diff options
Diffstat (limited to 'src/streaming/rrdpush.c')
| -rw-r--r-- | src/streaming/rrdpush.c | 1412 |
1 files changed, 1412 insertions, 0 deletions
diff --git a/src/streaming/rrdpush.c b/src/streaming/rrdpush.c new file mode 100644 index 000000000..874d4eb2f --- /dev/null +++ b/src/streaming/rrdpush.c @@ -0,0 +1,1412 @@ +// 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, PLUGINSD_KEYWORD_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, PLUGINSD_KEYWORD_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_chart_functions_expose_rrdpush(st, wb); + + // send the chart local custom variables + rrdvar_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)) + rrdvar_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)) + rrdvar_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, }; +} + +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_global_functions_expose_rrdpush(host, wb, stream_has_capability(host->sender, STREAM_CAP_DYNCFG)); + 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_global_functions_expose_rrdpush(host, wb, stream_has_capability(host->sender, STREAM_CAP_DYNCFG)); + + sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS); + + 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, "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" }, + {STREAM_CAP_PROGRESS, "PROGRESS" }, + {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_PROGRESS | + STREAM_CAP_COMPRESSIONS_AVAILABLE | + STREAM_CAP_DYNCFG | + 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) +} |