1 files changed, 343 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/out_vivo_exporter/vivo.c b/src/fluent-bit/plugins/out_vivo_exporter/vivo.c
new file mode 100644
index 000000000..85e1e0159
--- /dev/null
+++ b/src/fluent-bit/plugins/out_vivo_exporter/vivo.c
@@ -0,0 +1,343 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2023 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_kv.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_log_event_decoder.h>
+#include <fluent-bit/flb_log_event_encoder.h>
+
+#include "vivo.h"
+#include "vivo_http.h"
+#include "vivo_stream.h"
+
+static flb_sds_t format_logs(struct flb_event_chunk *event_chunk)
+{
+    struct flb_log_event_decoder log_decoder;
+    struct flb_log_event log_event;
+    int result;
+    int i;
+    flb_sds_t out_js;
+    flb_sds_t out_buf = NULL;
+    msgpack_sbuffer tmp_sbuf;
+    msgpack_packer tmp_pck;
+
+    result = flb_log_event_decoder_init(&log_decoder,
+                                        (char *) event_chunk->data,
+                                        event_chunk->size);
+
+    if (result != FLB_EVENT_DECODER_SUCCESS) {
+        return NULL;
+    }
+
+    out_buf = flb_sds_create_size((event_chunk->size * 2) / 4);
+    if (!out_buf) {
+        flb_errno();
+        return NULL;
+    }
+
+    /* Create temporary msgpack buffer */
+    msgpack_sbuffer_init(&tmp_sbuf);
+    msgpack_packer_init(&tmp_pck, &tmp_sbuf, msgpack_sbuffer_write);
+
+    while ((result = flb_log_event_decoder_next(
+                        &log_decoder,
+                        &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+        /*
+         * If the caller specified FLB_PACK_JSON_DATE_FLUENT, we format the data
+         * by using the following structure:
+         *
+         * [[TIMESTAMP, {"_tag": "...", ...MORE_METADATA}], {RECORD CONTENT}]
+         */
+        msgpack_pack_array(&tmp_pck, 2);
+        msgpack_pack_array(&tmp_pck, 2);
+        msgpack_pack_uint64(&tmp_pck, flb_time_to_nanosec(&log_event.timestamp));
+
+        /* add tag only */
+        msgpack_pack_map(&tmp_pck, 1 + log_event.metadata->via.map.size);
+
+        msgpack_pack_str(&tmp_pck, 4);
+        msgpack_pack_str_body(&tmp_pck, "_tag", 4);
+
+        msgpack_pack_str(&tmp_pck, flb_sds_len(event_chunk->tag));
+        msgpack_pack_str_body(&tmp_pck, event_chunk->tag, flb_sds_len(event_chunk->tag));
+
+        /* Append remaining keys/values */
+        for (i = 0;
+             i < log_event.metadata->via.map.size;
+             i++) {
+            msgpack_pack_object(&tmp_pck,
+                                log_event.metadata->via.map.ptr[i].key);
+            msgpack_pack_object(&tmp_pck,
+                                log_event.metadata->via.map.ptr[i].val);
+        }
+
+        /* pack the remaining content */
+        msgpack_pack_map(&tmp_pck, log_event.body->via.map.size);
+
+        /* Append remaining keys/values */
+        for (i = 0;
+             i < log_event.body->via.map.size;
+             i++) {
+            msgpack_pack_object(&tmp_pck,
+                                log_event.body->via.map.ptr[i].key);
+            msgpack_pack_object(&tmp_pck,
+                                log_event.body->via.map.ptr[i].val);
+        }
+
+        /* Concatenate by using break lines */
+        out_js = flb_msgpack_raw_to_json_sds(tmp_sbuf.data, tmp_sbuf.size);
+        if (!out_js) {
+            flb_sds_destroy(out_buf);
+            msgpack_sbuffer_destroy(&tmp_sbuf);
+            flb_log_event_decoder_destroy(&log_decoder);
+            return NULL;
+        }
+
+        /*
+         * One map record has been converted, now append it to the
+         * outgoing out_buf sds variable.
+         */
+        flb_sds_cat_safe(&out_buf, out_js, flb_sds_len(out_js));
+        flb_sds_cat_safe(&out_buf, "\n", 1);
+
+        flb_sds_destroy(out_js);
+        msgpack_sbuffer_clear(&tmp_sbuf);
+    }
+
+    /* Release the unpacker */
+    flb_log_event_decoder_destroy(&log_decoder);
+
+    msgpack_sbuffer_destroy(&tmp_sbuf);
+
+    return out_buf;
+}
+
+static int logs_event_chunk_append(struct vivo_exporter *ctx,
+                                  struct flb_event_chunk *event_chunk)
+{
+    size_t len;
+    flb_sds_t json;
+    struct vivo_stream_entry *entry;
+
+
+    json = format_logs(event_chunk);
+    if (!json) {
+        flb_plg_error(ctx->ins, "cannot convert logs chunk to JSON");
+        return -1;
+    }
+
+    /* append content to the stream */
+    len = flb_sds_len(json);
+    entry = vivo_stream_append(ctx->stream_logs, json, len);
+
+    flb_sds_destroy(json);
+
+    if (!entry) {
+        flb_plg_error(ctx->ins, "cannot append JSON log to stream");
+        return -1;
+    }
+
+    return 0;
+}
+
+static int metrics_traces_event_chunk_append(struct vivo_exporter *ctx,
+                                             struct vivo_stream *vs,
+                                             struct flb_event_chunk *event_chunk)
+{
+    size_t len;
+    flb_sds_t json;
+    struct vivo_stream_entry *entry;
+
+    /* Convert msgpack to readable JSON format */
+    json = flb_msgpack_raw_to_json_sds(event_chunk->data, event_chunk->size);
+    if (!json) {
+        flb_plg_error(ctx->ins, "cannot convert metrics chunk to JSON");
+        return -1;
+    }
+
+    flb_sds_cat_safe(&json, "\n", 1);
+
+    /* append content to the stream */
+    len = flb_sds_len(json);
+    entry = vivo_stream_append(vs, json, len);
+
+    flb_sds_destroy(json);
+
+    if (!entry) {
+        flb_plg_error(ctx->ins, "cannot append JSON log to stream");
+        return -1;
+    }
+
+    return 0;
+}
+
+static int cb_vivo_init(struct flb_output_instance *ins,
+                        struct flb_config *config,
+                        void *data)
+{
+    int ret;
+    struct vivo_exporter *ctx;
+
+    flb_output_net_default("0.0.0.0", 2025 , ins);
+
+    ctx = flb_calloc(1, sizeof(struct vivo_exporter));
+    if (!ctx) {
+        flb_errno();
+        return -1;
+    }
+    ctx->ins = ins;
+
+    ret = flb_output_config_map_set(ins, (void *) ctx);
+    if (ret == -1) {
+        flb_free(ctx);
+        return -1;
+    }
+
+    flb_output_set_context(ins, ctx);
+
+    /* Load config map */
+    ret = flb_output_config_map_set(ins, (void *) ctx);
+    if (ret == -1) {
+        return -1;
+    }
+
+    /* Create Streams */
+    ctx->stream_logs = vivo_stream_create(ctx);
+    if (!ctx->stream_logs) {
+        return -1;
+    }
+
+    ctx->stream_metrics = vivo_stream_create(ctx);
+    if (!ctx->stream_metrics) {
+        return -1;
+    }
+
+    ctx->stream_traces = vivo_stream_create(ctx);
+    if (!ctx->stream_traces) {
+        return -1;
+    }
+
+    /* HTTP Server context */
+    ctx->http = vivo_http_server_create(ctx,
+                                        ins->host.name, ins->host.port, config);
+    if (!ctx->http) {
+        flb_plg_error(ctx->ins, "could not initialize HTTP server, aborting");
+        return -1;
+    }
+
+    /* Start HTTP Server */
+    ret = vivo_http_server_start(ctx->http);
+    if (ret == -1) {
+        return -1;
+    }
+
+    flb_plg_info(ctx->ins, "listening iface=%s tcp_port=%d",
+                 ins->host.name, ins->host.port);
+
+    return 0;
+}
+
+static void cb_vivo_flush(struct flb_event_chunk *event_chunk,
+                          struct flb_output_flush *out_flush,
+                          struct flb_input_instance *ins, void *out_context,
+                          struct flb_config *config)
+{
+    int ret = -1;
+    struct vivo_exporter *ctx = out_context;
+
+#ifdef FLB_HAVE_METRICS
+    if (event_chunk->type == FLB_EVENT_TYPE_METRICS) {
+        ret = metrics_traces_event_chunk_append(ctx, ctx->stream_metrics, event_chunk);
+    }
+#endif
+    if (event_chunk->type == FLB_EVENT_TYPE_LOGS) {
+        ret = logs_event_chunk_append(ctx, event_chunk);
+    }
+    else if (event_chunk->type == FLB_EVENT_TYPE_TRACES) {
+        ret = metrics_traces_event_chunk_append(ctx, ctx->stream_traces, event_chunk);
+    }
+
+    if (ret == 0) {
+        FLB_OUTPUT_RETURN(FLB_OK);
+    }
+
+    FLB_OUTPUT_RETURN(FLB_ERROR);
+}
+
+static int cb_vivo_exit(void *data, struct flb_config *config)
+{
+    struct vivo_exporter *ctx = data;
+
+    if (!ctx) {
+        return 0;
+    }
+
+    if (ctx->http) {
+        vivo_http_server_stop(ctx->http);
+        vivo_http_server_destroy(ctx->http);
+    }
+
+    vivo_stream_destroy(ctx->stream_logs);
+    vivo_stream_destroy(ctx->stream_metrics);
+    vivo_stream_destroy(ctx->stream_traces);
+
+    flb_free(ctx);
+
+    return 0;
+}
+
+/* Configuration properties map */
+static struct flb_config_map config_map[] = {
+    {
+     FLB_CONFIG_MAP_BOOL, "empty_stream_on_read", "off",
+     0, FLB_TRUE, offsetof(struct vivo_exporter, empty_stream_on_read),
+     "If enabled, when an HTTP client consumes the data from a stream, the queue "
+     "content will be removed"
+    },
+
+    {
+     FLB_CONFIG_MAP_SIZE, "stream_queue_size", "20M",
+     0, FLB_TRUE, offsetof(struct vivo_exporter, stream_queue_size),
+     "Specify the maximum queue size per stream. Each specific stream for logs, metrics "
+     "and traces can hold up to 'stream_queue_size' bytes."
+    },
+
+    {
+     FLB_CONFIG_MAP_STR, "http_cors_allow_origin", NULL,
+     0, FLB_TRUE, offsetof(struct vivo_exporter, http_cors_allow_origin),
+     "Specify the value for the HTTP Access-Control-Allow-Origin header (CORS)"
+    },
+
+    /* EOF */
+    {0}
+};
+
+/* Plugin reference */
+struct flb_output_plugin out_vivo_exporter_plugin = {
+    .name        = "vivo_exporter",
+    .description = "Vivo Exporter",
+    .cb_init     = cb_vivo_init,
+    .cb_flush    = cb_vivo_flush,
+    .cb_exit     = cb_vivo_exit,
+    .flags       = FLB_OUTPUT_NET,
+    .event_type  = FLB_OUTPUT_LOGS | FLB_OUTPUT_METRICS | FLB_OUTPUT_TRACES,
+    .config_map  = config_map,
+    .workers     = 1,
+};