diff options
Diffstat (limited to 'src/fluent-bit/plugins/out_opentelemetry/opentelemetry_conf.c')
| -rw-r--r-- | src/fluent-bit/plugins/out_opentelemetry/opentelemetry_conf.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/out_opentelemetry/opentelemetry_conf.c b/src/fluent-bit/plugins/out_opentelemetry/opentelemetry_conf.c new file mode 100644 index 000000000..5c9c8f82c --- /dev/null +++ b/src/fluent-bit/plugins/out_opentelemetry/opentelemetry_conf.c @@ -0,0 +1,262 @@ +/* -*- 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_pack.h> +#include <fluent-bit/flb_sds.h> +#include <fluent-bit/flb_kv.h> + +#include "opentelemetry.h" +#include "opentelemetry_conf.h" + +static int config_add_labels(struct flb_output_instance *ins, + struct opentelemetry_context *ctx) +{ + struct mk_list *head; + struct flb_config_map_val *mv; + struct flb_slist_entry *k = NULL; + struct flb_slist_entry *v = NULL; + struct flb_kv *kv; + + if (!ctx->add_labels || mk_list_size(ctx->add_labels) == 0) { + return 0; + } + + /* iterate all 'add_label' definitions */ + flb_config_map_foreach(head, mv, ctx->add_labels) { + if (mk_list_size(mv->val.list) != 2) { + flb_plg_error(ins, "'add_label' expects a key and a value, " + "e.g: 'add_label version 1.8.0'"); + return -1; + } + + k = mk_list_entry_first(mv->val.list, struct flb_slist_entry, _head); + v = mk_list_entry_last(mv->val.list, struct flb_slist_entry, _head); + + kv = flb_kv_item_create(&ctx->kv_labels, k->str, v->str); + if (!kv) { + flb_plg_error(ins, "could not append label %s=%s\n", k->str, v->str); + return -1; + } + } + + return 0; +} + +/* +* Check if a Proxy have been set, if so the Upstream manager will use +* the Proxy end-point and then we let the HTTP client know about it, so +* it can adjust the HTTP requests. +*/ + +static void check_proxy(struct flb_output_instance *ins, + struct opentelemetry_context *ctx, + char *host, char *port, + char *protocol, char *uri){ + + const char *tmp = NULL; + int ret; + tmp = flb_output_get_property("proxy", ins); + if (tmp) { + ret = flb_utils_url_split(tmp, &protocol, &host, &port, &uri); + if (ret == -1) { + flb_plg_error(ctx->ins, "could not parse proxy parameter: '%s'", tmp); + flb_free(ctx); + } + + ctx->proxy_host = host; + ctx->proxy_port = atoi(port); + ctx->proxy = tmp; + flb_free(protocol); + flb_free(port); + flb_free(uri); + uri = NULL; + } + else { + flb_output_net_default("127.0.0.1", 80, ins); + } +} + +static char *sanitize_uri(char *uri){ + char *new_uri; + int uri_len; + + if (uri == NULL) { + uri = flb_strdup("/"); + } + else if (uri[0] != '/') { + uri_len = strlen(uri); + new_uri = flb_calloc(uri_len + 2, sizeof(char)); + + if (new_uri != NULL) { + new_uri[0] = '/'; + + strncat(new_uri, uri, uri_len + 1); + } + + uri = new_uri; + } + + /* This function could return NULL if flb_calloc fails */ + + return uri; +} + +struct opentelemetry_context *flb_opentelemetry_context_create( + struct flb_output_instance *ins, struct flb_config *config) +{ + int ret; + int io_flags = 0; + char *protocol = NULL; + char *host = NULL; + char *port = NULL; + char *metrics_uri = NULL; + char *traces_uri = NULL; + char *logs_uri = NULL; + struct flb_upstream *upstream; + struct opentelemetry_context *ctx = NULL; + const char *tmp = NULL; + + /* Allocate plugin context */ + ctx = flb_calloc(1, sizeof(struct opentelemetry_context)); + if (!ctx) { + flb_errno(); + return NULL; + } + ctx->ins = ins; + mk_list_init(&ctx->kv_labels); + + ret = flb_output_config_map_set(ins, (void *) ctx); + if (ret == -1) { + flb_free(ctx); + return NULL; + } + + /* Parse 'add_label' */ + ret = config_add_labels(ins, ctx); + if (ret == -1) { + return NULL; + } + + check_proxy(ins, ctx, host, port, protocol, metrics_uri); + check_proxy(ins, ctx, host, port, protocol, logs_uri); + + /* Check if SSL/TLS is enabled */ +#ifdef FLB_HAVE_TLS + if (ins->use_tls == FLB_TRUE) { + io_flags = FLB_IO_TLS; + } + else { + io_flags = FLB_IO_TCP; + } +#else + io_flags = FLB_IO_TCP; +#endif + + if (ins->host.ipv6 == FLB_TRUE) { + io_flags |= FLB_IO_IPV6; + } + + if (ctx->proxy) { + flb_plg_trace(ctx->ins, "Upstream Proxy=%s:%i", + ctx->proxy_host, ctx->proxy_port); + upstream = flb_upstream_create(config, + ctx->proxy_host, + ctx->proxy_port, + io_flags, ins->tls); + } + else { + upstream = flb_upstream_create(config, + ins->host.name, + ins->host.port, + io_flags, ins->tls); + } + + if (!upstream) { + flb_free(ctx); + return NULL; + } + + logs_uri = sanitize_uri(ctx->logs_uri); + traces_uri = sanitize_uri(ctx->traces_uri); + metrics_uri = sanitize_uri(ctx->metrics_uri); + + ctx->u = upstream; + ctx->host = ins->host.name; + ctx->port = ins->host.port; + + if (logs_uri == NULL) { + flb_plg_trace(ctx->ins, + "Could not allocate memory for sanitized " + "log endpoint uri"); + } + else { + ctx->logs_uri = logs_uri; + } + + if (traces_uri == NULL) { + flb_plg_trace(ctx->ins, + "Could not allocate memory for sanitized " + "trace endpoint uri"); + } + else { + ctx->traces_uri = traces_uri; + } + + if (metrics_uri == NULL) { + flb_plg_trace(ctx->ins, + "Could not allocate memory for sanitized " + "metric endpoint uri"); + } + else { + ctx->metrics_uri = metrics_uri; + } + + + /* Set instance flags into upstream */ + flb_output_upstream_set(ctx->u, ins); + + tmp = flb_output_get_property("compress", ins); + ctx->compress_gzip = FLB_FALSE; + if (tmp) { + if (strcasecmp(tmp, "gzip") == 0) { + ctx->compress_gzip = FLB_TRUE; + } + } + + return ctx; +} + +void flb_opentelemetry_context_destroy( + struct opentelemetry_context *ctx) +{ + if (!ctx) { + return; + } + + flb_kv_release(&ctx->kv_labels); + + if (ctx->u) { + flb_upstream_destroy(ctx->u); + } + + flb_free(ctx->proxy_host); + flb_free(ctx); +} |