diff options
Diffstat (limited to 'src/fluent-bit/plugins/in_random/random.c')
| -rw-r--r-- | src/fluent-bit/plugins/in_random/random.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_random/random.c b/src/fluent-bit/plugins/in_random/random.c new file mode 100644 index 000000000..ab6e59ffd --- /dev/null +++ b/src/fluent-bit/plugins/in_random/random.c @@ -0,0 +1,245 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* Fluent Bit + * ========== + * Copyright (C) 2015-2022 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 <fluent-bit/flb_input_plugin.h> +#include <fluent-bit/flb_config.h> +#include <fluent-bit/flb_error.h> +#include <fluent-bit/flb_pack.h> +#include <fluent-bit/flb_random.h> +#include <fluent-bit/flb_log_event_encoder.h> +#include <msgpack.h> + +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define DEFAULT_INTERVAL_SEC "1" +#define DEFAULT_INTERVAL_NSEC "0" + +struct flb_in_random_config { + /* Config properties */ + int interval_sec; + int interval_nsec; + int samples; + + /* Internal */ + int samples_count; + int coll_fd; + + struct flb_input_instance *ins; + struct flb_log_event_encoder *log_encoder; +}; + +/* cb_collect callback */ +static int in_random_collect(struct flb_input_instance *ins, + struct flb_config *config, void *in_context) +{ + int ret; + uint64_t val; + struct flb_in_random_config *ctx = in_context; + + if (ctx->samples == 0) { + return -1; + } + + if (ctx->samples > 0 && (ctx->samples_count >= ctx->samples)) { + return -1; + } + + if (flb_random_bytes((unsigned char *) &val, sizeof(uint64_t))) { + val = time(NULL); + } + + ret = flb_log_event_encoder_begin_record(ctx->log_encoder); + + if (ret == FLB_EVENT_ENCODER_SUCCESS) { + ret = flb_log_event_encoder_set_current_timestamp(ctx->log_encoder); + } + + if (ret == FLB_EVENT_ENCODER_SUCCESS) { + ret = flb_log_event_encoder_append_body_values( + ctx->log_encoder, + FLB_LOG_EVENT_CSTRING_VALUE("rand_value"), + FLB_LOG_EVENT_UINT64_VALUE(val)); + } + + if (ret == FLB_EVENT_ENCODER_SUCCESS) { + ret = flb_log_event_encoder_commit_record(ctx->log_encoder); + } + + if (ret == FLB_EVENT_ENCODER_SUCCESS) { + flb_input_log_append(ctx->ins, NULL, 0, + ctx->log_encoder->output_buffer, + ctx->log_encoder->output_length); + ret = 0; + } + else { + flb_plg_error(ctx->ins, "log event encoding error : %d", ret); + + ret = -1; + } + + flb_log_event_encoder_reset(ctx->log_encoder); + + ctx->samples_count++; + + return 0; +} + +/* Set plugin configuration */ +static int in_random_config_read(struct flb_in_random_config *ctx, + struct flb_input_instance *in) +{ + int ret; + /* Load the config map */ + ret = flb_input_config_map_set(in, (void *)ctx); + if (ret == -1) { + return -1; + } + + /* interval settings */ + if (ctx->interval_sec <= 0 && ctx->interval_nsec <= 0) { + /* Illegal settings. Override them. */ + ctx->interval_sec = atoi(DEFAULT_INTERVAL_SEC); + ctx->interval_nsec = atoi(DEFAULT_INTERVAL_NSEC); + } + + + flb_plg_debug(ctx->ins, "interval_sec=%d interval_nsec=%d", + ctx->interval_sec, ctx->interval_nsec); + + return 0; +} + +/* Initialize plugin */ +static int in_random_init(struct flb_input_instance *in, + struct flb_config *config, void *data) +{ + int ret = -1; + struct flb_in_random_config *ctx = NULL; + + /* Allocate space for the configuration */ + ctx = flb_calloc(1, sizeof(struct flb_in_random_config)); + if (!ctx) { + return -1; + } + ctx->samples_count = 0; + ctx->ins = in; + + ctx->log_encoder = flb_log_event_encoder_create(FLB_LOG_EVENT_FORMAT_DEFAULT); + + if (ctx->log_encoder == NULL) { + flb_plg_error(in, "could not initialize event encoder"); + flb_free(ctx); + + return -1; + } + + /* Initialize head config */ + ret = in_random_config_read(ctx, in); + if (ret < 0) { + flb_free(ctx); + return -1; + } + + flb_input_set_context(in, ctx); + ret = flb_input_set_collector_time(in, + in_random_collect, + ctx->interval_sec, + ctx->interval_nsec, config); + if (ret < 0) { + flb_plg_error(ctx->ins, "could not set collector for head input plugin"); + flb_free(ctx); + return -1; + } + ctx->coll_fd = ret; + return 0; +} + +static void in_random_pause(void *data, struct flb_config *config) +{ + struct flb_in_random_config *ctx = data; + + flb_input_collector_pause(ctx->coll_fd, ctx->ins); + +} + +static void in_random_resume(void *data, struct flb_config *config) +{ + struct flb_in_random_config *ctx = data; + + flb_input_collector_resume(ctx->coll_fd, ctx->ins); +} + +static int in_random_exit(void *data, struct flb_config *config) +{ + struct flb_in_random_config *ctx = data; + (void) *config; + + if (!ctx) { + return 0; + } + + if (ctx->log_encoder != NULL) { + flb_log_event_encoder_destroy(ctx->log_encoder); + } + + flb_free(ctx); + return 0; +} + + +static struct flb_config_map config_map[] = { + // samples + // interval_sec + // interval_nsec + { + FLB_CONFIG_MAP_INT, "samples", "-1", + 0, FLB_TRUE, offsetof(struct flb_in_random_config, samples), + "Number of samples to send, -1 for infinite" + }, + { + FLB_CONFIG_MAP_INT, "interval_sec", DEFAULT_INTERVAL_SEC, + 0, FLB_TRUE, offsetof(struct flb_in_random_config, interval_sec), + "Set the collector interval" + }, + { + FLB_CONFIG_MAP_INT, "interval_nsec", DEFAULT_INTERVAL_NSEC, + 0, FLB_TRUE, offsetof(struct flb_in_random_config, interval_nsec), + "Set the collector interval (sub seconds)" + }, + /* EOF */ + {0} + +}; + +struct flb_input_plugin in_random_plugin = { + .name = "random", + .description = "Random", + .cb_init = in_random_init, + .cb_pre_run = NULL, + .cb_collect = in_random_collect, + .cb_flush_buf = NULL, + .cb_pause = in_random_pause, + .cb_resume = in_random_resume, + .cb_exit = in_random_exit, + .config_map = config_map +}; |