src/streaming/sender.c
// SPDX-License-Identifier: GPL-3.0-or-later
#include "rrdpush.h"
#include "common.h"
#include "aclk/https_client.h"
#define WORKER_SENDER_JOB_CONNECT 0
#define WORKER_SENDER_JOB_PIPE_READ 1
#define WORKER_SENDER_JOB_SOCKET_RECEIVE 2
#define WORKER_SENDER_JOB_EXECUTE 3
#define WORKER_SENDER_JOB_SOCKET_SEND 4
#define WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE 5
#define WORKER_SENDER_JOB_DISCONNECT_OVERFLOW 6
#define WORKER_SENDER_JOB_DISCONNECT_TIMEOUT 7
#define WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR 8
#define WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR 9
#define WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR 10
#define WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED 11
#define WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR 12
#define WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR 13
#define WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION 14
#define WORKER_SENDER_JOB_BUFFER_RATIO 15
#define WORKER_SENDER_JOB_BYTES_RECEIVED 16
#define WORKER_SENDER_JOB_BYTES_SENT 17
#define WORKER_SENDER_JOB_BYTES_COMPRESSED 18
#define WORKER_SENDER_JOB_BYTES_UNCOMPRESSED 19
#define WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO 20
#define WORKER_SENDER_JOB_REPLAY_REQUEST 21
#define WORKER_SENDER_JOB_FUNCTION_REQUEST 22
#define WORKER_SENDER_JOB_REPLAY_DICT_SIZE 23
#define WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION 24
#if WORKER_UTILIZATION_MAX_JOB_TYPES < 25
#error WORKER_UTILIZATION_MAX_JOB_TYPES has to be at least 25
#endif
extern struct config stream_config;
extern char *netdata_ssl_ca_path;
extern char *netdata_ssl_ca_file;
static __thread BUFFER *sender_thread_buffer = NULL;
static __thread bool sender_thread_buffer_used = false;
static __thread time_t sender_thread_buffer_last_reset_s = 0;
void sender_thread_buffer_free(void) {
buffer_free(sender_thread_buffer);
sender_thread_buffer = NULL;
sender_thread_buffer_used = false;
}
// Collector thread starting a transmission
BUFFER *sender_start(struct sender_state *s) {
if(unlikely(sender_thread_buffer_used))
fatal("STREAMING: thread buffer is used multiple times concurrently.");
if(unlikely(rrdpush_sender_last_buffer_recreate_get(s) > sender_thread_buffer_last_reset_s)) {
if(unlikely(sender_thread_buffer && sender_thread_buffer->size > THREAD_BUFFER_INITIAL_SIZE)) {
buffer_free(sender_thread_buffer);
sender_thread_buffer = NULL;
}
}
if(unlikely(!sender_thread_buffer)) {
sender_thread_buffer = buffer_create(THREAD_BUFFER_INITIAL_SIZE, &netdata_buffers_statistics.buffers_streaming);
sender_thread_buffer_last_reset_s = rrdpush_sender_last_buffer_recreate_get(s);
}
sender_thread_buffer_used = true;
buffer_flush(sender_thread_buffer);
return sender_thread_buffer;
}
static inline void rrdpush_sender_thread_close_socket(RRDHOST *host);
#define SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE 3
// Collector thread finishing a transmission
void sender_commit(struct sender_state *s, BUFFER *wb, STREAM_TRAFFIC_TYPE type) {
if(unlikely(wb != sender_thread_buffer))
fatal("STREAMING: sender is trying to commit a buffer that is not this thread's buffer.");
if(unlikely(!sender_thread_buffer_used))
fatal("STREAMING: sender is committing a buffer twice.");
sender_thread_buffer_used = false;
char *src = (char *)buffer_tostring(wb);
size_t src_len = buffer_strlen(wb);
if(unlikely(!src || !src_len))
return;
sender_lock(s);
#ifdef NETDATA_LOG_STREAM_SENDER
if(type == STREAM_TRAFFIC_TYPE_METADATA) {
if(!s->stream_log_fp) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "/tmp/stream-sender-%s.txt", s->host ? rrdhost_hostname(s->host) : "unknown");
s->stream_log_fp = fopen(filename, "w");
}
fprintf(s->stream_log_fp, "\n--- SEND MESSAGE START: %s ----\n"
"%s"
"--- SEND MESSAGE END ----------------------------------------\n"
, rrdhost_hostname(s->host), src
);
}
#endif
if(unlikely(s->buffer->max_size < (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE)) {
netdata_log_info("STREAM %s [send to %s]: max buffer size of %zu is too small for a data message of size %zu. Increasing the max buffer size to %d times the max data message size.",
rrdhost_hostname(s->host), s->connected_to, s->buffer->max_size, buffer_strlen(wb) + 1, SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE);
s->buffer->max_size = (src_len + 1) * SENDER_BUFFER_ADAPT_TO_TIMES_MAX_SIZE;
}
if (s->compressor.initialized) {
while(src_len) {
size_t size_to_compress = src_len;
if(unlikely(size_to_compress > COMPRESSION_MAX_MSG_SIZE)) {
if (stream_has_capability(s, STREAM_CAP_BINARY))
size_to_compress = COMPRESSION_MAX_MSG_SIZE;
else {
if (size_to_compress > COMPRESSION_MAX_MSG_SIZE) {
// we need to find the last newline
// so that the decompressor will have a whole line to work with
const char *t = &src[COMPRESSION_MAX_MSG_SIZE];
while (--t >= src)
if (unlikely(*t == '\n'))
break;
if (t <= src) {
size_to_compress = COMPRESSION_MAX_MSG_SIZE;
} else
size_to_compress = t - src + 1;
}
}
}
const char *dst;
size_t dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst);
if (!dst_len) {
netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed. Resetting compressor and re-trying",
rrdhost_hostname(s->host), s->connected_to);
rrdpush_compression_initialize(s);
dst_len = rrdpush_compress(&s->compressor, src, size_to_compress, &dst);
if(!dst_len) {
netdata_log_error("STREAM %s [send to %s]: COMPRESSION failed again. Deactivating compression",
rrdhost_hostname(s->host), s->connected_to);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION);
rrdpush_compression_deactivate(s);
rrdpush_sender_thread_close_socket(s->host);
sender_unlock(s);
return;
}
}
rrdpush_signature_t signature = rrdpush_compress_encode_signature(dst_len);
#ifdef NETDATA_INTERNAL_CHECKS
// check if reversing the signature provides the same length
size_t decoded_dst_len = rrdpush_decompress_decode_signature((const char *)&signature, sizeof(signature));
if(decoded_dst_len != dst_len)
fatal("RRDPUSH COMPRESSION: invalid signature, original payload %zu bytes, "
"compressed payload length %zu bytes, but signature says payload is %zu bytes",
size_to_compress, dst_len, decoded_dst_len);
#endif
if(cbuffer_add_unsafe(s->buffer, (const char *)&signature, sizeof(signature)))
s->flags |= SENDER_FLAG_OVERFLOW;
else {
if(cbuffer_add_unsafe(s->buffer, dst, dst_len))
s->flags |= SENDER_FLAG_OVERFLOW;
else
s->sent_bytes_on_this_connection_per_type[type] += dst_len + sizeof(signature);
}
src = src + size_to_compress;
src_len -= size_to_compress;
}
}
else if(cbuffer_add_unsafe(s->buffer, src, src_len))
s->flags |= SENDER_FLAG_OVERFLOW;
else
s->sent_bytes_on_this_connection_per_type[type] += src_len;
replication_recalculate_buffer_used_ratio_unsafe(s);
bool signal_sender = false;
if(!rrdpush_sender_pipe_has_pending_data(s)) {
rrdpush_sender_pipe_set_pending_data(s);
signal_sender = true;
}
sender_unlock(s);
if(signal_sender && (!stream_has_capability(s, STREAM_CAP_INTERPOLATED) || type != STREAM_TRAFFIC_TYPE_DATA))
rrdpush_signal_sender_to_wake_up(s);
}
static inline void rrdpush_sender_add_host_variable_to_buffer(BUFFER *wb, const RRDVAR_ACQUIRED *rva) {
buffer_sprintf(
wb
, "VARIABLE HOST %s = " NETDATA_DOUBLE_FORMAT "\n"
, rrdvar_name(rva)
, rrdvar2number(rva)
);
netdata_log_debug(D_STREAM, "RRDVAR pushed HOST VARIABLE %s = " NETDATA_DOUBLE_FORMAT, rrdvar_name(rva), rrdvar2number(rva));
}
void rrdpush_sender_send_this_host_variable_now(RRDHOST *host, const RRDVAR_ACQUIRED *rva) {
if(rrdhost_can_send_definitions_to_parent(host)) {
BUFFER *wb = sender_start(host->sender);
rrdpush_sender_add_host_variable_to_buffer(wb, rva);
sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA);
sender_thread_buffer_free();
}
}
struct custom_host_variables_callback {
BUFFER *wb;
};
static int rrdpush_sender_thread_custom_host_variables_callback(const DICTIONARY_ITEM *item __maybe_unused, void *rrdvar_ptr __maybe_unused, void *struct_ptr) {
const RRDVAR_ACQUIRED *rv = (const RRDVAR_ACQUIRED *)item;
struct custom_host_variables_callback *tmp = struct_ptr;
BUFFER *wb = tmp->wb;
rrdpush_sender_add_host_variable_to_buffer(wb, rv);
return 1;
}
static void rrdpush_sender_thread_send_custom_host_variables(RRDHOST *host) {
if(rrdhost_can_send_definitions_to_parent(host)) {
BUFFER *wb = sender_start(host->sender);
struct custom_host_variables_callback tmp = {
.wb = wb
};
int ret = rrdvar_walkthrough_read(host->rrdvars, rrdpush_sender_thread_custom_host_variables_callback, &tmp);
(void)ret;
sender_commit(host->sender, wb, STREAM_TRAFFIC_TYPE_METADATA);
sender_thread_buffer_free();
netdata_log_debug(D_STREAM, "RRDVAR sent %d VARIABLES", ret);
}
}
// resets all the chart, so that their definitions
// will be resent to the central netdata
static void rrdpush_sender_thread_reset_all_charts(RRDHOST *host) {
RRDSET *st;
rrdset_foreach_read(st, host) {
rrdset_flag_clear(st, RRDSET_FLAG_SENDER_REPLICATION_IN_PROGRESS);
rrdset_flag_set(st, RRDSET_FLAG_SENDER_REPLICATION_FINISHED);
st->rrdpush.sender.resync_time_s = 0;
RRDDIM *rd;
rrddim_foreach_read(rd, st)
rrddim_metadata_exposed_upstream_clear(rd);
rrddim_foreach_done(rd);
rrdset_metadata_updated(st);
}
rrdset_foreach_done(st);
rrdhost_sender_replicating_charts_zero(host);
}
static void rrdpush_sender_cbuffer_recreate_timed(struct sender_state *s, time_t now_s, bool have_mutex, bool force) {
static __thread time_t last_reset_time_s = 0;
if(!force && now_s - last_reset_time_s < 300)
return;
if(!have_mutex)
sender_lock(s);
rrdpush_sender_last_buffer_recreate_set(s, now_s);
last_reset_time_s = now_s;
if(s->buffer && s->buffer->size > CBUFFER_INITIAL_SIZE) {
size_t max = s->buffer->max_size;
cbuffer_free(s->buffer);
s->buffer = cbuffer_new(CBUFFER_INITIAL_SIZE, max, &netdata_buffers_statistics.cbuffers_streaming);
}
sender_thread_buffer_free();
if(!have_mutex)
sender_unlock(s);
}
static void rrdpush_sender_cbuffer_flush(RRDHOST *host) {
rrdpush_sender_set_flush_time(host->sender);
sender_lock(host->sender);
// flush the output buffer from any data it may have
cbuffer_flush(host->sender->buffer);
rrdpush_sender_cbuffer_recreate_timed(host->sender, now_monotonic_sec(), true, true);
replication_recalculate_buffer_used_ratio_unsafe(host->sender);
sender_unlock(host->sender);
}
static void rrdpush_sender_charts_and_replication_reset(RRDHOST *host) {
rrdpush_sender_set_flush_time(host->sender);
// stop all replication commands inflight
replication_sender_delete_pending_requests(host->sender);
// reset the state of all charts
rrdpush_sender_thread_reset_all_charts(host);
rrdpush_sender_replicating_charts_zero(host->sender);
}
static void rrdpush_sender_on_connect(RRDHOST *host) {
rrdpush_sender_cbuffer_flush(host);
rrdpush_sender_charts_and_replication_reset(host);
}
static void rrdpush_sender_after_connect(RRDHOST *host) {
rrdpush_sender_thread_send_custom_host_variables(host);
}
static inline void rrdpush_sender_thread_close_socket(RRDHOST *host) {
#ifdef ENABLE_HTTPS
netdata_ssl_close(&host->sender->ssl);
#endif
if(host->sender->rrdpush_sender_socket != -1) {
close(host->sender->rrdpush_sender_socket);
host->sender->rrdpush_sender_socket = -1;
}
rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED);
// do not flush the circular buffer here
// this function is called sometimes with the mutex lock, sometimes without the lock
rrdpush_sender_charts_and_replication_reset(host);
}
void rrdpush_encode_variable(stream_encoded_t *se, RRDHOST *host) {
se->os_name = (host->system_info->host_os_name)?url_encode(host->system_info->host_os_name):strdupz("");
se->os_id = (host->system_info->host_os_id)?url_encode(host->system_info->host_os_id):strdupz("");
se->os_version = (host->system_info->host_os_version)?url_encode(host->system_info->host_os_version):strdupz("");
se->kernel_name = (host->system_info->kernel_name)?url_encode(host->system_info->kernel_name):strdupz("");
se->kernel_version = (host->system_info->kernel_version)?url_encode(host->system_info->kernel_version):strdupz("");
}
void rrdpush_clean_encoded(stream_encoded_t *se) {
if (se->os_name) {
freez(se->os_name);
se->os_name = NULL;
}
if (se->os_id) {
freez(se->os_id);
se->os_id = NULL;
}
if (se->os_version) {
freez(se->os_version);
se->os_version = NULL;
}
if (se->kernel_name) {
freez(se->kernel_name);
se->kernel_name = NULL;
}
if (se->kernel_version) {
freez(se->kernel_version);
se->kernel_version = NULL;
}
}
struct {
const char *response;
const char *status;
size_t length;
int32_t version;
bool dynamic;
const char *error;
int worker_job_id;
int postpone_reconnect_seconds;
ND_LOG_FIELD_PRIORITY priority;
} stream_responses[] = {
{
.response = START_STREAMING_PROMPT_VN,
.length = sizeof(START_STREAMING_PROMPT_VN) - 1,
.status = RRDPUSH_STATUS_CONNECTED,
.version = STREAM_HANDSHAKE_OK_V3, // and above
.dynamic = true, // dynamic = we will parse the version / capabilities
.error = NULL,
.worker_job_id = 0,
.postpone_reconnect_seconds = 0,
.priority = NDLP_INFO,
},
{
.response = START_STREAMING_PROMPT_V2,
.length = sizeof(START_STREAMING_PROMPT_V2) - 1,
.status = RRDPUSH_STATUS_CONNECTED,
.version = STREAM_HANDSHAKE_OK_V2,
.dynamic = false,
.error = NULL,
.worker_job_id = 0,
.postpone_reconnect_seconds = 0,
.priority = NDLP_INFO,
},
{
.response = START_STREAMING_PROMPT_V1,
.length = sizeof(START_STREAMING_PROMPT_V1) - 1,
.status = RRDPUSH_STATUS_CONNECTED,
.version = STREAM_HANDSHAKE_OK_V1,
.dynamic = false,
.error = NULL,
.worker_job_id = 0,
.postpone_reconnect_seconds = 0,
.priority = NDLP_INFO,
},
{
.response = START_STREAMING_ERROR_SAME_LOCALHOST,
.length = sizeof(START_STREAMING_ERROR_SAME_LOCALHOST) - 1,
.status = RRDPUSH_STATUS_LOCALHOST,
.version = STREAM_HANDSHAKE_ERROR_LOCALHOST,
.dynamic = false,
.error = "remote server rejected this stream, the host we are trying to stream is its localhost",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 60 * 60, // the IP may change, try it every hour
.priority = NDLP_DEBUG,
},
{
.response = START_STREAMING_ERROR_ALREADY_STREAMING,
.length = sizeof(START_STREAMING_ERROR_ALREADY_STREAMING) - 1,
.status = RRDPUSH_STATUS_ALREADY_CONNECTED,
.version = STREAM_HANDSHAKE_ERROR_ALREADY_CONNECTED,
.dynamic = false,
.error = "remote server rejected this stream, the host we are trying to stream is already streamed to it",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 2 * 60, // 2 minutes
.priority = NDLP_DEBUG,
},
{
.response = START_STREAMING_ERROR_NOT_PERMITTED,
.length = sizeof(START_STREAMING_ERROR_NOT_PERMITTED) - 1,
.status = RRDPUSH_STATUS_PERMISSION_DENIED,
.version = STREAM_HANDSHAKE_ERROR_DENIED,
.dynamic = false,
.error = "remote server denied access, probably we don't have the right API key?",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 1 * 60, // 1 minute
.priority = NDLP_ERR,
},
{
.response = START_STREAMING_ERROR_BUSY_TRY_LATER,
.length = sizeof(START_STREAMING_ERROR_BUSY_TRY_LATER) - 1,
.status = RRDPUSH_STATUS_RATE_LIMIT,
.version = STREAM_HANDSHAKE_BUSY_TRY_LATER,
.dynamic = false,
.error = "remote server is currently busy, we should try later",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 2 * 60, // 2 minutes
.priority = NDLP_NOTICE,
},
{
.response = START_STREAMING_ERROR_INTERNAL_ERROR,
.length = sizeof(START_STREAMING_ERROR_INTERNAL_ERROR) - 1,
.status = RRDPUSH_STATUS_INTERNAL_SERVER_ERROR,
.version = STREAM_HANDSHAKE_INTERNAL_ERROR,
.dynamic = false,
.error = "remote server is encountered an internal error, we should try later",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 5 * 60, // 5 minutes
.priority = NDLP_CRIT,
},
{
.response = START_STREAMING_ERROR_INITIALIZATION,
.length = sizeof(START_STREAMING_ERROR_INITIALIZATION) - 1,
.status = RRDPUSH_STATUS_INITIALIZATION_IN_PROGRESS,
.version = STREAM_HANDSHAKE_INITIALIZATION,
.dynamic = false,
.error = "remote server is initializing, we should try later",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 2 * 60, // 2 minute
.priority = NDLP_NOTICE,
},
// terminator
{
.response = NULL,
.length = 0,
.status = RRDPUSH_STATUS_BAD_HANDSHAKE,
.version = STREAM_HANDSHAKE_ERROR_BAD_HANDSHAKE,
.dynamic = false,
.error = "remote node response is not understood, is it Netdata?",
.worker_job_id = WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE,
.postpone_reconnect_seconds = 1 * 60, // 1 minute
.priority = NDLP_ERR,
}
};
static inline bool rrdpush_sender_validate_response(RRDHOST *host, struct sender_state *s, char *http, size_t http_length) {
int32_t version = STREAM_HANDSHAKE_ERROR_BAD_HANDSHAKE;
int i;
for(i = 0; stream_responses[i].response ; i++) {
if(stream_responses[i].dynamic &&
http_length > stream_responses[i].length && http_length < (stream_responses[i].length + 30) &&
strncmp(http, stream_responses[i].response, stream_responses[i].length) == 0) {
version = str2i(&http[stream_responses[i].length]);
break;
}
else if(http_length == stream_responses[i].length && strcmp(http, stream_responses[i].response) == 0) {
version = stream_responses[i].version;
break;
}
}
if(version >= STREAM_HANDSHAKE_OK_V1) {
host->destination->reason = version;
host->destination->postpone_reconnection_until = now_realtime_sec() + s->reconnect_delay;
s->capabilities = convert_stream_version_to_capabilities(version, host, true);
return true;
}
ND_LOG_FIELD_PRIORITY priority = stream_responses[i].priority;
const char *error = stream_responses[i].error;
const char *status = stream_responses[i].status;
int worker_job_id = stream_responses[i].worker_job_id;
int delay = stream_responses[i].postpone_reconnect_seconds;
worker_is_busy(worker_job_id);
rrdpush_sender_thread_close_socket(host);
host->destination->reason = version;
host->destination->postpone_reconnection_until = now_realtime_sec() + delay;
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, status),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
char buf[RFC3339_MAX_LENGTH];
rfc3339_datetime_ut(buf, sizeof(buf), host->destination->postpone_reconnection_until * USEC_PER_SEC, 0, false);
nd_log(NDLS_DAEMON, priority,
"STREAM %s [send to %s]: %s - will retry in %d secs, at %s",
rrdhost_hostname(host), s->connected_to, error, delay, buf);
return false;
}
unsigned char alpn_proto_list[] = {
18, 'n', 'e', 't', 'd', 'a', 't', 'a', '_', 's', 't', 'r', 'e', 'a', 'm', '/', '2', '.', '0',
8, 'h', 't', 't', 'p', '/', '1', '.', '1'
};
#define CONN_UPGRADE_VAL "upgrade"
static bool rrdpush_sender_connect_ssl(struct sender_state *s __maybe_unused) {
#ifdef ENABLE_HTTPS
RRDHOST *host = s->host;
bool ssl_required = host->destination && host->destination->ssl;
netdata_ssl_close(&host->sender->ssl);
if(!ssl_required)
return true;
if (netdata_ssl_open_ext(&host->sender->ssl, netdata_ssl_streaming_sender_ctx, s->rrdpush_sender_socket, alpn_proto_list, sizeof(alpn_proto_list))) {
if(!netdata_ssl_connect(&host->sender->ssl)) {
// couldn't connect
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_SSL_ERROR),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR);
rrdpush_sender_thread_close_socket(host);
host->destination->reason = STREAM_HANDSHAKE_ERROR_SSL_ERROR;
host->destination->postpone_reconnection_until = now_realtime_sec() + 5 * 60;
return false;
}
if (netdata_ssl_validate_certificate_sender &&
security_test_certificate(host->sender->ssl.conn)) {
// certificate is not valid
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_INVALID_SSL_CERTIFICATE),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR);
netdata_log_error("SSL: closing the stream connection, because the server SSL certificate is not valid.");
rrdpush_sender_thread_close_socket(host);
host->destination->reason = STREAM_HANDSHAKE_ERROR_INVALID_CERTIFICATE;
host->destination->postpone_reconnection_until = now_realtime_sec() + 5 * 60;
return false;
}
return true;
}
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CANT_ESTABLISH_SSL_CONNECTION),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
netdata_log_error("SSL: failed to establish connection.");
return false;
#else
// SSL is not enabled
return true;
#endif
}
static int rrdpush_http_upgrade_prelude(RRDHOST *host, struct sender_state *s) {
char http[HTTP_HEADER_SIZE + 1];
snprintfz(http, HTTP_HEADER_SIZE,
"GET " NETDATA_STREAM_URL HTTP_1_1 HTTP_ENDL
"Upgrade: " NETDATA_STREAM_PROTO_NAME HTTP_ENDL
"Connection: Upgrade"
HTTP_HDR_END);
ssize_t bytes = send_timeout(
#ifdef ENABLE_HTTPS
&host->sender->ssl,
#endif
s->rrdpush_sender_socket,
http,
strlen(http),
0,
1000);
bytes = recv_timeout(
#ifdef ENABLE_HTTPS
&host->sender->ssl,
#endif
s->rrdpush_sender_socket,
http,
HTTP_HEADER_SIZE,
0,
1000);
if (bytes <= 0) {
error_report("Error reading from remote");
return 1;
}
rbuf_t buf = rbuf_create(bytes);
rbuf_push(buf, http, bytes);
http_parse_ctx ctx;
http_parse_ctx_create(&ctx);
ctx.flags |= HTTP_PARSE_FLAG_DONT_WAIT_FOR_CONTENT;
int rc;
// while((rc = parse_http_response(buf, &ctx)) == HTTP_PARSE_NEED_MORE_DATA);
rc = parse_http_response(buf, &ctx);
if (rc != HTTP_PARSE_SUCCESS) {
error_report("Failed to parse HTTP response sent. (%d)", rc);
goto err_cleanup;
}
if (ctx.http_code == HTTP_RESP_MOVED_PERM) {
const char *hdr = get_http_header_by_name(&ctx, "location");
if (hdr)
error_report("HTTP response is %d Moved Permanently (location: \"%s\") instead of expected %d Switching Protocols.", ctx.http_code, hdr, HTTP_RESP_SWITCH_PROTO);
else
error_report("HTTP response is %d instead of expected %d Switching Protocols.", ctx.http_code, HTTP_RESP_SWITCH_PROTO);
goto err_cleanup;
}
if (ctx.http_code == HTTP_RESP_NOT_FOUND) {
error_report("HTTP response is %d instead of expected %d Switching Protocols. Parent version too old.", ctx.http_code, HTTP_RESP_SWITCH_PROTO);
// TODO set some flag here that will signify parent is older version
// and to try connection without rrdpush_http_upgrade_prelude next time
goto err_cleanup;
}
if (ctx.http_code != HTTP_RESP_SWITCH_PROTO) {
error_report("HTTP response is %d instead of expected %d Switching Protocols", ctx.http_code, HTTP_RESP_SWITCH_PROTO);
goto err_cleanup;
}
const char *hdr = get_http_header_by_name(&ctx, "connection");
if (!hdr) {
error_report("Missing \"connection\" header in reply");
goto err_cleanup;
}
if (strncmp(hdr, CONN_UPGRADE_VAL, strlen(CONN_UPGRADE_VAL))) {
error_report("Expected \"connection: " CONN_UPGRADE_VAL "\"");
goto err_cleanup;
}
hdr = get_http_header_by_name(&ctx, "upgrade");
if (!hdr) {
error_report("Missing \"upgrade\" header in reply");
goto err_cleanup;
}
if (strncmp(hdr, NETDATA_STREAM_PROTO_NAME, strlen(NETDATA_STREAM_PROTO_NAME))) {
error_report("Expected \"upgrade: " NETDATA_STREAM_PROTO_NAME "\"");
goto err_cleanup;
}
netdata_log_debug(D_STREAM, "Stream sender upgrade to \"" NETDATA_STREAM_PROTO_NAME "\" successful");
rbuf_free(buf);
http_parse_ctx_destroy(&ctx);
return 0;
err_cleanup:
rbuf_free(buf);
http_parse_ctx_destroy(&ctx);
return 1;
}
static bool rrdpush_sender_thread_connect_to_parent(RRDHOST *host, int default_port, int timeout, struct sender_state *s) {
struct timeval tv = {
.tv_sec = timeout,
.tv_usec = 0
};
// make sure the socket is closed
rrdpush_sender_thread_close_socket(host);
s->rrdpush_sender_socket = connect_to_one_of_destinations(
host
, default_port
, &tv
, &s->reconnects_counter
, s->connected_to
, sizeof(s->connected_to)-1
, &host->destination
);
if(unlikely(s->rrdpush_sender_socket == -1)) {
// netdata_log_error("STREAM %s [send to %s]: could not connect to parent node at this time.", rrdhost_hostname(host), host->rrdpush_send_destination);
return false;
}
// netdata_log_info("STREAM %s [send to %s]: initializing communication...", rrdhost_hostname(host), s->connected_to);
// reset our capabilities to default
s->capabilities = stream_our_capabilities(host, true);
/* TODO: During the implementation of #7265 switch the set of variables to HOST_* and CONTAINER_* if the
version negotiation resulted in a high enough version.
*/
stream_encoded_t se;
rrdpush_encode_variable(&se, host);
host->sender->hops = host->system_info->hops + 1;
char http[HTTP_HEADER_SIZE + 1];
int eol = snprintfz(http, HTTP_HEADER_SIZE,
"STREAM "
"key=%s"
"&hostname=%s"
"®istry_hostname=%s"
"&machine_guid=%s"
"&update_every=%d"
"&os=%s"
"&timezone=%s"
"&abbrev_timezone=%s"
"&utc_offset=%d"
"&hops=%d"
"&ml_capable=%d"
"&ml_enabled=%d"
"&mc_version=%d"
"&ver=%u"
"&NETDATA_INSTANCE_CLOUD_TYPE=%s"
"&NETDATA_INSTANCE_CLOUD_INSTANCE_TYPE=%s"
"&NETDATA_INSTANCE_CLOUD_INSTANCE_REGION=%s"
"&NETDATA_SYSTEM_OS_NAME=%s"
"&NETDATA_SYSTEM_OS_ID=%s"
"&NETDATA_SYSTEM_OS_ID_LIKE=%s"
"&NETDATA_SYSTEM_OS_VERSION=%s"
"&NETDATA_SYSTEM_OS_VERSION_ID=%s"
"&NETDATA_SYSTEM_OS_DETECTION=%s"
"&NETDATA_HOST_IS_K8S_NODE=%s"
"&NETDATA_SYSTEM_KERNEL_NAME=%s"
"&NETDATA_SYSTEM_KERNEL_VERSION=%s"
"&NETDATA_SYSTEM_ARCHITECTURE=%s"
"&NETDATA_SYSTEM_VIRTUALIZATION=%s"
"&NETDATA_SYSTEM_VIRT_DETECTION=%s"
"&NETDATA_SYSTEM_CONTAINER=%s"
"&NETDATA_SYSTEM_CONTAINER_DETECTION=%s"
"&NETDATA_CONTAINER_OS_NAME=%s"
"&NETDATA_CONTAINER_OS_ID=%s"
"&NETDATA_CONTAINER_OS_ID_LIKE=%s"
"&NETDATA_CONTAINER_OS_VERSION=%s"
"&NETDATA_CONTAINER_OS_VERSION_ID=%s"
"&NETDATA_CONTAINER_OS_DETECTION=%s"
"&NETDATA_SYSTEM_CPU_LOGICAL_CPU_COUNT=%s"
"&NETDATA_SYSTEM_CPU_FREQ=%s"
"&NETDATA_SYSTEM_TOTAL_RAM=%s"
"&NETDATA_SYSTEM_TOTAL_DISK_SIZE=%s"
"&NETDATA_PROTOCOL_VERSION=%s"
HTTP_1_1 HTTP_ENDL
"User-Agent: %s/%s\r\n"
"Accept: */*\r\n\r\n"
, host->rrdpush_send_api_key
, rrdhost_hostname(host)
, rrdhost_registry_hostname(host)
, host->machine_guid
, default_rrd_update_every
, rrdhost_os(host)
, rrdhost_timezone(host)
, rrdhost_abbrev_timezone(host)
, host->utc_offset
, host->sender->hops
, host->system_info->ml_capable
, host->system_info->ml_enabled
, host->system_info->mc_version
, s->capabilities
, (host->system_info->cloud_provider_type) ? host->system_info->cloud_provider_type : ""
, (host->system_info->cloud_instance_type) ? host->system_info->cloud_instance_type : ""
, (host->system_info->cloud_instance_region) ? host->system_info->cloud_instance_region : ""
, se.os_name
, se.os_id
, (host->system_info->host_os_id_like) ? host->system_info->host_os_id_like : ""
, se.os_version
, (host->system_info->host_os_version_id) ? host->system_info->host_os_version_id : ""
, (host->system_info->host_os_detection) ? host->system_info->host_os_detection : ""
, (host->system_info->is_k8s_node) ? host->system_info->is_k8s_node : ""
, se.kernel_name
, se.kernel_version
, (host->system_info->architecture) ? host->system_info->architecture : ""
, (host->system_info->virtualization) ? host->system_info->virtualization : ""
, (host->system_info->virt_detection) ? host->system_info->virt_detection : ""
, (host->system_info->container) ? host->system_info->container : ""
, (host->system_info->container_detection) ? host->system_info->container_detection : ""
, (host->system_info->container_os_name) ? host->system_info->container_os_name : ""
, (host->system_info->container_os_id) ? host->system_info->container_os_id : ""
, (host->system_info->container_os_id_like) ? host->system_info->container_os_id_like : ""
, (host->system_info->container_os_version) ? host->system_info->container_os_version : ""
, (host->system_info->container_os_version_id) ? host->system_info->container_os_version_id : ""
, (host->system_info->container_os_detection) ? host->system_info->container_os_detection : ""
, (host->system_info->host_cores) ? host->system_info->host_cores : ""
, (host->system_info->host_cpu_freq) ? host->system_info->host_cpu_freq : ""
, (host->system_info->host_ram_total) ? host->system_info->host_ram_total : ""
, (host->system_info->host_disk_space) ? host->system_info->host_disk_space : ""
, STREAMING_PROTOCOL_VERSION
, rrdhost_program_name(host)
, rrdhost_program_version(host)
);
http[eol] = 0x00;
rrdpush_clean_encoded(&se);
if(!rrdpush_sender_connect_ssl(s))
return false;
if (s->parent_using_h2o && rrdpush_http_upgrade_prelude(host, s)) {
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CANT_UPGRADE_CONNECTION),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION);
rrdpush_sender_thread_close_socket(host);
host->destination->reason = STREAM_HANDSHAKE_ERROR_HTTP_UPGRADE;
host->destination->postpone_reconnection_until = now_realtime_sec() + 1 * 60;
return false;
}
ssize_t len = (ssize_t)strlen(http);
ssize_t bytes = send_timeout(
#ifdef ENABLE_HTTPS
&host->sender->ssl,
#endif
s->rrdpush_sender_socket,
http,
len,
0,
timeout);
if(bytes <= 0) { // timeout is 0
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_TIMEOUT),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT);
rrdpush_sender_thread_close_socket(host);
nd_log(NDLS_DAEMON, NDLP_ERR,
"STREAM %s [send to %s]: failed to send HTTP header to remote netdata.",
rrdhost_hostname(host), s->connected_to);
host->destination->reason = STREAM_HANDSHAKE_ERROR_SEND_TIMEOUT;
host->destination->postpone_reconnection_until = now_realtime_sec() + 1 * 60;
return false;
}
bytes = recv_timeout(
#ifdef ENABLE_HTTPS
&host->sender->ssl,
#endif
s->rrdpush_sender_socket,
http,
HTTP_HEADER_SIZE,
0,
timeout);
if(bytes <= 0) { // timeout is 0
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_TIMEOUT),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT);
rrdpush_sender_thread_close_socket(host);
nd_log(NDLS_DAEMON, NDLP_ERR,
"STREAM %s [send to %s]: remote netdata does not respond.",
rrdhost_hostname(host), s->connected_to);
host->destination->reason = STREAM_HANDSHAKE_ERROR_RECEIVE_TIMEOUT;
host->destination->postpone_reconnection_until = now_realtime_sec() + 30;
return false;
}
if(sock_setnonblock(s->rrdpush_sender_socket) < 0)
nd_log(NDLS_DAEMON, NDLP_WARNING,
"STREAM %s [send to %s]: cannot set non-blocking mode for socket.",
rrdhost_hostname(host), s->connected_to);
sock_setcloexec(s->rrdpush_sender_socket);
if(sock_enlarge_out(s->rrdpush_sender_socket) < 0)
nd_log(NDLS_DAEMON, NDLP_WARNING,
"STREAM %s [send to %s]: cannot enlarge the socket buffer.",
rrdhost_hostname(host), s->connected_to);
http[bytes] = '\0';
if(!rrdpush_sender_validate_response(host, s, http, bytes))
return false;
rrdpush_compression_initialize(s);
log_sender_capabilities(s);
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_TXT(NDF_RESPONSE_CODE, RRDPUSH_STATUS_CONNECTED),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
nd_log(NDLS_DAEMON, NDLP_DEBUG,
"STREAM %s: connected to %s...",
rrdhost_hostname(host), s->connected_to);
return true;
}
static bool attempt_to_connect(struct sender_state *state) {
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_UUID(NDF_MESSAGE_ID, &streaming_to_parent_msgid),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
state->send_attempts = 0;
// reset the bytes we have sent for this session
state->sent_bytes_on_this_connection = 0;
memset(state->sent_bytes_on_this_connection_per_type, 0, sizeof(state->sent_bytes_on_this_connection_per_type));
if(rrdpush_sender_thread_connect_to_parent(state->host, state->default_port, state->timeout, state)) {
// reset the buffer, to properly send charts and metrics
rrdpush_sender_on_connect(state->host);
// send from the beginning
state->begin = 0;
// make sure the next reconnection will be immediate
state->not_connected_loops = 0;
// let the data collection threads know we are ready
rrdhost_flag_set(state->host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED);
rrdpush_sender_after_connect(state->host);
return true;
}
// we couldn't connect
// increase the failed connections counter
state->not_connected_loops++;
// slow re-connection on repeating errors
usec_t now_ut = now_monotonic_usec();
usec_t end_ut = now_ut + USEC_PER_SEC * state->reconnect_delay;
while(now_ut < end_ut) {
if(nd_thread_signaled_to_cancel())
return false;
sleep_usec(100 * USEC_PER_MS); // seconds
now_ut = now_monotonic_usec();
}
return false;
}
// TCP window is open, and we have data to transmit.
static ssize_t attempt_to_send(struct sender_state *s) {
ssize_t ret;
#ifdef NETDATA_INTERNAL_CHECKS
struct circular_buffer *cb = s->buffer;
#endif
sender_lock(s);
char *chunk;
size_t outstanding = cbuffer_next_unsafe(s->buffer, &chunk);
netdata_log_debug(D_STREAM, "STREAM: Sending data. Buffer r=%zu w=%zu s=%zu, next chunk=%zu", cb->read, cb->write, cb->size, outstanding);
#ifdef ENABLE_HTTPS
if(SSL_connection(&s->ssl))
ret = netdata_ssl_write(&s->ssl, chunk, outstanding);
else
ret = send(s->rrdpush_sender_socket, chunk, outstanding, MSG_DONTWAIT);
#else
ret = send(s->rrdpush_sender_socket, chunk, outstanding, MSG_DONTWAIT);
#endif
if (likely(ret > 0)) {
cbuffer_remove_unsafe(s->buffer, ret);
s->sent_bytes_on_this_connection += ret;
s->sent_bytes += ret;
netdata_log_debug(D_STREAM, "STREAM %s [send to %s]: Sent %zd bytes", rrdhost_hostname(s->host), s->connected_to, ret);
}
else if (ret == -1 && (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK))
netdata_log_debug(D_STREAM, "STREAM %s [send to %s]: unavailable after polling POLLOUT", rrdhost_hostname(s->host), s->connected_to);
else if (ret == -1) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR);
netdata_log_debug(D_STREAM, "STREAM: Send failed - closing socket...");
netdata_log_error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", rrdhost_hostname(s->host), s->connected_to, s->sent_bytes_on_this_connection);
rrdpush_sender_thread_close_socket(s->host);
}
else
netdata_log_debug(D_STREAM, "STREAM: send() returned 0 -> no error but no transmission");
replication_recalculate_buffer_used_ratio_unsafe(s);
sender_unlock(s);
return ret;
}
static ssize_t attempt_read(struct sender_state *s) {
ssize_t ret;
#ifdef ENABLE_HTTPS
if (SSL_connection(&s->ssl))
ret = netdata_ssl_read(&s->ssl, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1);
else
ret = recv(s->rrdpush_sender_socket, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1,MSG_DONTWAIT);
#else
ret = recv(s->rrdpush_sender_socket, s->read_buffer + s->read_len, sizeof(s->read_buffer) - s->read_len - 1,MSG_DONTWAIT);
#endif
if (ret > 0) {
s->read_len += ret;
return ret;
}
if (ret < 0 && (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR))
return ret;
#ifdef ENABLE_HTTPS
if (SSL_connection(&s->ssl))
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR);
else
#endif
if (ret == 0 || errno == ECONNRESET) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED);
netdata_log_error("STREAM %s [send to %s]: connection closed by far end.", rrdhost_hostname(s->host), s->connected_to);
}
else {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR);
netdata_log_error("STREAM %s [send to %s]: error during receive (%zd) - closing connection.", rrdhost_hostname(s->host), s->connected_to, ret);
}
rrdpush_sender_thread_close_socket(s->host);
return ret;
}
struct inflight_stream_function {
struct sender_state *sender;
STRING *transaction;
usec_t received_ut;
};
static void stream_execute_function_callback(BUFFER *func_wb, int code, void *data) {
struct inflight_stream_function *tmp = data;
struct sender_state *s = tmp->sender;
if(rrdhost_can_send_definitions_to_parent(s->host)) {
BUFFER *wb = sender_start(s);
pluginsd_function_result_begin_to_buffer(wb
, string2str(tmp->transaction)
, code
, content_type_id2string(func_wb->content_type)
, func_wb->expires);
buffer_fast_strcat(wb, buffer_tostring(func_wb), buffer_strlen(func_wb));
pluginsd_function_result_end_to_buffer(wb);
sender_commit(s, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS);
sender_thread_buffer_free();
internal_error(true, "STREAM %s [send to %s] FUNCTION transaction %s sending back response (%zu bytes, %"PRIu64" usec).",
rrdhost_hostname(s->host), s->connected_to,
string2str(tmp->transaction),
buffer_strlen(func_wb),
now_realtime_usec() - tmp->received_ut);
}
string_freez(tmp->transaction);
buffer_free(func_wb);
freez(tmp);
}
static void stream_execute_function_progress_callback(void *data, size_t done, size_t all) {
struct inflight_stream_function *tmp = data;
struct sender_state *s = tmp->sender;
if(rrdhost_can_send_definitions_to_parent(s->host)) {
BUFFER *wb = sender_start(s);
buffer_sprintf(wb, PLUGINSD_KEYWORD_FUNCTION_PROGRESS " '%s' %zu %zu\n",
string2str(tmp->transaction), done, all);
sender_commit(s, wb, STREAM_TRAFFIC_TYPE_FUNCTIONS);
}
}
static void execute_commands_function(struct sender_state *s, const char *command, const char *transaction, const char *timeout_s, const char *function, BUFFER *payload, const char *access, const char *source) {
worker_is_busy(WORKER_SENDER_JOB_FUNCTION_REQUEST);
nd_log(NDLS_ACCESS, NDLP_INFO, NULL);
if(!transaction || !*transaction || !timeout_s || !*timeout_s || !function || !*function) {
netdata_log_error("STREAM %s [send to %s] %s execution command is incomplete (transaction = '%s', timeout = '%s', function = '%s'). Ignoring it.",
rrdhost_hostname(s->host), s->connected_to,
command,
transaction?transaction:"(unset)",
timeout_s?timeout_s:"(unset)",
function?function:"(unset)");
}
else {
int timeout = str2i(timeout_s);
if(timeout <= 0) timeout = PLUGINS_FUNCTIONS_TIMEOUT_DEFAULT;
struct inflight_stream_function *tmp = callocz(1, sizeof(struct inflight_stream_function));
tmp->received_ut = now_realtime_usec();
tmp->sender = s;
tmp->transaction = string_strdupz(transaction);
BUFFER *wb = buffer_create(1024, &netdata_buffers_statistics.buffers_functions);
int code = rrd_function_run(s->host, wb, timeout,
http_access_from_hex_mapping_old_roles(access), function, false, transaction,
stream_execute_function_callback, tmp,
stream_has_capability(s, STREAM_CAP_PROGRESS) ? stream_execute_function_progress_callback : NULL,
stream_has_capability(s, STREAM_CAP_PROGRESS) ? tmp : NULL,
NULL, NULL, payload, source);
if(code != HTTP_RESP_OK) {
if (!buffer_strlen(wb))
rrd_call_function_error(wb, "Failed to route request to collector", code);
}
}
}
static void cleanup_intercepting_input(struct sender_state *s) {
freez((void *)s->functions.transaction);
freez((void *)s->functions.timeout_s);
freez((void *)s->functions.function);
freez((void *)s->functions.access);
freez((void *)s->functions.source);
buffer_free(s->functions.payload);
s->functions.transaction = NULL;
s->functions.timeout_s = NULL;
s->functions.function = NULL;
s->functions.payload = NULL;
s->functions.access = NULL;
s->functions.source = NULL;
s->functions.intercept_input = false;
}
static void execute_commands_cleanup(struct sender_state *s) {
cleanup_intercepting_input(s);
}
// This is just a placeholder until the gap filling state machine is inserted
void execute_commands(struct sender_state *s) {
worker_is_busy(WORKER_SENDER_JOB_EXECUTE);
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_CB(NDF_REQUEST, line_splitter_reconstruct_line, &s->line),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
char *start = s->read_buffer, *end = &s->read_buffer[s->read_len], *newline;
*end = '\0';
for( ; start < end ; start = newline + 1) {
newline = strchr(start, '\n');
if(!newline) {
if(s->functions.intercept_input) {
buffer_strcat(s->functions.payload, start);
start = end;
}
break;
}
*newline = '\0';
s->line.count++;
if(s->functions.intercept_input) {
if(strcmp(start, PLUGINSD_CALL_FUNCTION_PAYLOAD_END) == 0) {
execute_commands_function(s,
PLUGINSD_CALL_FUNCTION_PAYLOAD_END,
s->functions.transaction, s->functions.timeout_s,
s->functions.function, s->functions.payload,
s->functions.access, s->functions.source);
cleanup_intercepting_input(s);
}
else {
buffer_strcat(s->functions.payload, start);
buffer_fast_charcat(s->functions.payload, '\n');
}
continue;
}
s->line.num_words = quoted_strings_splitter_pluginsd(start, s->line.words, PLUGINSD_MAX_WORDS);
const char *command = get_word(s->line.words, s->line.num_words, 0);
if(command && strcmp(command, PLUGINSD_CALL_FUNCTION) == 0) {
char *transaction = get_word(s->line.words, s->line.num_words, 1);
char *timeout_s = get_word(s->line.words, s->line.num_words, 2);
char *function = get_word(s->line.words, s->line.num_words, 3);
char *access = get_word(s->line.words, s->line.num_words, 4);
char *source = get_word(s->line.words, s->line.num_words, 5);
execute_commands_function(s, command, transaction, timeout_s, function, NULL, access, source);
}
else if(command && strcmp(command, PLUGINSD_CALL_FUNCTION_PAYLOAD_BEGIN) == 0) {
char *transaction = get_word(s->line.words, s->line.num_words, 1);
char *timeout_s = get_word(s->line.words, s->line.num_words, 2);
char *function = get_word(s->line.words, s->line.num_words, 3);
char *access = get_word(s->line.words, s->line.num_words, 4);
char *source = get_word(s->line.words, s->line.num_words, 5);
char *content_type = get_word(s->line.words, s->line.num_words, 6);
s->functions.transaction = strdupz(transaction ? transaction : "");
s->functions.timeout_s = strdupz(timeout_s ? timeout_s : "");
s->functions.function = strdupz(function ? function : "");
s->functions.access = strdupz(access ? access : "");
s->functions.source = strdupz(source ? source : "");
s->functions.payload = buffer_create(0, NULL);
s->functions.payload->content_type = content_type_string2id(content_type);
s->functions.intercept_input = true;
}
else if(command && strcmp(command, PLUGINSD_CALL_FUNCTION_CANCEL) == 0) {
worker_is_busy(WORKER_SENDER_JOB_FUNCTION_REQUEST);
nd_log(NDLS_ACCESS, NDLP_DEBUG, NULL);
char *transaction = get_word(s->line.words, s->line.num_words, 1);
if(transaction && *transaction)
rrd_function_cancel(transaction);
}
else if(command && strcmp(command, PLUGINSD_CALL_FUNCTION_PROGRESS) == 0) {
worker_is_busy(WORKER_SENDER_JOB_FUNCTION_REQUEST);
nd_log(NDLS_ACCESS, NDLP_DEBUG, NULL);
char *transaction = get_word(s->line.words, s->line.num_words, 1);
if(transaction && *transaction)
rrd_function_progress(transaction);
}
else if (command && strcmp(command, PLUGINSD_KEYWORD_REPLAY_CHART) == 0) {
worker_is_busy(WORKER_SENDER_JOB_REPLAY_REQUEST);
nd_log(NDLS_ACCESS, NDLP_DEBUG, NULL);
const char *chart_id = get_word(s->line.words, s->line.num_words, 1);
const char *start_streaming = get_word(s->line.words, s->line.num_words, 2);
const char *after = get_word(s->line.words, s->line.num_words, 3);
const char *before = get_word(s->line.words, s->line.num_words, 4);
if (!chart_id || !start_streaming || !after || !before) {
netdata_log_error("STREAM %s [send to %s] %s command is incomplete"
" (chart=%s, start_streaming=%s, after=%s, before=%s)",
rrdhost_hostname(s->host), s->connected_to,
command,
chart_id ? chart_id : "(unset)",
start_streaming ? start_streaming : "(unset)",
after ? after : "(unset)",
before ? before : "(unset)");
}
else {
replication_add_request(s, chart_id,
strtoll(after, NULL, 0),
strtoll(before, NULL, 0),
!strcmp(start_streaming, "true")
);
}
}
else {
netdata_log_error("STREAM %s [send to %s] received unknown command over connection: %s", rrdhost_hostname(s->host), s->connected_to, s->line.words[0]?s->line.words[0]:"(unset)");
}
line_splitter_reset(&s->line);
worker_is_busy(WORKER_SENDER_JOB_EXECUTE);
}
if (start < end) {
memmove(s->read_buffer, start, end-start);
s->read_len = end - start;
}
else {
s->read_buffer[0] = '\0';
s->read_len = 0;
}
}
struct rrdpush_sender_thread_data {
RRDHOST *host;
char *pipe_buffer;
};
static bool rrdpush_sender_pipe_close(RRDHOST *host, int *pipe_fds, bool reopen) {
static netdata_mutex_t mutex = NETDATA_MUTEX_INITIALIZER;
bool ret = true;
netdata_mutex_lock(&mutex);
int new_pipe_fds[2];
if(reopen) {
if(pipe(new_pipe_fds) != 0) {
netdata_log_error("STREAM %s [send]: cannot create required pipe.", rrdhost_hostname(host));
new_pipe_fds[PIPE_READ] = -1;
new_pipe_fds[PIPE_WRITE] = -1;
ret = false;
}
}
int old_pipe_fds[2];
old_pipe_fds[PIPE_READ] = pipe_fds[PIPE_READ];
old_pipe_fds[PIPE_WRITE] = pipe_fds[PIPE_WRITE];
if(reopen) {
pipe_fds[PIPE_READ] = new_pipe_fds[PIPE_READ];
pipe_fds[PIPE_WRITE] = new_pipe_fds[PIPE_WRITE];
}
else {
pipe_fds[PIPE_READ] = -1;
pipe_fds[PIPE_WRITE] = -1;
}
if(old_pipe_fds[PIPE_READ] > 2)
close(old_pipe_fds[PIPE_READ]);
if(old_pipe_fds[PIPE_WRITE] > 2)
close(old_pipe_fds[PIPE_WRITE]);
netdata_mutex_unlock(&mutex);
return ret;
}
void rrdpush_signal_sender_to_wake_up(struct sender_state *s) {
if(unlikely(s->tid == gettid_cached()))
return;
RRDHOST *host = s->host;
int pipe_fd = s->rrdpush_sender_pipe[PIPE_WRITE];
// signal the sender there are more data
if (pipe_fd != -1 && write(pipe_fd, " ", 1) == -1) {
netdata_log_error("STREAM %s [send]: cannot write to internal pipe.", rrdhost_hostname(host));
rrdpush_sender_pipe_close(host, s->rrdpush_sender_pipe, true);
}
}
static bool rrdhost_set_sender(RRDHOST *host) {
if(unlikely(!host->sender)) return false;
bool ret = false;
sender_lock(host->sender);
if(!host->sender->tid) {
rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED | RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
rrdhost_flag_set(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN);
host->rrdpush_sender_connection_counter++;
host->sender->tid = gettid_cached();
host->sender->last_state_since_t = now_realtime_sec();
host->sender->exit.reason = STREAM_HANDSHAKE_NEVER;
ret = true;
}
sender_unlock(host->sender);
rrdpush_reset_destinations_postpone_time(host);
return ret;
}
static void rrdhost_clear_sender___while_having_sender_mutex(RRDHOST *host) {
if(unlikely(!host->sender)) return;
if(host->sender->tid == gettid_cached()) {
host->sender->tid = 0;
host->sender->exit.shutdown = false;
rrdhost_flag_clear(host, RRDHOST_FLAG_RRDPUSH_SENDER_SPAWN | RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED | RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
host->sender->last_state_since_t = now_realtime_sec();
if(host->destination) {
host->destination->since = host->sender->last_state_since_t;
host->destination->reason = host->sender->exit.reason;
}
}
rrdpush_reset_destinations_postpone_time(host);
}
static bool rrdhost_sender_should_exit(struct sender_state *s) {
if(unlikely(nd_thread_signaled_to_cancel())) {
if(!s->exit.reason)
s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN;
return true;
}
if(unlikely(!service_running(SERVICE_STREAMING))) {
if(!s->exit.reason)
s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_NETDATA_EXIT;
return true;
}
if(unlikely(!rrdhost_has_rrdpush_sender_enabled(s->host))) {
if(!s->exit.reason)
s->exit.reason = STREAM_HANDSHAKE_NON_STREAMABLE_HOST;
return true;
}
if(unlikely(s->exit.shutdown)) {
if(!s->exit.reason)
s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_SHUTDOWN;
return true;
}
if(unlikely(rrdhost_flag_check(s->host, RRDHOST_FLAG_ORPHAN))) {
if(!s->exit.reason)
s->exit.reason = STREAM_HANDSHAKE_DISCONNECT_ORPHAN_HOST;
return true;
}
return false;
}
static void rrdpush_sender_thread_cleanup_callback(void *pptr) {
struct rrdpush_sender_thread_data *s = CLEANUP_FUNCTION_GET_PTR(pptr);
if(!s) return;
worker_unregister();
RRDHOST *host = s->host;
sender_lock(host->sender);
netdata_log_info("STREAM %s [send]: sending thread exits %s",
rrdhost_hostname(host),
host->sender->exit.reason != STREAM_HANDSHAKE_NEVER ? stream_handshake_error_to_string(host->sender->exit.reason) : "");
rrdpush_sender_thread_close_socket(host);
rrdpush_sender_pipe_close(host, host->sender->rrdpush_sender_pipe, false);
execute_commands_cleanup(host->sender);
rrdhost_clear_sender___while_having_sender_mutex(host);
#ifdef NETDATA_LOG_STREAM_SENDER
if(host->sender->stream_log_fp) {
fclose(host->sender->stream_log_fp);
host->sender->stream_log_fp = NULL;
}
#endif
sender_unlock(host->sender);
freez(s->pipe_buffer);
freez(s);
}
void rrdpush_initialize_ssl_ctx(RRDHOST *host __maybe_unused) {
#ifdef ENABLE_HTTPS
static SPINLOCK sp = NETDATA_SPINLOCK_INITIALIZER;
spinlock_lock(&sp);
if(netdata_ssl_streaming_sender_ctx || !host) {
spinlock_unlock(&sp);
return;
}
for(struct rrdpush_destinations *d = host->destinations; d ; d = d->next) {
if (d->ssl) {
// we need to initialize SSL
netdata_ssl_initialize_ctx(NETDATA_SSL_STREAMING_SENDER_CTX);
ssl_security_location_for_context(netdata_ssl_streaming_sender_ctx, netdata_ssl_ca_file, netdata_ssl_ca_path);
// stop the loop
break;
}
}
spinlock_unlock(&sp);
#endif
}
static bool stream_sender_log_capabilities(BUFFER *wb, void *ptr) {
struct sender_state *state = ptr;
if(!state)
return false;
stream_capabilities_to_string(wb, state->capabilities);
return true;
}
static bool stream_sender_log_transport(BUFFER *wb, void *ptr) {
struct sender_state *state = ptr;
if(!state)
return false;
#ifdef ENABLE_HTTPS
buffer_strcat(wb, SSL_connection(&state->ssl) ? "https" : "http");
#else
buffer_strcat(wb, "http");
#endif
return true;
}
static bool stream_sender_log_dst_ip(BUFFER *wb, void *ptr) {
struct sender_state *state = ptr;
if(!state || state->rrdpush_sender_socket == -1)
return false;
SOCKET_PEERS peers = socket_peers(state->rrdpush_sender_socket);
buffer_strcat(wb, peers.peer.ip);
return true;
}
static bool stream_sender_log_dst_port(BUFFER *wb, void *ptr) {
struct sender_state *state = ptr;
if(!state || state->rrdpush_sender_socket == -1)
return false;
SOCKET_PEERS peers = socket_peers(state->rrdpush_sender_socket);
buffer_print_uint64(wb, peers.peer.port);
return true;
}
void *rrdpush_sender_thread(void *ptr) {
struct sender_state *s = ptr;
ND_LOG_STACK lgs[] = {
ND_LOG_FIELD_STR(NDF_NIDL_NODE, s->host->hostname),
ND_LOG_FIELD_CB(NDF_DST_IP, stream_sender_log_dst_ip, s),
ND_LOG_FIELD_CB(NDF_DST_PORT, stream_sender_log_dst_port, s),
ND_LOG_FIELD_CB(NDF_DST_TRANSPORT, stream_sender_log_transport, s),
ND_LOG_FIELD_CB(NDF_SRC_CAPABILITIES, stream_sender_log_capabilities, s),
ND_LOG_FIELD_END(),
};
ND_LOG_STACK_PUSH(lgs);
worker_register("STREAMSND");
worker_register_job_name(WORKER_SENDER_JOB_CONNECT, "connect");
worker_register_job_name(WORKER_SENDER_JOB_PIPE_READ, "pipe read");
worker_register_job_name(WORKER_SENDER_JOB_SOCKET_RECEIVE, "receive");
worker_register_job_name(WORKER_SENDER_JOB_EXECUTE, "execute");
worker_register_job_name(WORKER_SENDER_JOB_SOCKET_SEND, "send");
// disconnection reasons
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT, "disconnect timeout");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR, "disconnect poll error");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR, "disconnect socket error");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_OVERFLOW, "disconnect overflow");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SSL_ERROR, "disconnect ssl error");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_PARENT_CLOSED, "disconnect parent closed");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_RECEIVE_ERROR, "disconnect receive error");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_SEND_ERROR, "disconnect send error");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_NO_COMPRESSION, "disconnect no compression");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_BAD_HANDSHAKE, "disconnect bad handshake");
worker_register_job_name(WORKER_SENDER_JOB_DISCONNECT_CANT_UPGRADE_CONNECTION, "disconnect cant upgrade");
worker_register_job_name(WORKER_SENDER_JOB_REPLAY_REQUEST, "replay request");
worker_register_job_name(WORKER_SENDER_JOB_FUNCTION_REQUEST, "function");
worker_register_job_custom_metric(WORKER_SENDER_JOB_BUFFER_RATIO, "used buffer ratio", "%", WORKER_METRIC_ABSOLUTE);
worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_RECEIVED, "bytes received", "bytes/s", WORKER_METRIC_INCREMENT);
worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_SENT, "bytes sent", "bytes/s", WORKER_METRIC_INCREMENT);
worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_COMPRESSED, "bytes compressed", "bytes/s", WORKER_METRIC_INCREMENTAL_TOTAL);
worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_UNCOMPRESSED, "bytes uncompressed", "bytes/s", WORKER_METRIC_INCREMENTAL_TOTAL);
worker_register_job_custom_metric(WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO, "cumulative compression savings ratio", "%", WORKER_METRIC_ABSOLUTE);
worker_register_job_custom_metric(WORKER_SENDER_JOB_REPLAY_DICT_SIZE, "replication dict entries", "entries", WORKER_METRIC_ABSOLUTE);
if(!rrdhost_has_rrdpush_sender_enabled(s->host) || !s->host->rrdpush_send_destination ||
!*s->host->rrdpush_send_destination || !s->host->rrdpush_send_api_key ||
!*s->host->rrdpush_send_api_key) {
netdata_log_error("STREAM %s [send]: thread created (task id %d), but host has streaming disabled.",
rrdhost_hostname(s->host), gettid_cached());
return NULL;
}
if(!rrdhost_set_sender(s->host)) {
netdata_log_error("STREAM %s [send]: thread created (task id %d), but there is another sender running for this host.",
rrdhost_hostname(s->host), gettid_cached());
return NULL;
}
rrdpush_initialize_ssl_ctx(s->host);
netdata_log_info("STREAM %s [send]: thread created (task id %d)", rrdhost_hostname(s->host), gettid_cached());
s->timeout = (int)appconfig_get_number(
&stream_config, CONFIG_SECTION_STREAM, "timeout seconds", 600);
s->default_port = (int)appconfig_get_number(
&stream_config, CONFIG_SECTION_STREAM, "default port", 19999);
s->buffer->max_size = (size_t)appconfig_get_number(
&stream_config, CONFIG_SECTION_STREAM, "buffer size bytes", 1024 * 1024 * 10);
s->reconnect_delay = (unsigned int)appconfig_get_number(
&stream_config, CONFIG_SECTION_STREAM, "reconnect delay seconds", 5);
remote_clock_resync_iterations = (unsigned int)appconfig_get_number(
&stream_config, CONFIG_SECTION_STREAM,
"initial clock resync iterations",
remote_clock_resync_iterations); // TODO: REMOVE FOR SLEW / GAPFILLING
s->parent_using_h2o = appconfig_get_boolean(
&stream_config, CONFIG_SECTION_STREAM, "parent using h2o", false);
// initialize rrdpush globals
rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_CONNECTED);
int pipe_buffer_size = 10 * 1024;
#ifdef F_GETPIPE_SZ
pipe_buffer_size = fcntl(s->rrdpush_sender_pipe[PIPE_READ], F_GETPIPE_SZ);
#endif
if(pipe_buffer_size < 10 * 1024)
pipe_buffer_size = 10 * 1024;
if(!rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true)) {
netdata_log_error("STREAM %s [send]: cannot create inter-thread communication pipe. Disabling streaming.",
rrdhost_hostname(s->host));
return NULL;
}
struct rrdpush_sender_thread_data *thread_data = callocz(1, sizeof(struct rrdpush_sender_thread_data));
thread_data->pipe_buffer = mallocz(pipe_buffer_size);
thread_data->host = s->host;
CLEANUP_FUNCTION_REGISTER(rrdpush_sender_thread_cleanup_callback) cleanup_ptr = thread_data;
size_t iterations = 0;
time_t now_s = now_monotonic_sec();
while(!rrdhost_sender_should_exit(s)) {
iterations++;
// The connection attempt blocks (after which we use the socket in nonblocking)
if(unlikely(s->rrdpush_sender_socket == -1)) {
worker_is_busy(WORKER_SENDER_JOB_CONNECT);
now_s = now_monotonic_sec();
rrdpush_sender_cbuffer_recreate_timed(s, now_s, false, true);
execute_commands_cleanup(s);
rrdhost_flag_clear(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
s->flags &= ~SENDER_FLAG_OVERFLOW;
s->read_len = 0;
s->buffer->read = 0;
s->buffer->write = 0;
if(!attempt_to_connect(s))
continue;
if(rrdhost_sender_should_exit(s))
break;
now_s = s->last_traffic_seen_t = now_monotonic_sec();
rrdpush_send_claimed_id(s->host);
rrdpush_send_host_labels(s->host);
rrdpush_send_global_functions(s->host);
s->replication.oldest_request_after_t = 0;
rrdhost_flag_set(s->host, RRDHOST_FLAG_RRDPUSH_SENDER_READY_4_METRICS);
nd_log(NDLS_DAEMON, NDLP_DEBUG,
"STREAM %s [send to %s]: enabling metrics streaming...",
rrdhost_hostname(s->host), s->connected_to);
continue;
}
if(iterations % 1000 == 0)
now_s = now_monotonic_sec();
// If the TCP window never opened then something is wrong, restart connection
if(unlikely(now_s - s->last_traffic_seen_t > s->timeout &&
!rrdpush_sender_pending_replication_requests(s) &&
!rrdpush_sender_replicating_charts(s)
)) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_TIMEOUT);
netdata_log_error("STREAM %s [send to %s]: could not send metrics for %d seconds - closing connection - we have sent %zu bytes on this connection via %zu send attempts.", rrdhost_hostname(s->host), s->connected_to, s->timeout, s->sent_bytes_on_this_connection, s->send_attempts);
rrdpush_sender_thread_close_socket(s->host);
continue;
}
sender_lock(s);
size_t outstanding = cbuffer_next_unsafe(s->buffer, NULL);
size_t available = cbuffer_available_size_unsafe(s->buffer);
if (unlikely(!outstanding)) {
rrdpush_sender_pipe_clear_pending_data(s);
rrdpush_sender_cbuffer_recreate_timed(s, now_s, true, false);
}
if(s->compressor.initialized) {
size_t bytes_uncompressed = s->compressor.sender_locked.total_uncompressed;
size_t bytes_compressed = s->compressor.sender_locked.total_compressed + s->compressor.sender_locked.total_compressions * sizeof(rrdpush_signature_t);
NETDATA_DOUBLE ratio = 100.0 - ((NETDATA_DOUBLE)bytes_compressed * 100.0 / (NETDATA_DOUBLE)bytes_uncompressed);
worker_set_metric(WORKER_SENDER_JOB_BYTES_UNCOMPRESSED, (NETDATA_DOUBLE)bytes_uncompressed);
worker_set_metric(WORKER_SENDER_JOB_BYTES_COMPRESSED, (NETDATA_DOUBLE)bytes_compressed);
worker_set_metric(WORKER_SENDER_JOB_BYTES_COMPRESSION_RATIO, ratio);
}
sender_unlock(s);
worker_set_metric(WORKER_SENDER_JOB_BUFFER_RATIO, (NETDATA_DOUBLE)(s->buffer->max_size - available) * 100.0 / (NETDATA_DOUBLE)s->buffer->max_size);
if(outstanding)
s->send_attempts++;
if(unlikely(s->rrdpush_sender_pipe[PIPE_READ] == -1)) {
if(!rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true)) {
netdata_log_error("STREAM %s [send]: cannot create inter-thread communication pipe. Disabling streaming.",
rrdhost_hostname(s->host));
rrdpush_sender_thread_close_socket(s->host);
break;
}
}
worker_is_idle();
// Wait until buffer opens in the socket or a rrdset_done_push wakes us
enum {
Collector = 0,
Socket = 1,
};
struct pollfd fds[2] = {
[Collector] = {
.fd = s->rrdpush_sender_pipe[PIPE_READ],
.events = POLLIN,
.revents = 0,
},
[Socket] = {
.fd = s->rrdpush_sender_socket,
.events = POLLIN | (outstanding ? POLLOUT : 0 ),
.revents = 0,
}
};
int poll_rc = poll(fds, 2, 50); // timeout in milliseconds
netdata_log_debug(D_STREAM, "STREAM: poll() finished collector=%d socket=%d (current chunk %zu bytes)...",
fds[Collector].revents, fds[Socket].revents, outstanding);
if(unlikely(rrdhost_sender_should_exit(s)))
break;
internal_error(fds[Collector].fd != s->rrdpush_sender_pipe[PIPE_READ],
"STREAM %s [send to %s]: pipe changed after poll().", rrdhost_hostname(s->host), s->connected_to);
internal_error(fds[Socket].fd != s->rrdpush_sender_socket,
"STREAM %s [send to %s]: socket changed after poll().", rrdhost_hostname(s->host), s->connected_to);
// Spurious wake-ups without error - loop again
if (poll_rc == 0 || ((poll_rc == -1) && (errno == EAGAIN || errno == EINTR))) {
netdata_log_debug(D_STREAM, "Spurious wakeup");
now_s = now_monotonic_sec();
continue;
}
// Only errors from poll() are internal, but try restarting the connection
if(unlikely(poll_rc == -1)) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_POLL_ERROR);
netdata_log_error("STREAM %s [send to %s]: failed to poll(). Closing socket.", rrdhost_hostname(s->host), s->connected_to);
rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true);
rrdpush_sender_thread_close_socket(s->host);
continue;
}
// If we have data and have seen the TCP window open then try to close it by a transmission.
if(likely(outstanding && (fds[Socket].revents & POLLOUT))) {
worker_is_busy(WORKER_SENDER_JOB_SOCKET_SEND);
ssize_t bytes = attempt_to_send(s);
if(bytes > 0) {
s->last_traffic_seen_t = now_monotonic_sec();
worker_set_metric(WORKER_SENDER_JOB_BYTES_SENT, (NETDATA_DOUBLE)bytes);
}
}
// If the collector woke us up then empty the pipe to remove the signal
if (fds[Collector].revents & (POLLIN|POLLPRI)) {
worker_is_busy(WORKER_SENDER_JOB_PIPE_READ);
netdata_log_debug(D_STREAM, "STREAM: Data added to send buffer (current buffer chunk %zu bytes)...", outstanding);
if (read(fds[Collector].fd, thread_data->pipe_buffer, pipe_buffer_size) == -1)
netdata_log_error("STREAM %s [send to %s]: cannot read from internal pipe.", rrdhost_hostname(s->host), s->connected_to);
}
// Read as much as possible to fill the buffer, split into full lines for execution.
if (fds[Socket].revents & POLLIN) {
worker_is_busy(WORKER_SENDER_JOB_SOCKET_RECEIVE);
ssize_t bytes = attempt_read(s);
if(bytes > 0) {
s->last_traffic_seen_t = now_monotonic_sec();
worker_set_metric(WORKER_SENDER_JOB_BYTES_RECEIVED, (NETDATA_DOUBLE)bytes);
}
}
if(unlikely(s->read_len))
execute_commands(s);
if(unlikely(fds[Collector].revents & (POLLERR|POLLHUP|POLLNVAL))) {
char *error = NULL;
if (unlikely(fds[Collector].revents & POLLERR))
error = "pipe reports errors (POLLERR)";
else if (unlikely(fds[Collector].revents & POLLHUP))
error = "pipe closed (POLLHUP)";
else if (unlikely(fds[Collector].revents & POLLNVAL))
error = "pipe is invalid (POLLNVAL)";
if(error) {
rrdpush_sender_pipe_close(s->host, s->rrdpush_sender_pipe, true);
netdata_log_error("STREAM %s [send to %s]: restarting internal pipe: %s.",
rrdhost_hostname(s->host), s->connected_to, error);
}
}
if(unlikely(fds[Socket].revents & (POLLERR|POLLHUP|POLLNVAL))) {
char *error = NULL;
if (unlikely(fds[Socket].revents & POLLERR))
error = "socket reports errors (POLLERR)";
else if (unlikely(fds[Socket].revents & POLLHUP))
error = "connection closed by remote end (POLLHUP)";
else if (unlikely(fds[Socket].revents & POLLNVAL))
error = "connection is invalid (POLLNVAL)";
if(unlikely(error)) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_SOCKET_ERROR);
netdata_log_error("STREAM %s [send to %s]: restarting connection: %s - %zu bytes transmitted.",
rrdhost_hostname(s->host), s->connected_to, error, s->sent_bytes_on_this_connection);
rrdpush_sender_thread_close_socket(s->host);
}
}
// protection from overflow
if(unlikely(s->flags & SENDER_FLAG_OVERFLOW)) {
worker_is_busy(WORKER_SENDER_JOB_DISCONNECT_OVERFLOW);
errno = 0;
netdata_log_error("STREAM %s [send to %s]: buffer full (allocated %zu bytes) after sending %zu bytes. Restarting connection",
rrdhost_hostname(s->host), s->connected_to, s->buffer->size, s->sent_bytes_on_this_connection);
rrdpush_sender_thread_close_socket(s->host);
}
worker_set_metric(WORKER_SENDER_JOB_REPLAY_DICT_SIZE, (NETDATA_DOUBLE) dictionary_entries(s->replication.requests));
}
return NULL;
}