrdpush.h" #include "common.h" #include "aclk/https_client.h" #define WORKER_SENDER_JOB_CONNECT 0 #define WORKER_SENDER_JOB_PIPE_READ 1 #define WORKER_SENDER_JOB_SOCKET_RECEIVE 2 #define WORKER_SENDER_JOB_EXECUTE 3 #define WORKER_SENDER_JOB_SOCKET_SEND 4 #define WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE 5 #define WORKER_SENDER_JOB_DISCONNECT_OVERFLOW 6 #define WORKER_SENDER_JOB_DISCONNECT_TIMEOUT 7 #define WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR 8 #define WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR 9 #define WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR 10 #define WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED 11 #define WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR 12 #define WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR 13 #define WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION 14 #define WORKER_SENDER_JOB_BUFFER_RATIO 15 #define WORKER_SENDER_JOB_BYTES_RECEIVED 16 #define WORKER_SENDER_JOB_BYTES_SENT 17 #define WORKER_SENDER_JOB_BYTES_COMPRESSED 18 #define WORKER_SENDER_JOB_BYTES_UNCOMPRESSED 19 #define WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO 20 #define WORKER_SENDER_JOB_REPLAY_REQUEST 21 #define WORKER_SENDER_JOB_FUNCTION_REQUEST 22 #define WORKER_SENDER_JOB_REPLAY_DICT_SIZE 23 #define WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION 24 #if WORKER_UTILIZATION_MAX_JOB_TYPES < 25 #error WORKER_UTILIZATION_MAX_JOB_TYPES has to be at least 25 #endif extern struct config stream_config; extern char *netdata_ssl_ca_path; extern char *netdata_ssl_ca_file; static __thread BUFFER *sender_thread_buffer = NULL; static __thread bool sender_thread_buffer_used = false; static __thread time_t sender_thread_buffer_last_reset_s = 0; void sender_thread_buffer_free(void) { buffer_free(sender_thread_buffer); sender_thread_buffer = NULL; sender_thread_buffer_used = false; } // Collector thread starting a transmission BUFFER *sender_start(struct sender_state *s) { if(unlikely(sender_thread_buffer_used)) fatal("STREAMING: thread buffer is used multiple times concurrently."); if(unlikely(rrdpush_sender_last_buffer_recreate_get(s) > sender_thread_buffer_last_reset_s)) { if(unlikely(sender_thread_buffer && sender_thread_buffer->size > THREAD_BUFFER_INITIAL_SIZE)) { buffer_free(sender_thread_buffer); sender_thread_buffer = NULL; } } if(unlikely(!sender_thread_buffer)) { sender_thread_buffer = buffer_create(THREAD_BUFFER_INITIAL_SIZE, &netdata_buffers_statistics.buffers_streaming); sender_thread_buffer_last_reset_s = rrdpush_sender_last_buffer_recreate_get(s); } sender_thread_buffer_used = true; buffer_flush(sender_thread_buffer); return sender_thread_buffer; } static inline void rrdpush_sender_thread_close_socket(RRDHOST *host); #define SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE 3 // Collector thread finishing a transmission void sender_commit(struct sender_state *s, BUFFER *wb, STREAM_TRAFFIC_TYPE type) { if(unlikely(wb != sender_thread_buffer)) fatal("STREAMING: sender is trying to commit a buffer that is not this thread's buffer."); if(unlikely(!sender_thread_buffer_used)) fatal("STREAMING: sender is committing a buffer twice."); sender_thread_buffer_used = false; char *src = (char *)buffer_tostring(wb); size_t src_len = buffer_strlen(wb); if(unlikely(!src || !src_len)) return; sender_lock(s); #ifdef NETDATA_LOG_STREAM_SENDER if(type == STREAM_TRAFFIC_TYPE_METADATA) { if(!s->stream_log_fp) { char filename[FILENAME_MAX + 1]; snprintfz(filename, FILENAME_MAX, "/tmp/stream-sender-%s.txt", s->host ? rrdhost_hostname(s->host) : "unknown"); s->stream_log_fp = fopen(filename, "w"); } fprintf(s->stream_log_fp, "\n--- SEND MESSAGE START: %s ----\n" "%s" "--- SEND MESSAGE END ----------------------------------------\n" , rrdhost_hostname(s->host), src ); } #endif if(unlikely(s->buffer->max_size < (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE)) { netdata_log_info("STREAM %s [send to %s]: max buffer size of %zu is too small for a data message of size %zu. Increasing the max buffer size to %d times the max data message size.", rrdhost_hostname(s->host), s->connected_to, s->buffer->max_size, buffer_strlen(wb) + 1, SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE); s->buffer->max_size = (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE; } if (s->compressor.initialized) { while(src_len) { size_t size_to_compress = src_len; if(unlikely(size_to_compress > COMPRESSION_MAX_MSG_SIZE)) { if (stream_has_capability(s, STREAM_CAP_BINARY)) size_to_compress = COMPRESSION_MAX_MSG_SIZE; else { if (size_to_compress > COMPRESSION_MAX_MSG_SIZE) { // we need to find the last newline // so that the decompressor will have a whole line to work with const char *t = &src[COMPRESSION_MAX_MSG_SIZE]; while (--t >= src) if (unlikely(*t == '\n')) break; if (t <= src) { size_to_compress = COMPRESSION_MAX_MSG_SIZE; } else size_to_compress = t - src + 1; } } } const char *dst; size_t dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst); if (!dst_len) { netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed. Resetting compressor and re-trying", rrdhost_hostname(s->host), s->connected_to); rrdpush_compression_initialize(s); dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst); if(!dst_len) { netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed again. Deactivating compression", rrdhost_hostname(s->host), s->connected_to); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION); rrdpush_compression_deactivate(s); rrdpush_sender_thread_close_socket(s->host); sender_unlock(s); return; } } rrdpush_signature_t signature = rrdpush_compress_encode_signature(dst_len); #ifdef NETDATA_INTERNAL_CHECKS // check if reversing the signature provides the same length size_t decoded_dst_len = rrdpush_decompress_decode_signature((const char *)&signature, sizeof(signature)); if(decoded_dst_len != dst_len) fatal("RRDPUSH COMPRESSION: invalid signature, original payload %zu bytes, " "compressed payload length %zu bytes, but signature says payload is %zu bytes", size_to_compress, dst_len, decoded_dst_len); #endif if(cbuffer_add_unsafe(s->buffer, (const char *)&signature, sizeof(signature))) s->flags |= SENDER_FLAG_OVERFLOW; else { if(cbuffer_add_unsafe(s->buffer, dst, dst_len)) s->flags |= SENDER_FLAG_OVERFLOW; else s->sent_bytes_on_this_connection_per_type[type] += dst_len + sizeof(signature); } src = src + size_to_compress; src_len -= size_to_compress; } } else if(cbuffer_add_unsafe(s->buffer, src, src_len)) s->flags |= SENDER_FLAG_OVERFLOW; else s->sent_bytes_on_this_connection_per_type[type] += src_len; replication_recalculate_buffer_used_ratio_unsafe(s); bool signal_sender = false; if(!rrdpush_sender_pipe_has_pending_data(s)) { rrdpush_sender_pipe_set_pending_data(s); signal_sender = true; } sender_unlock(s); if(signal_sender && (!stream_has_capability(s, STREAM_CAP_INTERPOLATED) || type != STREAM_TRAFFIC_TYPE_DATA)) rrdpush_signal_sender_to_wake_up(s); } static inline void rrdpush_sender_add_host_variable_to_buffer(BUFFER *wb, const RRDVAR_ACQUIRED *rva) { buffer_sprintf( wb , "VARIABLE HOST %s = " NETDATA_DOUBLE_FORMAT "\n" , rrdvar_name(rva) , rrdvar2number(rva) ); netdata_log_debug(D_STREAM, "RRDVAR pushed HOST VARIABLE %s = " NETDATA_DOUBLE_FORMAT, rrdvar_name(rva), rrdvar2number(rva)); } void rrdpush_sender_send_this_host_variable_now(RRDHOST *host, const RRDVAR_ACQUIRED *rva) { if(rrdhost_can_send_definitions_to_parent(host)) { BUFFER *wb = sender_start(host->sender); rrdpush_sender_add_host_variable_to_buffer(wb, rva); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); } } struct custom_host_variables_callback { BUFFER *wb; }; static int rrdpush_sender_thread_custom_host_variables_callback(const DICTIONARY_ITEM *item __maybe_unused, void *rrdvar_ptr __maybe_unused, void *struct_ptr) { const RRDVAR_ACQUIRED *rv = (const RRDVAR_ACQUIRED *)item; struct custom_host_variables_callback *tmp = struct_ptr; BUFFER *wb = tmp->wb; if(unlikely(rrdvar_flags(rv) & RRDVAR_FLAG_CUSTOM_HOST_VAR && rrdvar_type(rv) == RRDVAR_TYPE_CALCULATED)) { rrdpush_sender_add_host_variable_to_buffer(wb, rv); return 1; } return 0; } static void rrdpush_sender_thread_send_custom_host_variables(RRDHOST *host) { if(rrdhost_can_send_definitions_to_parent(host)) { BUFFER *wb = sender_start(host->sender); struct custom_host_variables_callback tmp = { .wb = wb }; int ret = rrdvar_walkthrough_read(host->rrdvars, rrdpush_sender_thread_custom_host_variables_callback, &tmp); (void)ret; sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); netdata_log_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) { RRDSET *st; rrdset_foreach_read(st, host) { rrdset_flag_clear(st, RRDSET_FLAG_SENDER_REPLICATION_IN_PROGRESS); rrdset_flag_set(st, RRDSET_FLAG_SENDER_REPLICATION_FINISHED); st->rrdpush.sender.resync_time_s = 0; RRDDIM *rd; rrddim_foreach_read(rd, st) rrddim_metadata_exposed_upstream_clear(rd); rrddim_foreach_done(rd); rrdset_metadata_updated(st); } rrdset_foreach_done(st); rrdhost_sender_replicating_charts_zero(host); } static void rrdpush_sender_cbuffer_recreate_timed(struct sender_state *s, time_t now_s, bool have_mutex, bool force) { static __thread time_t last_reset_time_s = 0; if(!force && now_s - last_reset_time_s < 300) return; if(!have_mutex) sender_lock(s); rrdpush_sender_last_buffer_recreate_set(s, now_s); last_reset_time_s = now_s; if(s->buffer && s->buffer->size > CBUFFER_INITIAL_SIZE) { size_t max = s->buffer->max_size; cbuffer_free(s->buffer); s->buffer = cbuffer_new(CBUFFER_INITIAL_SIZE, max, &netdata_buffers_statistics.cbuffers_streaming); } sender_thread_buffer_free(); if(!have_mutex) sender_unlock(s); } static void rrdpush_sender_cbuffer_flush(RRDHOST *host) { rrdpush_sender_set_flush_time(host->sender); sender_lock(host->sender); // flush the output buffer from any data it may have cbuffer_flush(host->sender->buffer); rrdpush_sender_cbuffer_recreate_timed(host->sender, now_monotonic_sec(), true, true); replication_recalculate_buffer_used_ratio_unsafe(host->sender); sender_unlock(host->sender); } static void rrdpush_sender_charts_and_replication_reset(RRDHOST *host) { rrdpush_sender_set_flush_time(host->sender); // stop all replication commands inflight replication_sender_delete_pending_requests(host->sender); // reset the state of all charts rrdpush_sender_thread_reset_all_charts(host); rrdpush_sender_replicating_charts_zero(host->sender); } static void rrdpush_sender_on_connect(RRDHOST *host) { rrdpush_sender_cbuffer_flush(host); rrdpush_sender_charts_and_replication_reset(host); } static void rrdpush_sender_after_connect(RRDHOST *host) { rrdpush_sender_thread_send_custom_host_variables(host); } static inline void rrdpush_sender_thread_close_socket(RRDHOST *host) { #ifdef ENABLE_HTTPS netdata_ssl_close(&host->sender->ssl); #endif if(host->sender->rrdpush_sender_socket != -1) { close(host->sender->rrdpush_sender_socket); host->sender->rrdpush_sender_socket = -1; } rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED); // do not flush the circular buffer here // this function is called sometimes with the mutex lock, sometimes without the lock rrdpush_sender_charts_and_replication_reset(host); } void rrdpush_encode_variable(stream_encoded_t *se, RRDHOST *host) { se->os_name = (host->system_info->host_os_name)?url_encode(host->system_info->host_os_name):strdupz(""); se->os_id = (host->system_info->host_os_id)?url_encode(host->system_info->host_os_id):strdupz(""); se->os_version = (host->system_info->host_os_version)?url_encode(host->system_info->host_os_version):strdupz(""); se->kernel_name = (host->system_info->kernel_name)?url_encode(host->system_info->kernel_name):strdupz(""); se->kernel_version = (host->system_info->kernel_version)?url_encode(host->system_info->kernel_version):strdupz(""); } void rrdpush_clean_encoded(stream_encoded_t *se) { if (se->os_name) { freez(se->os_name); se->os_name = NULL; } if (se->os_id) { freez(se->os_id); se->os_id = NULL; } if (se->os_version) { freez(se->os_version); se->os_version = NULL; } if (se->kernel_name) { freez(se->kernel_name); se->kernel_name = NULL; } if (se->kernel_version) { freez(se->kernel_version); se->kernel_version = NULL; } } struct { const char *response; const char *status; size_t length; int32_t version; bool dynamic; const char *error; int worker_job_id; int postpone_reconnect_seconds; ND_LOG_FIELD_PRIORITY priority; } stream_responses[] = { { .response = START_STREAMING_PROMPT_VN, .length = sizeof(START_STREAMING_PROMPT_VN) - 1, .status = RRDPUSH_STATUS_CONNECTED, .version = STREAM_HANDSHAKE_OK_V3, // and above .dynamic = true, // dynamic = we will parse the version / capabilities .error = NULL, .worker_job_id = 0, .postpone_reconnect_seconds = 0, .priority = NDLP_INFO, }, { .response = START_STREAMING_PROMPT_V2, .length = sizeof(START_STREAMING_PROMPT_V2) - 1, .status = RRDPUSH_STATUS_CONNECTED, .version = STREAM_HANDSHAKE_OK_V2, .dynamic = false, .error = NULL, .worker_job_id = 0, .postpone_reconnect_seconds = 0, .priority = NDLP_INFO, }, { .response = START_STREAMING_PROMPT_V1, .length = sizeof(START_STREAMING_PROMPT_V1) - 1, .status = RRDPUSH_STATUS_CONNECTED, .version = STREAM_HANDSHAKE_OK_V1, .dynamic = false, .error = NULL, .worker_job_id = 0, .postpone_reconnect_seconds = 0, .priority = NDLP_INFO, }, { .response = START_STREAMING_ERROR_SAME_LOCALHOST, .length = sizeof(START_STREAMING_ERROR_SAME_LOCALHOST) - 1, .status = RRDPUSH_STATUS_LOCALHOST, .version = STREAM_HANDSHAKE_ERROR_LOCALHOST, .dynamic = false, .error = "remote server rejected this stream, the host we are trying to stream is its localhost", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 60 * 60, // the IP may change, try it every hour .priority = NDLP_DEBUG, }, { .response = START_STREAMING_ERROR_ALREADY_STREAMING, .length = sizeof(START_STREAMING_ERROR_ALREADY_STREAMING) - 1, .status = RRDPUSH_STATUS_ALREADY_CONNECTED, .version = STREAM_HANDSHAKE_ERROR_ALREADY_CONNECTED, .dynamic = false, .error = "remote server rejected this stream, the host we are trying to stream is already streamed to it", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 2 * 60, // 2 minutes .priority = NDLP_DEBUG, }, { .response = START_STREAMING_ERROR_NOT_PERMITTED, .length = sizeof(START_STREAMING_ERROR_NOT_PERMITTED) - 1, .status = RRDPUSH_STATUS_PERMISSION_DENIED, .version = STREAM_HANDSHAKE_ERROR_DENIED, .dynamic = false, .error = "remote server denied access, probably we don't have the right API key?", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 1 * 60, // 1 minute .priority = NDLP_ERR, }, { .response = START_STREAMING_ERROR_BUSY_TRY_LATER, .length = sizeof(START_STREAMING_ERROR_BUSY_TRY_LATER) - 1, .status = RRDPUSH_STATUS_RATE_LIMIT, .version = STREAM_HANDSHAKE_BUSY_TRY_LATER, .dynamic = false, .error = "remote server is currently busy, we should try later", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 2 * 60, // 2 minutes .priority = NDLP_NOTICE, }, { .response = START_STREAMING_ERROR_INTERNAL_ERROR, .length = sizeof(START_STREAMING_ERROR_INTERNAL_ERROR) - 1, .status = RRDPUSH_STATUS_INTERNAL_SERVER_ERROR, .version = STREAM_HANDSHAKE_INTERNAL_ERROR, .dynamic = false, .error = "remote server is encountered an internal error, we should try later", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 5 * 60, // 5 minutes .priority = NDLP_CRIT, }, { .response = START_STREAMING_ERROR_INITIALIZATION, .length = sizeof(START_STREAMING_ERROR_INITIALIZATION) - 1, .status = RRDPUSH_STATUS_INITIALIZATION_IN_PROGRESS, .version = STREAM_HANDSHAKE_INITIALIZATION, .dynamic = false, .error = "remote server is initializing, we should try later", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 2 * 60, // 2 minute .priority = NDLP_NOTICE, }, // terminator { .response = NULL, .length = 0, .status = RRDPUSH_STATUS_BAD_HANDSHAKE, .version = STREAM_HANDSHAKE_ERROR_BAD_HANDSHAKE, .dynamic = false, .error = "remote node response is not understood, is it Netdata?", .worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, .postpone_reconnect_seconds = 1 * 60, // 1 minute .priority = NDLP_ERR, } }; static inline bool rrdpush_sender_validate_response(RRDHOST *host, struct sender_state *s, char *http, size_t http_length) { int32_t version = STREAM_HANDSHAKE_ERROR_BAD_HANDSHAKE; int i; for(i = 0; stream_responses[i].response ; i++) { if(stream_responses[i].dynamic && http_length > stream_responses[i].length && http_length < (stream_responses[i].length + 30) && strncmp(http, stream_responses[i].response, stream_responses[i].length) == 0) { version = str2i(&http[stream_responses[i].length]); break; } else if(http_length == stream_responses[i].length && strcmp(http, stream_responses[i].response) == 0) { version = stream_responses[i].version; break; } } if(version >= STREAM_HANDSHAKE_OK_V1) { host->destination->reason = version; host->destination->postpone_reconnection_until = now_realtime_sec() + s->reconnect_delay; s->capabilities = convert_stream_version_to_capabilities(version, host, true); return true; } ND_LOG_FIELD_PRIORITY priority = stream_responses[i].priority; const char *error = stream_responses[i].error; const char *status = stream_responses[i].status; int worker_job_id = stream_responses[i].worker_job_id; int delay = stream_responses[i].postpone_reconnect_seconds; worker_is_busy(worker_job_id); rrdpush_sender_thread_close_socket(host); host->destination->reason = version; host->destination->postpone_reconnection_until = now_realtime_sec() + delay; ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, status), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); char buf[RFC3339_MAX_LENGTH]; rfc3339_datetime_ut(buf, sizeof(buf), host->destination->postpone_reconnection_until * USEC_PER_SEC, 0, false); nd_log(NDLS_DAEMON, priority, "STREAM %s [send to %s]: %s - will retry in %d secs, at %s", rrdhost_hostname(host), s->connected_to, error, delay, buf); return false; } unsigned char alpn_proto_list[] = { 18, 'n', 'e', 't', 'd', 'a', 't', 'a', '_', 's', 't', 'r', 'e', 'a', 'm', '/', '2', '.', '0', 8, 'h', 't', 't', 'p', '/', '1', '.', '1' }; #define CONN_UPGRADE_VAL "upgrade" static bool rrdpush_sender_connect_ssl(struct sender_state *s __maybe_unused) { #ifdef ENABLE_HTTPS RRDHOST *host = s->host; bool ssl_required = host->destination && host->destination->ssl; netdata_ssl_close(&host->sender->ssl); if(!ssl_required) return true; if (netdata_ssl_open_ext(&host->sender->ssl, netdata_ssl_streaming_sender_ctx, s->rrdpush_sender_socket, alpn_proto_list, sizeof(alpn_proto_list))) { if(!netdata_ssl_connect(&host->sender->ssl)) { // couldn't connect ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_SSL_ERROR), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR); rrdpush_sender_thread_close_socket(host); host->destination->reason = STREAM_HANDSHAKE_ERROR_SSL_ERROR; host->destination->postpone_reconnection_until = now_realtime_sec() + 5 * 60; return false; } if (netdata_ssl_validate_certificate_sender && security_test_certificate(host->sender->ssl.conn)) { // certificate is not valid ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_INVALID_SSL_CERTIFICATE), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR); netdata_log_error("SSL: closing the stream connection, because the server SSL certificate is not valid."); rrdpush_sender_thread_close_socket(host); host->destination->reason = STREAM_HANDSHAKE_ERROR_INVALID_CERTIFICATE; host->destination->postpone_reconnection_until = now_realtime_sec() + 5 * 60; return false; } return true; } ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CANT_ESTABLISH_SSL_CONNECTION), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); netdata_log_error("SSL: failed to establish connection."); return false; #else // SSL is not enabled return true; #endif } static int rrdpush_http_upgrade_prelude(RRDHOST *host, struct sender_state *s) { char http[HTTP_HEADER_SIZE + 1]; snprintfz(http, HTTP_HEADER_SIZE, "GET " NETDATA_STREAM_URL HTTP_1_1 HTTP_ENDL "Upgrade: " NETDATA_STREAM_PROTO_NAME HTTP_ENDL "Connection: Upgrade" HTTP_HDR_END); ssize_t bytes = send_timeout( #ifdef ENABLE_HTTPS &host->sender->ssl, #endif s->rrdpush_sender_socket, http, strlen(http), 0, 1000); bytes = recv_timeout( #ifdef ENABLE_HTTPS &host->sender->ssl, #endif s->rrdpush_sender_socket, http, HTTP_HEADER_SIZE, 0, 1000); if (bytes <= 0) { error_report("Error reading from remote"); return 1; } rbuf_t buf = rbuf_create(bytes); rbuf_push(buf, http, bytes); http_parse_ctx ctx; http_parse_ctx_create(&ctx); ctx.flags |= HTTP_PARSE_FLAG_DONT_WAIT_FOR_CONTENT; int rc; // while((rc = parse_http_response(buf, &ctx)) == HTTP_PARSE_NEED_MORE_DATA); rc = parse_http_response(buf, &ctx); if (rc != HTTP_PARSE_SUCCESS) { error_report("Failed to parse HTTP response sent. (%d)", rc); goto err_cleanup; } if (ctx.http_code == HTTP_RESP_MOVED_PERM) { const char *hdr = get_http_header_by_name(&ctx, "location"); if (hdr) error_report("HTTP response is %d Moved Permanently (location: \"%s\") instead of expected %d Switching Protocols.", ctx.http_code, hdr, HTTP_RESP_SWITCH_PROTO); else error_report("HTTP response is %d instead of expected %d Switching Protocols.", ctx.http_code, HTTP_RESP_SWITCH_PROTO); goto err_cleanup; } if (ctx.http_code == HTTP_RESP_NOT_FOUND) { error_report("HTTP response is %d instead of expected %d Switching Protocols. Parent version too old.", ctx.http_code, HTTP_RESP_SWITCH_PROTO); // TODO set some flag here that will signify parent is older version // and to try connection without rrdpush_http_upgrade_prelude next time goto err_cleanup; } if (ctx.http_code != HTTP_RESP_SWITCH_PROTO) { error_report("HTTP response is %d instead of expected %d Switching Protocols", ctx.http_code, HTTP_RESP_SWITCH_PROTO); goto err_cleanup; } const char *hdr = get_http_header_by_name(&ctx, "connection"); if (!hdr) { error_report("Missing \"connection\" header in reply"); goto err_cleanup; } if (strncmp(hdr, CONN_UPGRADE_VAL, strlen(CONN_UPGRADE_VAL))) { error_report("Expected \"connection: " CONN_UPGRADE_VAL "\""); goto err_cleanup; } hdr = get_http_header_by_name(&ctx, "upgrade"); if (!hdr) { error_report("Missing \"upgrade\" header in reply"); goto err_cleanup; } if (strncmp(hdr, NETDATA_STREAM_PROTO_NAME, strlen(NETDATA_STREAM_PROTO_NAME))) { error_report("Expected \"upgrade: " NETDATA_STREAM_PROTO_NAME "\""); goto err_cleanup; } netdata_log_debug(D_STREAM, "Stream sender upgrade to \"" NETDATA_STREAM_PROTO_NAME "\" successful"); rbuf_free(buf); http_parse_ctx_destroy(&ctx); return 0; err_cleanup: rbuf_free(buf); http_parse_ctx_destroy(&ctx); return 1; } static bool rrdpush_sender_thread_connect_to_parent(RRDHOST *host, int default_port, int timeout, struct sender_state *s) { struct timeval tv = { .tv_sec = timeout, .tv_usec = 0 }; // make sure the socket is closed rrdpush_sender_thread_close_socket(host); s->rrdpush_sender_socket = connect_to_one_of_destinations( host , default_port , &tv , &s->reconnects_counter , s->connected_to , sizeof(s->connected_to)-1 , &host->destination ); if(unlikely(s->rrdpush_sender_socket == -1)) { // netdata_log_error("STREAM %s [send to %s]: could not connect to parent node at this time.", rrdhost_hostname(host), host->rrdpush_send_destination); return false; } // netdata_log_info("STREAM %s [send to %s]: initializing communication...", rrdhost_hostname(host), s->connected_to); // reset our capabilities to default s->capabilities = stream_our_capabilities(host, true); /* TODO: During the implementation of #7265 switch the set of variables to HOST_* and CONTAINER_* if the version negotiation resulted in a high enough version. */ stream_encoded_t se; rrdpush_encode_variable(&se, host); host->sender->hops = host->system_info->hops + 1; char http[HTTP_HEADER_SIZE + 1]; int eol = snprintfz(http, HTTP_HEADER_SIZE, "STREAM " "key=%s" "&hostname=%s" "®istry_hostname=%s" "&machine_guid=%s" "&update_every=%d" "&os=%s" "&timezone=%s" "&abbrev_timezone=%s" "&utc_offset=%d" "&hops=%d" "&ml_capable=%d" "&ml_enabled=%d" "&mc_version=%d" "&tags=%s" "&ver=%u" "&NETDATA_INSTANCE_CLOUD_TYPE=%s" "&NETDATA_INSTANCE_CLOUD_INSTANCE_TYPE=%s" "&NETDATA_INSTANCE_CLOUD_INSTANCE_REGION=%s" "&NETDATA_SYSTEM_OS_NAME=%s" "&NETDATA_SYSTEM_OS_ID=%s" "&NETDATA_SYSTEM_OS_ID_LIKE=%s" "&NETDATA_SYSTEM_OS_VERSION=%s" "&NETDATA_SYSTEM_OS_VERSION_ID=%s" "&NETDATA_SYSTEM_OS_DETECTION=%s" "&NETDATA_HOST_IS_K8S_NODE=%s" "&NETDATA_SYSTEM_KERNEL_NAME=%s" "&NETDATA_SYSTEM_KERNEL_VERSION=%s" "&NETDATA_SYSTEM_ARCHITECTURE=%s" "&NETDATA_SYSTEM_VIRTUALIZATION=%s" "&NETDATA_SYSTEM_VIRT_DETECTION=%s" "&NETDATA_SYSTEM_CONTAINER=%s" "&NETDATA_SYSTEM_CONTAINER_DETECTION=%s" "&NETDATA_CONTAINER_OS_NAME=%s" "&NETDATA_CONTAINER_OS_ID=%s" "&NETDATA_CONTAINER_OS_ID_LIKE=%s" "&NETDATA_CONTAINER_OS_VERSION=%s" "&NETDATA_CONTAINER_OS_VERSION_ID=%s" "&NETDATA_CONTAINER_OS_DETECTION=%s" "&NETDATA_SYSTEM_CPU_LOGICAL_CPU_COUNT=%s" "&NETDATA_SYSTEM_CPU_FREQ=%s" "&NETDATA_SYSTEM_TOTAL_RAM=%s" "&NETDATA_SYSTEM_TOTAL_DISK_SIZE=%s" "&NETDATA_PROTOCOL_VERSION=%s" HTTP_1_1 HTTP_ENDL "User-Agent: %s/%s\r\n" "Accept: */*\r\n\r\n" , host->rrdpush_send_api_key , rrdhost_hostname(host) , rrdhost_registry_hostname(host) , host->machine_guid , default_rrd_update_every , rrdhost_os(host) , rrdhost_timezone(host) , rrdhost_abbrev_timezone(host) , host->utc_offset , host->sender->hops , host->system_info->ml_capable , host->system_info->ml_enabled , host->system_info->mc_version , rrdhost_tags(host) , s->capabilities , (host->system_info->cloud_provider_type) ? host->system_info->cloud_provider_type : "" , (host->system_info->cloud_instance_type) ? host->system_info->cloud_instance_type : "" , (host->system_info->cloud_instance_region) ? host->system_info->cloud_instance_region : "" , se.os_name , se.os_id , (host->system_info->host_os_id_like) ? host->system_info->host_os_id_like : "" , se.os_version , (host->system_info->host_os_version_id) ? host->system_info->host_os_version_id : "" , (host->system_info->host_os_detection) ? host->system_info->host_os_detection : "" , (host->system_info->is_k8s_node) ? host->system_info->is_k8s_node : "" , se.kernel_name , se.kernel_version , (host->system_info->architecture) ? host->system_info->architecture : "" , (host->system_info->virtualization) ? host->system_info->virtualization : "" , (host->system_info->virt_detection) ? host->system_info->virt_detection : "" , (host->system_info->container) ? host->system_info->container : "" , (host->system_info->container_detection) ? host->system_info->container_detection : "" , (host->system_info->container_os_name) ? host->system_info->container_os_name : "" , (host->system_info->container_os_id) ? host->system_info->container_os_id : "" , (host->system_info->container_os_id_like) ? host->system_info->container_os_id_like : "" , (host->system_info->container_os_version) ? host->system_info->container_os_version : "" , (host->system_info->container_os_version_id) ? host->system_info->container_os_version_id : "" , (host->system_info->container_os_detection) ? host->system_info->container_os_detection : "" , (host->system_info->host_cores) ? host->system_info->host_cores : "" , (host->system_info->host_cpu_freq) ? host->system_info->host_cpu_freq : "" , (host->system_info->host_ram_total) ? host->system_info->host_ram_total : "" , (host->system_info->host_disk_space) ? host->system_info->host_disk_space : "" , STREAMING_PROTOCOL_VERSION , rrdhost_program_name(host) , rrdhost_program_version(host) ); http[eol] = 0x00; rrdpush_clean_encoded(&se); if(!rrdpush_sender_connect_ssl(s)) return false; if (s->parent_using_h2o && rrdpush_http_upgrade_prelude(host, s)) { ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CANT_UPGRADE_CONNECTION), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION); rrdpush_sender_thread_close_socket(host); host->destination->reason = STREAM_HANDSHAKE_ERROR_HTTP_UPGRADE; host->destination->postpone_reconnection_until = now_realtime_sec() + 1 * 60; return false; } ssize_t bytes, len = (ssize_t)strlen(http); bytes = send_timeout( #ifdef ENABLE_HTTPS &host->sender->ssl, #endif s->rrdpush_sender_socket, http, len, 0, timeout); if(bytes <= 0) { // timeout is 0 ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_TIMEOUT), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT); rrdpush_sender_thread_close_socket(host); nd_log(NDLS_DAEMON, NDLP_ERR, "STREAM %s [send to %s]: failed to send HTTP header to remote netdata.", rrdhost_hostname(host), s->connected_to); host->destination->reason = STREAM_HANDSHAKE_ERROR_SEND_TIMEOUT; host->destination->postpone_reconnection_until = now_realtime_sec() + 1 * 60; return false; } bytes = recv_timeout( #ifdef ENABLE_HTTPS &host->sender->ssl, #endif s->rrdpush_sender_socket, http, HTTP_HEADER_SIZE, 0, timeout); if(bytes <= 0) { // timeout is 0 ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_TIMEOUT), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT); rrdpush_sender_thread_close_socket(host); nd_log(NDLS_DAEMON, NDLP_ERR, "STREAM %s [send to %s]: remote netdata does not respond.", rrdhost_hostname(host), s->connected_to); host->destination->reason = STREAM_HANDSHAKE_ERROR_RECEIVE_TIMEOUT; host->destination->postpone_reconnection_until = now_realtime_sec() + 30; return false; } if(sock_setnonblock(s->rrdpush_sender_socket) < 0) nd_log(NDLS_DAEMON, NDLP_WARNING, "STREAM %s [send to %s]: cannot set non-blocking mode for socket.", rrdhost_hostname(host), s->connected_to); if(sock_enlarge_out(s->rrdpush_sender_socket) < 0) nd_log(NDLS_DAEMON, NDLP_WARNING, "STREAM %s [send to %s]: cannot enlarge the socket buffer.", rrdhost_hostname(host), s->connected_to); http[bytes] = '\0'; if(!rrdpush_sender_validate_response(host, s, http, bytes)) return false; rrdpush_compression_initialize(s); log_sender_capabilities(s); ND_LOG_STACK lgs[] = { ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CONNECTED), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); nd_log(NDLS_DAEMON, NDLP_DEBUG, "STREAM %s: connected to %s...", rrdhost_hostname(host), s->connected_to); return true; } static bool attempt_to_connect(struct sender_state *state) { ND_LOG_STACK lgs[] = { ND_LOG_FIELD_UUID(NDF_MESSAGE_ID, &streaming_to_parent_msgid), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); state->send_attempts = 0; // reset the bytes we have sent for this session state->sent_bytes_on_this_connection = 0; memset(state->sent_bytes_on_this_connection_per_type, 0, sizeof(state->sent_bytes_on_this_connection_per_type)); if(rrdpush_sender_thread_connect_to_parent(state->host, state->default_port, state->timeout, state)) { // reset the buffer, to properly send charts and metrics rrdpush_sender_on_connect(state->host); // send from the beginning state->begin = 0; // make sure the next reconnection will be immediate state->not_connected_loops = 0; // let the data collection threads know we are ready rrdhost_flag_set(state->host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED); rrdpush_sender_after_connect(state->host); return true; } // we couldn't connect // increase the failed connections counter state->not_connected_loops++; // slow re-connection on repeating errors usec_t now_ut = now_monotonic_usec(); usec_t end_ut = now_ut + USEC_PER_SEC * state->reconnect_delay; while(now_ut < end_ut) { netdata_thread_testcancel(); sleep_usec(500 * USEC_PER_MS); // seconds now_ut = now_monotonic_usec(); } return false; } // TCP window is open, and we have data to transmit. static ssize_t attempt_to_send(struct sender_state *s) { ssize_t ret; #ifdef NETDATA_INTERNAL_CHECKS struct circular_buffer *cb = s->buffer; #endif sender_lock(s); char *chunk; size_t outstanding = cbuffer_next_unsafe(s->buffer, &chunk); netdata_log_debug(D_STREAM, "STREAM: Sending data. Buffer r=%zu w=%zu s=%zu, next chunk=%zu", cb->read, cb->write, cb->size, outstanding); #ifdef ENABLE_HTTPS if(SSL_connection(&s->ssl)) ret = netdata_ssl_write(&s->ssl, chunk, outstanding); else ret = send(s->rrdpush_sender_socket, chunk, outstanding, MSG_DONTWAIT); #else ret = send(s->rrdpush_sender_socket, chunk, outstanding, MSG_DONTWAIT); #endif if (likely(ret > 0)) { cbuffer_remove_unsafe(s->buffer, ret); s->sent_bytes_on_this_connection += ret; s->sent_bytes += ret; netdata_log_debug(D_STREAM, "STREAM %s [send to %s]: Sent %zd bytes", rrdhost_hostname(s->host), s->connected_to, ret); } else if (ret == -1 && (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) netdata_log_debug(D_STREAM, "STREAM %s [send to %s]: unavailable after polling POLLOUT", rrdhost_hostname(s->host), s->connected_to); else if (ret == -1) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR); netdata_log_debug(D_STREAM, "STREAM: Send failed - closing socket..."); netdata_log_error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", rrdhost_hostname(s->host), s->connected_to, s->sent_bytes_on_this_connection); rrdpush_sender_thread_close_socket(s->host); } else netdata_log_debug(D_STREAM, "STREAM: send() returned 0 -> no error but no transmission"); replication_recalculate_buffer_used_ratio_unsafe(s); sender_unlock(s); return ret; } static ssize_t attempt_read(struct sender_state *s) { ssize_t ret; #ifdef ENABLE_HTTPS if (SSL_connection(&s->ssl)) ret = netdata_ssl_read(&s->ssl, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1); else ret = recv(s->rrdpush_sender_socket, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1,MSG_DONTWAIT); #else ret = recv(s->rrdpush_sender_socket, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1,MSG_DONTWAIT); #endif if (ret > 0) { s->read_len += ret; return ret; } if (ret < 0 && (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)) return ret; #ifdef ENABLE_HTTPS if (SSL_connection(&s->ssl)) worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR); else #endif if (ret == 0 || errno == ECONNRESET) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED); netdata_log_error("STREAM %s [send to %s]: connection closed by far end.", rrdhost_hostname(s->host), s->connected_to); } else { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR); netdata_log_error("STREAM %s [send to %s]: error during receive (%zd) - closing connection.", rrdhost_hostname(s->host), s->connected_to, ret); } rrdpush_sender_thread_close_socket(s->host); return ret; } struct inflight_stream_function { struct sender_state *sender; STRING *transaction; usec_t received_ut; }; void stream_execute_function_callback(BUFFER *func_wb, int code, void *data) { struct inflight_stream_function *tmp = data; struct sender_state *s = tmp->sender; if(rrdhost_can_send_definitions_to_parent(s->host)) { BUFFER *wb = sender_start(s); pluginsd_function_result_begin_to_buffer(wb , string2str(tmp->transaction) , code , functions_content_type_to_format(func_wb->content_type) , func_wb->expires); buffer_fast_strcat(wb, buffer_tostring(func_wb), buffer_strlen(func_wb)); pluginsd_function_result_end_to_buffer(wb); sender_commit(s, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS); sender_thread_buffer_free(); internal_error(true, "STREAM %s [send to %s] FUNCTION transaction %s sending back response (%zu bytes, %"PRIu64" usec).", rrdhost_hostname(s->host), s->connected_to, string2str(tmp->transaction), buffer_strlen(func_wb), now_realtime_usec() - tmp->received_ut); } string_freez(tmp->transaction); buffer_free(func_wb); freez(tmp); } // This is just a placeholder until the gap filling state machine is inserted void execute_commands(struct sender_state *s) { worker_is_busy(WORKER_SENDER_JOB_EXECUTE); ND_LOG_STACK lgs[] = { ND_LOG_FIELD_CB(NDF_REQUEST, line_splitter_reconstruct_line, &s->line), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); char *start = s->read_buffer, *end = &s->read_buffer[s->read_len], *newline; *end = 0; while( start < end && (newline = strchr(start, '\n')) ) { *newline = '\0'; if (s->receiving_function_payload && unlikely(strcmp(start, PLUGINSD_KEYWORD_FUNCTION_PAYLOAD_END) != 0)) { if (buffer_strlen(s->function_payload.payload) != 0) buffer_strcat(s->function_payload.payload, "\n"); buffer_strcat(s->function_payload.payload, start); start = newline + 1; continue; } s->line.count++; s->line.num_words = quoted_strings_splitter_pluginsd(start, s->line.words, PLUGINSD_MAX_WORDS); const char *command = get_word(s->line.words, s->line.num_words, 0); if(command && (strcmp(command, PLUGINSD_KEYWORD_FUNCTION) == 0 || strcmp(command, PLUGINSD_KEYWORD_FUNCTION_PAYLOAD_END) == 0)) { worker_is_busy(WORKER_SENDER_JOB_FUNCTION_REQUEST); nd_log(NDLS_ACCESS, NDLP_INFO, NULL); char *transaction = s->receiving_function_payload ? s->function_payload.txid : get_word(s->line.words, s->line.num_words, 1); char *timeout_s = s->receiving_function_payload ? s->function_payload.timeout : get_word(s->line.words, s->line.num_words, 2); char *function = s->receiving_function_payload ? s->function_payload.fn_name : get_word(s->line.words, s->line.num_words, 3); if(!transaction || !*transaction || !timeout_s || !*timeout_s || !function || !*function) { netdata_log_error("STREAM %s [send to %s] %s execution command is incomplete (transaction = '%s', timeout = '%s', function = '%s'). Ignoring it.", rrdhost_hostname(s->host), s->connected_to, command, transaction?transaction:"(unset)", timeout_s?timeout_s:"(unset)", function?function:"(unset)"); } else { int timeout = str2i(timeout_s); if(timeout <= 0) timeout = PLUGINS_FUNCTIONS_TIMEOUT_DEFAULT; struct inflight_stream_function *tmp = callocz(1, sizeof(struct inflight_stream_function)); tmp->received_ut = now_realtime_usec(); tmp->sender = s; tmp->transaction = string_strdupz(transaction); BUFFER *wb = buffer_create(PLUGINSD_LINE_MAX + 1, &netdata_buffers_statistics.buffers_functions); char *payload = s->receiving_function_payload ? (char *)buffer_tostring(s->function_payload.payload) : NULL; int code = rrd_function_run(s->host, wb, timeout, function, false, transaction, stream_execute_function_callback, tmp, NULL, NULL, payload); if(code != HTTP_RESP_OK) { if (!buffer_strlen(wb)) rrd_call_function_error(wb, "Failed to route request to collector", code); stream_execute_function_callback(wb, code, tmp); } } if (s->receiving_function_payload) { s->receiving_function_payload = false; buffer_free(s->function_payload.payload); freez(s->function_payload.txid); freez(s->function_payload.timeout); freez(s->function_payload.fn_name); memset(&s->function_payload, 0, sizeof(struct function_payload_state)); } } else if (command && strcmp(command, PLUGINSD_KEYWORD_FUNCTION_PAYLOAD) == 0) { nd_log(NDLS_ACCESS, NDLP_INFO, NULL); if (s->receiving_function_payload) { netdata_log_error("STREAM %s [send to %s] received %s command while already receiving function payload", rrdhost_hostname(s->host), s->connected_to, command); s->receiving_function_payload = false; buffer_free(s->function_payload.payload); s->function_payload.payload = NULL; // TODO send error response } char *transaction = get_word(s->line.words, s->line.num_words, 1); char *timeout_s = get_word(s->line.words, s->line.num_words, 2); char *function = get_word(s->line.words, s->line.num_words, 3); if(!transaction || !*transaction || !timeout_s || !*timeout_s || !function || !*function) { netdata_log_error("STREAM %s [send to %s] %s execution command is incomplete (transaction = '%s', timeout = '%s', function = '%s'). Ignoring it.", rrdhost_hostname(s->host), s->connected_to, command, transaction?transaction:"(unset)", timeout_s?timeout_s:"(unset)", function?function:"(unset)"); } s->receiving_function_payload = true; s->function_payload.payload = buffer_create(4096, &netdata_buffers_statistics.buffers_functions); s->function_payload.txid = strdupz(get_word(s->line.words, s->line.num_words, 1)); s->function_payload.timeout = strdupz(get_word(s->line.words, s->line.num_words, 2)); s->function_payload.fn_name = strdupz(get_word(s->line.words, s->line.num_words, 3)); } else if(command && strcmp(command, PLUGINSD_KEYWORD_FUNCTION_CANCEL) == 0) { worker_is_busy(WORKER_SENDER_JOB_FUNCTION_REQUEST); nd_log(NDLS_ACCESS, NDLP_DEBUG, NULL); char *transaction = get_word(s->line.words, s->line.num_words, 1); if(transaction && *transaction) rrd_function_cancel(transaction); } else if (command && strcmp(command, PLUGINSD_KEYWORD_REPLAY_CHART) == 0) { worker_is_busy(WORKER_SENDER_JOB_REPLAY_REQUEST); nd_log(NDLS_ACCESS, NDLP_DEBUG, NULL); const char *chart_id = get_word(s->line.words, s->line.num_words, 1); const char *start_streaming = get_word(s->line.words, s->line.num_words, 2); const char *after = get_word(s->line.words, s->line.num_words, 3); const char *before = get_word(s->line.words, s->line.num_words, 4); if (!chart_id || !start_streaming || !after || !before) { netdata_log_error("STREAM %s [send to %s] %s command is incomplete" " (chart=%s, start_streaming=%s, after=%s, before=%s)", rrdhost_hostname(s->host), s->connected_to, command, chart_id ? chart_id : "(unset)", start_streaming ? start_streaming : "(unset)", after ? after : "(unset)", before ? before : "(unset)"); } else { replication_add_request(s, chart_id, strtoll(after, NULL, 0), strtoll(before, NULL, 0), !strcmp(start_streaming, "true") ); } } else { netdata_log_error("STREAM %s [send to %s] received unknown command over connection: %s", rrdhost_hostname(s->host), s->connected_to, s->line.words[0]?s->line.words[0]:"(unset)"); } line_splitter_reset(&s->line); worker_is_busy(WORKER_SENDER_JOB_EXECUTE); start = newline + 1; } if (start < end) { memmove(s->read_buffer, start, end-start); s->read_len = end - start; } else { s->read_buffer[0] = '\0'; s->read_len = 0; } } struct rrdpush_sender_thread_data { RRDHOST *host; char *pipe_buffer; }; static bool rrdpush_sender_pipe_close(RRDHOST *host, int *pipe_fds, bool reopen) { static netdata_mutex_t mutex = NETDATA_MUTEX_INITIALIZER; bool ret = true; netdata_mutex_lock(&mutex); int new_pipe_fds[2]; if(reopen) { if(pipe(new_pipe_fds) != 0) { netdata_log_error("STREAM %s [send]: cannot create required pipe.", rrdhost_hostname(host)); new_pipe_fds[PIPE_READ] = -1; new_pipe_fds[PIPE_WRITE] = -1; ret = false; } } int old_pipe_fds[2]; old_pipe_fds[PIPE_READ] = pipe_fds[PIPE_READ]; old_pipe_fds[PIPE_WRITE] = pipe_fds[PIPE_WRITE]; if(reopen) { pipe_fds[PIPE_READ] = new_pipe_fds[PIPE_READ]; pipe_fds[PIPE_WRITE] = new_pipe_fds[PIPE_WRITE]; } else { pipe_fds[PIPE_READ] = -1; pipe_fds[PIPE_WRITE] = -1; } if(old_pipe_fds[PIPE_READ] > 2) close(old_pipe_fds[PIPE_READ]); if(old_pipe_fds[PIPE_WRITE] > 2) close(old_pipe_fds[PIPE_WRITE]); netdata_mutex_unlock(&mutex); return ret; } void rrdpush_signal_sender_to_wake_up(struct sender_state *s) { if(unlikely(s->tid == gettid())) return; RRDHOST *host = s->host; int pipe_fd = s->rrdpush_sender_pipe[PIPE_WRITE]; // signal the sender there are more data if (pipe_fd != -1 && write(pipe_fd, " ", 1) == -1) { netdata_log_error("STREAM %s [send]: cannot write to internal pipe.", rrdhost_hostname(host)); rrdpush_sender_pipe_close(host, s->rrdpush_sender_pipe, true); } } static bool rrdhost_set_sender(RRDHOST *host) { if(unlikely(!host->sender)) return false; bool ret = false; sender_lock(host->sender); if(!host->sender->tid) { rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED | RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN); host->rrdpush_sender_connection_counter++; host->sender->tid = gettid(); host->sender->last_state_since_t = now_realtime_sec(); host->sender->exit.reason = STREAM_HANDSHAKE_NEVER; ret = true; } sender_unlock(host->sender); rrdpush_reset_destinations_postpone_time(host); return ret; } static void rrdhost_clear_sender___while_having_sender_mutex(RRDHOST *host) { if(unlikely(!host->sender)) return; if(host->sender->tid == gettid()) { host->sender->tid = 0; host->sender->exit.shutdown = false; rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN | RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED | RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); host->sender->last_state_since_t = now_realtime_sec(); if(host->destination) { host->destination->since = host->sender->last_state_since_t; host->destination->reason = host->sender->exit.reason; } } rrdpush_reset_destinations_postpone_time(host); } static bool rrdhost_sender_should_exit(struct sender_state *s) { // check for outstanding cancellation requests netdata_thread_testcancel(); if(unlikely(!service_running(SERVICE_STREAMING))) { if(!s->exit.reason) s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_NETDATA_EXIT; return true; } if(unlikely(!rrdhost_has_rrdpush_sender_enabled(s->host))) { if(!s->exit.reason) s->exit.reason = STREAM_HANDSHAKE_NON_STREAMABLE_HOST; return true; } if(unlikely(s->exit.shutdown)) { if(!s->exit.reason) s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN; return true; } if(unlikely(rrdhost_flag_check(s->host, RRDHOST_FLAG_ORPHAN))) { if(!s->exit.reason) s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_ORPHAN_HOST; return true; } return false; } static void rrdpush_sender_thread_cleanup_callback(void *ptr) { struct rrdpush_sender_thread_data *s = ptr; worker_unregister(); RRDHOST *host = s->host; sender_lock(host->sender); netdata_log_info("STREAM %s [send]: sending thread exits %s", rrdhost_hostname(host), host->sender->exit.reason != STREAM_HANDSHAKE_NEVER ? stream_handshake_error_to_string(host->sender->exit.reason) : ""); rrdpush_sender_thread_close_socket(host); rrdpush_sender_pipe_close(host, host->sender->rrdpush_sender_pipe, false); rrdhost_clear_sender___while_having_sender_mutex(host); #ifdef NETDATA_LOG_STREAM_SENDER if(host->sender->stream_log_fp) { fclose(host->sender->stream_log_fp); host->sender->stream_log_fp = NULL; } #endif sender_unlock(host->sender); freez(s->pipe_buffer); freez(s); } void rrdpush_initialize_ssl_ctx(RRDHOST *host __maybe_unused) { #ifdef ENABLE_HTTPS static SPINLOCK sp = NETDATA_SPINLOCK_INITIALIZER; spinlock_lock(&sp); if(netdata_ssl_streaming_sender_ctx || !host) { spinlock_unlock(&sp); return; } for(struct rrdpush_destinations *d = host->destinations; d ; d = d->next) { if (d->ssl) { // we need to initialize SSL netdata_ssl_initialize_ctx(NETDATA_SSL_STREAMING_SENDER_CTX); ssl_security_location_for_context(netdata_ssl_streaming_sender_ctx, netdata_ssl_ca_file, netdata_ssl_ca_path); // stop the loop break; } } spinlock_unlock(&sp); #endif } static bool stream_sender_log_capabilities(BUFFER *wb, void *ptr) { struct sender_state *state = ptr; if(!state) return false; stream_capabilities_to_string(wb, state->capabilities); return true; } static bool stream_sender_log_transport(BUFFER *wb, void *ptr) { struct sender_state *state = ptr; if(!state) return false; #ifdef ENABLE_HTTPS buffer_strcat(wb, SSL_connection(&state->ssl) ? "https" : "http"); #else buffer_strcat(wb, "http"); #endif return true; } static bool stream_sender_log_dst_ip(BUFFER *wb, void *ptr) { struct sender_state *state = ptr; if(!state || state->rrdpush_sender_socket == -1) return false; SOCKET_PEERS peers = socket_peers(state->rrdpush_sender_socket); buffer_strcat(wb, peers.peer.ip); return true; } static bool stream_sender_log_dst_port(BUFFER *wb, void *ptr) { struct sender_state *state = ptr; if(!state || state->rrdpush_sender_socket == -1) return false; SOCKET_PEERS peers = socket_peers(state->rrdpush_sender_socket); buffer_print_uint64(wb, peers.peer.port); return true; } void *rrdpush_sender_thread(void *ptr) { struct sender_state *s = ptr; ND_LOG_STACK lgs[] = { ND_LOG_FIELD_STR(NDF_NIDL_NODE, s->host->hostname), ND_LOG_FIELD_CB(NDF_DST_IP, stream_sender_log_dst_ip, s), ND_LOG_FIELD_CB(NDF_DST_PORT, stream_sender_log_dst_port, s), ND_LOG_FIELD_CB(NDF_DST_TRANSPORT, stream_sender_log_transport, s), ND_LOG_FIELD_CB(NDF_SRC_CAPABILITIES, stream_sender_log_capabilities, s), ND_LOG_FIELD_END(), }; ND_LOG_STACK_PUSH(lgs); worker_register("STREAMSND"); worker_register_job_name(WORKER_SENDER_JOB_CONNECT, "connect"); worker_register_job_name(WORKER_SENDER_JOB_PIPE_READ, "pipe read"); worker_register_job_name(WORKER_SENDER_JOB_SOCKET_RECEIVE, "receive"); worker_register_job_name(WORKER_SENDER_JOB_EXECUTE, "execute"); worker_register_job_name(WORKER_SENDER_JOB_SOCKET_SEND, "send"); // disconnection reasons worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT, "disconnect timeout"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR, "disconnect poll error"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR, "disconnect socket error"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_OVERFLOW, "disconnect overflow"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR, "disconnect ssl error"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED, "disconnect parent closed"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR, "disconnect receive error"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR, "disconnect send error"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION, "disconnect no compression"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, "disconnect bad handshake"); worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION, "disconnect cant upgrade"); worker_register_job_name(WORKER_SENDER_JOB_REPLAY_REQUEST, "replay request"); worker_register_job_name(WORKER_SENDER_JOB_FUNCTION_REQUEST, "function"); worker_register_job_custom_metric(WORKER_SENDER_JOB_BUFFER_RATIO, "used buffer ratio", "%", WORKER_METRIC_ABSOLUTE); worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_RECEIVED, "bytes received", "bytes/s", WORKER_METRIC_INCREMENT); worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_SENT, "bytes sent", "bytes/s", WORKER_METRIC_INCREMENT); worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_COMPRESSED, "bytes compressed", "bytes/s", WORKER_METRIC_INCREMENTAL_TOTAL); worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_UNCOMPRESSED, "bytes uncompressed", "bytes/s", WORKER_METRIC_INCREMENTAL_TOTAL); worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO, "cumulative compression savings ratio", "%", WORKER_METRIC_ABSOLUTE); worker_register_job_custom_metric(WORKER_SENDER_JOB_REPLAY_DICT_SIZE, "replication dict entries", "entries", WORKER_METRIC_ABSOLUTE); if(!rrdhost_has_rrdpush_sender_enabled(s->host) || !s->host->rrdpush_send_destination || !*s->host->rrdpush_send_destination || !s->host->rrdpush_send_api_key || !*s->host->rrdpush_send_api_key) { netdata_log_error("STREAM %s [send]: thread created (task id %d), but host has streaming disabled.", rrdhost_hostname(s->host), gettid()); return NULL; } if(!rrdhost_set_sender(s->host)) { netdata_log_error("STREAM %s [send]: thread created (task id %d), but there is another sender running for this host.", rrdhost_hostname(s->host), gettid()); return NULL; } rrdpush_initialize_ssl_ctx(s->host); netdata_log_info("STREAM %s [send]: thread created (task id %d)", rrdhost_hostname(s->host), gettid()); s->timeout = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "timeout seconds", 600); s->default_port = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "default port", 19999); s->buffer->max_size = (size_t)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "buffer size bytes", 1024 * 1024 * 10); s->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); // TODO: REMOVE FOR SLEW / GAPFILLING s->parent_using_h2o = appconfig_get_boolean( &stream_config, CONFIG_SECTION_STREAM, "parent using h2o", false); // initialize rrdpush globals rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED); int pipe_buffer_size = 10 * 1024; #ifdef F_GETPIPE_SZ pipe_buffer_size = fcntl(s->rrdpush_sender_pipe[PIPE_READ], F_GETPIPE_SZ); #endif if(pipe_buffer_size < 10 * 1024) pipe_buffer_size = 10 * 1024; if(!rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true)) { netdata_log_error("STREAM %s [send]: cannot create inter-thread communication pipe. Disabling streaming.", rrdhost_hostname(s->host)); return NULL; } struct rrdpush_sender_thread_data *thread_data = callocz(1, sizeof(struct rrdpush_sender_thread_data)); thread_data->pipe_buffer = mallocz(pipe_buffer_size); thread_data->host = s->host; netdata_thread_cleanup_push(rrdpush_sender_thread_cleanup_callback, thread_data); size_t iterations = 0; time_t now_s = now_monotonic_sec(); while(!rrdhost_sender_should_exit(s)) { iterations++; // The connection attempt blocks (after which we use the socket in nonblocking) if(unlikely(s->rrdpush_sender_socket == -1)) { worker_is_busy(WORKER_SENDER_JOB_CONNECT); now_s = now_monotonic_sec(); rrdpush_sender_cbuffer_recreate_timed(s, now_s, false, true); rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); s->flags &= ~SENDER_FLAG_OVERFLOW; s->read_len = 0; s->buffer->read = 0; s->buffer->write = 0; if(!attempt_to_connect(s)) continue; if(rrdhost_sender_should_exit(s)) break; now_s = s->last_traffic_seen_t = now_monotonic_sec(); rrdpush_send_claimed_id(s->host); rrdpush_send_host_labels(s->host); rrdpush_send_global_functions(s->host); rrdpush_send_dyncfg(s->host); s->replication.oldest_request_after_t = 0; rrdhost_flag_set(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS); nd_log(NDLS_DAEMON, NDLP_DEBUG, "STREAM %s [send to %s]: enabling metrics streaming...", rrdhost_hostname(s->host), s->connected_to); continue; } if(iterations % 1000 == 0) now_s = now_monotonic_sec(); // If the TCP window never opened then something is wrong, restart connection if(unlikely(now_s - s->last_traffic_seen_t > s->timeout && !rrdpush_sender_pending_replication_requests(s) && !rrdpush_sender_replicating_charts(s) )) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT); netdata_log_error("STREAM %s [send to %s]: could not send metrics for %d seconds - closing connection - we have sent %zu bytes on this connection via %zu send attempts.", rrdhost_hostname(s->host), s->connected_to, s->timeout, s->sent_bytes_on_this_connection, s->send_attempts); rrdpush_sender_thread_close_socket(s->host); continue; } sender_lock(s); size_t outstanding = cbuffer_next_unsafe(s->buffer, NULL); size_t available = cbuffer_available_size_unsafe(s->buffer); if (unlikely(!outstanding)) { rrdpush_sender_pipe_clear_pending_data(s); rrdpush_sender_cbuffer_recreate_timed(s, now_s, true, false); } if(s->compressor.initialized) { size_t bytes_uncompressed = s->compressor.sender_locked.total_uncompressed; size_t bytes_compressed = s->compressor.sender_locked.total_compressed + s->compressor.sender_locked.total_compressions * sizeof(rrdpush_signature_t); NETDATA_DOUBLE ratio = 100.0 - ((NETDATA_DOUBLE)bytes_compressed * 100.0 / (NETDATA_DOUBLE)bytes_uncompressed); worker_set_metric(WORKER_SENDER_JOB_BYTES_UNCOMPRESSED, (NETDATA_DOUBLE)bytes_uncompressed); worker_set_metric(WORKER_SENDER_JOB_BYTES_COMPRESSED, (NETDATA_DOUBLE)bytes_compressed); worker_set_metric(WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO, ratio); } sender_unlock(s); worker_set_metric(WORKER_SENDER_JOB_BUFFER_RATIO, (NETDATA_DOUBLE)(s->buffer->max_size - available) * 100.0 / (NETDATA_DOUBLE)s->buffer->max_size); if(outstanding) s->send_attempts++; if(unlikely(s->rrdpush_sender_pipe[PIPE_READ] == -1)) { if(!rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true)) { netdata_log_error("STREAM %s [send]: cannot create inter-thread communication pipe. Disabling streaming.", rrdhost_hostname(s->host)); rrdpush_sender_thread_close_socket(s->host); break; } } worker_is_idle(); // Wait until buffer opens in the socket or a rrdset_done_push wakes us enum { Collector = 0, Socket = 1, }; struct pollfd fds[2] = { [Collector] = { .fd = s->rrdpush_sender_pipe[PIPE_READ], .events = POLLIN, .revents = 0, }, [Socket] = { .fd = s->rrdpush_sender_socket, .events = POLLIN | (outstanding ? POLLOUT : 0 ), .revents = 0, } }; int poll_rc = poll(fds, 2, 50); // timeout in milliseconds netdata_log_debug(D_STREAM, "STREAM: poll() finished collector=%d socket=%d (current chunk %zu bytes)...", fds[Collector].revents, fds[Socket].revents, outstanding); if(unlikely(rrdhost_sender_should_exit(s))) break; internal_error(fds[Collector].fd != s->rrdpush_sender_pipe[PIPE_READ], "STREAM %s [send to %s]: pipe changed after poll().", rrdhost_hostname(s->host), s->connected_to); internal_error(fds[Socket].fd != s->rrdpush_sender_socket, "STREAM %s [send to %s]: socket changed after poll().", rrdhost_hostname(s->host), s->connected_to); // Spurious wake-ups without error - loop again if (poll_rc == 0 || ((poll_rc == -1) && (errno == EAGAIN || errno == EINTR))) { netdata_thread_testcancel(); netdata_log_debug(D_STREAM, "Spurious wakeup"); now_s = now_monotonic_sec(); continue; } // Only errors from poll() are internal, but try restarting the connection if(unlikely(poll_rc == -1)) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR); netdata_log_error("STREAM %s [send to %s]: failed to poll(). Closing socket.", rrdhost_hostname(s->host), s->connected_to); rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true); rrdpush_sender_thread_close_socket(s->host); continue; } // If we have data and have seen the TCP window open then try to close it by a transmission. if(likely(outstanding && (fds[Socket].revents & POLLOUT))) { worker_is_busy(WORKER_SENDER_JOB_SOCKET_SEND); ssize_t bytes = attempt_to_send(s); if(bytes > 0) { s->last_traffic_seen_t = now_monotonic_sec(); worker_set_metric(WORKER_SENDER_JOB_BYTES_SENT, (NETDATA_DOUBLE)bytes); } } // If the collector woke us up then empty the pipe to remove the signal if (fds[Collector].revents & (POLLIN|POLLPRI)) { worker_is_busy(WORKER_SENDER_JOB_PIPE_READ); netdata_log_debug(D_STREAM, "STREAM: Data added to send buffer (current buffer chunk %zu bytes)...", outstanding); if (read(fds[Collector].fd, thread_data->pipe_buffer, pipe_buffer_size) == -1) netdata_log_error("STREAM %s [send to %s]: cannot read from internal pipe.", rrdhost_hostname(s->host), s->connected_to); } // Read as much as possible to fill the buffer, split into full lines for execution. if (fds[Socket].revents & POLLIN) { worker_is_busy(WORKER_SENDER_JOB_SOCKET_RECEIVE); ssize_t bytes = attempt_read(s); if(bytes > 0) { s->last_traffic_seen_t = now_monotonic_sec(); worker_set_metric(WORKER_SENDER_JOB_BYTES_RECEIVED, (NETDATA_DOUBLE)bytes); } } if(unlikely(s->read_len)) execute_commands(s); if(unlikely(fds[Collector].revents & (POLLERR|POLLHUP|POLLNVAL))) { char *error = NULL; if (unlikely(fds[Collector].revents & POLLERR)) error = "pipe reports errors (POLLERR)"; else if (unlikely(fds[Collector].revents & POLLHUP)) error = "pipe closed (POLLHUP)"; else if (unlikely(fds[Collector].revents & POLLNVAL)) error = "pipe is invalid (POLLNVAL)"; if(error) { rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true); netdata_log_error("STREAM %s [send to %s]: restarting internal pipe: %s.", rrdhost_hostname(s->host), s->connected_to, error); } } if(unlikely(fds[Socket].revents & (POLLERR|POLLHUP|POLLNVAL))) { char *error = NULL; if (unlikely(fds[Socket].revents & POLLERR)) error = "socket reports errors (POLLERR)"; else if (unlikely(fds[Socket].revents & POLLHUP)) error = "connection closed by remote end (POLLHUP)"; else if (unlikely(fds[Socket].revents & POLLNVAL)) error = "connection is invalid (POLLNVAL)"; if(unlikely(error)) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR); netdata_log_error("STREAM %s [send to %s]: restarting connection: %s - %zu bytes transmitted.", rrdhost_hostname(s->host), s->connected_to, error, s->sent_bytes_on_this_connection); rrdpush_sender_thread_close_socket(s->host); } } // protection from overflow if(unlikely(s->flags & SENDER_FLAG_OVERFLOW)) { worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_OVERFLOW); errno = 0; netdata_log_error("STREAM %s [send to %s]: buffer full (allocated %zu bytes) after sending %zu bytes. Restarting connection", rrdhost_hostname(s->host), s->connected_to, s->buffer->size, s->sent_bytes_on_this_connection); rrdpush_sender_thread_close_socket(s->host); } worker_set_metric(WORKER_SENDER_JOB_REPLAY_DICT_SIZE, (NETDATA_DOUBLE) dictionary_entries(s->replication.requests)); } netdata_thread_cleanup_pop(1); return NULL; }