src/streaming/receiver.c
// SPDX-License-Identifier: GPL-3.0-or-later
#include "rrdpush.h"
#include "web/server/h2o/http_server.h"
extern struct config stream_config;
void receiver_state_free(struct receiver_state *rpt) {
freez(rpt->key);
freez(rpt->hostname);
freez(rpt->registry_hostname);
freez(rpt->machine_guid);
freez(rpt->os);
freez(rpt->timezone);
freez(rpt->abbrev_timezone);
freez(rpt->client_ip);
freez(rpt->client_port);
freez(rpt->program_name);
freez(rpt->program_version);
#ifdef ENABLE_HTTPS
netdata_ssl_close(&rpt->ssl);
#endif
if(rpt->fd != -1) {
internal_error(true, "closing socket...");
close(rpt->fd);
}
rrdpush_decompressor_destroy(&rpt->decompressor);
if(rpt->system_info)
rrdhost_system_info_free(rpt->system_info);
__atomic_sub_fetch(&netdata_buffers_statistics.rrdhost_receivers, sizeof(*rpt), __ATOMIC_RELAXED);
freez(rpt);
}
#include "collectors/plugins.d/pluginsd_parser.h"
// IMPORTANT: to add workers, you have to edit WORKER_PARSER_FIRST_JOB accordingly
#define WORKER_RECEIVER_JOB_BYTES_READ (WORKER_PARSER_FIRST_JOB - 1)
#define WORKER_RECEIVER_JOB_BYTES_UNCOMPRESSED (WORKER_PARSER_FIRST_JOB - 2)
// this has to be the same at parser.h
#define WORKER_RECEIVER_JOB_REPLICATION_COMPLETION (WORKER_PARSER_FIRST_JOB - 3)
#if WORKER_PARSER_FIRST_JOB < 1
#error The define WORKER_PARSER_FIRST_JOB needs to be at least 1
#endif
static inline int read_stream(struct receiver_state *r, char* buffer, size_t size) {
if(unlikely(!size)) {
internal_error(true, "%s() asked to read zero bytes", __FUNCTION__);
return 0;
}
#ifdef ENABLE_H2O
if (is_h2o_rrdpush(r)) {
if(nd_thread_signaled_to_cancel())
return -4;
return (int)h2o_stream_read(r->h2o_ctx, buffer, size);
}
#endif
int tries = 100;
ssize_t bytes_read;
do {
errno = 0;
switch(wait_on_socket_or_cancel_with_timeout(
#ifdef ENABLE_HTTPS
&r->ssl,
#endif
r->fd, 0, POLLIN, NULL))
{
case 0: // data are waiting
break;
case 1: // timeout reached
netdata_log_error("STREAM: %s(): timeout while waiting for data on socket!", __FUNCTION__);
return -3;
case -1: // thread cancelled
netdata_log_error("STREAM: %s(): thread has been cancelled timeout while waiting for data on socket!", __FUNCTION__);
return -4;
default:
case 2: // error on socket
netdata_log_error("STREAM: %s() socket error!", __FUNCTION__);
return -2;
}
#ifdef ENABLE_HTTPS
if (SSL_connection(&r->ssl))
bytes_read = netdata_ssl_read(&r->ssl, buffer, size);
else
bytes_read = read(r->fd, buffer, size);
#else
bytes_read = read(r->fd, buffer, size);
#endif
} while(bytes_read < 0 && errno == EINTR && tries--);
if((bytes_read == 0 || bytes_read == -1) && (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINPROGRESS)) {
netdata_log_error("STREAM: %s(): timeout while waiting for data on socket!", __FUNCTION__);
bytes_read = -3;
}
else if (bytes_read == 0) {
netdata_log_error("STREAM: %s(): EOF while reading data from socket!", __FUNCTION__);
bytes_read = -1;
}
else if (bytes_read < 0) {
netdata_log_error("STREAM: %s() failed to read from socket!", __FUNCTION__);
bytes_read = -2;
}
return (int)bytes_read;
}
static inline STREAM_HANDSHAKE read_stream_error_to_reason(int code) {
if(code > 0)
return 0;
switch(code) {
case 0:
// asked to read zero bytes
return STREAM_HANDSHAKE_DISCONNECT_NOT_SUFFICIENT_READ_BUFFER;
case -1:
// EOF
return STREAM_HANDSHAKE_DISCONNECT_SOCKET_EOF;
case -2:
// failed to read
return STREAM_HANDSHAKE_DISCONNECT_SOCKET_READ_FAILED;
case -3:
// timeout
return STREAM_HANDSHAKE_DISCONNECT_SOCKET_READ_TIMEOUT;
case -4:
// the thread is cancelled
return STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN;
default:
// anything else
return STREAM_HANDSHAKE_DISCONNECT_UNKNOWN_SOCKET_READ_ERROR;
}
}
static inline bool receiver_read_uncompressed(struct receiver_state *r, STREAM_HANDSHAKE *reason) {
#ifdef NETDATA_INTERNAL_CHECKS
if(r->reader.read_buffer[r->reader.read_len] != '\0')
fatal("%s(): read_buffer does not start with zero", __FUNCTION__ );
#endif
int bytes_read = read_stream(r, r->reader.read_buffer + r->reader.read_len, sizeof(r->reader.read_buffer) - r->reader.read_len - 1);
if(unlikely(bytes_read <= 0)) {
*reason = read_stream_error_to_reason(bytes_read);
return false;
}
worker_set_metric(WORKER_RECEIVER_JOB_BYTES_READ, (NETDATA_DOUBLE)bytes_read);
worker_set_metric(WORKER_RECEIVER_JOB_BYTES_UNCOMPRESSED, (NETDATA_DOUBLE)bytes_read);
r->reader.read_len += bytes_read;
r->reader.read_buffer[r->reader.read_len] = '\0';
return true;
}
static inline bool receiver_read_compressed(struct receiver_state *r, STREAM_HANDSHAKE *reason) {
internal_fatal(r->reader.read_buffer[r->reader.read_len] != '\0',
"%s: read_buffer does not start with zero #2", __FUNCTION__ );
// first use any available uncompressed data
if (likely(rrdpush_decompressed_bytes_in_buffer(&r->decompressor))) {
size_t available = sizeof(r->reader.read_buffer) - r->reader.read_len - 1;
if (likely(available)) {
size_t len = rrdpush_decompressor_get(&r->decompressor, r->reader.read_buffer + r->reader.read_len, available);
if (unlikely(!len)) {
internal_error(true, "decompressor returned zero length #1");
return false;
}
r->reader.read_len += (int)len;
r->reader.read_buffer[r->reader.read_len] = '\0';
}
else
internal_fatal(true, "The line to read is too big! Already have %zd bytes in read_buffer.", r->reader.read_len);
return true;
}
// no decompressed data available
// read the compression signature of the next block
if(unlikely(r->reader.read_len + r->decompressor.signature_size > sizeof(r->reader.read_buffer) - 1)) {
internal_error(true, "The last incomplete line does not leave enough room for the next compression header! "
"Already have %zd bytes in read_buffer.", r->reader.read_len);
return false;
}
// read the compression signature from the stream
// we have to do a loop here, because read_stream() may return less than the data we need
int bytes_read = 0;
do {
int ret = read_stream(r, r->reader.read_buffer + r->reader.read_len + bytes_read, r->decompressor.signature_size - bytes_read);
if (unlikely(ret <= 0)) {
*reason = read_stream_error_to_reason(ret);
return false;
}
bytes_read += ret;
} while(unlikely(bytes_read < (int)r->decompressor.signature_size));
worker_set_metric(WORKER_RECEIVER_JOB_BYTES_READ, (NETDATA_DOUBLE)bytes_read);
if(unlikely(bytes_read != (int)r->decompressor.signature_size))
fatal("read %d bytes, but expected compression signature of size %zu", bytes_read, r->decompressor.signature_size);
size_t compressed_message_size = rrdpush_decompressor_start(&r->decompressor, r->reader.read_buffer + r->reader.read_len, bytes_read);
if (unlikely(!compressed_message_size)) {
internal_error(true, "multiplexed uncompressed data in compressed stream!");
r->reader.read_len += bytes_read;
r->reader.read_buffer[r->reader.read_len] = '\0';
return true;
}
if(unlikely(compressed_message_size > COMPRESSION_MAX_MSG_SIZE)) {
netdata_log_error("received a compressed message of %zu bytes, which is bigger than the max compressed message size supported of %zu. Ignoring message.",
compressed_message_size, (size_t)COMPRESSION_MAX_MSG_SIZE);
return false;
}
// delete compression header from our read buffer
r->reader.read_buffer[r->reader.read_len] = '\0';
// Read the entire compressed block of compressed data
char compressed[compressed_message_size];
size_t compressed_bytes_read = 0;
do {
size_t start = compressed_bytes_read;
size_t remaining = compressed_message_size - start;
int last_read_bytes = read_stream(r, &compressed[start], remaining);
if (unlikely(last_read_bytes <= 0)) {
*reason = read_stream_error_to_reason(last_read_bytes);
return false;
}
compressed_bytes_read += last_read_bytes;
} while(unlikely(compressed_message_size > compressed_bytes_read));
worker_set_metric(WORKER_RECEIVER_JOB_BYTES_READ, (NETDATA_DOUBLE)compressed_bytes_read);
// decompress the compressed block
size_t bytes_to_parse = rrdpush_decompress(&r->decompressor, compressed, compressed_bytes_read);
if (unlikely(!bytes_to_parse)) {
internal_error(true, "no bytes to parse.");
return false;
}
worker_set_metric(WORKER_RECEIVER_JOB_BYTES_UNCOMPRESSED, (NETDATA_DOUBLE)bytes_to_parse);
// fill read buffer with decompressed data
size_t len = (int) rrdpush_decompressor_get(&r->decompressor, r->reader.read_buffer + r->reader.read_len, sizeof(r->reader.read_buffer) - r->reader.read_len - 1);
if (unlikely(!len)) {
internal_error(true, "decompressor returned zero length #2");
return false;
}
r->reader.read_len += (int)len;
r->reader.read_buffer[r->reader.read_len] = '\0';
return true;
}
bool plugin_is_enabled(struct plugind *cd);
static void receiver_set_exit_reason(struct receiver_state *rpt, STREAM_HANDSHAKE reason, bool force) {
if(force || !rpt->exit.reason)
rpt->exit.reason = reason;
}
static inline bool receiver_should_stop(struct receiver_state *rpt) {
static __thread size_t counter = 0;
if(nd_thread_signaled_to_cancel()) {
receiver_set_exit_reason(rpt, STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN, false);
return true;
}
if(unlikely(rpt->exit.shutdown)) {
receiver_set_exit_reason(rpt, STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN, false);
return true;
}
if(unlikely(!service_running(SERVICE_STREAMING))) {
receiver_set_exit_reason(rpt, STREAM_HANDSHAKE_DISCONNECT_NETDATA_EXIT, false);
return true;
}
if(unlikely((counter++ % 1000) == 0))
rpt->last_msg_t = now_monotonic_sec();
return false;
}
static size_t streaming_parser(struct receiver_state *rpt, struct plugind *cd, int fd, void *ssl) {
size_t result = 0;
PARSER *parser = NULL;
{
PARSER_USER_OBJECT user = {
.enabled = plugin_is_enabled(cd),
.host = rpt->host,
.opaque = rpt,
.cd = cd,
.trust_durations = 1,
.capabilities = rpt->capabilities,
};
parser = parser_init(&user, NULL, NULL, fd, PARSER_INPUT_SPLIT, ssl);
}
#ifdef ENABLE_H2O
parser->h2o_ctx = rpt->h2o_ctx;
#endif
pluginsd_keywords_init(parser, PARSER_INIT_STREAMING);
rrd_collector_started();
// this keeps the parser with its current value
// so, parser needs to be allocated before pushing it
CLEANUP_FUNCTION_REGISTER(pluginsd_process_thread_cleanup) parser_ptr = parser;
bool compressed_connection = rrdpush_decompression_initialize(rpt);
buffered_reader_init(&rpt->reader);
#ifdef NETDATA_LOG_STREAM_RECEIVE
{
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "/tmp/stream-receiver-%s.txt", rpt->host ? rrdhost_hostname(
rpt->host) : "unknown"
);
parser->user.stream_log_fp = fopen(filename, "w");
parser->user.stream_log_repertoire = PARSER_REP_METADATA;
}
#endif
CLEAN_BUFFER *buffer = buffer_create(sizeof(rpt->reader.read_buffer), NULL);
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_CB(NDF_REQUEST, line_splitter_reconstruct_line, &parser->line),
ND_LOG_FIELD_CB(NDF_NIDL_NODE, parser_reconstruct_node, parser),
ND_LOG_FIELD_CB(NDF_NIDL_INSTANCE, parser_reconstruct_instance, parser),
ND_LOG_FIELD_CB(NDF_NIDL_CONTEXT, parser_reconstruct_context, parser),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
while(!receiver_should_stop(rpt)) {
if(!buffered_reader_next_line(&rpt->reader, buffer)) {
STREAM_HANDSHAKE reason = STREAM_HANDSHAKE_DISCONNECT_UNKNOWN_SOCKET_READ_ERROR;
bool have_new_data = compressed_connection ? receiver_read_compressed(rpt, &reason)
: receiver_read_uncompressed(rpt, &reason);
if(unlikely(!have_new_data)) {
receiver_set_exit_reason(rpt, reason, false);
break;
}
continue;
}
if(unlikely(parser_action(parser, buffer->buffer))) {
receiver_set_exit_reason(rpt, STREAM_HANDSHAKE_DISCONNECT_PARSER_FAILED, false);
break;
}
buffer->len = 0;
buffer->buffer[0] = '\0';
}
result = parser->user.data_collections_count;
return result;
}
static void rrdpush_receiver_replication_reset(RRDHOST *host) {
RRDSET *st;
rrdset_foreach_read(st, host) {
rrdset_flag_clear(st, RRDSET_FLAG_RECEIVER_REPLICATION_IN_PROGRESS);
rrdset_flag_set(st, RRDSET_FLAG_RECEIVER_REPLICATION_FINISHED);
}
rrdset_foreach_done(st);
rrdhost_receiver_replicating_charts_zero(host);
}
static bool rrdhost_set_receiver(RRDHOST *host, struct receiver_state *rpt) {
bool signal_rrdcontext = false;
bool set_this = false;
netdata_mutex_lock(&host->receiver_lock);
if (!host->receiver) {
rrdhost_flag_clear(host, RRDHOST_FLAG_ORPHAN);
host->rrdpush_receiver_connection_counter++;
__atomic_add_fetch(&localhost->connected_children_count, 1, __ATOMIC_RELAXED);
host->receiver = rpt;
rpt->host = host;
host->child_connect_time = now_realtime_sec();
host->child_disconnected_time = 0;
host->child_last_chart_command = 0;
host->trigger_chart_obsoletion_check = 1;
if (rpt->config.health_enabled != CONFIG_BOOLEAN_NO) {
if (rpt->config.alarms_delay > 0) {
host->health.health_delay_up_to = now_realtime_sec() + rpt->config.alarms_delay;
nd_log(NDLS_DAEMON, NDLP_DEBUG,
"[%s]: Postponing health checks for %" PRId64 " seconds, because it was just connected.",
rrdhost_hostname(host),
(int64_t) rpt->config.alarms_delay);
}
}
host->health_log.health_log_history = rpt->config.alarms_history;
// this is a test
// if(rpt->hops <= host->sender->hops)
// rrdpush_sender_thread_stop(host, "HOPS MISMATCH", false);
signal_rrdcontext = true;
rrdpush_receiver_replication_reset(host);
rrdhost_flag_clear(rpt->host, RRDHOST_FLAG_RRDPUSH_RECEIVER_DISCONNECTED);
aclk_queue_node_info(rpt->host, true);
rrdpush_reset_destinations_postpone_time(host);
set_this = true;
}
netdata_mutex_unlock(&host->receiver_lock);
if(signal_rrdcontext)
rrdcontext_host_child_connected(host);
return set_this;
}
static void rrdhost_clear_receiver(struct receiver_state *rpt) {
RRDHOST *host = rpt->host;
if(host) {
bool signal_rrdcontext = false;
netdata_mutex_lock(&host->receiver_lock);
// Make sure that we detach this thread and don't kill a freshly arriving receiver
if(host->receiver == rpt) {
__atomic_sub_fetch(&localhost->connected_children_count, 1, __ATOMIC_RELAXED);
rrdhost_flag_set(rpt->host, RRDHOST_FLAG_RRDPUSH_RECEIVER_DISCONNECTED);
host->trigger_chart_obsoletion_check = 0;
host->child_connect_time = 0;
host->child_disconnected_time = now_realtime_sec();
host->health.health_enabled = 0;
rrdpush_sender_thread_stop(host, STREAM_HANDSHAKE_DISCONNECT_RECEIVER_LEFT, false);
signal_rrdcontext = true;
rrdpush_receiver_replication_reset(host);
rrdhost_flag_set(host, RRDHOST_FLAG_ORPHAN);
host->receiver = NULL;
host->rrdpush_last_receiver_exit_reason = rpt->exit.reason;
if(rpt->config.health_enabled)
rrdcalc_child_disconnected(host);
}
netdata_mutex_unlock(&host->receiver_lock);
if(signal_rrdcontext)
rrdcontext_host_child_disconnected(host);
rrdpush_reset_destinations_postpone_time(host);
}
}
bool stop_streaming_receiver(RRDHOST *host, STREAM_HANDSHAKE reason) {
bool ret = false;
netdata_mutex_lock(&host->receiver_lock);
if(host->receiver) {
if(!host->receiver->exit.shutdown) {
host->receiver->exit.shutdown = true;
receiver_set_exit_reason(host->receiver, reason, true);
shutdown(host->receiver->fd, SHUT_RDWR);
}
nd_thread_signal_cancel(host->receiver->thread);
}
int count = 2000;
while (host->receiver && count-- > 0) {
netdata_mutex_unlock(&host->receiver_lock);
// let the lock for the receiver thread to exit
sleep_usec(1 * USEC_PER_MS);
netdata_mutex_lock(&host->receiver_lock);
}
if(host->receiver)
netdata_log_error("STREAM '%s' [receive from [%s]:%s]: "
"thread %d takes too long to stop, giving up..."
, rrdhost_hostname(host)
, host->receiver->client_ip, host->receiver->client_port
, host->receiver->tid);
else
ret = true;
netdata_mutex_unlock(&host->receiver_lock);
return ret;
}
static void rrdpush_send_error_on_taken_over_connection(struct receiver_state *rpt, const char *msg) {
(void) send_timeout(
#ifdef ENABLE_HTTPS
&rpt->ssl,
#endif
rpt->fd,
(char *)msg,
strlen(msg),
0,
5);
}
void rrdpush_receive_log_status(struct receiver_state *rpt, const char *msg, const char *status, ND_LOG_FIELD_PRIORITY priority) {
// this function may be called BEFORE we spawn the receiver thread
// so, we need to add the fields again (it does not harm)
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_SRC_IP, rpt->client_ip),
ND_LOG_FIELD_TXT(NDF_SRC_PORT, rpt->client_port),
ND_LOG_FIELD_TXT(NDF_NIDL_NODE, (rpt->hostname && *rpt->hostname) ? rpt->hostname : ""),
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, status),
ND_LOG_FIELD_UUID(NDF_MESSAGE_ID, &streaming_from_child_msgid),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
nd_log(NDLS_ACCESS, priority, "api_key:'%s' machine_guid:'%s' msg:'%s'"
, (rpt->key && *rpt->key)? rpt->key : ""
, (rpt->machine_guid && *rpt->machine_guid) ? rpt->machine_guid : ""
, msg);
nd_log(NDLS_DAEMON, priority, "STREAM_RECEIVER for '%s': %s %s%s%s"
, (rpt->hostname && *rpt->hostname) ? rpt->hostname : ""
, msg
, rpt->exit.reason != STREAM_HANDSHAKE_NEVER?" (":""
, stream_handshake_error_to_string(rpt->exit.reason)
, rpt->exit.reason != STREAM_HANDSHAKE_NEVER?")":""
);
}
static void rrdpush_receive(struct receiver_state *rpt)
{
rpt->config.mode = default_rrd_memory_mode;
rpt->config.history = default_rrd_history_entries;
rpt->config.health_enabled = health_plugin_enabled();
rpt->config.alarms_delay = 60;
rpt->config.alarms_history = HEALTH_LOG_DEFAULT_HISTORY;
rpt->config.rrdpush_enabled = (int)default_rrdpush_enabled;
rpt->config.rrdpush_destination = default_rrdpush_destination;
rpt->config.rrdpush_api_key = default_rrdpush_api_key;
rpt->config.rrdpush_send_charts_matching = default_rrdpush_send_charts_matching;
rpt->config.rrdpush_enable_replication = default_rrdpush_enable_replication;
rpt->config.rrdpush_seconds_to_replicate = default_rrdpush_seconds_to_replicate;
rpt->config.rrdpush_replication_step = default_rrdpush_replication_step;
rpt->config.update_every = (int)appconfig_get_number(&stream_config, rpt->machine_guid, "update every", rpt->config.update_every);
if(rpt->config.update_every < 0) rpt->config.update_every = 1;
rpt->config.history = (int)appconfig_get_number(&stream_config, rpt->key, "default history", rpt->config.history);
rpt->config.history = (int)appconfig_get_number(&stream_config, rpt->machine_guid, "history", rpt->config.history);
if(rpt->config.history < 5) rpt->config.history = 5;
rpt->config.mode = rrd_memory_mode_id(appconfig_get(&stream_config, rpt->key, "default memory mode", rrd_memory_mode_name(rpt->config.mode)));
rpt->config.mode = rrd_memory_mode_id(appconfig_get(&stream_config, rpt->machine_guid, "memory mode", rrd_memory_mode_name(rpt->config.mode)));
if (unlikely(rpt->config.mode == RRD_MEMORY_MODE_DBENGINE && !dbengine_enabled)) {
netdata_log_error("STREAM '%s' [receive from %s:%s]: "
"dbengine is not enabled, falling back to default."
, rpt->hostname
, rpt->client_ip, rpt->client_port
);
rpt->config.mode = default_rrd_memory_mode;
}
rpt->config.health_enabled = appconfig_get_boolean_ondemand(&stream_config, rpt->key, "health enabled by default", rpt->config.health_enabled);
rpt->config.health_enabled = appconfig_get_boolean_ondemand(&stream_config, rpt->machine_guid, "health enabled", rpt->config.health_enabled);
rpt->config.alarms_delay = appconfig_get_number(&stream_config, rpt->key, "default postpone alarms on connect seconds", rpt->config.alarms_delay);
rpt->config.alarms_delay = appconfig_get_number(&stream_config, rpt->machine_guid, "postpone alarms on connect seconds", rpt->config.alarms_delay);
rpt->config.alarms_history = appconfig_get_number(&stream_config, rpt->key, "default health log history", rpt->config.alarms_history);
rpt->config.alarms_history = appconfig_get_number(&stream_config, rpt->machine_guid, "health log history", rpt->config.alarms_history);
rpt->config.rrdpush_enabled = appconfig_get_boolean(&stream_config, rpt->key, "default proxy enabled", rpt->config.rrdpush_enabled);
rpt->config.rrdpush_enabled = appconfig_get_boolean(&stream_config, rpt->machine_guid, "proxy enabled", rpt->config.rrdpush_enabled);
rpt->config.rrdpush_destination = appconfig_get(&stream_config, rpt->key, "default proxy destination", rpt->config.rrdpush_destination);
rpt->config.rrdpush_destination = appconfig_get(&stream_config, rpt->machine_guid, "proxy destination", rpt->config.rrdpush_destination);
rpt->config.rrdpush_api_key = appconfig_get(&stream_config, rpt->key, "default proxy api key", rpt->config.rrdpush_api_key);
rpt->config.rrdpush_api_key = appconfig_get(&stream_config, rpt->machine_guid, "proxy api key", rpt->config.rrdpush_api_key);
rpt->config.rrdpush_send_charts_matching = appconfig_get(&stream_config, rpt->key, "default proxy send charts matching", rpt->config.rrdpush_send_charts_matching);
rpt->config.rrdpush_send_charts_matching = appconfig_get(&stream_config, rpt->machine_guid, "proxy send charts matching", rpt->config.rrdpush_send_charts_matching);
rpt->config.rrdpush_enable_replication = appconfig_get_boolean(&stream_config, rpt->key, "enable replication", rpt->config.rrdpush_enable_replication);
rpt->config.rrdpush_enable_replication = appconfig_get_boolean(&stream_config, rpt->machine_guid, "enable replication", rpt->config.rrdpush_enable_replication);
rpt->config.rrdpush_seconds_to_replicate = appconfig_get_number(&stream_config, rpt->key, "seconds to replicate", rpt->config.rrdpush_seconds_to_replicate);
rpt->config.rrdpush_seconds_to_replicate = appconfig_get_number(&stream_config, rpt->machine_guid, "seconds to replicate", rpt->config.rrdpush_seconds_to_replicate);
rpt->config.rrdpush_replication_step = appconfig_get_number(&stream_config, rpt->key, "seconds per replication step", rpt->config.rrdpush_replication_step);
rpt->config.rrdpush_replication_step = appconfig_get_number(&stream_config, rpt->machine_guid, "seconds per replication step", rpt->config.rrdpush_replication_step);
rpt->config.rrdpush_compression = default_rrdpush_compression_enabled;
rpt->config.rrdpush_compression = appconfig_get_boolean(&stream_config, rpt->key, "enable compression", rpt->config.rrdpush_compression);
rpt->config.rrdpush_compression = appconfig_get_boolean(&stream_config, rpt->machine_guid, "enable compression", rpt->config.rrdpush_compression);
bool is_ephemeral = false;
is_ephemeral = appconfig_get_boolean(&stream_config, rpt->key, "is ephemeral node", CONFIG_BOOLEAN_NO);
is_ephemeral = appconfig_get_boolean(&stream_config, rpt->machine_guid, "is ephemeral node", is_ephemeral);
if(rpt->config.rrdpush_compression) {
char *order = appconfig_get(&stream_config, rpt->key, "compression algorithms order", RRDPUSH_COMPRESSION_ALGORITHMS_ORDER);
order = appconfig_get(&stream_config, rpt->machine_guid, "compression algorithms order", order);
rrdpush_parse_compression_order(rpt, order);
}
// find the host for this receiver
{
// this will also update the host with our system_info
RRDHOST *host = rrdhost_find_or_create(
rpt->hostname,
rpt->registry_hostname,
rpt->machine_guid,
rpt->os,
rpt->timezone,
rpt->abbrev_timezone,
rpt->utc_offset,
rpt->program_name,
rpt->program_version,
rpt->config.update_every,
rpt->config.history,
rpt->config.mode,
(unsigned int)(rpt->config.health_enabled != CONFIG_BOOLEAN_NO),
(unsigned int)(rpt->config.rrdpush_enabled && rpt->config.rrdpush_destination &&
*rpt->config.rrdpush_destination && rpt->config.rrdpush_api_key &&
*rpt->config.rrdpush_api_key),
rpt->config.rrdpush_destination,
rpt->config.rrdpush_api_key,
rpt->config.rrdpush_send_charts_matching,
rpt->config.rrdpush_enable_replication,
rpt->config.rrdpush_seconds_to_replicate,
rpt->config.rrdpush_replication_step,
rpt->system_info,
0);
if(!host) {
rrdpush_receive_log_status(
rpt,"failed to find/create host structure, rejecting connection",
RRDPUSH_STATUS_INTERNAL_SERVER_ERROR, NDLP_ERR);
rrdpush_send_error_on_taken_over_connection(rpt, START_STREAMING_ERROR_INTERNAL_ERROR);
goto cleanup;
}
if (unlikely(rrdhost_flag_check(host, RRDHOST_FLAG_PENDING_CONTEXT_LOAD))) {
rrdpush_receive_log_status(
rpt, "host is initializing, retry later",
RRDPUSH_STATUS_INITIALIZATION_IN_PROGRESS, NDLP_NOTICE);
rrdpush_send_error_on_taken_over_connection(rpt, START_STREAMING_ERROR_INITIALIZATION);
goto cleanup;
}
// system_info has been consumed by the host structure
rpt->system_info = NULL;
if(!rrdhost_set_receiver(host, rpt)) {
rrdpush_receive_log_status(
rpt, "host is already served by another receiver",
RRDPUSH_STATUS_DUPLICATE_RECEIVER, NDLP_INFO);
rrdpush_send_error_on_taken_over_connection(rpt, START_STREAMING_ERROR_ALREADY_STREAMING);
goto cleanup;
}
}
#ifdef NETDATA_INTERNAL_CHECKS
netdata_log_info("STREAM '%s' [receive from [%s]:%s]: "
"client willing to stream metrics for host '%s' with machine_guid '%s': "
"update every = %d, history = %d, memory mode = %s, health %s,%s"
, rpt->hostname
, rpt->client_ip
, rpt->client_port
, rrdhost_hostname(rpt->host)
, rpt->host->machine_guid
, rpt->host->rrd_update_every
, rpt->host->rrd_history_entries
, rrd_memory_mode_name(rpt->host->rrd_memory_mode)
, (rpt->config.health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((rpt->config.health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto")
#ifdef ENABLE_HTTPS
, (rpt->ssl.conn != NULL) ? " SSL," : ""
#else
, ""
#endif
);
#endif // NETDATA_INTERNAL_CHECKS
struct plugind cd = {
.update_every = default_rrd_update_every,
.unsafe = {
.spinlock = NETDATA_SPINLOCK_INITIALIZER,
.running = true,
.enabled = true,
},
.started_t = now_realtime_sec(),
};
// put the client IP and port into the buffers used by plugins.d
snprintfz(cd.id, CONFIG_MAX_NAME, "%s:%s", rpt->client_ip, rpt->client_port);
snprintfz(cd.filename, FILENAME_MAX, "%s:%s", rpt->client_ip, rpt->client_port);
snprintfz(cd.fullfilename, FILENAME_MAX, "%s:%s", rpt->client_ip, rpt->client_port);
snprintfz(cd.cmd, PLUGINSD_CMD_MAX, "%s:%s", rpt->client_ip, rpt->client_port);
rrdpush_select_receiver_compression_algorithm(rpt);
{
// netdata_log_info("STREAM %s [receive from [%s]:%s]: initializing communication...", rrdhost_hostname(rpt->host), rpt->client_ip, rpt->client_port);
char initial_response[HTTP_HEADER_SIZE];
if (stream_has_capability(rpt, STREAM_CAP_VCAPS)) {
log_receiver_capabilities(rpt);
sprintf(initial_response, "%s%u", START_STREAMING_PROMPT_VN, rpt->capabilities);
}
else if (stream_has_capability(rpt, STREAM_CAP_VN)) {
log_receiver_capabilities(rpt);
sprintf(initial_response, "%s%d", START_STREAMING_PROMPT_VN, stream_capabilities_to_vn(rpt->capabilities));
}
else if (stream_has_capability(rpt, STREAM_CAP_V2)) {
log_receiver_capabilities(rpt);
sprintf(initial_response, "%s", START_STREAMING_PROMPT_V2);
}
else { // stream_has_capability(rpt, STREAM_CAP_V1)
log_receiver_capabilities(rpt);
sprintf(initial_response, "%s", START_STREAMING_PROMPT_V1);
}
netdata_log_debug(D_STREAM, "Initial response to %s: %s", rpt->client_ip, initial_response);
#ifdef ENABLE_H2O
if (is_h2o_rrdpush(rpt)) {
h2o_stream_write(rpt->h2o_ctx, initial_response, strlen(initial_response));
} else {
#endif
ssize_t bytes_sent = send_timeout(
#ifdef ENABLE_HTTPS
&rpt->ssl,
#endif
rpt->fd, initial_response, strlen(initial_response), 0, 60);
if(bytes_sent != (ssize_t)strlen(initial_response)) {
internal_error(true, "Cannot send response, got %zd bytes, expecting %zu bytes", bytes_sent, strlen(initial_response));
rrdpush_receive_log_status(
rpt, "cannot reply back, dropping connection",
RRDPUSH_STATUS_CANT_REPLY, NDLP_ERR);
goto cleanup;
}
#ifdef ENABLE_H2O
}
#endif
}
#ifdef ENABLE_H2O
unless_h2o_rrdpush(rpt)
#endif
{
// remove the non-blocking flag from the socket
if(sock_delnonblock(rpt->fd) < 0)
netdata_log_error("STREAM '%s' [receive from [%s]:%s]: "
"cannot remove the non-blocking flag from socket %d"
, rrdhost_hostname(rpt->host)
, rpt->client_ip, rpt->client_port
, rpt->fd);
struct timeval timeout;
timeout.tv_sec = 600;
timeout.tv_usec = 0;
if (unlikely(setsockopt(rpt->fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof timeout) != 0))
netdata_log_error("STREAM '%s' [receive from [%s]:%s]: "
"cannot set timeout for socket %d"
, rrdhost_hostname(rpt->host)
, rpt->client_ip, rpt->client_port
, rpt->fd);
}
rrdpush_receive_log_status(
rpt, "connected and ready to receive data",
RRDPUSH_STATUS_CONNECTED, NDLP_INFO);
#ifdef ENABLE_ACLK
// in case we have cloud connection we inform cloud
// new child connected
if (netdata_cloud_enabled)
aclk_host_state_update(rpt->host, 1, 1);
#endif
rrdhost_set_is_parent_label();
if (is_ephemeral)
rrdhost_option_set(rpt->host, RRDHOST_OPTION_EPHEMERAL_HOST);
// let it reconnect to parent immediately
rrdpush_reset_destinations_postpone_time(rpt->host);
size_t count = streaming_parser(rpt, &cd, rpt->fd,
#ifdef ENABLE_HTTPS
(rpt->ssl.conn) ? &rpt->ssl : NULL
#else
NULL
#endif
);
receiver_set_exit_reason(rpt, STREAM_HANDSHAKE_DISCONNECT_PARSER_EXIT, false);
{
char msg[100 + 1];
snprintfz(msg, sizeof(msg) - 1, "disconnected (completed %zu updates)", count);
rrdpush_receive_log_status(
rpt, msg,
RRDPUSH_STATUS_DISCONNECTED, NDLP_WARNING);
}
#ifdef ENABLE_ACLK
// in case we have cloud connection we inform cloud
// a child disconnected
if (netdata_cloud_enabled)
aclk_host_state_update(rpt->host, 0, 1);
#endif
cleanup:
;
}
static void rrdpush_receiver_thread_cleanup(void *pptr) {
struct receiver_state *rpt = CLEANUP_FUNCTION_GET_PTR(pptr);
if(!rpt) return;
netdata_log_info("STREAM '%s' [receive from [%s]:%s]: "
"receive thread ended (task id %d)"
, rpt->hostname ? rpt->hostname : "-"
, rpt->client_ip ? rpt->client_ip : "-", rpt->client_port ? rpt->client_port : "-", gettid_cached());
worker_unregister();
rrdhost_clear_receiver(rpt);
receiver_state_free(rpt);
rrdhost_set_is_parent_label();
}
static bool stream_receiver_log_capabilities(BUFFER *wb, void *ptr) {
struct receiver_state *rpt = ptr;
if(!rpt)
return false;
stream_capabilities_to_string(wb, rpt->capabilities);
return true;
}
static bool stream_receiver_log_transport(BUFFER *wb, void *ptr) {
struct receiver_state *rpt = ptr;
if(!rpt)
return false;
#ifdef ENABLE_HTTPS
buffer_strcat(wb, SSL_connection(&rpt->ssl) ? "https" : "http");
#else
buffer_strcat(wb, "http");
#endif
return true;
}
void *rrdpush_receiver_thread(void *ptr) {
CLEANUP_FUNCTION_REGISTER(rrdpush_receiver_thread_cleanup) cleanup_ptr = ptr;
worker_register("STREAMRCV");
worker_register_job_custom_metric(WORKER_RECEIVER_JOB_BYTES_READ,
"received bytes", "bytes/s",
WORKER_METRIC_INCREMENT);
worker_register_job_custom_metric(WORKER_RECEIVER_JOB_BYTES_UNCOMPRESSED,
"uncompressed bytes", "bytes/s",
WORKER_METRIC_INCREMENT);
worker_register_job_custom_metric(WORKER_RECEIVER_JOB_REPLICATION_COMPLETION,
"replication completion", "%",
WORKER_METRIC_ABSOLUTE);
struct receiver_state *rpt = (struct receiver_state *) ptr;
rpt->tid = gettid_cached();
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_SRC_IP, rpt->client_ip),
ND_LOG_FIELD_TXT(NDF_SRC_PORT, rpt->client_port),
ND_LOG_FIELD_TXT(NDF_NIDL_NODE, rpt->hostname),
ND_LOG_FIELD_CB(NDF_SRC_TRANSPORT, stream_receiver_log_transport, rpt),
ND_LOG_FIELD_CB(NDF_SRC_CAPABILITIES, stream_receiver_log_capabilities, rpt),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
netdata_log_info("STREAM %s [%s]:%s: receive thread started", rpt->hostname, rpt->client_ip
, rpt->client_port);
rrdpush_receive(rpt);
return NULL;
}