// SPDX-License-Identifier: GPL-3.0-or-later #include "rrdpush.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 thread BUFFER * the sender thread is signalled via a pipe (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. * */ struct config stream_config = { .first_section = NULL, .last_section = NULL, .mutex = NETDATA_MUTEX_INITIALIZER, .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare }, .rwlock = AVL_LOCK_INITIALIZER } }; unsigned int default_rrdpush_enabled = 0; STREAM_CAPABILITIES globally_disabled_capabilities = STREAM_CAP_NONE; unsigned int default_rrdpush_compression_enabled = 1; char *default_rrdpush_destination = NULL; char *default_rrdpush_api_key = NULL; char *default_rrdpush_send_charts_matching = NULL; bool default_rrdpush_enable_replication = true; time_t default_rrdpush_seconds_to_replicate = 86400; time_t default_rrdpush_replication_step = 600; #ifdef ENABLE_HTTPS char *netdata_ssl_ca_path = NULL; char *netdata_ssl_ca_file = NULL; #endif static void load_stream_conf() { errno = 0; char *filename = strdupz_path_subpath(netdata_configured_user_config_dir, "stream.conf"); if(!appconfig_load(&stream_config, filename, 0, NULL)) { nd_log_daemon(NDLP_NOTICE, "CONFIG: cannot load user config '%s'. Will try stock config.", filename); freez(filename); filename = strdupz_path_subpath(netdata_configured_stock_config_dir, "stream.conf"); if(!appconfig_load(&stream_config, filename, 0, NULL)) nd_log_daemon(NDLP_NOTICE, "CONFIG: cannot load stock config '%s'. Running with internal defaults.", filename); } freez(filename); } bool rrdpush_receiver_needs_dbengine() { struct section *co; for(co = stream_config.first_section; co; co = co->next) { if(strcmp(co->name, "stream") == 0) continue; // the first section is not relevant char *s; s = appconfig_get_by_section(co, "enabled", NULL); if(!s || !appconfig_test_boolean_value(s)) continue; s = appconfig_get_by_section(co, "default memory mode", NULL); if(s && strcmp(s, "dbengine") == 0) return true; s = appconfig_get_by_section(co, "memory mode", NULL); if(s && strcmp(s, "dbengine") == 0) return true; } return false; } int rrdpush_init() { // -------------------------------------------------------------------- // load stream.conf load_stream_conf(); default_rrdpush_enabled = (unsigned int)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", ""); default_rrdpush_send_charts_matching = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "send charts matching", "*"); default_rrdpush_enable_replication = config_get_boolean(CONFIG_SECTION_DB, "enable replication", default_rrdpush_enable_replication); default_rrdpush_seconds_to_replicate = config_get_number(CONFIG_SECTION_DB, "seconds to replicate", default_rrdpush_seconds_to_replicate); default_rrdpush_replication_step = config_get_number(CONFIG_SECTION_DB, "seconds per replication step", default_rrdpush_replication_step); rrdhost_free_orphan_time_s = config_get_number(CONFIG_SECTION_DB, "cleanup orphan hosts after secs", rrdhost_free_orphan_time_s); default_rrdpush_compression_enabled = (unsigned int)appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "enable compression", default_rrdpush_compression_enabled); rrdpush_compression_levels[COMPRESSION_ALGORITHM_BROTLI] = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "brotli compression level", rrdpush_compression_levels[COMPRESSION_ALGORITHM_BROTLI]); rrdpush_compression_levels[COMPRESSION_ALGORITHM_ZSTD] = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "zstd compression level", rrdpush_compression_levels[COMPRESSION_ALGORITHM_ZSTD]); rrdpush_compression_levels[COMPRESSION_ALGORITHM_LZ4] = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "lz4 compression acceleration", rrdpush_compression_levels[COMPRESSION_ALGORITHM_LZ4]); rrdpush_compression_levels[COMPRESSION_ALGORITHM_GZIP] = (int)appconfig_get_number( &stream_config, CONFIG_SECTION_STREAM, "gzip compression level", rrdpush_compression_levels[COMPRESSION_ALGORITHM_GZIP]); if(default_rrdpush_enabled && (!default_rrdpush_destination || !*default_rrdpush_destination || !default_rrdpush_api_key || !*default_rrdpush_api_key)) { nd_log_daemon(NDLP_WARNING, "STREAM [send]: cannot enable sending thread - information is missing."); default_rrdpush_enabled = 0; } #ifdef ENABLE_HTTPS netdata_ssl_validate_certificate_sender = !appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "ssl skip certificate verification", !netdata_ssl_validate_certificate); if(!netdata_ssl_validate_certificate_sender) nd_log_daemon(NDLP_NOTICE, "SSL: streaming senders will skip SSL certificates verification."); netdata_ssl_ca_path = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "CApath", NULL); netdata_ssl_ca_file = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "CAfile", NULL); #endif return default_rrdpush_enabled; } // 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; static inline bool should_send_chart_matching(RRDSET *st, RRDSET_FLAGS flags) { if(!(flags & RRDSET_FLAG_RECEIVER_REPLICATION_FINISHED)) return false; if(unlikely(!(flags & (RRDSET_FLAG_UPSTREAM_SEND | RRDSET_FLAG_UPSTREAM_IGNORE)))) { RRDHOST *host = st->rrdhost; if (flags & RRDSET_FLAG_ANOMALY_DETECTION) { if(ml_streaming_enabled()) rrdset_flag_set(st, RRDSET_FLAG_UPSTREAM_SEND); else rrdset_flag_set(st, RRDSET_FLAG_UPSTREAM_IGNORE); } else if(simple_pattern_matches_string(host->rrdpush_send_charts_matching, st->id) || simple_pattern_matches_string(host->rrdpush_send_charts_matching, st->name)) rrdset_flag_set(st, RRDSET_FLAG_UPSTREAM_SEND); else rrdset_flag_set(st, RRDSET_FLAG_UPSTREAM_IGNORE); // get the flags again, to know how to respond flags = rrdset_flag_check(st, RRDSET_FLAG_UPSTREAM_SEND|RRDSET_FLAG_UPSTREAM_IGNORE); } return flags & RRDSET_FLAG_UPSTREAM_SEND; } int configured_as_parent() { struct section *section = NULL; int is_parent = 0; appconfig_wrlock(&stream_config); for (section = stream_config.first_section; section; section = section->next) { uuid_t uuid; if (uuid_parse(section->name, uuid) != -1 && appconfig_get_boolean_by_section(section, "enabled", 0)) { is_parent = 1; break; } } appconfig_unlock(&stream_config); return is_parent; } // chart labels static int send_clabels_callback(const char *name, const char *value, RRDLABEL_SRC ls, void *data) { BUFFER *wb = (BUFFER *)data; buffer_sprintf(wb, "CLABEL \"%s\" \"%s\" %d\n", name, value, ls & ~(RRDLABEL_FLAG_INTERNAL)); return 1; } static void rrdpush_send_clabels(BUFFER *wb, RRDSET *st) { if (st->rrdlabels) { if(rrdlabels_walkthrough_read(st->rrdlabels, send_clabels_callback, wb) > 0) buffer_sprintf(wb, "CLABEL_COMMIT\n"); } } // Send the current chart definition. // Assumes that collector thread has already called sender_start for mutex / buffer state. static inline bool rrdpush_send_chart_definition(BUFFER *wb, RRDSET *st) { uint32_t version = rrdset_metadata_version(st); RRDHOST *host = st->rrdhost; NUMBER_ENCODING integer_encoding = stream_has_capability(host->sender, STREAM_CAP_IEEE754) ? NUMBER_ENCODING_BASE64 : NUMBER_ENCODING_HEX; bool with_slots = stream_has_capability(host->sender, STREAM_CAP_SLOTS) ? true : false; bool replication_progress = false; // properly set the name for the remote end to parse it char *name = ""; if(likely(st->name)) { if(unlikely(st->id != st->name)) { // they differ name = strchr(rrdset_name(st), '.'); if(name) name++; else name = ""; } } buffer_fast_strcat(wb, PLUGINSD_KEYWORD_CHART, sizeof(PLUGINSD_KEYWORD_CHART) - 1); if(with_slots) { buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2); buffer_print_uint64_encoded(wb, integer_encoding, st->rrdpush.sender.chart_slot); } // send the chart buffer_sprintf( wb , " \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" %d %d \"%s %s %s %s\" \"%s\" \"%s\"\n" , rrdset_id(st) , name , rrdset_title(st) , rrdset_units(st) , rrdset_family(st) , rrdset_context(st) , 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":"" , rrdset_plugin_name(st) , rrdset_module_name(st) ); // send the chart labels if (stream_has_capability(host->sender, STREAM_CAP_CLABELS)) rrdpush_send_clabels(wb, st); // send the dimensions RRDDIM *rd; rrddim_foreach_read(rd, st) { buffer_fast_strcat(wb, PLUGINSD_KEYWORD_DIMENSION, sizeof(PLUGINSD_KEYWORD_DIMENSION) - 1); if(with_slots) { buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2); buffer_print_uint64_encoded(wb, integer_encoding, rd->rrdpush.sender.dim_slot); } buffer_sprintf( wb , " \"%s\" \"%s\" \"%s\" %d %d \"%s %s %s\"\n" , rrddim_id(rd) , rrddim_name(rd) , rrd_algorithm_name(rd->algorithm) , rd->multiplier , rd->divisor , rrddim_flag_check(rd, RRDDIM_FLAG_OBSOLETE)?"obsolete":"" , rrddim_option_check(rd, RRDDIM_OPTION_HIDDEN)?"hidden":"" , rrddim_option_check(rd, RRDDIM_OPTION_DONT_DETECT_RESETS_OR_OVERFLOWS)?"noreset":"" ); } rrddim_foreach_done(rd); // send the chart functions if(stream_has_capability(host->sender, STREAM_CAP_FUNCTIONS)) rrd_functions_expose_rrdpush(st, wb); // send the chart local custom variables rrdsetvar_print_to_streaming_custom_chart_variables(st, wb); if (stream_has_capability(host->sender, STREAM_CAP_REPLICATION)) { time_t db_first_time_t, db_last_time_t; time_t now = now_realtime_sec(); rrdset_get_retention_of_tier_for_collected_chart(st, &db_first_time_t, &db_last_time_t, now, 0); buffer_sprintf(wb, PLUGINSD_KEYWORD_CHART_DEFINITION_END " %llu %llu %llu\n", (unsigned long long)db_first_time_t, (unsigned long long)db_last_time_t, (unsigned long long)now); if(!rrdset_flag_check(st, RRDSET_FLAG_SENDER_REPLICATION_IN_PROGRESS)) { rrdset_flag_set(st, RRDSET_FLAG_SENDER_REPLICATION_IN_PROGRESS); rrdset_flag_clear(st, RRDSET_FLAG_SENDER_REPLICATION_FINISHED); rrdhost_sender_replicating_charts_plus_one(st->rrdhost); } replication_progress = true; #ifdef NETDATA_LOG_REPLICATION_REQUESTS internal_error(true, "REPLAY: 'host:%s/chart:%s' replication starts", rrdhost_hostname(st->rrdhost), rrdset_id(st)); #endif } sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); // we can set the exposed flag, after we commit the buffer // because replication may pick it up prematurely rrddim_foreach_read(rd, st) { rrddim_metadata_exposed_upstream(rd, version); } rrddim_foreach_done(rd); rrdset_metadata_exposed_upstream(st, version); st->rrdpush.sender.resync_time_s = st->last_collected_time.tv_sec + (remote_clock_resync_iterations * st->update_every); return replication_progress; } // sends the current chart dimensions static void rrdpush_send_chart_metrics(BUFFER *wb, RRDSET *st, struct sender_state *s __maybe_unused, RRDSET_FLAGS flags) { buffer_fast_strcat(wb, "BEGIN \"", 7); buffer_fast_strcat(wb, rrdset_id(st), string_strlen(st->id)); buffer_fast_strcat(wb, "\" ", 2); if(st->last_collected_time.tv_sec > st->rrdpush.sender.resync_time_s) buffer_print_uint64(wb, st->usec_since_last_update); else buffer_fast_strcat(wb, "0", 1); buffer_fast_strcat(wb, "\n", 1); RRDDIM *rd; rrddim_foreach_read(rd, st) { if(unlikely(!rrddim_check_updated(rd))) continue; if(likely(rrddim_check_upstream_exposed_collector(rd))) { buffer_fast_strcat(wb, "SET \"", 5); buffer_fast_strcat(wb, rrddim_id(rd), string_strlen(rd->id)); buffer_fast_strcat(wb, "\" = ", 4); buffer_print_int64(wb, rd->collector.collected_value); buffer_fast_strcat(wb, "\n", 1); } else { internal_error(true, "STREAM: 'host:%s/chart:%s/dim:%s' flag 'exposed' is updated but not exposed", rrdhost_hostname(st->rrdhost), rrdset_id(st), rrddim_id(rd)); // we will include it in the next iteration rrddim_metadata_updated(rd); } } rrddim_foreach_done(rd); if(unlikely(flags & RRDSET_FLAG_UPSTREAM_SEND_VARIABLES)) rrdsetvar_print_to_streaming_custom_chart_variables(st, wb); buffer_fast_strcat(wb, "END\n", 4); } static void rrdpush_sender_thread_spawn(RRDHOST *host); // Called from the internal collectors to mark a chart obsolete. bool rrdset_push_chart_definition_now(RRDSET *st) { RRDHOST *host = st->rrdhost; if(unlikely(!rrdhost_can_send_definitions_to_parent(host) || !should_send_chart_matching(st, rrdset_flag_get(st)))) { return false; } BUFFER *wb = sender_start(host->sender); rrdpush_send_chart_definition(wb, st); sender_thread_buffer_free(); return true; } void rrdset_push_metrics_v1(RRDSET_STREAM_BUFFER *rsb, RRDSET *st) { RRDHOST *host = st->rrdhost; rrdpush_send_chart_metrics(rsb->wb, st, host->sender, rsb->rrdset_flags); } void rrddim_push_metrics_v2(RRDSET_STREAM_BUFFER *rsb, RRDDIM *rd, usec_t point_end_time_ut, NETDATA_DOUBLE n, SN_FLAGS flags) { if(!rsb->wb || !rsb->v2 || !netdata_double_isnumber(n) || !does_storage_number_exist(flags)) return; bool with_slots = stream_has_capability(rsb, STREAM_CAP_SLOTS) ? true : false; NUMBER_ENCODING integer_encoding = stream_has_capability(rsb, STREAM_CAP_IEEE754) ? NUMBER_ENCODING_BASE64 : NUMBER_ENCODING_HEX; NUMBER_ENCODING doubles_encoding = stream_has_capability(rsb, STREAM_CAP_IEEE754) ? NUMBER_ENCODING_BASE64 : NUMBER_ENCODING_DECIMAL; BUFFER *wb = rsb->wb; time_t point_end_time_s = (time_t)(point_end_time_ut / USEC_PER_SEC); if(unlikely(rsb->last_point_end_time_s != point_end_time_s)) { if(unlikely(rsb->begin_v2_added)) buffer_fast_strcat(wb, PLUGINSD_KEYWORD_END_V2 "\n", sizeof(PLUGINSD_KEYWORD_END_V2) - 1 + 1); buffer_fast_strcat(wb, PLUGINSD_KEYWORD_BEGIN_V2, sizeof(PLUGINSD_KEYWORD_BEGIN_V2) - 1); if(with_slots) { buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2); buffer_print_uint64_encoded(wb, integer_encoding, rd->rrdset->rrdpush.sender.chart_slot); } buffer_fast_strcat(wb, " '", 2); buffer_fast_strcat(wb, rrdset_id(rd->rrdset), string_strlen(rd->rrdset->id)); buffer_fast_strcat(wb, "' ", 2); buffer_print_uint64_encoded(wb, integer_encoding, rd->rrdset->update_every); buffer_fast_strcat(wb, " ", 1); buffer_print_uint64_encoded(wb, integer_encoding, point_end_time_s); buffer_fast_strcat(wb, " ", 1); if(point_end_time_s == rsb->wall_clock_time) buffer_fast_strcat(wb, "#", 1); else buffer_print_uint64_encoded(wb, integer_encoding, rsb->wall_clock_time); buffer_fast_strcat(wb, "\n", 1); rsb->last_point_end_time_s = point_end_time_s; rsb->begin_v2_added = true; } buffer_fast_strcat(wb, PLUGINSD_KEYWORD_SET_V2, sizeof(PLUGINSD_KEYWORD_SET_V2) - 1); if(with_slots) { buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2); buffer_print_uint64_encoded(wb, integer_encoding, rd->rrdpush.sender.dim_slot); } buffer_fast_strcat(wb, " '", 2); buffer_fast_strcat(wb, rrddim_id(rd), string_strlen(rd->id)); buffer_fast_strcat(wb, "' ", 2); buffer_print_int64_encoded(wb, integer_encoding, rd->collector.last_collected_value); buffer_fast_strcat(wb, " ", 1); if((NETDATA_DOUBLE)rd->collector.last_collected_value == n) buffer_fast_strcat(wb, "#", 1); else buffer_print_netdata_double_encoded(wb, doubles_encoding, n); buffer_fast_strcat(wb, " ", 1); buffer_print_sn_flags(wb, flags, true); buffer_fast_strcat(wb, "\n", 1); } void rrdset_push_metrics_finished(RRDSET_STREAM_BUFFER *rsb, RRDSET *st) { if(!rsb->wb) return; if(rsb->v2 && rsb->begin_v2_added) { if(unlikely(rsb->rrdset_flags & RRDSET_FLAG_UPSTREAM_SEND_VARIABLES)) rrdsetvar_print_to_streaming_custom_chart_variables(st, rsb->wb); buffer_fast_strcat(rsb->wb, PLUGINSD_KEYWORD_END_V2 "\n", sizeof(PLUGINSD_KEYWORD_END_V2) - 1 + 1); } sender_commit(st->rrdhost->sender, rsb->wb, STREAM_TRAFFIC_TYPE_DATA); *rsb = (RRDSET_STREAM_BUFFER){ .wb = NULL, }; } // TODO enable this macro before release #define bail_if_no_cap(cap) \ if(unlikely(!stream_has_capability(host->sender, cap))) { \ return; \ } #define dyncfg_check_can_push(host) \ if(unlikely(!rrdhost_can_send_definitions_to_parent(host))) \ return; \ bail_if_no_cap(STREAM_CAP_DYNCFG) // assumes job is locked and acquired!!! void rrdpush_send_job_status_update(RRDHOST *host, const char *plugin_name, const char *module_name, struct job *job) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_REPORT_JOB_STATUS " %s %s %s %s %d", plugin_name, module_name, job->name, job_status2str(job->status), job->state); if (job->reason && strlen(job->reason)) buffer_sprintf(wb, " \"%s\"", job->reason); buffer_strcat(wb, "\n"); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_DYNCFG); sender_thread_buffer_free(); job->dirty = 0; } void rrdpush_send_job_deleted(RRDHOST *host, const char *plugin_name, const char *module_name, const char *job_name) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_DELETE_JOB " %s %s %s\n", plugin_name, module_name, job_name); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_DYNCFG); sender_thread_buffer_free(); } RRDSET_STREAM_BUFFER rrdset_push_metric_initialize(RRDSET *st, time_t wall_clock_time) { RRDHOST *host = st->rrdhost; // fetch the flags we need to check with one atomic operation RRDHOST_FLAGS host_flags = __atomic_load_n(&host->flags, __ATOMIC_SEQ_CST); // check if we are not connected if(unlikely(!(host_flags & RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS))) { if(unlikely(!(host_flags & (RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN | RRDHOST_FLAG_RRDPUSH_RECEIVER_DISCONNECTED)))) rrdpush_sender_thread_spawn(host); if(unlikely(!(host_flags & RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS))) { rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS); nd_log_daemon(NDLP_NOTICE, "STREAM %s [send]: not ready - collected metrics are not sent to parent.", rrdhost_hostname(host)); } return (RRDSET_STREAM_BUFFER) { .wb = NULL, }; } else if(unlikely(host_flags & RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS)) { nd_log_daemon(NDLP_INFO, "STREAM %s [send]: sending metrics to parent...", rrdhost_hostname(host)); rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS); } if(unlikely(host_flags & RRDHOST_FLAG_GLOBAL_FUNCTIONS_UPDATED)) { BUFFER *wb = sender_start(host->sender); rrd_functions_expose_global_rrdpush(host, wb); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS); } bool exposed_upstream = rrdset_check_upstream_exposed(st); RRDSET_FLAGS rrdset_flags = rrdset_flag_get(st); bool replication_in_progress = !(rrdset_flags & RRDSET_FLAG_SENDER_REPLICATION_FINISHED); if(unlikely((exposed_upstream && replication_in_progress) || !should_send_chart_matching(st, rrdset_flags))) return (RRDSET_STREAM_BUFFER) { .wb = NULL, }; if(unlikely(!exposed_upstream)) { BUFFER *wb = sender_start(host->sender); replication_in_progress = rrdpush_send_chart_definition(wb, st); } if(replication_in_progress) return (RRDSET_STREAM_BUFFER) { .wb = NULL, }; return (RRDSET_STREAM_BUFFER) { .capabilities = host->sender->capabilities, .v2 = stream_has_capability(host->sender, STREAM_CAP_INTERPOLATED), .rrdset_flags = rrdset_flags, .wb = sender_start(host->sender), .wall_clock_time = wall_clock_time, }; } // labels static int send_labels_callback(const char *name, const char *value, RRDLABEL_SRC ls, void *data) { BUFFER *wb = (BUFFER *)data; buffer_sprintf(wb, "LABEL \"%s\" = %d \"%s\"\n", name, ls, value); return 1; } void rrdpush_send_host_labels(RRDHOST *host) { if(unlikely(!rrdhost_can_send_definitions_to_parent(host) || !stream_has_capability(host->sender, STREAM_CAP_HLABELS))) return; BUFFER *wb = sender_start(host->sender); rrdlabels_walkthrough_read(host->rrdlabels, send_labels_callback, wb); buffer_sprintf(wb, "OVERWRITE %s\n", "labels"); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); } void rrdpush_send_global_functions(RRDHOST *host) { if(!stream_has_capability(host->sender, STREAM_CAP_FUNCTIONS)) return; if(unlikely(!rrdhost_can_send_definitions_to_parent(host))) return; BUFFER *wb = sender_start(host->sender); rrd_functions_expose_global_rrdpush(host, wb); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS); sender_thread_buffer_free(); } void rrdpush_send_dyncfg(RRDHOST *host) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); DICTIONARY *plugins_dict = host->configurable_plugins; struct configurable_plugin *plug; dfe_start_read(plugins_dict, plug) { buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_ENABLE " %s\n", plug->name); struct module *mod; dfe_start_read(plug->modules, mod) { buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_REGISTER_MODULE " %s %s %s\n", plug->name, mod->name, module_type2str(mod->type)); struct job *job; dfe_start_read(mod->jobs, job) { pthread_mutex_lock(&job->lock); buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_REGISTER_JOB " %s %s %s %s %"PRIu32"\n", plug->name, mod->name, job->name, job_type2str(job->type), job->flags); buffer_sprintf(wb, PLUGINSD_KEYWORD_REPORT_JOB_STATUS " %s %s %s %s %d", plug->name, mod->name, job->name, job_status2str(job->status), job->state); if (job->reason) buffer_sprintf(wb, " \"%s\"", job->reason); buffer_sprintf(wb, "\n"); job->dirty = 0; pthread_mutex_unlock(&job->lock); } dfe_done(job); } dfe_done(mod); } dfe_done(plug); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_DYNCFG); sender_thread_buffer_free(); } void rrdpush_send_dyncfg_enable(RRDHOST *host, const char *plugin_name) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_ENABLE " %s\n", plugin_name); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); } void rrdpush_send_dyncfg_reg_module(RRDHOST *host, const char *plugin_name, const char *module_name, enum module_type type) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_REGISTER_MODULE " %s %s %s\n", plugin_name, module_name, module_type2str(type)); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_DYNCFG); sender_thread_buffer_free(); } void rrdpush_send_dyncfg_reg_job(RRDHOST *host, const char *plugin_name, const char *module_name, const char *job_name, enum job_type type, uint32_t flags) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_REGISTER_JOB " %s %s %s %s %"PRIu32"\n", plugin_name, module_name, job_name, job_type2str(type), flags); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_DYNCFG); sender_thread_buffer_free(); } void rrdpush_send_dyncfg_reset(RRDHOST *host, const char *plugin_name) { dyncfg_check_can_push(host); BUFFER *wb = sender_start(host->sender); buffer_sprintf(wb, PLUGINSD_KEYWORD_DYNCFG_RESET " %s\n", plugin_name); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); } void rrdpush_send_claimed_id(RRDHOST *host) { if(!stream_has_capability(host->sender, STREAM_CAP_CLAIM)) return; if(unlikely(!rrdhost_can_send_definitions_to_parent(host))) return; BUFFER *wb = sender_start(host->sender); rrdhost_aclk_state_lock(host); buffer_sprintf(wb, "CLAIMED_ID %s %s\n", host->machine_guid, (host->aclk_state.claimed_id ? host->aclk_state.claimed_id : "NULL") ); rrdhost_aclk_state_unlock(host); sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA); sender_thread_buffer_free(); } int connect_to_one_of_destinations( RRDHOST *host, int default_port, struct timeval *timeout, size_t *reconnects_counter, char *connected_to, size_t connected_to_size, struct rrdpush_destinations **destination) { int sock = -1; for (struct rrdpush_destinations *d = host->destinations; d; d = d->next) { time_t now = now_realtime_sec(); if(d->postpone_reconnection_until > now) continue; nd_log(NDLS_DAEMON, NDLP_DEBUG, "STREAM %s: connecting to '%s' (default port: %d)...", rrdhost_hostname(host), string2str(d->destination), default_port); if (reconnects_counter) *reconnects_counter += 1; d->since = now; d->attempts++; sock = connect_to_this(string2str(d->destination), default_port, timeout); if (sock != -1) { if (connected_to && connected_to_size) strncpyz(connected_to, string2str(d->destination), connected_to_size); *destination = d; // move the current item to the end of the list // without this, this destination will break the loop again and again // not advancing the destinations to find one that may work DOUBLE_LINKED_LIST_REMOVE_ITEM_UNSAFE(host->destinations, d, prev, next); DOUBLE_LINKED_LIST_APPEND_ITEM_UNSAFE(host->destinations, d, prev, next); break; } } return sock; } struct destinations_init_tmp { RRDHOST *host; struct rrdpush_destinations *list; int count; }; bool destinations_init_add_one(char *entry, void *data) { struct destinations_init_tmp *t = data; struct rrdpush_destinations *d = callocz(1, sizeof(struct rrdpush_destinations)); char *colon_ssl = strstr(entry, ":SSL"); if(colon_ssl) { *colon_ssl = '\0'; d->ssl = true; } else d->ssl = false; d->destination = string_strdupz(entry); __atomic_add_fetch(&netdata_buffers_statistics.rrdhost_senders, sizeof(struct rrdpush_destinations), __ATOMIC_RELAXED); DOUBLE_LINKED_LIST_APPEND_ITEM_UNSAFE(t->list, d, prev, next); t->count++; nd_log_daemon(NDLP_INFO, "STREAM: added streaming destination No %d: '%s' to host '%s'", t->count, string2str(d->destination), rrdhost_hostname(t->host)); return false; // we return false, so that we will get all defined destinations } void rrdpush_destinations_init(RRDHOST *host) { if(!host->rrdpush_send_destination) return; rrdpush_destinations_free(host); struct destinations_init_tmp t = { .host = host, .list = NULL, .count = 0, }; foreach_entry_in_connection_string(host->rrdpush_send_destination, destinations_init_add_one, &t); host->destinations = t.list; } void rrdpush_destinations_free(RRDHOST *host) { while (host->destinations) { struct rrdpush_destinations *tmp = host->destinations; DOUBLE_LINKED_LIST_REMOVE_ITEM_UNSAFE(host->destinations, tmp, prev, next); string_freez(tmp->destination); freez(tmp); __atomic_sub_fetch(&netdata_buffers_statistics.rrdhost_senders, sizeof(struct rrdpush_destinations), __ATOMIC_RELAXED); } host->destinations = NULL; } // ---------------------------------------------------------------------------- // rrdpush sender thread // Either the receiver lost the connection or the host is being destroyed. // The sender mutex guards thread creation, any spurious data is wiped on reconnection. void rrdpush_sender_thread_stop(RRDHOST *host, STREAM_HANDSHAKE reason, bool wait) { if (!host->sender) return; sender_lock(host->sender); if(rrdhost_flag_check(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN)) { host->sender->exit.shutdown = true; host->sender->exit.reason = reason; // signal it to cancel netdata_thread_cancel(host->rrdpush_sender_thread); } sender_unlock(host->sender); if(wait) { sender_lock(host->sender); while(host->sender->tid) { sender_unlock(host->sender); sleep_usec(10 * USEC_PER_MS); sender_lock(host->sender); } sender_unlock(host->sender); } } // ---------------------------------------------------------------------------- // rrdpush receiver thread static void rrdpush_sender_thread_spawn(RRDHOST *host) { sender_lock(host->sender); if(!rrdhost_flag_check(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN)) { char tag[NETDATA_THREAD_TAG_MAX + 1]; snprintfz(tag, NETDATA_THREAD_TAG_MAX, THREAD_TAG_STREAM_SENDER "[%s]", rrdhost_hostname(host)); if(netdata_thread_create(&host->rrdpush_sender_thread, tag, NETDATA_THREAD_OPTION_DEFAULT, rrdpush_sender_thread, (void *) host->sender)) nd_log_daemon(NDLP_ERR, "STREAM %s [send]: failed to create new thread for client.", rrdhost_hostname(host)); else rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN); } sender_unlock(host->sender); } 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_strcat(w->response.data, START_STREAMING_ERROR_NOT_PERMITTED); return HTTP_RESP_UNAUTHORIZED; } int rrdpush_receiver_too_busy_now(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_strcat(w->response.data, START_STREAMING_ERROR_BUSY_TRY_LATER); return HTTP_RESP_SERVICE_UNAVAILABLE; } static void rrdpush_receiver_takeover_web_connection(struct web_client *w, struct receiver_state *rpt) { rpt->fd = w->ifd; #ifdef ENABLE_HTTPS rpt->ssl.conn = w->ssl.conn; rpt->ssl.state = w->ssl.state; w->ssl = NETDATA_SSL_UNSET_CONNECTION; #endif WEB_CLIENT_IS_DEAD(w); 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); } void *rrdpush_receiver_thread(void *ptr); int rrdpush_receiver_thread_spawn(struct web_client *w, char *decoded_query_string, void *h2o_ctx) { if(!service_running(ABILITY_STREAMING_CONNECTIONS)) return rrdpush_receiver_too_busy_now(w); struct receiver_state *rpt = callocz(1, sizeof(*rpt)); rpt->last_msg_t = now_monotonic_sec(); rpt->hops = 1; rpt->capabilities = STREAM_CAP_INVALID; #ifdef ENABLE_H2O rpt->h2o_ctx = h2o_ctx; #endif __atomic_add_fetch(&netdata_buffers_statistics.rrdhost_receivers, sizeof(*rpt), __ATOMIC_RELAXED); __atomic_add_fetch(&netdata_buffers_statistics.rrdhost_allocations_size, sizeof(struct rrdhost_system_info), __ATOMIC_RELAXED); rpt->system_info = callocz(1, sizeof(struct rrdhost_system_info)); rpt->system_info->hops = rpt->hops; rpt->fd = -1; rpt->client_ip = strdupz(w->client_ip); rpt->client_port = strdupz(w->client_port); #ifdef ENABLE_HTTPS rpt->ssl = NETDATA_SSL_UNSET_CONNECTION; #endif rpt->config.update_every = default_rrd_update_every; // parse the parameters and fill rpt and rpt->system_info while(decoded_query_string) { char *value = strsep_skip_consecutive_separators(&decoded_query_string, "&"); if(!value || !*value) continue; char *name = strsep_skip_consecutive_separators(&value, "="); if(!name || !*name) continue; if(!value || !*value) continue; if(!strcmp(name, "key") && !rpt->key) rpt->key = strdupz(value); else if(!strcmp(name, "hostname") && !rpt->hostname) rpt->hostname = strdupz(value); else if(!strcmp(name, "registry_hostname") && !rpt->registry_hostname) rpt->registry_hostname = strdupz(value); else if(!strcmp(name, "machine_guid") && !rpt->machine_guid) rpt->machine_guid = strdupz(value); else if(!strcmp(name, "update_every")) rpt->config.update_every = (int)strtoul(value, NULL, 0); else if(!strcmp(name, "os") && !rpt->os) rpt->os = strdupz(value); else if(!strcmp(name, "timezone") && !rpt->timezone) rpt->timezone = strdupz(value); else if(!strcmp(name, "abbrev_timezone") && !rpt->abbrev_timezone) rpt->abbrev_timezone = strdupz(value); else if(!strcmp(name, "utc_offset")) rpt->utc_offset = (int32_t)strtol(value, NULL, 0); else if(!strcmp(name, "hops")) rpt->hops = rpt->system_info->hops = (uint16_t) strtoul(value, NULL, 0); else if(!strcmp(name, "ml_capable")) rpt->system_info->ml_capable = strtoul(value, NULL, 0); else if(!strcmp(name, "ml_enabled")) rpt->system_info->ml_enabled = strtoul(value, NULL, 0); else if(!strcmp(name, "mc_version")) rpt->system_info->mc_version = strtoul(value, NULL, 0); else if(!strcmp(name, "tags") && !rpt->tags) rpt->tags = strdupz(value); else if(!strcmp(name, "ver") && (rpt->capabilities & STREAM_CAP_INVALID)) rpt->capabilities = convert_stream_version_to_capabilities(strtoul(value, NULL, 0), NULL, false); else { // An old Netdata child does not have a compatible streaming protocol, map to something sane. if (!strcmp(name, "NETDATA_SYSTEM_OS_NAME")) name = "NETDATA_HOST_OS_NAME"; else if (!strcmp(name, "NETDATA_SYSTEM_OS_ID")) name = "NETDATA_HOST_OS_ID"; else if (!strcmp(name, "NETDATA_SYSTEM_OS_ID_LIKE")) name = "NETDATA_HOST_OS_ID_LIKE"; else if (!strcmp(name, "NETDATA_SYSTEM_OS_VERSION")) name = "NETDATA_HOST_OS_VERSION"; else if (!strcmp(name, "NETDATA_SYSTEM_OS_VERSION_ID")) name = "NETDATA_HOST_OS_VERSION_ID"; else if (!strcmp(name, "NETDATA_SYSTEM_OS_DETECTION")) name = "NETDATA_HOST_OS_DETECTION"; else if(!strcmp(name, "NETDATA_PROTOCOL_VERSION") && (rpt->capabilities & STREAM_CAP_INVALID)) rpt->capabilities = convert_stream_version_to_capabilities(1, NULL, false); if (unlikely(rrdhost_set_system_info_variable(rpt->system_info, name, value))) { nd_log_daemon(NDLP_NOTICE, "STREAM '%s' [receive from [%s]:%s]: " "request has parameter '%s' = '%s', which is not used." , (rpt->hostname && *rpt->hostname) ? rpt->hostname : "-" , rpt->client_ip, rpt->client_port , name, value); } } } if (rpt->capabilities & STREAM_CAP_INVALID) // no version is supplied, assume version 0; rpt->capabilities = convert_stream_version_to_capabilities(0, NULL, false); // find the program name and version 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); } // check if we should accept this connection if(!rpt->key || !*rpt->key) { rrdpush_receive_log_status( rpt, "request without an API key, rejecting connection", RRDPUSH_STATUS_NO_API_KEY, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } if(!rpt->hostname || !*rpt->hostname) { rrdpush_receive_log_status( rpt, "request without a hostname, rejecting connection", RRDPUSH_STATUS_NO_HOSTNAME, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } if(!rpt->registry_hostname) rpt->registry_hostname = strdupz(rpt->hostname); if(!rpt->machine_guid || !*rpt->machine_guid) { rrdpush_receive_log_status( rpt, "request without a machine GUID, rejecting connection", RRDPUSH_STATUS_NO_MACHINE_GUID, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } { char buf[GUID_LEN + 1]; if (regenerate_guid(rpt->key, buf) == -1) { rrdpush_receive_log_status( rpt, "API key is not a valid UUID (use the command uuidgen to generate one)", RRDPUSH_STATUS_INVALID_API_KEY, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } if (regenerate_guid(rpt->machine_guid, buf) == -1) { rrdpush_receive_log_status( rpt, "machine GUID is not a valid UUID", RRDPUSH_STATUS_INVALID_MACHINE_GUID, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } } const char *api_key_type = appconfig_get(&stream_config, rpt->key, "type", "api"); if(!api_key_type || !*api_key_type) api_key_type = "unknown"; if(strcmp(api_key_type, "api") != 0) { rrdpush_receive_log_status( rpt, "API key is a machine GUID", RRDPUSH_STATUS_INVALID_API_KEY, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } if(!appconfig_get_boolean(&stream_config, rpt->key, "enabled", 0)) { rrdpush_receive_log_status( rpt, "API key is not enabled", RRDPUSH_STATUS_API_KEY_DISABLED, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } { SIMPLE_PATTERN *key_allow_from = simple_pattern_create( appconfig_get(&stream_config, rpt->key, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT, true); if(key_allow_from) { if(!simple_pattern_matches(key_allow_from, w->client_ip)) { simple_pattern_free(key_allow_from); rrdpush_receive_log_status( rpt, "API key is not allowed from this IP", RRDPUSH_STATUS_NOT_ALLOWED_IP, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } simple_pattern_free(key_allow_from); } } { const char *machine_guid_type = appconfig_get(&stream_config, rpt->machine_guid, "type", "machine"); if (!machine_guid_type || !*machine_guid_type) machine_guid_type = "unknown"; if (strcmp(machine_guid_type, "machine") != 0) { rrdpush_receive_log_status( rpt, "machine GUID is an API key", RRDPUSH_STATUS_INVALID_MACHINE_GUID, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } } if(!appconfig_get_boolean(&stream_config, rpt->machine_guid, "enabled", 1)) { rrdpush_receive_log_status( rpt, "machine GUID is not enabled", RRDPUSH_STATUS_MACHINE_GUID_DISABLED, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } { SIMPLE_PATTERN *machine_allow_from = simple_pattern_create( appconfig_get(&stream_config, rpt->machine_guid, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT, true); if(machine_allow_from) { if(!simple_pattern_matches(machine_allow_from, w->client_ip)) { simple_pattern_free(machine_allow_from); rrdpush_receive_log_status( rpt, "machine GUID is not allowed from this IP", RRDPUSH_STATUS_NOT_ALLOWED_IP, NDLP_WARNING); receiver_state_free(rpt); return rrdpush_receiver_permission_denied(w); } simple_pattern_free(machine_allow_from); } } if (strcmp(rpt->machine_guid, localhost->machine_guid) == 0) { rrdpush_receiver_takeover_web_connection(w, rpt); rrdpush_receive_log_status( rpt, "machine GUID is my own", RRDPUSH_STATUS_LOCALHOST, NDLP_DEBUG); char initial_response[HTTP_HEADER_SIZE + 1]; snprintfz(initial_response, HTTP_HEADER_SIZE, "%s", START_STREAMING_ERROR_SAME_LOCALHOST); if(send_timeout( #ifdef ENABLE_HTTPS &rpt->ssl, #endif rpt->fd, initial_response, strlen(initial_response), 0, 60) != (ssize_t)strlen(initial_response)) { nd_log_daemon(NDLP_ERR, "STREAM '%s' [receive from [%s]:%s]: " "failed to reply." , rpt->hostname , rpt->client_ip, rpt->client_port ); } receiver_state_free(rpt); return HTTP_RESP_OK; } if(unlikely(web_client_streaming_rate_t > 0)) { static SPINLOCK spinlock = NETDATA_SPINLOCK_INITIALIZER; static time_t last_stream_accepted_t = 0; time_t now = now_realtime_sec(); spinlock_lock(&spinlock); if(unlikely(last_stream_accepted_t == 0)) last_stream_accepted_t = now; if(now - last_stream_accepted_t < web_client_streaming_rate_t) { spinlock_unlock(&spinlock); char msg[100 + 1]; snprintfz(msg, sizeof(msg) - 1, "rate limit, will accept new connection in %ld secs", (long)(web_client_streaming_rate_t - (now - last_stream_accepted_t))); rrdpush_receive_log_status( rpt, msg, RRDPUSH_STATUS_RATE_LIMIT, NDLP_NOTICE); receiver_state_free(rpt); return rrdpush_receiver_too_busy_now(w); } last_stream_accepted_t = now; spinlock_unlock(&spinlock); } /* * Quick path for rejecting multiple connections. The lock taken is fine-grained - it only protects the receiver * pointer within the host (if a host exists). This protects against multiple concurrent web requests hitting * separate threads within the web-server and landing here. The lock guards the thread-shutdown sequence that * detaches the receiver from the host. If the host is being created (first time-access) then we also use the * lock to prevent race-hazard (two threads try to create the host concurrently, one wins and the other does a * lookup to the now-attached structure). */ { time_t age = 0; bool receiver_stale = false; bool receiver_working = false; rrd_rdlock(); RRDHOST *host = rrdhost_find_by_guid(rpt->machine_guid); if (unlikely(host && rrdhost_flag_check(host, RRDHOST_FLAG_ARCHIVED))) /* Ignore archived hosts. */ host = NULL; if (host) { netdata_mutex_lock(&host->receiver_lock); if (host->receiver) { age = now_monotonic_sec() - host->receiver->last_msg_t; if (age < 30) receiver_working = true; else receiver_stale = true; } netdata_mutex_unlock(&host->receiver_lock); } rrd_unlock(); if (receiver_stale && stop_streaming_receiver(host, STREAM_HANDSHAKE_DISCONNECT_STALE_RECEIVER)) { // we stopped the receiver // we can proceed with this connection receiver_stale = false; nd_log_daemon(NDLP_NOTICE, "STREAM '%s' [receive from [%s]:%s]: " "stopped previous stale receiver to accept this one." , rpt->hostname , rpt->client_ip, rpt->client_port ); } if (receiver_working || receiver_stale) { // another receiver is already connected // try again later char msg[200 + 1]; snprintfz(msg, sizeof(msg) - 1, "multiple connections for same host, " "old connection was last used %ld secs ago%s", age, receiver_stale ? " (signaled old receiver to stop)" : " (new connection not accepted)"); rrdpush_receive_log_status( rpt, msg, RRDPUSH_STATUS_ALREADY_CONNECTED, NDLP_DEBUG); // Have not set WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET - caller should clean up buffer_flush(w->response.data); buffer_strcat(w->response.data, START_STREAMING_ERROR_ALREADY_STREAMING); receiver_state_free(rpt); return HTTP_RESP_CONFLICT; } } rrdpush_receiver_takeover_web_connection(w, rpt); char tag[NETDATA_THREAD_TAG_MAX + 1]; snprintfz(tag, NETDATA_THREAD_TAG_MAX, THREAD_TAG_STREAM_RECEIVER "[%s]", rpt->hostname); tag[NETDATA_THREAD_TAG_MAX] = '\0'; if(netdata_thread_create(&rpt->thread, tag, NETDATA_THREAD_OPTION_DEFAULT, rrdpush_receiver_thread, (void *)rpt)) { rrdpush_receive_log_status( rpt, "can't create receiver thread", RRDPUSH_STATUS_INTERNAL_SERVER_ERROR, NDLP_ERR); buffer_flush(w->response.data); buffer_strcat(w->response.data, "Can't handle this request"); receiver_state_free(rpt); return HTTP_RESP_INTERNAL_SERVER_ERROR; } // prevent the caller from closing the streaming socket return HTTP_RESP_OK; } void rrdpush_reset_destinations_postpone_time(RRDHOST *host) { uint32_t wait = (host->sender) ? host->sender->reconnect_delay : 5; time_t now = now_realtime_sec(); for (struct rrdpush_destinations *d = host->destinations; d; d = d->next) d->postpone_reconnection_until = now + wait; } static struct { STREAM_HANDSHAKE err; const char *str; } handshake_errors[] = { { STREAM_HANDSHAKE_OK_V3, "CONNECTED" }, { STREAM_HANDSHAKE_OK_V2, "CONNECTED" }, { STREAM_HANDSHAKE_OK_V1, "CONNECTED" }, { STREAM_HANDSHAKE_NEVER, "" }, { STREAM_HANDSHAKE_ERROR_BAD_HANDSHAKE, "BAD HANDSHAKE" }, { STREAM_HANDSHAKE_ERROR_LOCALHOST, "LOCALHOST" }, { STREAM_HANDSHAKE_ERROR_ALREADY_CONNECTED, "ALREADY CONNECTED" }, { STREAM_HANDSHAKE_ERROR_DENIED, "DENIED" }, { STREAM_HANDSHAKE_ERROR_SEND_TIMEOUT, "SEND TIMEOUT" }, { STREAM_HANDSHAKE_ERROR_RECEIVE_TIMEOUT, "RECEIVE TIMEOUT" }, { STREAM_HANDSHAKE_ERROR_INVALID_CERTIFICATE, "INVALID CERTIFICATE" }, { STREAM_HANDSHAKE_ERROR_SSL_ERROR, "SSL ERROR" }, { STREAM_HANDSHAKE_ERROR_CANT_CONNECT, "CANT CONNECT" }, { STREAM_HANDSHAKE_BUSY_TRY_LATER, "BUSY TRY LATER" }, { STREAM_HANDSHAKE_INTERNAL_ERROR, "INTERNAL ERROR" }, { STREAM_HANDSHAKE_INITIALIZATION, "REMOTE IS INITIALIZING" }, { STREAM_HANDSHAKE_DISCONNECT_HOST_CLEANUP, "DISCONNECTED HOST CLEANUP" }, { STREAM_HANDSHAKE_DISCONNECT_STALE_RECEIVER, "DISCONNECTED STALE RECEIVER" }, { STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN, "DISCONNECTED SHUTDOWN REQUESTED" }, { STREAM_HANDSHAKE_DISCONNECT_NETDATA_EXIT, "DISCONNECTED NETDATA EXIT" }, { STREAM_HANDSHAKE_DISCONNECT_PARSER_EXIT, "DISCONNECTED PARSE ENDED" }, {STREAM_HANDSHAKE_DISCONNECT_UNKNOWN_SOCKET_READ_ERROR, "DISCONNECTED UNKNOWN SOCKET READ ERROR" }, { STREAM_HANDSHAKE_DISCONNECT_PARSER_FAILED, "DISCONNECTED PARSE ERROR" }, { STREAM_HANDSHAKE_DISCONNECT_RECEIVER_LEFT, "DISCONNECTED RECEIVER LEFT" }, { STREAM_HANDSHAKE_DISCONNECT_ORPHAN_HOST, "DISCONNECTED ORPHAN HOST" }, { STREAM_HANDSHAKE_NON_STREAMABLE_HOST, "NON STREAMABLE HOST" }, { STREAM_HANDSHAKE_DISCONNECT_NOT_SUFFICIENT_READ_BUFFER, "DISCONNECTED NOT SUFFICIENT READ BUFFER" }, {STREAM_HANDSHAKE_DISCONNECT_SOCKET_EOF, "DISCONNECTED SOCKET EOF" }, {STREAM_HANDSHAKE_DISCONNECT_SOCKET_READ_FAILED, "DISCONNECTED SOCKET READ FAILED" }, {STREAM_HANDSHAKE_DISCONNECT_SOCKET_READ_TIMEOUT, "DISCONNECTED SOCKET READ TIMEOUT" }, { 0, NULL }, }; const char *stream_handshake_error_to_string(STREAM_HANDSHAKE handshake_error) { if(handshake_error >= STREAM_HANDSHAKE_OK_V1) // handshake_error is the whole version / capabilities number return "CONNECTED"; for(size_t i = 0; handshake_errors[i].str ; i++) { if(handshake_error == handshake_errors[i].err) return handshake_errors[i].str; } return "UNKNOWN"; } static struct { STREAM_CAPABILITIES cap; const char *str; } capability_names[] = { {STREAM_CAP_V1, "V1" }, {STREAM_CAP_V2, "V2" }, {STREAM_CAP_VN, "VN" }, {STREAM_CAP_VCAPS, "VCAPS" }, {STREAM_CAP_HLABELS, "HLABELS" }, {STREAM_CAP_CLAIM, "CLAIM" }, {STREAM_CAP_CLABELS, "CLABELS" }, {STREAM_CAP_LZ4, "LZ4" }, {STREAM_CAP_FUNCTIONS, "FUNCTIONS" }, {STREAM_CAP_REPLICATION, "REPLICATION" }, {STREAM_CAP_BINARY, "BINARY" }, {STREAM_CAP_INTERPOLATED, "INTERPOLATED" }, {STREAM_CAP_IEEE754, "IEEE754" }, {STREAM_CAP_DATA_WITH_ML, "ML" }, {STREAM_CAP_DYNCFG, "DYNCFG" }, {STREAM_CAP_SLOTS, "SLOTS" }, {STREAM_CAP_ZSTD, "ZSTD" }, {STREAM_CAP_GZIP, "GZIP" }, {STREAM_CAP_BROTLI, "BROTLI" }, {0 , NULL }, }; void stream_capabilities_to_string(BUFFER *wb, STREAM_CAPABILITIES caps) { for(size_t i = 0; capability_names[i].str ; i++) { if(caps & capability_names[i].cap) { buffer_strcat(wb, capability_names[i].str); buffer_strcat(wb, " "); } } } void stream_capabilities_to_json_array(BUFFER *wb, STREAM_CAPABILITIES caps, const char *key) { if(key) buffer_json_member_add_array(wb, key); else buffer_json_add_array_item_array(wb); for(size_t i = 0; capability_names[i].str ; i++) { if(caps & capability_names[i].cap) buffer_json_add_array_item_string(wb, capability_names[i].str); } buffer_json_array_close(wb); } void log_receiver_capabilities(struct receiver_state *rpt) { BUFFER *wb = buffer_create(100, NULL); stream_capabilities_to_string(wb, rpt->capabilities); nd_log_daemon(NDLP_INFO, "STREAM %s [receive from [%s]:%s]: established link with negotiated capabilities: %s", rrdhost_hostname(rpt->host), rpt->client_ip, rpt->client_port, buffer_tostring(wb)); buffer_free(wb); } void log_sender_capabilities(struct sender_state *s) { BUFFER *wb = buffer_create(100, NULL); stream_capabilities_to_string(wb, s->capabilities); nd_log_daemon(NDLP_INFO, "STREAM %s [send to %s]: established link with negotiated capabilities: %s", rrdhost_hostname(s->host), s->connected_to, buffer_tostring(wb)); buffer_free(wb); } STREAM_CAPABILITIES stream_our_capabilities(RRDHOST *host, bool sender) { STREAM_CAPABILITIES disabled_capabilities = globally_disabled_capabilities; if(host && sender) { // we have DATA_WITH_ML capability // we should remove the DATA_WITH_ML capability if our database does not have anomaly info // this can happen under these conditions: 1. we don't run ML, and 2. we don't receive ML netdata_mutex_lock(&host->receiver_lock); if(!ml_host_running(host) && !stream_has_capability(host->receiver, STREAM_CAP_DATA_WITH_ML)) disabled_capabilities |= STREAM_CAP_DATA_WITH_ML; netdata_mutex_unlock(&host->receiver_lock); if(host->sender) disabled_capabilities |= host->sender->disabled_capabilities; } return (STREAM_CAP_V1 | STREAM_CAP_V2 | STREAM_CAP_VN | STREAM_CAP_VCAPS | STREAM_CAP_HLABELS | STREAM_CAP_CLAIM | STREAM_CAP_CLABELS | STREAM_CAP_FUNCTIONS | STREAM_CAP_REPLICATION | STREAM_CAP_BINARY | STREAM_CAP_INTERPOLATED | STREAM_CAP_SLOTS | STREAM_CAP_COMPRESSIONS_AVAILABLE | #ifdef NETDATA_TEST_DYNCFG STREAM_CAP_DYNCFG | #endif STREAM_CAP_IEEE754 | STREAM_CAP_DATA_WITH_ML | 0) & ~disabled_capabilities; } STREAM_CAPABILITIES convert_stream_version_to_capabilities(int32_t version, RRDHOST *host, bool sender) { STREAM_CAPABILITIES caps = 0; if(version <= 1) caps = STREAM_CAP_V1; else if(version < STREAM_OLD_VERSION_CLAIM) caps = STREAM_CAP_V2 | STREAM_CAP_HLABELS; else if(version <= STREAM_OLD_VERSION_CLAIM) caps = STREAM_CAP_VN | STREAM_CAP_HLABELS | STREAM_CAP_CLAIM; else if(version <= STREAM_OLD_VERSION_CLABELS) caps = STREAM_CAP_VN | STREAM_CAP_HLABELS | STREAM_CAP_CLAIM | STREAM_CAP_CLABELS; else if(version <= STREAM_OLD_VERSION_LZ4) caps = STREAM_CAP_VN | STREAM_CAP_HLABELS | STREAM_CAP_CLAIM | STREAM_CAP_CLABELS | STREAM_CAP_LZ4_AVAILABLE; else caps = version; if(caps & STREAM_CAP_VCAPS) caps &= ~(STREAM_CAP_V1|STREAM_CAP_V2|STREAM_CAP_VN); if(caps & STREAM_CAP_VN) caps &= ~(STREAM_CAP_V1|STREAM_CAP_V2); if(caps & STREAM_CAP_V2) caps &= ~(STREAM_CAP_V1); STREAM_CAPABILITIES common_caps = caps & stream_our_capabilities(host, sender); if(!(common_caps & STREAM_CAP_INTERPOLATED)) // DATA WITH ML requires INTERPOLATED common_caps &= ~STREAM_CAP_DATA_WITH_ML; return common_caps; } int32_t stream_capabilities_to_vn(uint32_t caps) { if(caps & STREAM_CAP_LZ4) return STREAM_OLD_VERSION_LZ4; if(caps & STREAM_CAP_CLABELS) return STREAM_OLD_VERSION_CLABELS; return STREAM_OLD_VERSION_CLAIM; // if(caps & STREAM_CAP_CLAIM) }