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flb_engine.c
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flb_engine.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2024 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <monkey/mk_core.h>
#include <fluent-bit/flb_bucket_queue.h>
#include <fluent-bit/flb_event_loop.h>
#include <fluent-bit/flb_time.h>
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_bits.h>
#include <fluent-bit/flb_macros.h>
#include <fluent-bit/flb_pipe.h>
#include <fluent-bit/flb_custom.h>
#include <fluent-bit/flb_input.h>
#include <fluent-bit/flb_output.h>
#include <fluent-bit/flb_error.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_config.h>
#include <fluent-bit/flb_engine.h>
#include <fluent-bit/flb_engine_dispatch.h>
#include <fluent-bit/flb_network.h>
#include <fluent-bit/flb_task.h>
#include <fluent-bit/flb_router.h>
#include <fluent-bit/flb_http_server.h>
#include <fluent-bit/flb_scheduler.h>
#include <fluent-bit/flb_parser.h>
#include <fluent-bit/flb_sosreport.h>
#include <fluent-bit/flb_storage.h>
#include <fluent-bit/flb_http_server.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_metrics.h>
#include <fluent-bit/flb_version.h>
#include <fluent-bit/flb_upstream.h>
#include <fluent-bit/flb_downstream.h>
#include <fluent-bit/flb_ring_buffer.h>
#include <fluent-bit/flb_notification.h>
#include <fluent-bit/flb_simd.h>
#ifdef FLB_HAVE_METRICS
#include <fluent-bit/flb_metrics_exporter.h>
#endif
#ifdef FLB_HAVE_STREAM_PROCESSOR
#include <fluent-bit/stream_processor/flb_sp.h>
#endif
#ifdef FLB_HAVE_AWS_ERROR_REPORTER
#include <fluent-bit/aws/flb_aws_error_reporter.h>
extern struct flb_aws_error_reporter *error_reporter;
#endif
#include <ctraces/ctr_version.h>
static pthread_once_t local_thread_engine_evl_init = PTHREAD_ONCE_INIT;
FLB_TLS_DEFINE(struct mk_event_loop, flb_engine_evl);
static void flb_engine_evl_init_private()
{
FLB_TLS_INIT(flb_engine_evl);
}
void flb_engine_evl_init()
{
pthread_once(&local_thread_engine_evl_init, flb_engine_evl_init_private);
}
struct mk_event_loop *flb_engine_evl_get()
{
struct mk_event_loop *evl;
evl = FLB_TLS_GET(flb_engine_evl);
return evl;
}
void flb_engine_evl_set(struct mk_event_loop *evl)
{
FLB_TLS_SET(flb_engine_evl, evl);
}
int flb_engine_destroy_tasks(struct mk_list *tasks)
{
int c = 0;
struct mk_list *tmp;
struct mk_list *head;
struct flb_task *task;
mk_list_foreach_safe(head, tmp, tasks) {
task = mk_list_entry(head, struct flb_task, _head);
flb_task_destroy(task, FLB_FALSE);
c++;
}
return c;
}
void flb_engine_reschedule_retries(struct flb_config *config)
{
int ret;
struct mk_list *head;
struct mk_list *t_head;
struct mk_list *rt_head;
struct mk_list *tmp_task;
struct mk_list *tmp_retry_task;
struct flb_task *task;
struct flb_input_instance *ins;
struct flb_task_retry *retry;
/* Invalidate and reschedule all retry tasks to be retried immediately */
mk_list_foreach(head, &config->inputs) {
ins = mk_list_entry(head, struct flb_input_instance, _head);
mk_list_foreach_safe(t_head, tmp_task, &ins->tasks) {
task = mk_list_entry(t_head, struct flb_task, _head);
mk_list_foreach_safe(rt_head, tmp_retry_task, &task->retries) {
retry = mk_list_entry(rt_head, struct flb_task_retry, _head);
flb_sched_request_invalidate(config, retry);
ret = flb_sched_retry_now(config, retry);
if (ret == -1) {
/* Can't do much here, just continue on */
flb_warn("[engine] failed to immediately re-schedule retry=%p "
"for task %i. Err: %d", retry, task->id, flb_errno());
} else {
flb_debug("[engine] re-scheduled retry=%p for task %i",
retry, task->id);
}
}
}
}
}
int flb_engine_flush(struct flb_config *config,
struct flb_input_plugin *in_force)
{
struct flb_input_instance *in;
struct flb_input_plugin *p;
struct mk_list *head;
mk_list_foreach(head, &config->inputs) {
in = mk_list_entry(head, struct flb_input_instance, _head);
p = in->p;
if (in_force != NULL && p != in_force) {
continue;
}
flb_engine_dispatch(0, in, config);
}
return 0;
}
/* Cleanup function that runs every 1.5 second */
static void cb_engine_sched_timer(struct flb_config *ctx, void *data)
{
(void) data;
/* Upstream timeout handling */
flb_upstream_conn_timeouts(&ctx->upstreams);
/* Downstream timeout handling */
flb_downstream_conn_timeouts(&ctx->downstreams);
}
static inline int handle_input_event(flb_pipefd_t fd, uint64_t ts,
struct flb_config *config)
{
int bytes;
uint32_t type;
uint32_t ins_id;
uint64_t val;
bytes = flb_pipe_r(fd, &val, sizeof(val));
if (bytes == -1) {
flb_errno();
return -1;
}
/* Get type and key */
type = FLB_BITS_U64_HIGH(val);
ins_id = FLB_BITS_U64_LOW(val);
/* At the moment we only support events coming from an input coroutine */
if (type != FLB_ENGINE_IN_CORO) {
flb_error("[engine] invalid event type %i for input handler",
type);
return -1;
}
flb_input_coro_finished(config, (int) ins_id);
return 0;
}
static inline double calculate_chunk_capacity_percent(struct flb_output_instance *ins)
{
/* Currently, total_limit_size 0(K|M)B will be translated as no
* limit. So, we need to handle this situation to be unlimited. */
if (ins->total_limit_size <= 0) {
return 100.0;
}
return 100 * (1.0 - (ins->fs_backlog_chunks_size + ins->fs_chunks_size)/
((double)ins->total_limit_size));
}
static inline int handle_output_event(uint64_t ts,
struct flb_config *config,
uint64_t val)
{
int ret;
int task_id;
int out_id;
int retries;
int retry_seconds;
uint32_t type;
uint32_t key;
char *name;
struct flb_task *task;
struct flb_task_retry *retry;
struct flb_output_instance *ins;
/* Get type and key */
type = FLB_BITS_U64_HIGH(val);
key = FLB_BITS_U64_LOW(val);
if (type != FLB_ENGINE_TASK) {
flb_error("[engine] invalid event type %i for output handler",
type);
return -1;
}
/*
* The notion of ENGINE_TASK is associated to outputs. All thread
* references below belongs to flb_output_coro's.
*/
ret = FLB_TASK_RET(key);
task_id = FLB_TASK_ID(key);
out_id = FLB_TASK_OUT(key);
#ifdef FLB_HAVE_TRACE
char *trace_st = NULL;
if (ret == FLB_OK) {
trace_st = "OK";
}
else if (ret == FLB_ERROR) {
trace_st = "ERROR";
}
else if (ret == FLB_RETRY) {
trace_st = "RETRY";
}
flb_trace("%s[engine] [task event]%s task_id=%i out_id=%i return=%s",
ANSI_YELLOW, ANSI_RESET,
task_id, out_id, trace_st);
#endif
task = config->tasks_map[task_id].task;
ins = flb_output_get_instance(config, out_id);
if (flb_output_is_threaded(ins) == FLB_FALSE) {
flb_output_flush_finished(config, out_id);
}
name = (char *) flb_output_name(ins);
/* If we are in synchronous mode, flush the next waiting task */
if (ins->flags & FLB_OUTPUT_SYNCHRONOUS) {
if (ret == FLB_OK || ret == FLB_RETRY || ret == FLB_ERROR) {
flb_output_task_singleplex_flush_next(ins->singleplex_queue);
}
}
/* A task has finished, delete it */
if (ret == FLB_OK) {
/* cmetrics */
cmt_counter_add(ins->cmt_proc_records, ts, task->event_chunk->total_events,
1, (char *[]) {name});
cmt_counter_add(ins->cmt_proc_bytes, ts, task->event_chunk->size,
1, (char *[]) {name});
/* [OLD API] Update metrics */
#ifdef FLB_HAVE_METRICS
if (ins->metrics) {
flb_metrics_sum(FLB_METRIC_OUT_OK_RECORDS,
task->event_chunk->total_events, ins->metrics);
flb_metrics_sum(FLB_METRIC_OUT_OK_BYTES,
task->event_chunk->size, ins->metrics);
}
#endif
/* Inform the user if a 'retry' succedeed */
if (mk_list_size(&task->retries) > 0) {
retries = flb_task_retry_count(task, ins);
if (retries > 0) {
flb_info("[engine] flush chunk '%s' succeeded at retry %i: "
"task_id=%i, input=%s > output=%s (out_id=%i)",
flb_input_chunk_get_name(task->ic),
retries, task_id,
flb_input_name(task->i_ins),
flb_output_name(ins), out_id);
}
}
else if (flb_task_from_fs_storage(task) == FLB_TRUE) {
flb_info("[engine] flush backlog chunk '%s' succeeded: "
"task_id=%i, input=%s > output=%s (out_id=%i)",
flb_input_chunk_get_name(task->ic),
task_id,
flb_input_name(task->i_ins),
flb_output_name(ins), out_id);
}
cmt_gauge_set(ins->cmt_chunk_available_capacity_percent, ts,
calculate_chunk_capacity_percent(ins),
1, (char *[]) {name});
flb_task_retry_clean(task, ins);
flb_task_users_dec(task, FLB_TRUE);
}
else if (ret == FLB_RETRY) {
if (ins->retry_limit == FLB_OUT_RETRY_NONE) {
/* cmetrics: output_dropped_records_total */
cmt_counter_add(ins->cmt_dropped_records, ts, task->records,
1, (char *[]) {name});
cmt_gauge_set(ins->cmt_chunk_available_capacity_percent, ts,
calculate_chunk_capacity_percent(ins),
1, (char *[]) {name});
/* OLD metrics API */
#ifdef FLB_HAVE_METRICS
flb_metrics_sum(FLB_METRIC_OUT_DROPPED_RECORDS, task->records, ins->metrics);
#endif
flb_info("[engine] chunk '%s' is not retried (no retry config): "
"task_id=%i, input=%s > output=%s (out_id=%i)",
flb_input_chunk_get_name(task->ic),
task_id,
flb_input_name(task->i_ins),
flb_output_name(ins), out_id);
flb_task_retry_clean(task, ins);
flb_task_users_dec(task, FLB_TRUE);
return 0;
}
/* Create a Task-Retry */
retry = flb_task_retry_create(task, ins);
if (!retry) {
/*
* It can fail in two situations:
*
* - No enough memory (unlikely)
* - It reached the maximum number of re-tries
*/
/* cmetrics */
cmt_counter_inc(ins->cmt_retries_failed, ts, 1, (char *[]) {name});
cmt_counter_add(ins->cmt_dropped_records, ts, task->records,
1, (char *[]) {name});
cmt_gauge_set(ins->cmt_chunk_available_capacity_percent, ts,
calculate_chunk_capacity_percent(ins),
1, (char *[]) {name});
/* OLD metrics API */
#ifdef FLB_HAVE_METRICS
flb_metrics_sum(FLB_METRIC_OUT_RETRY_FAILED, 1, ins->metrics);
flb_metrics_sum(FLB_METRIC_OUT_DROPPED_RECORDS, task->records, ins->metrics);
#endif
/* Notify about this failed retry */
flb_error("[engine] chunk '%s' cannot be retried: "
"task_id=%i, input=%s > output=%s",
flb_input_chunk_get_name(task->ic),
task_id,
flb_input_name(task->i_ins),
flb_output_name(ins));
flb_task_retry_clean(task, ins);
flb_task_users_dec(task, FLB_TRUE);
return 0;
}
/* Always destroy the old coroutine */
flb_task_users_dec(task, FLB_FALSE);
/* Let the scheduler to retry the failed task/thread */
retry_seconds = flb_sched_request_create(config,
retry, retry->attempts);
/*
* If for some reason the Scheduler could not include this retry,
* we need to get rid of it, likely this is because of not enough
* memory available or we ran out of file descriptors.
*/
if (retry_seconds == -1) {
flb_warn("[engine] retry for chunk '%s' could not be scheduled: "
"input=%s > output=%s",
flb_input_chunk_get_name(task->ic),
flb_input_name(task->i_ins),
flb_output_name(ins));
flb_task_retry_destroy(retry);
flb_task_users_release(task);
}
else {
/* Inform the user 'retry' has been scheduled */
flb_warn("[engine] failed to flush chunk '%s', retry in %i seconds: "
"task_id=%i, input=%s > output=%s (out_id=%i)",
flb_input_chunk_get_name(task->ic),
retry_seconds,
task->id,
flb_input_name(task->i_ins),
flb_output_name(ins), out_id);
/* cmetrics */
cmt_counter_inc(ins->cmt_retries, ts, 1, (char *[]) {name});
cmt_counter_add(ins->cmt_retried_records, ts, task->records,
1, (char *[]) {name});
cmt_gauge_set(ins->cmt_chunk_available_capacity_percent, ts,
calculate_chunk_capacity_percent(ins),
1, (char *[]) {name});
/* OLD metrics API: update the metrics since a new retry is coming */
#ifdef FLB_HAVE_METRICS
flb_metrics_sum(FLB_METRIC_OUT_RETRY, 1, ins->metrics);
flb_metrics_sum(FLB_METRIC_OUT_RETRIED_RECORDS, task->records, ins->metrics);
#endif
}
}
else if (ret == FLB_ERROR) {
/* cmetrics */
cmt_counter_inc(ins->cmt_errors, ts, 1, (char *[]) {name});
cmt_counter_add(ins->cmt_dropped_records, ts, task->records,
1, (char *[]) {name});
cmt_gauge_set(ins->cmt_chunk_available_capacity_percent, ts,
calculate_chunk_capacity_percent(ins),
1, (char *[]) {name});
/* OLD API */
#ifdef FLB_HAVE_METRICS
flb_metrics_sum(FLB_METRIC_OUT_ERROR, 1, ins->metrics);
flb_metrics_sum(FLB_METRIC_OUT_DROPPED_RECORDS, task->records, ins->metrics);
#endif
flb_task_retry_clean(task, ins);
flb_task_users_dec(task, FLB_TRUE);
}
return 0;
}
static inline int handle_output_events(flb_pipefd_t fd,
struct flb_config *config)
{
uint64_t values[FLB_ENGINE_OUTPUT_EVENT_BATCH_SIZE];
int result;
int bytes;
size_t limit;
size_t index;
uint64_t ts;
memset(&values, 0, sizeof(values));
bytes = flb_pipe_r(fd, &values, sizeof(values));
if (bytes == -1) {
flb_errno();
return -1;
}
limit = floor(bytes / sizeof(uint64_t));
ts = cfl_time_now();
for (index = 0 ;
index < limit &&
index < (sizeof(values) / sizeof(values[0])) ;
index++) {
if (values[index] == 0) {
break;
}
result = handle_output_event(ts, config, values[index]);
}
/* This is wrong, in one hand, if handle_output_event_ fails we should
* stop, on the other, we have already consumed the signals from the pipe
* so we have to do whatever we can with them.
*
* And a side effect is that since we have N results but we are not aborting
* as soon as we get an error there could be N results to this function which
* not only are we not ready to handle but is not even checked at the moment.
*/
return result;
}
static inline int flb_engine_manager(flb_pipefd_t fd, struct flb_config *config)
{
int bytes;
uint32_t type;
uint32_t key;
uint64_t val;
/* read the event */
bytes = flb_pipe_r(fd, &val, sizeof(val));
if (bytes == -1) {
flb_errno();
return -1;
}
/* Get type and key */
type = FLB_BITS_U64_HIGH(val);
key = FLB_BITS_U64_LOW(val);
/* Flush all remaining data */
if (type == 1) { /* Engine type */
if (key == FLB_ENGINE_STOP) {
flb_trace("[engine] flush enqueued data");
flb_engine_flush(config, NULL);
return FLB_ENGINE_STOP;
}
}
return 0;
}
static FLB_INLINE int flb_engine_handle_event(flb_pipefd_t fd, int mask,
struct flb_config *config)
{
int64_t ret;
/* flb_engine_shutdown was already initiated */
if (config->is_running == FLB_FALSE) {
return 0;
}
if (mask & MK_EVENT_READ) {
/* Check if we need to flush */
if (config->flush_fd == fd) {
flb_utils_timer_consume(fd);
flb_engine_flush(config, NULL);
return 0;
}
else if (config->shutdown_fd == fd) {
flb_utils_pipe_byte_consume(fd);
return FLB_ENGINE_SHUTDOWN;
}
else if (config->ch_manager[0] == fd) {
ret = flb_engine_manager(fd, config);
if (ret == FLB_ENGINE_STOP || ret == FLB_ENGINE_EV_STOP) {
return FLB_ENGINE_STOP;
}
}
/* Try to match the file descriptor with a collector event */
ret = flb_input_collector_fd(fd, config);
if (ret != -1) {
return ret;
}
/* Metrics exporter event ? */
#ifdef FLB_HAVE_METRICS
ret = flb_me_fd_event(fd, config->metrics);
if (ret != -1) {
return ret;
}
#endif
/* Stream processor event ? */
#ifdef FLB_HAVE_STREAM_PROCESSOR
if (config->stream_processor_ctx) {
ret = flb_sp_fd_event(fd, config->stream_processor_ctx);
if (ret != -1) {
return ret;
}
}
#endif
}
return 0;
}
static int flb_engine_started(struct flb_config *config)
{
uint64_t val;
/* Check the channel is valid (enabled by library mode) */
if (config->ch_notif[1] <= 0) {
return -1;
}
val = FLB_ENGINE_STARTED;
return flb_pipe_w(config->ch_notif[1], &val, sizeof(uint64_t));
}
int flb_engine_failed(struct flb_config *config)
{
int ret;
uint64_t val;
/* Check the channel is valid (enabled by library mode) */
if (config->ch_notif[1] <= 0) {
flb_error("[engine] no channel to notify FAILED message");
return -1;
}
val = FLB_ENGINE_FAILED;
ret = flb_pipe_w(config->ch_notif[1], &val, sizeof(uint64_t));
if (ret == -1) {
flb_error("[engine] fail to dispatch FAILED message");
}
/* Waiting flushing log */
sleep(1);
return ret;
}
static int flb_engine_log_start(struct flb_config *config)
{
int type;
int level;
/* Log Level */
if (config->verbose != FLB_LOG_INFO) {
level = config->verbose;
}
else {
level = FLB_LOG_INFO;
}
/* Destination based on type */
if (config->log_file) {
type = FLB_LOG_FILE;
}
else {
type = FLB_LOG_STDERR;
}
if (flb_log_create(config, type, level, config->log_file) == NULL) {
return -1;
}
return 0;
}
static void flb_engine_drain_ring_buffer_signal_channel(flb_pipefd_t fd)
{
static char signal_buffer[512];
flb_pipe_r(fd, signal_buffer, sizeof(signal_buffer));
}
#ifdef FLB_HAVE_IN_STORAGE_BACKLOG
extern int sb_segregate_chunks(struct flb_config *config);
#else
int sb_segregate_chunks(struct flb_config *config)
{
return 0;
}
#endif
int flb_engine_start(struct flb_config *config)
{
int ret;
uint64_t ts;
char tmp[16];
int rb_flush_flag;
struct flb_time t_flush;
struct mk_event *event;
struct mk_event_loop *evl;
struct flb_bucket_queue *evl_bktq;
struct flb_sched *sched;
struct flb_net_dns dns_ctx;
struct flb_notification *notification;
/* Initialize the networking layer */
flb_net_lib_init();
flb_net_ctx_init(&dns_ctx);
flb_net_dns_ctx_init();
flb_net_dns_ctx_set(&dns_ctx);
flb_pack_init(config);
/* Create the event loop and set it in the global configuration */
evl = mk_event_loop_create(256);
if (!evl) {
fprintf(stderr, "[log] could not create event loop\n");
return -1;
}
config->evl = evl;
/* Create the bucket queue (FLB_ENGINE_PRIORITY_COUNT priorities) */
evl_bktq = flb_bucket_queue_create(FLB_ENGINE_PRIORITY_COUNT);
if (!evl_bktq) {
return -1;
}
config->evl_bktq = evl_bktq;
/*
* Event loop channel to ingest flush events from flb_engine_flush()
*
* - FLB engine uses 'ch_self_events[1]' to dispatch tasks to self
* - Self to receive message on ch_parent_events[0]
*
* The mk_event_channel_create() will attach the pipe read end ch_self_events[0]
* to the local event loop 'evl'.
*/
ret = mk_event_channel_create(config->evl,
&config->ch_self_events[0],
&config->ch_self_events[1],
&config->event_thread_init);
if (ret == -1) {
flb_error("[engine] could not create engine thread channel");
return -1;
}
/* Signal type to indicate a "flush" request */
config->event_thread_init.type = FLB_ENGINE_EV_THREAD_ENGINE;
config->event_thread_init.priority = FLB_ENGINE_PRIORITY_THREAD;
/* Register the event loop on this thread */
flb_engine_evl_init();
flb_engine_evl_set(evl);
/* Start the Logging service */
ret = flb_engine_log_start(config);
if (ret == -1) {
fprintf(stderr, "[engine] log start failed\n");
return -1;
}
flb_info("[fluent bit] version=%s, commit=%.10s, pid=%i",
FLB_VERSION_STR, FLB_GIT_HASH, getpid());
/* Debug coroutine stack size */
flb_utils_bytes_to_human_readable_size(config->coro_stack_size,
tmp, sizeof(tmp));
flb_debug("[engine] coroutine stack size: %u bytes (%s)",
config->coro_stack_size, tmp);
/*
* Create a communication channel: this routine creates a channel to
* signal the Engine event loop. It's useful to stop the event loop
* or to instruct anything else without break.
*/
ret = mk_event_channel_create(config->evl,
&config->ch_manager[0],
&config->ch_manager[1],
&config->ch_event);
if (ret != 0) {
flb_error("[engine] could not create manager channels");
return -1;
}
ret = mk_event_channel_create(config->evl,
&config->notification_channels[0],
&config->notification_channels[1],
&config->notification_event);
if (ret == -1) {
flb_error("could not create main notification channel");
return -1;
}
config->notification_channels_initialized = FLB_TRUE;
config->notification_event.type = FLB_ENGINE_EV_NOTIFICATION;
/* Initialize custom plugins */
ret = flb_custom_init_all(config);
if (ret == -1) {
return -1;
}
/* Start the Storage engine */
ret = flb_storage_create(config);
if (ret == -1) {
flb_error("[engine] storage creation failed");
return -1;
}
/* Internals */
flb_info("[simd ] %s", flb_simd_info());
/* Init Metrics engine */
cmt_initialize();
flb_info("[cmetrics] version=%s", cmt_version());
flb_info("[ctraces ] version=%s", ctr_version());
/* Initialize the scheduler */
sched = flb_sched_create(config, config->evl);
if (!sched) {
flb_error("[engine] scheduler could not start");
return -1;
}
config->sched = sched;
/* Register the scheduler context */
flb_sched_ctx_init();
flb_sched_ctx_set(sched);
/* Initialize input plugins */
ret = flb_input_init_all(config);
if (ret == -1) {
flb_error("[engine] input initialization failed");
return -1;
}
/* Initialize filter plugins */
ret = flb_filter_init_all(config);
if (ret == -1) {
flb_error("[engine] filter initialization failed");
return -1;
}
/* Inputs pre-run */
flb_input_pre_run_all(config);
/* Initialize output plugins */
ret = flb_output_init_all(config);
if (ret == -1) {
flb_error("[engine] output initialization failed");
return -1;
}
/* Outputs pre-run */
flb_output_pre_run(config);
/* Create and register the timer fd for flush procedure */
event = &config->event_flush;
event->mask = MK_EVENT_EMPTY;
event->status = MK_EVENT_NONE;
flb_time_from_double(&t_flush, config->flush);
config->flush_fd = mk_event_timeout_create(evl,
t_flush.tm.tv_sec,
t_flush.tm.tv_nsec,
event);
event->priority = FLB_ENGINE_PRIORITY_FLUSH;
if (config->flush_fd == -1) {
flb_utils_error(FLB_ERR_CFG_FLUSH_CREATE);
}
#ifdef FLB_HAVE_METRICS
if (config->storage_metrics == FLB_TRUE) {
config->storage_metrics_ctx = flb_storage_metrics_create(config);
}
#endif
/* Prepare routing paths */
ret = flb_router_io_set(config);
if (ret == -1) {
flb_error("[engine] router failed");
return -1;
}
/* Support mode only */
if (config->support_mode == FLB_TRUE) {
sleep(1);
flb_sosreport(config);
exit(1);
}
/* Initialize Metrics exporter */
#ifdef FLB_HAVE_METRICS
config->metrics = flb_me_create(config);
#endif
/* Initialize HTTP Server */
#ifdef FLB_HAVE_HTTP_SERVER
if (config->http_server == FLB_TRUE) {
config->http_ctx = flb_hs_create(config->http_listen, config->http_port,
config);
flb_hs_start(config->http_ctx);
}
#endif
#ifdef FLB_HAVE_STREAM_PROCESSOR
config->stream_processor_ctx = flb_sp_create(config);
if (!config->stream_processor_ctx) {
flb_error("[engine] could not initialize stream processor");
}
#endif
/* Initialize collectors */
flb_input_collectors_start(config);
/*
* Sched a permanent callback triggered every 1.5 second to let other
* Fluent Bit components run tasks at that interval.
*/
ret = flb_sched_timer_cb_create(config->sched,
FLB_SCHED_TIMER_CB_PERM,
1500, cb_engine_sched_timer, config, NULL);
if (ret == -1) {
flb_error("[engine] could not schedule permanent callback");
return -1;
}
/* DEV/TEST change only */
int rb_ms;
char *rb_env;
rb_env = getenv("FLB_DEV_RB_MS");
if (!rb_env) {
rb_ms = 250;
}
else {
rb_ms = atoi(rb_env);
}
/* Input instance / Ring buffer collector */
ret = flb_sched_timer_cb_create(config->sched,
FLB_SCHED_TIMER_CB_PERM,
rb_ms, flb_input_chunk_ring_buffer_collector,
config, NULL);
if (ret == -1) {
flb_error("[engine] could not schedule permanent callback");
return -1;
}
/* Signal that we have started */
flb_engine_started(config);
ret = sb_segregate_chunks(config);
if (ret) {
flb_error("[engine] could not segregate backlog chunks");
return -2;
}
while (1) {
rb_flush_flag = FLB_FALSE;
mk_event_wait(evl); /* potentially conditional mk_event_wait or mk_event_wait_2 based on bucket queue capacity for one shot events */
flb_event_priority_live_foreach(event, evl_bktq, evl, FLB_ENGINE_LOOP_MAX_ITER) {
if (event->type == FLB_ENGINE_EV_CORE) {
ret = flb_engine_handle_event(event->fd, event->mask, config);
if (ret == FLB_ENGINE_STOP) {
if (config->grace_count == 0) {
if (config->grace >= 0) {
flb_warn("[engine] service will shutdown in max %u seconds",
config->grace);
} else {
flb_warn("[engine] service will shutdown when all remaining tasks are flushed");
}
/* Reschedule retry tasks to be retried immediately */
flb_engine_reschedule_retries(config);
}
/* mark the runtime as the ingestion is not active and that we are in shutting down mode */
config->is_ingestion_active = FLB_FALSE;
config->is_shutting_down = FLB_TRUE;
/* pause all input plugin instances */
flb_input_pause_all(config);
/*
* We are preparing to shutdown, we give a graceful time
* of 'config->grace' seconds to process any pending event.
*/
event = &config->event_shutdown;
event->mask = MK_EVENT_EMPTY;
event->status = MK_EVENT_NONE;
/*
* Configure a timer of 1 second, on expiration the code will
* jump into the FLB_ENGINE_SHUTDOWN condition where it will
* check if the grace period has finished, or if there are
* any remaining tasks.
*
* If no tasks exists, there is no need to wait for the maximum
* grace period.
*/
config->shutdown_fd = mk_event_timeout_create(evl,
1,
0,