#include "common.h"
-#define PIPE_READ 0
-#define PIPE_WRITE 1
+/*
+ * rrdpush
+ *
+ * 3 threads are involved for all stream operations
+ *
+ * 1. a random data collection thread, calling rrdset_done_push()
+ * this is called for each chart.
+ *
+ * the output of this work is kept in a BUFFER in RRDHOST
+ * the sender thread is signalled via a pipe (also in RRDHOST)
+ *
+ * 2. a sender thread running at the sending netdata
+ * this is spawned automatically on the first chart to be pushed
+ *
+ * It tries to push the metrics to the remote netdata, as fast
+ * as possible (i.e. immediately after they are collected).
+ *
+ * 3. a receiver thread, running at the receiving netdata
+ * this is spawned automatically when the sender connects to
+ * the receiver.
+ *
+ */
+
+#define START_STREAMING_PROMPT "Hit me baby, push them over..."
+
+int default_rrdpush_enabled = 0;
+char *default_rrdpush_destination = NULL;
+char *default_rrdpush_api_key = NULL;
+
+int rrdpush_init() {
+ default_rrdpush_enabled = appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "enabled", default_rrdpush_enabled);
+ default_rrdpush_destination = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "destination", "");
+ default_rrdpush_api_key = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "api key", "");
+ rrdhost_free_orphan_time = config_get_number(CONFIG_SECTION_GLOBAL, "cleanup orphan hosts after seconds", rrdhost_free_orphan_time);
+
+ if(default_rrdpush_enabled && (!default_rrdpush_destination || !*default_rrdpush_destination || !default_rrdpush_api_key || !*default_rrdpush_api_key)) {
+ error("STREAM [send]: cannot enable sending thread - information is missing.");
+ default_rrdpush_enabled = 0;
+ }
-int rrdpush_pipe[2];
+ return default_rrdpush_enabled;
+}
-static BUFFER *rrdpush_buffer = NULL;
-static pthread_mutex_t rrdpush_mutex = PTHREAD_MUTEX_INITIALIZER;
-static volatile RRDHOST *last_host = NULL;
-static volatile int rrdpush_connected = 0;
+#define CONNECTED_TO_SIZE 100
-static inline void rrdpush_lock() {
- pthread_mutex_lock(&rrdpush_mutex);
-}
+// data collection happens from multiple threads
+// each of these threads calls rrdset_done()
+// which in turn calls rrdset_done_push()
+// which uses this pipe to notify the streaming thread
+// that there are more data ready to be sent
+#define PIPE_READ 0
+#define PIPE_WRITE 1
-static inline void rrdpush_unlock() {
- pthread_mutex_unlock(&rrdpush_mutex);
-}
+// to have the remote netdata re-sync the charts
+// to its current clock, we send for this many
+// iterations a BEGIN line without microseconds
+// this is for the first iterations of each chart
+static unsigned int remote_clock_resync_iterations = 60;
+
+#define rrdpush_lock(host) pthread_mutex_lock(&((host)->rrdpush_mutex))
+#define rrdpush_unlock(host) pthread_mutex_unlock(&((host)->rrdpush_mutex))
+// checks if the current chart definition has been sent
static inline int need_to_send_chart_definition(RRDSET *st) {
RRDDIM *rd;
rrddim_foreach_read(rd, st)
- if(!rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
+ if(!rd->exposed)
return 1;
-
- // fprintf(stderr, "NOT Sending CHART '%s' '%s'\n", st->id, st->name);
return 0;
}
+// sends the current chart definition
static inline void send_chart_definition(RRDSET *st) {
- // fprintf(stderr, "Sending CHART '%s' '%s'\n", st->id, st->name);
-
- buffer_sprintf(rrdpush_buffer, "CHART '%s' '%s' '%s' '%s' '%s' '%s' '%s' %ld %d\n"
+ buffer_sprintf(st->rrdhost->rrdpush_buffer, "CHART '%s' '%s' '%s' '%s' '%s' '%s' '%s' %ld %d\n"
, st->id
, st->name
, st->title
RRDDIM *rd;
rrddim_foreach_read(rd, st) {
- buffer_sprintf(rrdpush_buffer, "DIMENSION '%s' '%s' '%s' " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " '%s %s'\n"
+ buffer_sprintf(st->rrdhost->rrdpush_buffer, "DIMENSION '%s' '%s' '%s' " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " '%s %s'\n"
, rd->id
, rd->name
, rrd_algorithm_name(rd->algorithm)
, rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?"hidden":""
, rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)?"noreset":""
);
- rrddim_flag_set(rd, RRDDIM_FLAG_EXPOSED);
+ rd->exposed = 1;
}
}
+// sends the current chart dimensions
static inline void send_chart_metrics(RRDSET *st) {
- buffer_sprintf(rrdpush_buffer, "BEGIN %s %llu\n", st->id, st->usec_since_last_update);
+ buffer_sprintf(st->rrdhost->rrdpush_buffer, "BEGIN %s %llu\n", st->id, (st->counter_done > remote_clock_resync_iterations)?st->usec_since_last_update:0);
RRDDIM *rd;
rrddim_foreach_read(rd, st) {
- if(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
- buffer_sprintf(rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n"
+ if(rd->updated && rd->exposed)
+ buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n"
, rd->id
, rd->collected_value
);
}
- buffer_strcat(rrdpush_buffer, "END\n");
+ buffer_strcat(st->rrdhost->rrdpush_buffer, "END\n");
}
-static void reset_all_charts(void) {
- rrd_rdlock();
+void rrdpush_sender_thread_spawn(RRDHOST *host);
- RRDHOST *host;
- rrdhost_foreach_read(host) {
- rrdhost_rdlock(host);
+void rrdset_done_push(RRDSET *st) {
+ RRDHOST *host = st->rrdhost;
- RRDSET *st;
- rrdset_foreach_read(st, host) {
- rrdset_rdlock(st);
+ if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED)))
+ return;
- RRDDIM *rd;
- rrddim_foreach_read(rd, st)
- rrddim_flag_clear(rd, RRDDIM_FLAG_EXPOSED);
+ rrdpush_lock(host);
- rrdset_unlock(st);
- }
- rrdhost_unlock(host);
+ if(unlikely(host->rrdpush_enabled && !host->rrdpush_spawn))
+ rrdpush_sender_thread_spawn(host);
+
+ if(unlikely(!host->rrdpush_buffer || !host->rrdpush_connected)) {
+ if(unlikely(!host->rrdpush_error_shown))
+ error("STREAM %s [send]: not ready - discarding collected metrics.", host->hostname);
+
+ host->rrdpush_error_shown = 1;
+
+ rrdpush_unlock(host);
+ return;
+ }
+ else if(unlikely(host->rrdpush_error_shown)) {
+ info("STREAM %s [send]: ready - sending metrics...", host->hostname);
+ host->rrdpush_error_shown = 0;
}
- rrd_unlock();
- last_host = NULL;
+ if(need_to_send_chart_definition(st))
+ send_chart_definition(st);
+
+ send_chart_metrics(st);
+
+ // signal the sender there are more data
+ if(write(host->rrdpush_pipe[PIPE_WRITE], " ", 1) == -1)
+ error("STREAM %s [send]: cannot write to internal pipe", host->hostname);
+
+ rrdpush_unlock(host);
}
-void rrdset_done_push(RRDSET *st) {
- static int error_shown = 0;
+// ----------------------------------------------------------------------------
+// rrdpush sender thread
- if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED)))
- return;
+// 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) {
+ rrdhost_rdlock(host);
- if(unlikely(!rrdpush_buffer || !rrdpush_connected)) {
- if(!error_shown)
- error("PUSH: not ready - discarding collected metrics.");
+ RRDSET *st;
+ rrdset_foreach_read(st, host) {
- error_shown = 1;
- return;
+ // make it re-align the current time
+ // on the remote host
+ st->counter_done = 0;
+
+ rrdset_rdlock(st);
+
+ RRDDIM *rd;
+ rrddim_foreach_read(rd, st)
+ rd->exposed = 0;
+
+ rrdset_unlock(st);
}
- error_shown = 0;
- rrdpush_lock();
- rrdset_rdlock(st);
+ rrdhost_unlock(host);
+}
+
+static inline void rrdpush_sender_thread_data_flush(RRDHOST *host) {
+ rrdpush_lock(host);
+
+ if(buffer_strlen(host->rrdpush_buffer))
+ error("STREAM %s [send]: discarding %zu bytes of metrics already in the buffer.", host->hostname, buffer_strlen(host->rrdpush_buffer));
+
+ buffer_flush(host->rrdpush_buffer);
+
+ rrdpush_sender_thread_reset_all_charts(host);
- if(st->rrdhost != last_host) {
- buffer_sprintf(rrdpush_buffer, "HOST '%s' '%s'\n", st->rrdhost->machine_guid, st->rrdhost->hostname);
- last_host = st->rrdhost;
+ rrdpush_unlock(host);
+}
+
+static void rrdpush_sender_thread_cleanup_locked_all(RRDHOST *host) {
+ host->rrdpush_connected = 0;
+
+ if(host->rrdpush_socket != -1) {
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
}
- if(need_to_send_chart_definition(st))
- send_chart_definition(st);
+ // close the pipe
+ if(host->rrdpush_pipe[PIPE_READ] != -1) {
+ close(host->rrdpush_pipe[PIPE_READ]);
+ host->rrdpush_pipe[PIPE_READ] = -1;
+ }
- send_chart_metrics(st);
+ if(host->rrdpush_pipe[PIPE_WRITE] != -1) {
+ close(host->rrdpush_pipe[PIPE_WRITE]);
+ host->rrdpush_pipe[PIPE_WRITE] = -1;
+ }
- // signal the sender there are more data
- if(write(rrdpush_pipe[PIPE_WRITE], " ", 1) == -1)
- error("Cannot write to internal pipe");
+ buffer_free(host->rrdpush_buffer);
+ host->rrdpush_buffer = NULL;
+
+ host->rrdpush_spawn = 0;
- rrdset_unlock(st);
- rrdpush_unlock();
+ rrdhost_flag_set(host, RRDHOST_ORPHAN);
}
-static inline void rrdpush_flush(void) {
- rrdpush_lock();
- if(buffer_strlen(rrdpush_buffer))
- error("PUSH: discarding %zu bytes of metrics data already in the buffer.", buffer_strlen(rrdpush_buffer));
+void rrdpush_sender_thread_stop(RRDHOST *host) {
+ rrdpush_lock(host);
+ rrdhost_wrlock(host);
+
+ if(host->rrdpush_spawn) {
+ info("STREAM %s [send]: stopping sending thread...", host->hostname);
+ pthread_cancel(host->rrdpush_thread);
+ rrdpush_sender_thread_cleanup_locked_all(host);
+ }
- buffer_flush(rrdpush_buffer);
- reset_all_charts();
- last_host = NULL;
- rrdpush_unlock();
+ rrdhost_unlock(host);
+ rrdpush_unlock(host);
}
-void *central_netdata_push_thread(void *ptr) {
- struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
+void *rrdpush_sender_thread(void *ptr) {
+ RRDHOST *host = (RRDHOST *)ptr;
- info("Central netdata push thread created with task id %d", gettid());
+ info("STREAM %s [send]: thread created (task id %d)", host->hostname, gettid());
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
- error("Cannot set pthread cancel type to DEFERRED.");
+ error("STREAM %s [send]: cannot set pthread cancel type to DEFERRED.", host->hostname);
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
- error("Cannot set pthread cancel state to ENABLE.");
+ error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
+ int timeout = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "timeout seconds", 60);
+ int default_port = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "default port", 19999);
+ size_t max_size = (size_t)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "buffer size bytes", 1024 * 1024);
+ unsigned int 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);
+ char connected_to[CONNECTED_TO_SIZE + 1] = "";
- rrdpush_buffer = buffer_create(1);
+ if(!host->rrdpush_enabled || !host->rrdpush_destination || !*host->rrdpush_destination || !host->rrdpush_api_key || !*host->rrdpush_api_key)
+ goto cleanup;
- if(pipe(rrdpush_pipe) == -1)
- fatal("Cannot create required pipe.");
+ // initialize rrdpush globals
+ host->rrdpush_buffer = buffer_create(1);
+ host->rrdpush_connected = 0;
+ if(pipe(host->rrdpush_pipe) == -1) fatal("STREAM %s [send]: cannot create required pipe.", host->hostname);
- struct timeval tv = {
- .tv_sec = 60,
- .tv_usec = 0
- };
-
- rrdpush_connected = 0;
+ // initialize local variables
size_t begin = 0;
- size_t max_size = 1024 * 1024;
size_t reconnects_counter = 0;
size_t sent_bytes = 0;
size_t sent_connection = 0;
- int sock = -1;
+
+ struct timeval tv = {
+ .tv_sec = timeout,
+ .tv_usec = 0
+ };
struct pollfd fds[2], *ifd, *ofd;
+ nfds_t fdmax;
ifd = &fds[0];
ofd = &fds[1];
- for(;;) {
- if(netdata_exit) break;
+ for(; host->rrdpush_enabled && !netdata_exit ;) {
- if(unlikely(sock == -1)) {
- rrdpush_connected = 0;
+ if(unlikely(host->rrdpush_socket == -1)) {
+ // stop appending data into rrdpush_buffer
+ // they will be lost, so there is no point to do it
+ host->rrdpush_connected = 0;
- info("PUSH: connecting to central netdata at: %s", central_netdata_to_push_data);
- sock = connect_to_one_of(central_netdata_to_push_data, 19999, &tv, &reconnects_counter);
+ info("STREAM %s [send to %s]: connecting...", host->hostname, host->rrdpush_destination);
+ host->rrdpush_socket = connect_to_one_of(host->rrdpush_destination, default_port, &tv, &reconnects_counter, connected_to, CONNECTED_TO_SIZE);
- if(unlikely(sock == -1)) {
- error("PUSH: failed to connect to central netdata at: %s", central_netdata_to_push_data);
+ if(unlikely(host->rrdpush_socket == -1)) {
+ error("STREAM %s [send to %s]: failed to connect", host->hostname, host->rrdpush_destination);
+ sleep(reconnect_delay);
continue;
}
- info("PUSH: connected to central netdata at: %s", central_netdata_to_push_data);
+ info("STREAM %s [send to %s]: initializing communication...", host->hostname, connected_to);
char http[1000 + 1];
- snprintfz(http, 1000, "GET /stream?key=%s HTTP/1.1\r\nUser-Agent: netdata-push-service/%s\r\nAccept: */*\r\n\r\n", config_get("global", "central netdata api key", ""), program_version);
- if(send_timeout(sock, http, strlen(http), 0, 60) == -1) {
- close(sock);
- sock = -1;
- error("PUSH: failed to send http header to netdata at: %s", central_netdata_to_push_data);
- sleep(5);
+ snprintfz(http, 1000,
+ "STREAM key=%s&hostname=%s&machine_guid=%s&os=%s&update_every=%d HTTP/1.1\r\n"
+ "User-Agent: netdata-push-service/%s\r\n"
+ "Accept: */*\r\n\r\n"
+ , host->rrdpush_api_key
+ , host->hostname
+ , host->machine_guid
+ , host->os
+ , default_rrd_update_every
+ , program_version
+ );
+
+ if(send_timeout(host->rrdpush_socket, http, strlen(http), 0, timeout) == -1) {
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
+ error("STREAM %s [send to %s]: failed to send http header to netdata", host->hostname, connected_to);
+ sleep(reconnect_delay);
continue;
}
- if(recv_timeout(sock, http, 1000, 0, 60) == -1) {
- close(sock);
- sock = -1;
- error("PUSH: failed to receive OK from netdata at: %s", central_netdata_to_push_data);
- sleep(5);
+ info("STREAM %s [send to %s]: waiting response from remote netdata...", host->hostname, connected_to);
+
+ if(recv_timeout(host->rrdpush_socket, http, 1000, 0, timeout) == -1) {
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
+ error("STREAM %s [send to %s]: failed to initialize communication", host->hostname, connected_to);
+ sleep(reconnect_delay);
continue;
}
- if(strncmp(http, "STREAM", 6)) {
- close(sock);
- sock = -1;
- error("PUSH: netdata servers at %s, did not send STREAM", central_netdata_to_push_data);
- sleep(5);
+ if(strncmp(http, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT))) {
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
+ error("STREAM %s [send to %s]: server is not replying properly.", host->hostname, connected_to);
+ sleep(reconnect_delay);
continue;
}
- if(fcntl(sock, F_SETFL, O_NONBLOCK) < 0)
- error("PUSH: cannot set non-blocking mode for socket.");
+ info("STREAM %s [send to %s]: established communication - sending metrics...", host->hostname, connected_to);
+
+ if(fcntl(host->rrdpush_socket, F_SETFL, O_NONBLOCK) < 0)
+ error("STREAM %s [send to %s]: cannot set non-blocking mode for socket.", host->hostname, connected_to);
- rrdpush_flush();
+ rrdpush_sender_thread_data_flush(host);
sent_connection = 0;
- rrdpush_connected = 1;
+
+ // allow appending data into rrdpush_buffer
+ host->rrdpush_connected = 1;
}
- ifd->fd = rrdpush_pipe[PIPE_READ];
+ ifd->fd = host->rrdpush_pipe[PIPE_READ];
ifd->events = POLLIN;
ifd->revents = 0;
- ofd->fd = sock;
- ofd->events = POLLOUT;
+ ofd->fd = host->rrdpush_socket;
ofd->revents = 0;
-
- nfds_t fdmax = 2;
-
- if(begin < buffer_strlen(rrdpush_buffer))
+ if(begin < buffer_strlen(host->rrdpush_buffer)) {
ofd->events = POLLOUT;
- else
+ fdmax = 2;
+ }
+ else {
ofd->events = 0;
+ fdmax = 1;
+ }
if(netdata_exit) break;
- int retval = poll(fds, fdmax, 60 * 1000);
+ int retval = poll(fds, fdmax, timeout * 1000);
if(netdata_exit) break;
if(unlikely(retval == -1)) {
if(errno == EAGAIN || errno == EINTR)
continue;
- error("PUSH: Failed to poll().");
- close(sock);
- sock = -1;
+ error("STREAM %s [send to %s]: failed to poll().", host->hostname, connected_to);
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
break;
}
else if(unlikely(!retval)) {
if(ifd->revents & POLLIN) {
char buffer[1000 + 1];
- if(read(rrdpush_pipe[PIPE_READ], buffer, 1000) == -1)
- error("PUSH: Cannot read from internal pipe.");
+ if(read(host->rrdpush_pipe[PIPE_READ], buffer, 1000) == -1)
+ error("STREAM %s [send to %s]: cannot read from internal pipe.", host->hostname, connected_to);
}
- if(ofd->revents & POLLOUT && begin < buffer_strlen(rrdpush_buffer)) {
- // info("PUSH: send buffer is ready, sending %zu bytes starting at %zu", buffer_strlen(rrdpush_buffer) - begin, begin);
+ if(ofd->revents & POLLOUT && begin < buffer_strlen(host->rrdpush_buffer)) {
+
+ // BEGIN RRDPUSH LOCKED SESSION
- // fprintf(stderr, "PUSH BEGIN\n");
- // fwrite(&rrdpush_buffer->buffer[begin], 1, buffer_strlen(rrdpush_buffer) - begin, stderr);
- // fprintf(stderr, "\nPUSH END\n");
+ // during this session, data collectors
+ // will not be able to append data to our buffer
+ // but the socket is in non-blocking mode
+ // so, we will not block at send()
- rrdpush_lock();
- ssize_t ret = send(sock, &rrdpush_buffer->buffer[begin], buffer_strlen(rrdpush_buffer) - begin, MSG_DONTWAIT);
+ if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
+ error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
+
+ rrdpush_lock(host);
+
+ ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT);
if(ret == -1) {
if(errno != EAGAIN && errno != EINTR) {
- error("PUSH: failed to send metrics to central netdata at %s. We have sent %zu bytes on this connection.", central_netdata_to_push_data, sent_connection);
- close(sock);
- sock = -1;
+ error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
}
}
else {
sent_connection += ret;
sent_bytes += ret;
begin += ret;
- if(begin == buffer_strlen(rrdpush_buffer)) {
- buffer_flush(rrdpush_buffer);
+ if(begin == buffer_strlen(host->rrdpush_buffer)) {
+ // we send it all
+
+ buffer_flush(host->rrdpush_buffer);
begin = 0;
}
}
- rrdpush_unlock();
+
+ rrdpush_unlock(host);
+
+ if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+ error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
+
+ // END RRDPUSH LOCKED SESSION
}
// protection from overflow
- if(rrdpush_buffer->len > max_size) {
+ if(host->rrdpush_buffer->len > max_size) {
errno = 0;
- error("PUSH: too many data pending. Buffer is %zu bytes long, %zu unsent. We have sent %zu bytes in total, %zu on this connection. Closing connection to flush the data.", rrdpush_buffer->len, rrdpush_buffer->len - begin, sent_bytes, sent_connection);
- if(sock != -1) {
- close(sock);
- sock = -1;
+ error("STREAM %s [send to %s]: too many data pending - buffer is %zu bytes long, %zu unsent - we have sent %zu bytes in total, %zu on this connection. Closing connection to flush the data.", host->hostname, connected_to, host->rrdpush_buffer->len, host->rrdpush_buffer->len - begin, sent_bytes, sent_connection);
+ if(host->rrdpush_socket != -1) {
+ close(host->rrdpush_socket);
+ host->rrdpush_socket = -1;
}
}
}
- debug(D_WEB_CLIENT, "Central netdata push thread exits.");
- if(sock != -1) {
- close(sock);
+cleanup:
+ debug(D_WEB_CLIENT, "STREAM %s [send]: sending thread exits.", host->hostname);
+
+ if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
+ error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
+
+ rrdpush_lock(host);
+ rrdhost_wrlock(host);
+ rrdpush_sender_thread_cleanup_locked_all(host);
+ rrdhost_unlock(host);
+ rrdpush_unlock(host);
+
+ if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+ error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
+
+ pthread_exit(NULL);
+ return NULL;
+}
+
+
+// ----------------------------------------------------------------------------
+// rrdpush receiver thread
+
+int rrdpush_receive(int fd, const char *key, const char *hostname, const char *machine_guid, const char *os, int update_every, char *client_ip, char *client_port) {
+ RRDHOST *host;
+ int history = default_rrd_history_entries;
+ RRD_MEMORY_MODE mode = default_rrd_memory_mode;
+ int health_enabled = default_health_enabled;
+ int rrdpush_enabled = default_rrdpush_enabled;
+ char *rrdpush_destination = default_rrdpush_destination;
+ char *rrdpush_api_key = default_rrdpush_api_key;
+ time_t alarms_delay = 60;
+
+ update_every = (int)appconfig_get_number(&stream_config, machine_guid, "update every", update_every);
+ if(update_every < 0) update_every = 1;
+
+ history = (int)appconfig_get_number(&stream_config, key, "default history", history);
+ history = (int)appconfig_get_number(&stream_config, machine_guid, "history", history);
+ if(history < 5) history = 5;
+
+ mode = rrd_memory_mode_id(appconfig_get(&stream_config, key, "default memory mode", rrd_memory_mode_name(mode)));
+ mode = rrd_memory_mode_id(appconfig_get(&stream_config, machine_guid, "memory mode", rrd_memory_mode_name(mode)));
+
+ health_enabled = appconfig_get_boolean_ondemand(&stream_config, key, "health enabled by default", health_enabled);
+ health_enabled = appconfig_get_boolean_ondemand(&stream_config, machine_guid, "health enabled", health_enabled);
+
+ alarms_delay = appconfig_get_number(&stream_config, key, "default postpone alarms on connect seconds", alarms_delay);
+ alarms_delay = appconfig_get_number(&stream_config, machine_guid, "postpone alarms on connect seconds", alarms_delay);
+
+ rrdpush_enabled = appconfig_get_boolean(&stream_config, key, "default proxy enabled", rrdpush_enabled);
+ rrdpush_enabled = appconfig_get_boolean(&stream_config, machine_guid, "proxy enabled", rrdpush_enabled);
+
+ rrdpush_destination = appconfig_get(&stream_config, key, "default proxy destination", rrdpush_destination);
+ rrdpush_destination = appconfig_get(&stream_config, machine_guid, "proxy destination", rrdpush_destination);
+
+ rrdpush_api_key = appconfig_get(&stream_config, key, "default proxy api key", rrdpush_api_key);
+ rrdpush_api_key = appconfig_get(&stream_config, machine_guid, "proxy api key", rrdpush_api_key);
+
+ if(!strcmp(machine_guid, "localhost"))
+ host = localhost;
+ else
+ host = rrdhost_find_or_create(
+ hostname
+ , machine_guid
+ , os
+ , update_every
+ , history
+ , mode
+ , (health_enabled != CONFIG_BOOLEAN_NO)
+ , (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key)
+ , rrdpush_destination
+ , rrdpush_api_key
+ );
+
+ if(!host) {
+ close(fd);
+ error("STREAM %s [receive from [%s]:%s]: failed to find/create host structure.", hostname, client_ip, client_port);
+ return 1;
}
- static_thread->enabled = 0;
+#ifdef NETDATA_INTERNAL_CHECKS
+ 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"
+ , hostname
+ , client_ip
+ , client_port
+ , host->hostname
+ , host->machine_guid
+ , host->rrd_update_every
+ , host->rrd_history_entries
+ , rrd_memory_mode_name(host->rrd_memory_mode)
+ , (health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto")
+ );
+#endif // NETDATA_INTERNAL_CHECKS
+
+ struct plugind cd = {
+ .enabled = 1,
+ .update_every = default_rrd_update_every,
+ .pid = 0,
+ .serial_failures = 0,
+ .successful_collections = 0,
+ .obsolete = 0,
+ .started_t = now_realtime_sec(),
+ .next = NULL,
+ };
+
+ // put the client IP and port into the buffers used by plugins.d
+ snprintfz(cd.id, CONFIG_MAX_NAME, "%s:%s", client_ip, client_port);
+ snprintfz(cd.filename, FILENAME_MAX, "%s:%s", client_ip, client_port);
+ snprintfz(cd.fullfilename, FILENAME_MAX, "%s:%s", client_ip, client_port);
+ snprintfz(cd.cmd, PLUGINSD_CMD_MAX, "%s:%s", client_ip, client_port);
+
+ info("STREAM %s [receive from [%s]:%s]: initializing communication...", host->hostname, client_ip, client_port);
+ if(send_timeout(fd, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT), 0, 60) != strlen(START_STREAMING_PROMPT)) {
+ error("STREAM %s [receive from [%s]:%s]: cannot send ready command.", host->hostname, client_ip, client_port);
+ close(fd);
+ return 0;
+ }
+
+ // remove the non-blocking flag from the socket
+ if(fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~O_NONBLOCK) == -1)
+ error("STREAM %s [receive from [%s]:%s]: cannot remove the non-blocking flag from socket %d", host->hostname, client_ip, client_port, fd);
+
+ // convert the socket to a FILE *
+ FILE *fp = fdopen(fd, "r");
+ if(!fp) {
+ error("STREAM %s [receive from [%s]:%s]: failed to get a FILE for FD %d.", host->hostname, client_ip, client_port, fd);
+ close(fd);
+ return 0;
+ }
+
+ rrdhost_wrlock(host);
+ host->connected_senders++;
+ if(health_enabled != CONFIG_BOOLEAN_NO)
+ host->health_delay_up_to = now_realtime_sec() + alarms_delay;
+ rrdhost_unlock(host);
+
+ // call the plugins.d processor to receive the metrics
+ info("STREAM %s [receive from [%s]:%s]: receiving metrics...", host->hostname, client_ip, client_port);
+ size_t count = pluginsd_process(host, &cd, fp, 1);
+ error("STREAM %s [receive from [%s]:%s]: disconnected (completed updates %zu).", host->hostname, client_ip, client_port, count);
+
+ rrdhost_wrlock(host);
+ host->connected_senders--;
+ if(!host->connected_senders) {
+ if(health_enabled == CONFIG_BOOLEAN_AUTO)
+ host->health_enabled = 0;
+
+ host->senders_disconnected_time = now_realtime_sec();
+ }
+ rrdhost_unlock(host);
+
+ rrdpush_sender_thread_stop(host);
+
+ // cleanup
+ fclose(fp);
+
+ return (int)count;
+}
+
+struct rrdpush_thread {
+ int fd;
+ char *key;
+ char *hostname;
+ char *machine_guid;
+ char *os;
+ char *client_ip;
+ char *client_port;
+ int update_every;
+};
+
+void *rrdpush_receiver_thread(void *ptr) {
+ struct rrdpush_thread *rpt = (struct rrdpush_thread *)ptr;
+
+ if (pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
+ error("STREAM %s [receive]: cannot set pthread cancel type to DEFERRED.", rpt->hostname);
+
+ if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+ error("STREAM %s [receive]: cannot set pthread cancel state to ENABLE.", rpt->hostname);
+
+
+ info("STREAM %s [%s]:%s: receive thread created (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid());
+ rrdpush_receive(rpt->fd, rpt->key, rpt->hostname, rpt->machine_guid, rpt->os, rpt->update_every, rpt->client_ip, rpt->client_port);
+ info("STREAM %s [receive from [%s]:%s]: receive thread ended (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid());
+
+ freez(rpt->key);
+ freez(rpt->hostname);
+ freez(rpt->machine_guid);
+ freez(rpt->os);
+ freez(rpt->client_ip);
+ freez(rpt->client_port);
+ freez(rpt);
+
pthread_exit(NULL);
return NULL;
}
+
+void rrdpush_sender_thread_spawn(RRDHOST *host) {
+ rrdhost_wrlock(host);
+
+ if(!host->rrdpush_spawn) {
+ if(pthread_create(&host->rrdpush_thread, NULL, rrdpush_sender_thread, (void *) host))
+ error("STREAM %s [send]: failed to create new thread for client.", host->hostname);
+
+ else if(pthread_detach(host->rrdpush_thread))
+ error("STREAM %s [send]: cannot request detach newly created thread.", host->hostname);
+
+ rrdhost_flag_clear(host, RRDHOST_ORPHAN);
+ host->rrdpush_spawn = 1;
+ }
+
+ rrdhost_unlock(host);
+}
+
+int rrdpush_receiver_thread_spawn(RRDHOST *host, struct web_client *w, char *url) {
+ (void)host;
+
+ info("STREAM [receive from [%s]:%s]: new client connection.", w->client_ip, w->client_port);
+
+ char *key = NULL, *hostname = NULL, *machine_guid = NULL, *os = "unknown";
+ int update_every = default_rrd_update_every;
+ char buf[GUID_LEN + 1];
+
+ while(url) {
+ char *value = mystrsep(&url, "?&");
+ if(!value || !*value) continue;
+
+ char *name = mystrsep(&value, "=");
+ if(!name || !*name) continue;
+ if(!value || !*value) continue;
+
+ if(!strcmp(name, "key"))
+ key = value;
+ else if(!strcmp(name, "hostname"))
+ hostname = value;
+ else if(!strcmp(name, "machine_guid"))
+ machine_guid = value;
+ else if(!strcmp(name, "update_every"))
+ update_every = (int)strtoul(value, NULL, 0);
+ else if(!strcmp(name, "os"))
+ os = value;
+ }
+
+ if(!key || !*key) {
+ error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "You need an API key for this request.");
+ return 401;
+ }
+
+ if(!hostname || !*hostname) {
+ error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "You need to send a hostname too.");
+ return 400;
+ }
+
+ if(!machine_guid || !*machine_guid) {
+ error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "You need to send a machine GUID too.");
+ return 400;
+ }
+
+ if(regenerate_guid(key, buf) == -1) {
+ error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID. Forbidding access.", w->client_ip, w->client_port, key);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Your API key is invalid.");
+ return 401;
+ }
+
+ if(regenerate_guid(machine_guid, buf) == -1) {
+ error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, key);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Your machine GUID is invalid.");
+ return 404;
+ }
+
+ if(!appconfig_get_boolean(&stream_config, key, "enabled", 0)) {
+ error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Your API key is not permitted access.");
+ return 401;
+ }
+
+ if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) {
+ error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
+ buffer_flush(w->response.data);
+ buffer_sprintf(w->response.data, "Your machine guide is not permitted access.");
+ return 404;
+ }
+
+ struct rrdpush_thread *rpt = mallocz(sizeof(struct rrdpush_thread));
+ rpt->fd = w->ifd;
+ rpt->key = strdupz(key);
+ rpt->hostname = strdupz(hostname);
+ rpt->machine_guid = strdupz(machine_guid);
+ rpt->os = strdupz(os);
+ rpt->client_ip = strdupz(w->client_ip);
+ rpt->client_port = strdupz(w->client_port);
+ rpt->update_every = update_every;
+ pthread_t thread;
+
+ debug(D_SYSTEM, "STREAM [receive from [%s]:%s]: starting receiving thread.", w->client_ip, w->client_port);
+
+ if(pthread_create(&thread, NULL, rrdpush_receiver_thread, (void *)rpt))
+ error("STREAM [receive from [%s]:%s]: failed to create new thread for client.", w->client_ip, w->client_port);
+
+ else if(pthread_detach(thread))
+ error("STREAM [receive from [%s]:%s]: cannot request detach newly created thread.", w->client_ip, w->client_port);
+
+ // prevent the caller from closing the streaming socket
+ if(w->ifd == w->ofd)
+ w->ifd = w->ofd = -1;
+ else
+ w->ifd = -1;
+
+ buffer_flush(w->response.data);
+ return 200;
+}
projects / netdata.git / blobdiff