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-rw-r--r--fluent-bit/plugins/out_influxdb/influxdb.c682
1 files changed, 682 insertions, 0 deletions
diff --git a/fluent-bit/plugins/out_influxdb/influxdb.c b/fluent-bit/plugins/out_influxdb/influxdb.c
new file mode 100644
index 00000000..71e489fb
--- /dev/null
+++ b/fluent-bit/plugins/out_influxdb/influxdb.c
@@ -0,0 +1,682 @@
+/* -*- 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_output_plugin.h>
+#include <fluent-bit/flb_utils.h>
+#include <fluent-bit/flb_http_client.h>
+#include <fluent-bit/flb_time.h>
+#include <fluent-bit/flb_metrics.h>
+#include <fluent-bit/flb_log_event_decoder.h>
+
+#include <msgpack.h>
+
+#include "influxdb.h"
+#include "influxdb_bulk.h"
+
+#include <stdio.h>
+
+/*
+ * Returns FLB_TRUE when the specified key is in Tag_Keys list,
+ * otherwise FLB_FALSE
+ */
+static int is_tagged_key(struct flb_influxdb *ctx,
+ const char *key, int kl, int type);
+
+/*
+ * Increments the timestamp when it is duplicated
+ */
+static void influxdb_tsmod(struct flb_time *ts, struct flb_time *dupe,
+ struct flb_time *last) {
+ if (flb_time_equal(ts, last) || flb_time_equal(ts, dupe)) {
+ ++dupe->tm.tv_nsec;
+ flb_time_copy(last, ts);
+ flb_time_copy(ts, dupe);
+ }
+ else {
+ flb_time_copy(last, ts);
+ flb_time_copy(dupe, ts);
+ }
+}
+
+/*
+ * Convert the internal Fluent Bit data representation to the required one
+ * by InfluxDB.
+ */
+static char *influxdb_format(const char *tag, int tag_len,
+ const void *data, size_t bytes, size_t *out_size,
+ struct flb_influxdb *ctx)
+{
+ int i;
+ int ret;
+ int n_size;
+ uint64_t seq = 0;
+ char *buf;
+ char *str = NULL;
+ size_t str_size;
+ char tmp[128];
+ msgpack_object map;
+ struct flb_time tm;
+ struct influxdb_bulk *bulk = NULL;
+ struct influxdb_bulk *bulk_head = NULL;
+ struct influxdb_bulk *bulk_body = NULL;
+ struct flb_log_event_decoder log_decoder;
+ struct flb_log_event log_event;
+
+ ret = flb_log_event_decoder_init(&log_decoder, (char *) data, bytes);
+
+ if (ret != FLB_EVENT_DECODER_SUCCESS) {
+ flb_plg_error(ctx->ins,
+ "Log event decoder initialization error : %d", ret);
+
+ return NULL;
+ }
+
+ /* Create the bulk composer */
+ bulk = influxdb_bulk_create();
+ if (!bulk) {
+ goto error;
+ }
+
+ bulk_head = influxdb_bulk_create();
+ if (!bulk_head) {
+ goto error;
+ }
+
+ bulk_body = influxdb_bulk_create();
+ if (!bulk_body) {
+ goto error;
+ }
+
+ while ((ret = flb_log_event_decoder_next(
+ &log_decoder,
+ &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+ flb_time_copy(&tm, &log_event.timestamp);
+
+ map = *log_event.body;
+ n_size = map.via.map.size + 1;
+
+ seq = ctx->seq;
+ if (ctx->seq + 1 >= 100000) {
+ seq = 1;
+ }
+ else {
+ ctx->seq++;
+ }
+
+ ret = influxdb_bulk_append_header(bulk_head,
+ tag, tag_len,
+ seq,
+ ctx->seq_name, ctx->seq_len);
+ if (ret == -1) {
+ goto error;
+ }
+
+ for (i = 0; i < n_size - 1; i++) {
+ msgpack_object *k = &map.via.map.ptr[i].key;
+ msgpack_object *v = &map.via.map.ptr[i].val;
+
+ if (k->type != MSGPACK_OBJECT_BIN && k->type != MSGPACK_OBJECT_STR) {
+ continue;
+ }
+
+ int quote = FLB_FALSE;
+
+ /* key */
+ const char *key = NULL;
+ int key_len;
+
+ /* val */
+ const char *val = NULL;
+ int val_len;
+
+ if (k->type == MSGPACK_OBJECT_STR) {
+ key = k->via.str.ptr;
+ key_len = k->via.str.size;
+ }
+ else {
+ key = k->via.bin.ptr;
+ key_len = k->via.bin.size;
+ }
+
+ /* Store value */
+ if (v->type == MSGPACK_OBJECT_NIL) {
+ /* Missing values are Null by default in InfluxDB */
+ continue;
+ }
+ else if (v->type == MSGPACK_OBJECT_BOOLEAN) {
+ if (v->via.boolean) {
+ val = "TRUE";
+ val_len = 4;
+ }
+ else {
+ val = "FALSE";
+ val_len = 5;
+ }
+ }
+ else if (v->type == MSGPACK_OBJECT_POSITIVE_INTEGER) {
+ val = tmp;
+ val_len = snprintf(tmp, sizeof(tmp) - 1, "%" PRIu64, v->via.u64);
+ }
+ else if (v->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) {
+ val = tmp;
+ val_len = snprintf(tmp, sizeof(tmp) - 1, "%" PRId64, v->via.i64);
+ }
+ else if (v->type == MSGPACK_OBJECT_FLOAT || v->type == MSGPACK_OBJECT_FLOAT32) {
+ val = tmp;
+ val_len = snprintf(tmp, sizeof(tmp) - 1, "%f", v->via.f64);
+ }
+ else if (v->type == MSGPACK_OBJECT_STR) {
+ /* String value */
+ quote = FLB_TRUE;
+ val = v->via.str.ptr;
+ val_len = v->via.str.size;
+ }
+ else if (v->type == MSGPACK_OBJECT_BIN) {
+ /* Bin value */
+ quote = FLB_TRUE;
+ val = v->via.bin.ptr;
+ val_len = v->via.bin.size;
+ }
+
+ if (!val || !key) {
+ continue;
+ }
+
+ /* is this a string ? */
+ if (quote == FLB_TRUE) {
+ ret = flb_utils_write_str_buf(val, val_len,
+ &str, &str_size);
+ if (ret == -1) {
+ flb_errno();
+ goto error;
+ }
+
+ val = str;
+ val_len = str_size;
+ }
+
+ if (is_tagged_key(ctx, key, key_len, v->type)) {
+ /* Append key/value data into the bulk_head */
+ ret = influxdb_bulk_append_kv(bulk_head,
+ key, key_len,
+ val, val_len,
+ false);
+ }
+ else {
+ /* Append key/value data into the bulk_body */
+ ret = influxdb_bulk_append_kv(bulk_body,
+ key, key_len,
+ val, val_len,
+ quote);
+ }
+
+ if (quote == FLB_TRUE) {
+ flb_free(str);
+ str_size = 0;
+ }
+
+ if (ret == -1) {
+ flb_plg_error(ctx->ins, "cannot append key/value");
+ goto error;
+ }
+ }
+
+ /* Check have data fields */
+ if (bulk_body->len > 0) {
+ /* Modify timestamp in avoidance of duplication */
+ influxdb_tsmod(&tm, &ctx->ts_dupe, &ctx->ts_last);
+ /* Append the timestamp */
+ ret = influxdb_bulk_append_timestamp(bulk_body, &tm);
+ if (ret == -1) {
+ flb_plg_error(ctx->ins, "cannot append timestamp");
+ goto error;
+ }
+
+ /* Append collected data to final bulk */
+ if (influxdb_bulk_append_bulk(bulk, bulk_head, '\n') != 0 ||
+ influxdb_bulk_append_bulk(bulk, bulk_body, ' ') != 0) {
+ goto error;
+ }
+ }
+ else {
+ flb_plg_warn(ctx->ins, "skip send record, "
+ "since no record available "
+ "or all fields are tagged in record");
+ /* Following records maybe ok, so continue processing */
+ }
+
+ /* Reset bulk_head and bulk_body */
+ bulk_head->len = 0;
+ bulk_body->len = 0;
+ }
+
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ *out_size = bulk->len;
+ buf = bulk->ptr;
+
+ /*
+ * Note: we don't destroy the bulk as we need to keep the allocated
+ * buffer with the data. Instead we just release the bulk context and
+ * return the bulk->ptr buffer
+ */
+ flb_free(bulk);
+ influxdb_bulk_destroy(bulk_head);
+ influxdb_bulk_destroy(bulk_body);
+
+ return buf;
+
+error:
+ if (bulk != NULL) {
+ influxdb_bulk_destroy(bulk);
+ }
+ if (bulk_head != NULL) {
+ influxdb_bulk_destroy(bulk_head);
+ }
+ if (bulk_body != NULL) {
+ influxdb_bulk_destroy(bulk_body);
+ }
+
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ return NULL;
+}
+
+static int cb_influxdb_init(struct flb_output_instance *ins, struct flb_config *config,
+ void *data)
+{
+ int ret;
+ int io_flags = 0;
+ const char *tmp;
+ struct flb_upstream *upstream;
+ struct flb_influxdb *ctx;
+
+ /* Set default network configuration */
+ flb_output_net_default(FLB_INFLUXDB_HOST, FLB_INFLUXDB_PORT, ins);
+
+ /* Allocate plugin context */
+ ctx = flb_calloc(1, sizeof(struct flb_influxdb));
+ if (!ctx) {
+ flb_errno();
+ return -1;
+ }
+ ctx->ins = ins;
+
+ /* Register context with plugin instance */
+ flb_output_set_context(ins, ctx);
+
+ /*
+ * This plugin instance uses the HTTP client interface, let's register
+ * it debugging callbacks.
+ */
+ flb_output_set_http_debug_callbacks(ins);
+
+ /* Load config map */
+ ret = flb_output_config_map_set(ins, (void *) ctx);
+ if (ret == -1) {
+ return -1;
+ }
+
+ if (ins->use_tls == FLB_TRUE) {
+ io_flags = FLB_IO_TLS;
+ }
+ else {
+ io_flags = FLB_IO_TCP;
+ }
+
+ /* sequence tag */
+ tmp = flb_output_get_property("sequence_tag", ins);
+ if (!tmp) {
+ ctx->seq_name = flb_strdup("_seq");
+ }
+ else if (strcmp(tmp, "off") == 0) {
+ ctx->seq_name = flb_strdup("");
+ }
+ else {
+ ctx->seq_name = flb_strdup(tmp);
+ }
+ ctx->seq_len = strlen(ctx->seq_name);
+
+ if (ctx->custom_uri) {
+ /* custom URI endpoint (e.g: Grafana */
+ if (ctx->custom_uri[0] != '/') {
+ flb_plg_error(ctx->ins,
+ "'custom_uri' value must start wih a forward slash '/'");
+ return -1;
+ }
+ snprintf(ctx->uri, sizeof(ctx->uri) - 1, "%s", ctx->custom_uri);
+ }
+ else if (ctx->bucket) {
+ /* bucket: api v2 */
+ snprintf(ctx->uri, sizeof(ctx->uri) - 1,
+ "/api/v2/write?org=%s&bucket=%s&precision=ns",
+ ctx->organization, ctx->bucket);
+ }
+ else {
+ snprintf(ctx->uri, sizeof(ctx->uri) - 1,
+ "/write?db=%s&precision=n",
+ ctx->database);
+ }
+
+ if (ins->host.ipv6 == FLB_TRUE) {
+ io_flags |= FLB_IO_IPV6;
+ }
+
+
+ /* Tag_Keys */
+ tmp = flb_output_get_property("tag_keys", ins);
+ if (tmp) {
+ ctx->tag_keys = flb_utils_split(tmp, ' ', 256);
+ }
+ else {
+ ctx->tag_keys = NULL;
+ }
+
+ /* Prepare an upstream handler */
+ upstream = flb_upstream_create(config,
+ ins->host.name,
+ ins->host.port,
+ io_flags,
+ ins->tls);
+ if (!upstream) {
+ flb_free(ctx);
+ return -1;
+ }
+ ctx->u = upstream;
+ ctx->seq = 0;
+ flb_output_upstream_set(ctx->u, ins);
+
+ flb_time_zero(&ctx->ts_dupe);
+ flb_time_zero(&ctx->ts_last);
+
+ flb_plg_debug(ctx->ins, "host=%s port=%i", ins->host.name, ins->host.port);
+
+ return 0;
+}
+
+static int format_metrics(struct flb_output_instance *ins,
+ const void *data, size_t bytes,
+ char **out_buf, size_t *out_size)
+{
+ int ret;
+ size_t off = 0;
+ cfl_sds_t text;
+ struct cmt *cmt = NULL;
+
+ /* get cmetrics context */
+ ret = cmt_decode_msgpack_create(&cmt, (char *) data, bytes, &off);
+ if (ret != 0) {
+ flb_plg_error(ins, "could not process metrics payload");
+ return -1;
+ }
+
+ /* convert to text representation */
+ text = cmt_encode_influx_create(cmt);
+ if (!text) {
+ cmt_destroy(cmt);
+ return -1;
+ }
+
+ /* destroy cmt context */
+ cmt_destroy(cmt);
+
+ *out_buf = text;
+ *out_size = flb_sds_len(text);
+
+ return 0;
+}
+
+static void cb_influxdb_flush(struct flb_event_chunk *event_chunk,
+ struct flb_output_flush *out_flush,
+ struct flb_input_instance *i_ins,
+ void *out_context,
+ struct flb_config *config)
+{
+ int ret;
+ int out_ret = FLB_OK;
+ int is_metric = FLB_FALSE;
+ size_t b_sent;
+ size_t bytes_out;
+ char *pack;
+ char tmp[128];
+ struct mk_list *head;
+ struct flb_connection *u_conn;
+ struct flb_http_client *c;
+ struct flb_config_map_val *mv;
+ struct flb_slist_entry *key = NULL;
+ struct flb_slist_entry *val = NULL;
+ struct flb_influxdb *ctx = out_context;
+
+ /* Convert format: metrics / logs */
+ if (event_chunk->type == FLB_EVENT_TYPE_METRICS) {
+ /* format metrics */
+ ret = format_metrics(ctx->ins,
+ (char *) event_chunk->data,
+ event_chunk->size,
+ &pack, &bytes_out);
+ if (ret == -1) {
+ FLB_OUTPUT_RETURN(FLB_ERROR);
+ }
+ is_metric = FLB_TRUE;
+ }
+ else {
+ /* format logs */
+ pack = influxdb_format(event_chunk->tag, flb_sds_len(event_chunk->tag),
+ event_chunk->data, event_chunk->size,
+ &bytes_out, ctx);
+ if (!pack) {
+ FLB_OUTPUT_RETURN(FLB_ERROR);
+ }
+ }
+
+ /* Get upstream connection */
+ u_conn = flb_upstream_conn_get(ctx->u);
+ if (!u_conn) {
+ if (is_metric) {
+ cmt_encode_influx_destroy(pack);
+ }
+ else {
+ flb_free(pack);
+ }
+ FLB_OUTPUT_RETURN(FLB_RETRY);
+ }
+
+ /* Compose HTTP Client request */
+ c = flb_http_client(u_conn, FLB_HTTP_POST, ctx->uri,
+ pack, bytes_out, NULL, 0, NULL, 0);
+ flb_http_add_header(c, "User-Agent", 10, "Fluent-Bit", 10);
+
+ if (ctx->http_token) {
+ ret = snprintf(tmp, sizeof(tmp) - 1, "Token %s", ctx->http_token);
+ flb_http_add_header(c, FLB_HTTP_HEADER_AUTH, sizeof FLB_HTTP_HEADER_AUTH - 1, tmp, ret);
+ }
+ else if (ctx->http_user && ctx->http_passwd) {
+ flb_http_basic_auth(c, ctx->http_user, ctx->http_passwd);
+ }
+
+ /* Append custom headers if any */
+ flb_config_map_foreach(head, mv, ctx->headers) {
+ key = mk_list_entry_first(mv->val.list, struct flb_slist_entry, _head);
+ val = mk_list_entry_last(mv->val.list, struct flb_slist_entry, _head);
+
+ flb_http_add_header(c,
+ key->str, flb_sds_len(key->str),
+ val->str, flb_sds_len(val->str));
+ }
+
+ /* Map debug callbacks */
+ flb_http_client_debug(c, ctx->ins->callback);
+
+ ret = flb_http_do(c, &b_sent);
+ if (ret == 0) {
+ if (c->resp.status != 200 && c->resp.status != 204) {
+ if (c->resp.payload_size > 0) {
+ flb_plg_error(ctx->ins, "http_status=%i\n%s",
+ c->resp.status, c->resp.payload);
+ }
+ else {
+ flb_plg_debug(ctx->ins, "http_status=%i",
+ c->resp.status);
+ }
+ }
+ flb_plg_debug(ctx->ins, "http_do=%i OK", ret);
+ }
+ else {
+ flb_plg_error(ctx->ins, "http_do=%i", ret);
+ out_ret = FLB_RETRY;
+ }
+
+ flb_http_client_destroy(c);
+
+ if (is_metric) {
+ cmt_encode_influx_destroy(pack);
+ }
+ else {
+ flb_free(pack);
+ }
+
+ /* Release the connection */
+ flb_upstream_conn_release(u_conn);
+
+ FLB_OUTPUT_RETURN(out_ret);
+}
+
+static int cb_influxdb_exit(void *data, struct flb_config *config)
+{
+ struct flb_influxdb *ctx = data;
+
+ if (!ctx) {
+ return 0;
+ }
+
+ if (ctx->tag_keys) {
+ flb_utils_split_free(ctx->tag_keys);
+ }
+
+ flb_upstream_destroy(ctx->u);
+ flb_free(ctx);
+
+ return 0;
+}
+
+int is_tagged_key(struct flb_influxdb *ctx, const char *key, int kl, int type)
+{
+ if (type == MSGPACK_OBJECT_STR) {
+ if (ctx->auto_tags) {
+ return FLB_TRUE;
+ }
+ }
+
+ struct mk_list *head;
+ struct flb_split_entry *entry;
+
+ if (ctx->tag_keys) {
+ mk_list_foreach(head, ctx->tag_keys) {
+ entry = mk_list_entry(head, struct flb_split_entry, _head);
+ if (kl == entry->len && strncmp(key, entry->value, kl) == 0) {
+ return FLB_TRUE;
+ }
+ }
+ }
+
+ return FLB_FALSE;
+}
+
+/* Configuration properties map */
+static struct flb_config_map config_map[] = {
+ {
+ FLB_CONFIG_MAP_STR, "database", "fluentbit",
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, database),
+ "Set the database name."
+ },
+ {
+ FLB_CONFIG_MAP_STR, "bucket", NULL,
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, bucket),
+ "Specify the bucket name, used on InfluxDB API v2."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "org", "fluent",
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, organization),
+ "Set the Organization name."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "sequence_tag", NULL,
+ 0, FLB_FALSE, 0,
+ "Specify the sequence tag."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "uri", NULL,
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, custom_uri),
+ "Specify a custom URI endpoint (must start with '/')."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "http_user", NULL,
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, http_user),
+ "HTTP Basic Auth username."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "http_passwd", "",
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, http_passwd),
+ "HTTP Basic Auth password."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "http_token", NULL,
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, http_token),
+ "Set InfluxDB HTTP Token API v2."
+ },
+
+ {
+ FLB_CONFIG_MAP_SLIST_1, "http_header", NULL,
+ FLB_CONFIG_MAP_MULT, FLB_TRUE, offsetof(struct flb_influxdb, headers),
+ "Add a HTTP header key/value pair. Multiple headers can be set"
+ },
+
+ {
+ FLB_CONFIG_MAP_BOOL, "auto_tags", "false",
+ 0, FLB_TRUE, offsetof(struct flb_influxdb, auto_tags),
+ "Automatically tag keys where value is string."
+ },
+
+ {
+ FLB_CONFIG_MAP_BOOL, "tag_keys", NULL,
+ 0, FLB_FALSE, 0,
+ "Space separated list of keys that needs to be tagged."
+ },
+
+ /* EOF */
+ {0}
+};
+
+struct flb_output_plugin out_influxdb_plugin = {
+ .name = "influxdb",
+ .description = "InfluxDB Time Series",
+ .cb_init = cb_influxdb_init,
+ .cb_pre_run = NULL,
+ .cb_flush = cb_influxdb_flush,
+ .cb_exit = cb_influxdb_exit,
+ .config_map = config_map,
+ .flags = FLB_OUTPUT_NET | FLB_IO_OPT_TLS,
+ .event_type = FLB_OUTPUT_LOGS | FLB_OUTPUT_METRICS
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 09:52:37 +0000