diff options
Diffstat (limited to 'streaming/rrdpush.c')
| -rw-r--r-- | streaming/rrdpush.c | 1044 |
1 files changed, 1044 insertions, 0 deletions
diff --git a/streaming/rrdpush.c b/streaming/rrdpush.c new file mode 100644 index 0000000..a57f1b0 --- /dev/null +++ b/streaming/rrdpush.c @@ -0,0 +1,1044 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "rrdpush.h" +#include "parser/parser.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; +#ifdef ENABLE_COMPRESSION +unsigned int default_compression_enabled = 1; +#endif +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 +int netdata_use_ssl_on_stream = NETDATA_SSL_OPTIONAL; +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)) { + info("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)) + info("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 = config_get_number(CONFIG_SECTION_DB, "cleanup orphan hosts after secs", rrdhost_free_orphan_time); + +#ifdef ENABLE_COMPRESSION + default_compression_enabled = (unsigned int)appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, + "enable compression", default_compression_enabled); +#endif + + if(default_rrdpush_enabled && (!default_rrdpush_destination || !*default_rrdpush_destination || !default_rrdpush_api_key || !*default_rrdpush_api_key)) { + error("STREAM [send]: cannot enable sending thread - information is missing."); + default_rrdpush_enabled = 0; + } + +#ifdef ENABLE_HTTPS + if (netdata_use_ssl_on_stream == NETDATA_SSL_OPTIONAL) { + if (default_rrdpush_destination){ + char *test = strstr(default_rrdpush_destination,":SSL"); + if(test){ + *test = 0X00; + netdata_use_ssl_on_stream = NETDATA_SSL_FORCE; + } + } + } + + bool invalid_certificate = appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "ssl skip certificate verification", CONFIG_BOOLEAN_NO); + + if(invalid_certificate == CONFIG_BOOLEAN_YES){ + if(netdata_ssl_validate_server == NETDATA_SSL_VALID_CERTIFICATE){ + info("Netdata is configured to accept invalid SSL certificate."); + netdata_ssl_validate_server = NETDATA_SSL_INVALID_CERTIFICATE; + } + } + + 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(host->rrdpush_send_charts_matching, rrdset_id(st)) || + simple_pattern_matches(host->rrdpush_send_charts_matching, rrdset_name(st))) + + 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); + 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) { + bool replication_progress = false; + + RRDHOST *host = st->rrdhost; + + rrdset_flag_set(st, RRDSET_FLAG_UPSTREAM_EXPOSED); + + // 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 = ""; + } + } + + // send the chart + buffer_sprintf( + wb + , "CHART \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" \"%s\" %ld %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_sprintf( + wb + , "DIMENSION \"%s\" \"%s\" \"%s\" " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " \"%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":"" + ); + rd->exposed = 1; + } + 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 first_entry_local = rrdset_first_entry_t_of_tier(st, 0); + time_t last_entry_local = st->last_updated.tv_sec; + + if(unlikely(!last_entry_local)) + last_entry_local = rrdset_last_entry_t(st); + + time_t now = now_realtime_sec(); + if(unlikely(last_entry_local > now)) { + internal_error(true, + "RRDSET REPLAY ERROR: 'host:%s/chart:%s' last updated time %ld is in the future, adjusting it to now %ld", + rrdhost_hostname(st->rrdhost), rrdset_id(st), + last_entry_local, now); + last_entry_local = now; + } + + if(unlikely(first_entry_local && last_entry_local && first_entry_local >= last_entry_local)) { + internal_error(true, + "RRDSET REPLAY ERROR: 'host:%s/chart:%s' first updated time %ld is equal or bigger than last updated time %ld, adjusting it last updated time - update every", + rrdhost_hostname(st->rrdhost), rrdset_id(st), + first_entry_local, last_entry_local); + first_entry_local = last_entry_local - st->update_every; + } + + if(unlikely(!first_entry_local && last_entry_local)) { + internal_error(true, + "RRDSET REPLAY ERROR: 'host:%s/chart:%s' first time %ld, last time %ld, setting both to last time", + rrdhost_hostname(st->rrdhost), rrdset_id(st), + first_entry_local, last_entry_local); + first_entry_local = last_entry_local; + } + + buffer_sprintf(wb, PLUGINSD_KEYWORD_CHART_DEFINITION_END " %llu %llu %llu\n", + (unsigned long long)first_entry_local, + (unsigned long long)last_entry_local, + (unsigned long long)now); + + 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 + } + + st->upstream_resync_time = 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, 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(stream_has_capability(s, STREAM_CAP_REPLICATION) || st->last_collected_time.tv_sec > st->upstream_resync_time) + buffer_print_llu(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(!rd->updated)) + continue; + + if(likely(rd->exposed)) { + buffer_fast_strcat(wb, "SET \"", 5); + buffer_fast_strcat(wb, rrddim_id(rd), string_strlen(rd->id)); + buffer_fast_strcat(wb, "\" = ", 4); + buffer_print_ll(wb, rd->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 + rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED); + } + } + 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, __atomic_load_n(&st->flags, __ATOMIC_SEQ_CST)))) + return false; + + BUFFER *wb = sender_start(host->sender); + rrdpush_send_chart_definition(wb, st); + sender_commit(host->sender, wb); + + return true; +} + +void rrdset_done_push(RRDSET *st) { + 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); + error("STREAM %s [send]: not ready - collected metrics are not sent to parent.", rrdhost_hostname(host)); + } + + return; + } + else if(unlikely(host_flags & RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS)) { + info("STREAM %s [send]: sending metrics to parent...", rrdhost_hostname(host)); + rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_LOGGED_STATUS); + } + + RRDSET_FLAGS rrdset_flags = __atomic_load_n(&st->flags, __ATOMIC_SEQ_CST); + bool exposed_upstream = (rrdset_flags & RRDSET_FLAG_UPSTREAM_EXPOSED); + 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; + + BUFFER *wb = sender_start(host->sender); + + if(unlikely(!exposed_upstream)) + replication_in_progress = rrdpush_send_chart_definition(wb, st); + + if (likely(!replication_in_progress)) + rrdpush_send_chart_metrics(wb, st, host->sender, rrdset_flags); + + sender_commit(host->sender, wb); +} + +// 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); +} + +void rrdpush_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); +} + +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) { + info( + "STREAM %s: skipping destination '%s' (default port: %d) due to last error (code: %d, %s), will retry it in %d seconds", + rrdhost_hostname(host), + string2str(d->destination), + default_port, + d->last_handshake, d->last_error?d->last_error:"unset reason description", + (int)(d->postpone_reconnection_until - now)); + + continue; + } + + info( + "STREAM %s: attempting to connect to '%s' (default port: %d)...", + rrdhost_hostname(host), + string2str(d->destination), + default_port); + + if (reconnects_counter) + *reconnects_counter += 1; + + 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_UNSAFE(host->destinations, d, prev, next); + DOUBLE_LINKED_LIST_APPEND_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)); + d->destination = string_strdupz(entry); + + DOUBLE_LINKED_LIST_APPEND_UNSAFE(t->list, d, prev, next); + + t->count++; + 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_UNSAFE(host->destinations, tmp, prev, next); + string_freez(tmp->destination); + freez(tmp); + } + + 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) { + + if (!host->sender) + return; + + netdata_mutex_lock(&host->sender->mutex); + netdata_thread_t thr = 0; + + if(rrdhost_flag_check(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN)) { + rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN); + + info("STREAM %s [send]: signaling sending thread to stop...", rrdhost_hostname(host)); + + // signal the thread that we want to join it + rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_JOIN); + + // copy the thread id, so that we will be waiting for the right one + // even if a new one has been spawn + thr = host->rrdpush_sender_thread; + + // signal it to cancel + netdata_thread_cancel(host->rrdpush_sender_thread); + } + + netdata_mutex_unlock(&host->sender->mutex); + + if(thr != 0) { + info("STREAM %s [send]: waiting for the sending thread to stop...", rrdhost_hostname(host)); + void *result; + netdata_thread_join(thr, &result); + info("STREAM %s [send]: sending thread has exited.", rrdhost_hostname(host)); + } +} + + +// ---------------------------------------------------------------------------- +// rrdpush receiver thread + +void log_stream_connection(const char *client_ip, const char *client_port, const char *api_key, const char *machine_guid, const char *host, const char *msg) { + log_access("STREAM: %d '[%s]:%s' '%s' host '%s' api key '%s' machine guid '%s'", gettid(), client_ip, client_port, msg, host, api_key, machine_guid); +} + + +static void rrdpush_sender_thread_spawn(RRDHOST *host) { + netdata_mutex_lock(&host->sender->mutex); + + if(!rrdhost_flag_check(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN)) { + char tag[NETDATA_THREAD_TAG_MAX + 1]; + snprintfz(tag, NETDATA_THREAD_TAG_MAX, "STREAM_SENDER[%s]", rrdhost_hostname(host)); + + if(netdata_thread_create(&host->rrdpush_sender_thread, tag, NETDATA_THREAD_OPTION_JOINABLE, rrdpush_sender_thread, (void *) host->sender)) + error("STREAM %s [send]: failed to create new thread for client.", rrdhost_hostname(host)); + else + rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN); + } + + netdata_mutex_unlock(&host->sender->mutex); +} + +int rrdpush_receiver_permission_denied(struct web_client *w) { + // we always respond with the same message and error code + // to prevent an attacker from gaining info about the error + buffer_flush(w->response.data); + buffer_sprintf(w->response.data, "You are not permitted to access this. Check the logs for more info."); + return 401; +} + +int rrdpush_receiver_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_sprintf(w->response.data, "The server is too busy now to accept this request. Try later."); + return 503; +} + +void *rrdpush_receiver_thread(void *ptr); +int rrdpush_receiver_thread_spawn(struct web_client *w, char *url) { + info("clients wants to STREAM metrics."); + + char *key = NULL, *hostname = NULL, *registry_hostname = NULL, *machine_guid = NULL, *os = "unknown", *timezone = "unknown", *abbrev_timezone = "UTC", *tags = NULL; + int32_t utc_offset = 0; + int update_every = default_rrd_update_every; + uint32_t stream_version = UINT_MAX; + char buf[GUID_LEN + 1]; + + struct rrdhost_system_info *system_info = callocz(1, sizeof(struct rrdhost_system_info)); + system_info->hops = 1; + while(url) { + char *value = mystrsep(&url, "&"); + if(!value || !*value) continue; + + char *name = mystrsep(&value, "="); + if(!name || !*name) continue; + if(!value || !*value) continue; + + if(!strcmp(name, "key")) + key = value; + else if(!strcmp(name, "hostname")) + hostname = value; + else if(!strcmp(name, "registry_hostname")) + registry_hostname = value; + else if(!strcmp(name, "machine_guid")) + machine_guid = value; + else if(!strcmp(name, "update_every")) + update_every = (int)strtoul(value, NULL, 0); + else if(!strcmp(name, "os")) + os = value; + else if(!strcmp(name, "timezone")) + timezone = value; + else if(!strcmp(name, "abbrev_timezone")) + abbrev_timezone = value; + else if(!strcmp(name, "utc_offset")) + utc_offset = (int32_t)strtol(value, NULL, 0); + else if(!strcmp(name, "hops")) + system_info->hops = (uint16_t) strtoul(value, NULL, 0); + else if(!strcmp(name, "ml_capable")) + system_info->ml_capable = strtoul(value, NULL, 0); + else if(!strcmp(name, "ml_enabled")) + system_info->ml_enabled = strtoul(value, NULL, 0); + else if(!strcmp(name, "mc_version")) + system_info->mc_version = strtoul(value, NULL, 0); + else if(!strcmp(name, "tags")) + tags = value; + else if(!strcmp(name, "ver")) + stream_version = convert_stream_version_to_capabilities(strtoul(value, NULL, 0)); + 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") && stream_version == UINT_MAX) { + stream_version = convert_stream_version_to_capabilities(1); + } + + if (unlikely(rrdhost_set_system_info_variable(system_info, name, value))) { + info("STREAM [receive from [%s]:%s]: request has parameter '%s' = '%s', which is not used.", + w->client_ip, w->client_port, name, value); + } + } + } + + if (stream_version == UINT_MAX) + stream_version = convert_stream_version_to_capabilities(0); + + if(!key || !*key) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO KEY"); + error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port); + return rrdpush_receiver_permission_denied(w); + } + + if(!hostname || !*hostname) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO HOSTNAME"); + error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port); + return rrdpush_receiver_permission_denied(w); + } + + if(!machine_guid || !*machine_guid) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - NO MACHINE GUID"); + error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port); + return rrdpush_receiver_permission_denied(w); + } + + if(regenerate_guid(key, buf) == -1) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - INVALID KEY"); + error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID (use the command uuidgen to generate one). Forbidding access.", w->client_ip, w->client_port, key); + return rrdpush_receiver_permission_denied(w); + } + + if(regenerate_guid(machine_guid, buf) == -1) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - INVALID MACHINE GUID"); + error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, machine_guid); + return rrdpush_receiver_permission_denied(w); + } + + const char *api_key_type = appconfig_get(&stream_config, key, "type", "api"); + if(!api_key_type || !*api_key_type) api_key_type = "unknown"; + if(strcmp(api_key_type, "api") != 0) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - API KEY GIVEN IS NOT API KEY"); + error("STREAM [receive from [%s]:%s]: API key '%s' is a %s GUID. Forbidding access.", w->client_ip, w->client_port, key, api_key_type); + return rrdpush_receiver_permission_denied(w); + } + + if(!appconfig_get_boolean(&stream_config, key, "enabled", 0)) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - KEY NOT ENABLED"); + error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, key); + return rrdpush_receiver_permission_denied(w); + } + + { + SIMPLE_PATTERN *key_allow_from = simple_pattern_create(appconfig_get(&stream_config, key, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT); + if(key_allow_from) { + if(!simple_pattern_matches(key_allow_from, w->client_ip)) { + simple_pattern_free(key_allow_from); + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - KEY NOT ALLOWED FROM THIS IP"); + error("STREAM [receive from [%s]:%s]: API key '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, key); + return rrdpush_receiver_permission_denied(w); + } + simple_pattern_free(key_allow_from); + } + } + + const char *machine_guid_type = appconfig_get(&stream_config, machine_guid, "type", "machine"); + if(!machine_guid_type || !*machine_guid_type) machine_guid_type = "unknown"; + if(strcmp(machine_guid_type, "machine") != 0) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID GIVEN IS NOT A MACHINE GUID"); + error("STREAM [receive from [%s]:%s]: machine GUID '%s' is a %s GUID. Forbidding access.", w->client_ip, w->client_port, machine_guid, machine_guid_type); + return rrdpush_receiver_permission_denied(w); + } + + if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) { + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID NOT ENABLED"); + error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid); + return rrdpush_receiver_permission_denied(w); + } + + { + SIMPLE_PATTERN *machine_allow_from = simple_pattern_create(appconfig_get(&stream_config, machine_guid, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT); + if(machine_allow_from) { + if(!simple_pattern_matches(machine_allow_from, w->client_ip)) { + simple_pattern_free(machine_allow_from); + rrdhost_system_info_free(system_info); + log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID NOT ALLOWED FROM THIS IP"); + error("STREAM [receive from [%s]:%s]: Machine GUID '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, machine_guid); + return rrdpush_receiver_permission_denied(w); + } + simple_pattern_free(machine_allow_from); + } + } + + if(unlikely(web_client_streaming_rate_t > 0)) { + static netdata_mutex_t stream_rate_mutex = NETDATA_MUTEX_INITIALIZER; + static volatile time_t last_stream_accepted_t = 0; + + netdata_mutex_lock(&stream_rate_mutex); + time_t now = now_realtime_sec(); + + if(unlikely(last_stream_accepted_t == 0)) + last_stream_accepted_t = now; + + if(now - last_stream_accepted_t < web_client_streaming_rate_t) { + netdata_mutex_unlock(&stream_rate_mutex); + rrdhost_system_info_free(system_info); + error("STREAM [receive from [%s]:%s]: too busy to accept new streaming request. Will be allowed in %ld secs.", w->client_ip, w->client_port, (long)(web_client_streaming_rate_t - (now - last_stream_accepted_t))); + return rrdpush_receiver_too_busy_now(w); + } + + last_stream_accepted_t = now; + netdata_mutex_unlock(&stream_rate_mutex); + } + + /* + * 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). + */ + struct receiver_state *rpt = callocz(1, sizeof(*rpt)); + + rrd_rdlock(); + RRDHOST *host = rrdhost_find_by_guid(machine_guid); + if (unlikely(host && rrdhost_flag_check(host, RRDHOST_FLAG_ARCHIVED))) /* Ignore archived hosts. */ + host = NULL; + if (host) { + rrdhost_wrlock(host); + netdata_mutex_lock(&host->receiver_lock); + rrdhost_flag_clear(host, RRDHOST_FLAG_ORPHAN); + host->senders_disconnected_time = 0; + if (host->receiver != NULL) { + time_t age = now_realtime_sec() - host->receiver->last_msg_t; + if (age > 30) { + host->receiver->shutdown = 1; + shutdown(host->receiver->fd, SHUT_RDWR); + host->receiver = NULL; // Thread holds reference to structure + info( + "STREAM %s [receive from [%s]:%s]: multiple connections for same host detected - " + "existing connection is dead (%"PRId64" sec), accepting new connection.", + rrdhost_hostname(host), + w->client_ip, + w->client_port, + (int64_t)age); + } + else { + netdata_mutex_unlock(&host->receiver_lock); + rrdhost_unlock(host); + rrd_unlock(); + log_stream_connection(w->client_ip, w->client_port, key, host->machine_guid, rrdhost_hostname(host), + "REJECTED - ALREADY CONNECTED"); + info( + "STREAM %s [receive from [%s]:%s]: multiple connections for same host detected - " + "existing connection is active (within last %"PRId64" sec), rejecting new connection.", + rrdhost_hostname(host), + w->client_ip, + w->client_port, + (int64_t)age); + // Have not set WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET - caller should clean up + buffer_flush(w->response.data); + buffer_strcat(w->response.data, "This GUID is already streaming to this server"); + freez(rpt); + return 409; + } + } + host->receiver = rpt; + netdata_mutex_unlock(&host->receiver_lock); + rrdhost_unlock(host); + } + rrd_unlock(); + + rpt->last_msg_t = now_realtime_sec(); + + rpt->host = host; + rpt->fd = w->ifd; + rpt->key = strdupz(key); + rpt->hostname = strdupz(hostname); + rpt->registry_hostname = strdupz((registry_hostname && *registry_hostname)?registry_hostname:hostname); + rpt->machine_guid = strdupz(machine_guid); + rpt->os = strdupz(os); + rpt->timezone = strdupz(timezone); + rpt->abbrev_timezone = strdupz(abbrev_timezone); + rpt->utc_offset = utc_offset; + rpt->tags = (tags)?strdupz(tags):NULL; + rpt->client_ip = strdupz(w->client_ip); + rpt->client_port = strdupz(w->client_port); + rpt->update_every = update_every; + rpt->system_info = system_info; + rpt->capabilities = stream_version; +#ifdef ENABLE_HTTPS + rpt->ssl.conn = w->ssl.conn; + rpt->ssl.flags = w->ssl.flags; + + w->ssl.conn = NULL; + w->ssl.flags = NETDATA_SSL_START; +#endif + + 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); + } + + + + debug(D_SYSTEM, "starting STREAM receive thread."); + + char tag[FILENAME_MAX + 1]; + snprintfz(tag, FILENAME_MAX, "STREAM_RECEIVER[%s,[%s]:%s]", rpt->hostname, w->client_ip, w->client_port); + + if(netdata_thread_create(&rpt->thread, tag, NETDATA_THREAD_OPTION_DEFAULT, rrdpush_receiver_thread, (void *)rpt)) + error("Failed to create new STREAM receive thread for client."); + + // prevent the caller from closing the streaming socket + if(web_server_mode == WEB_SERVER_MODE_STATIC_THREADED) { + web_client_flag_set(w, WEB_CLIENT_FLAG_DONT_CLOSE_SOCKET); + } + else { + if(w->ifd == w->ofd) + w->ifd = w->ofd = -1; + else + w->ifd = -1; + } + + buffer_flush(w->response.data); + return 200; +} + +static void stream_capabilities_to_string(BUFFER *wb, STREAM_CAPABILITIES caps) { + if(caps & STREAM_CAP_V1) buffer_strcat(wb, "V1 "); + if(caps & STREAM_CAP_V2) buffer_strcat(wb, "V2 "); + if(caps & STREAM_CAP_VN) buffer_strcat(wb, "VN "); + if(caps & STREAM_CAP_VCAPS) buffer_strcat(wb, "VCAPS "); + if(caps & STREAM_CAP_HLABELS) buffer_strcat(wb, "HLABELS "); + if(caps & STREAM_CAP_CLAIM) buffer_strcat(wb, "CLAIM "); + if(caps & STREAM_CAP_CLABELS) buffer_strcat(wb, "CLABELS "); + if(caps & STREAM_CAP_COMPRESSION) buffer_strcat(wb, "COMPRESSION "); + if(caps & STREAM_CAP_FUNCTIONS) buffer_strcat(wb, "FUNCTIONS "); + if(caps & STREAM_CAP_REPLICATION) buffer_strcat(wb, "REPLICATION "); + if(caps & STREAM_CAP_BINARY) buffer_strcat(wb, "BINARY "); +} + +void log_receiver_capabilities(struct receiver_state *rpt) { + BUFFER *wb = buffer_create(100); + stream_capabilities_to_string(wb, rpt->capabilities); + + 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); + stream_capabilities_to_string(wb, s->capabilities); + + 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 convert_stream_version_to_capabilities(int32_t version) { + 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_COMPRESSION) caps = STREAM_CAP_VN | STREAM_CAP_HLABELS | STREAM_CAP_CLAIM | STREAM_CAP_CLABELS | STREAM_HAS_COMPRESSION; + 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); + + return caps & STREAM_OUR_CAPABILITIES; +} + +int32_t stream_capabilities_to_vn(uint32_t caps) { + if(caps & STREAM_CAP_COMPRESSION) return STREAM_OLD_VERSION_COMPRESSION; + if(caps & STREAM_CAP_CLABELS) return STREAM_OLD_VERSION_CLABELS; + return STREAM_OLD_VERSION_CLAIM; // if(caps & STREAM_CAP_CLAIM) +} + |