diff options
Diffstat (limited to 'src/fluent-bit/plugins/out_prometheus_remote_write/remote_write_conf.c')
| -rw-r--r-- | src/fluent-bit/plugins/out_prometheus_remote_write/remote_write_conf.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/out_prometheus_remote_write/remote_write_conf.c b/src/fluent-bit/plugins/out_prometheus_remote_write/remote_write_conf.c new file mode 100644 index 000000000..09c7e0d52 --- /dev/null +++ b/src/fluent-bit/plugins/out_prometheus_remote_write/remote_write_conf.c @@ -0,0 +1,254 @@ +/* -*- 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> +#ifdef FLB_HAVE_SIGNV4 +#ifdef FLB_HAVE_AWS +#include <fluent-bit/flb_aws_credentials.h> +#endif +#endif +#include "remote_write.h" +#include "remote_write_conf.h" + +static int config_add_labels(struct flb_output_instance *ins, + struct prometheus_remote_write_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; +} + +struct prometheus_remote_write_context *flb_prometheus_remote_write_context_create( + struct flb_output_instance *ins, struct flb_config *config) +{ + int ret; + int ulen; + int io_flags = 0; + char *protocol = NULL; + char *host = NULL; + char *port = NULL; + char *uri = NULL; + char *tmp_uri = NULL; + const char *tmp; + struct flb_upstream *upstream; + struct prometheus_remote_write_context *ctx = NULL; + + /* Allocate plugin context */ + ctx = flb_calloc(1, sizeof(struct prometheus_remote_write_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 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. + */ + 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); + return NULL; + } + + 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); + } + + /* Check if AWS SigV4 authentication is enabled */ +#ifdef FLB_HAVE_SIGNV4 +#ifdef FLB_HAVE_AWS + if (ctx->has_aws_auth) { + if (!ctx->aws_service) { + flb_plg_error(ins, "aws_auth option requires " FLB_PROMETHEUS_REMOTE_WRITE_CREDENTIAL_PREFIX + "service to be set"); + flb_free(ctx); + return NULL; + } + + ctx->aws_provider = flb_managed_chain_provider_create( + ins, + config, + FLB_PROMETHEUS_REMOTE_WRITE_CREDENTIAL_PREFIX, + NULL, + flb_aws_client_generator() + ); + if (!ctx->aws_provider) { + flb_plg_error(ins, "failed to create aws credential provider for sigv4 auth"); + flb_free(ctx); + return NULL; + } + + /* If managed provider creation succeeds, then region key is present */ + ctx->aws_region = flb_output_get_property(FLB_PROMETHEUS_REMOTE_WRITE_CREDENTIAL_PREFIX + "region", ctx->ins); + } +#endif /* !FLB_HAVE_AWS */ +#endif /* !FLB_HAVE_SIGNV4 */ + + /* 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; + } + + if (ins->host.uri) { + uri = flb_strdup(ins->host.uri->full); + } + else { + tmp = flb_output_get_property("uri", ins); + if (tmp) { + uri = flb_strdup(tmp); + } + } + + if (!uri) { + uri = flb_strdup("/"); + } + else if (uri[0] != '/') { + ulen = strlen(uri); + tmp_uri = flb_malloc(ulen + 2); + tmp_uri[0] = '/'; + memcpy(tmp_uri + 1, uri, ulen); + tmp_uri[ulen + 1] = '\0'; + flb_free(uri); + uri = tmp_uri; + } + + ctx->u = upstream; + ctx->uri = uri; + ctx->host = ins->host.name; + ctx->port = ins->host.port; + + /* Set instance flags into upstream */ + flb_output_upstream_set(ctx->u, ins); + + return ctx; +} + +void flb_prometheus_remote_write_context_destroy( + struct prometheus_remote_write_context *ctx) +{ + if (!ctx) { + return; + } + + flb_kv_release(&ctx->kv_labels); + + if (ctx->u) { + flb_upstream_destroy(ctx->u); + } + +#ifdef FLB_HAVE_SIGNV4 +#ifdef FLB_HAVE_AWS + if (ctx->aws_provider) { + flb_aws_provider_destroy(ctx->aws_provider); + } +#endif +#endif + + flb_free(ctx->proxy_host); + flb_free(ctx->uri); + flb_free(ctx); +} |