Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 658 insertions, 0 deletions

diff --git a/fluent-bit/plugins/out_kafka/kafka.c b/fluent-bit/plugins/out_kafka/kafka.c
new file mode 100644
index 000000000..ff700a687
--- /dev/null
+++ b/fluent-bit/plugins/out_kafka/kafka.c
@@ -0,0 +1,658 @@
+/* -*- 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_time.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_utils.h>
+#include <fluent-bit/flb_log_event_decoder.h>
+
+#include "kafka_config.h"
+#include "kafka_topic.h"
+
+void cb_kafka_msg(rd_kafka_t *rk, const rd_kafka_message_t *rkmessage,
+                  void *opaque)
+{
+    struct flb_out_kafka *ctx = (struct flb_out_kafka *) opaque;
+
+    if (rkmessage->err) {
+        flb_plg_warn(ctx->ins, "message delivery failed: %s",
+                     rd_kafka_err2str(rkmessage->err));
+    }
+    else {
+        flb_plg_debug(ctx->ins, "message delivered (%zd bytes, "
+                      "partition %"PRId32")",
+                      rkmessage->len, rkmessage->partition);
+    }
+}
+
+void cb_kafka_logger(const rd_kafka_t *rk, int level,
+                     const char *fac, const char *buf)
+{
+    struct flb_out_kafka *ctx;
+
+    ctx = (struct flb_out_kafka *) rd_kafka_opaque(rk);
+
+    if (level <= FLB_KAFKA_LOG_ERR) {
+        flb_plg_error(ctx->ins, "%s: %s",
+                      rk ? rd_kafka_name(rk) : NULL, buf);
+    }
+    else if (level == FLB_KAFKA_LOG_WARNING) {
+        flb_plg_warn(ctx->ins, "%s: %s",
+                     rk ? rd_kafka_name(rk) : NULL, buf);
+    }
+    else if (level == FLB_KAFKA_LOG_NOTICE || level == FLB_KAFKA_LOG_INFO) {
+        flb_plg_info(ctx->ins, "%s: %s",
+                     rk ? rd_kafka_name(rk) : NULL, buf);
+    }
+    else if (level == FLB_KAFKA_LOG_DEBUG) {
+        flb_plg_debug(ctx->ins, "%s: %s",
+                      rk ? rd_kafka_name(rk) : NULL, buf);
+    }
+}
+
+static int cb_kafka_init(struct flb_output_instance *ins,
+                         struct flb_config *config,
+                         void *data)
+{
+    struct flb_out_kafka *ctx;
+
+    /* Configuration */
+    ctx = flb_out_kafka_create(ins, config);
+    if (!ctx) {
+        flb_plg_error(ins, "failed to initialize");
+        return -1;
+    }
+
+    /* Set global context */
+    flb_output_set_context(ins, ctx);
+    return 0;
+}
+
+int produce_message(struct flb_time *tm, msgpack_object *map,
+                    struct flb_out_kafka *ctx, struct flb_config *config)
+{
+    int i;
+    int ret;
+    int size;
+    int queue_full_retries = 0;
+    char *out_buf;
+    size_t out_size;
+    struct mk_list *head;
+    struct mk_list *topics;
+    struct flb_split_entry *entry;
+    char *dynamic_topic;
+    char *message_key = NULL;
+    size_t message_key_len = 0;
+    struct flb_kafka_topic *topic = NULL;
+    msgpack_sbuffer mp_sbuf;
+    msgpack_packer mp_pck;
+    msgpack_object key;
+    msgpack_object val;
+    flb_sds_t s;
+
+#ifdef FLB_HAVE_AVRO_ENCODER
+    // used to flag when a buffer needs to be freed for avro
+    bool avro_fast_buffer = true;
+
+    // avro encoding uses a buffer
+    // the majority of lines are fairly small
+    // so using static buffer for these is much more efficient
+    // larger sizes will allocate
+#ifndef AVRO_DEFAULT_BUFFER_SIZE
+#define AVRO_DEFAULT_BUFFER_SIZE 2048
+#endif
+    static char avro_buff[AVRO_DEFAULT_BUFFER_SIZE];
+
+    // don't take lines that are too large
+    // these lines will log a warning
+    // this roughly a log line of 250000 chars
+#ifndef AVRO_LINE_MAX_LEN
+#define AVRO_LINE_MAX_LEN 1000000
+
+    // this is a convenience
+#define AVRO_FREE(X, Y) if (!X) { flb_free(Y); }
+#endif
+
+    // this is just to keep the code cleaner
+    // the avro encoding includes
+    // an embedded schemaid which is used
+    // the embedding is a null byte
+    // followed by a 16 byte schemaid
+#define AVRO_SCHEMA_OVERHEAD 16 + 1
+#endif
+
+    flb_debug("in produce_message\n");
+    if (flb_log_check(FLB_LOG_DEBUG))
+        msgpack_object_print(stderr, *map);
+
+    /* Init temporal buffers */
+    msgpack_sbuffer_init(&mp_sbuf);
+    msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
+
+    if (ctx->format == FLB_KAFKA_FMT_JSON || ctx->format == FLB_KAFKA_FMT_MSGP) {
+        /* Make room for the timestamp */
+        size = map->via.map.size + 1;
+        msgpack_pack_map(&mp_pck, size);
+
+        /* Pack timestamp */
+        msgpack_pack_str(&mp_pck, ctx->timestamp_key_len);
+        msgpack_pack_str_body(&mp_pck,
+                              ctx->timestamp_key, ctx->timestamp_key_len);
+        switch (ctx->timestamp_format) {
+            case FLB_JSON_DATE_DOUBLE:
+                msgpack_pack_double(&mp_pck, flb_time_to_double(tm));
+                break;
+
+            case FLB_JSON_DATE_ISO8601:
+            case FLB_JSON_DATE_ISO8601_NS:
+                {
+                size_t date_len;
+                int len;
+                struct tm _tm;
+                char time_formatted[36];
+
+                /* Format the time; use microsecond precision (not nanoseconds). */
+                gmtime_r(&tm->tm.tv_sec, &_tm);
+                date_len = strftime(time_formatted, sizeof(time_formatted) - 1,
+                             FLB_JSON_DATE_ISO8601_FMT, &_tm);
+
+                if (ctx->timestamp_format == FLB_JSON_DATE_ISO8601) {
+                    len = snprintf(time_formatted + date_len, sizeof(time_formatted) - 1 - date_len,
+                                   ".%06" PRIu64 "Z", (uint64_t) tm->tm.tv_nsec / 1000);
+                }
+                else {
+                    /* FLB_JSON_DATE_ISO8601_NS */
+                    len = snprintf(time_formatted + date_len, sizeof(time_formatted) - 1 - date_len,
+                                   ".%09" PRIu64 "Z", (uint64_t) tm->tm.tv_nsec);
+                }
+                date_len += len;
+
+                msgpack_pack_str(&mp_pck, date_len);
+                msgpack_pack_str_body(&mp_pck, time_formatted, date_len);
+                }
+                break;
+        }
+    }
+    else {
+        size = map->via.map.size;
+        msgpack_pack_map(&mp_pck, size);
+    }
+
+    for (i = 0; i < map->via.map.size; i++) {
+        key = map->via.map.ptr[i].key;
+        val = map->via.map.ptr[i].val;
+
+        msgpack_pack_object(&mp_pck, key);
+        msgpack_pack_object(&mp_pck, val);
+
+        /* Lookup message key */
+        if (ctx->message_key_field && !message_key && val.type == MSGPACK_OBJECT_STR) {
+            if (key.via.str.size == ctx->message_key_field_len &&
+                    strncmp(key.via.str.ptr, ctx->message_key_field, ctx->message_key_field_len) == 0) {
+                message_key = (char *) val.via.str.ptr;
+                message_key_len = val.via.str.size;
+            }
+        }
+
+        /* Lookup key/topic */
+        if (ctx->topic_key && !topic && val.type == MSGPACK_OBJECT_STR) {
+            if (key.via.str.size == ctx->topic_key_len &&
+                strncmp(key.via.str.ptr, ctx->topic_key, ctx->topic_key_len) == 0) {
+                topic = flb_kafka_topic_lookup((char *) val.via.str.ptr,
+                                               val.via.str.size, ctx);
+                /* Add extracted topic on the fly to topiclist */
+                if (ctx->dynamic_topic) {
+                    /* Only if default topic is set and this topicname is not set for this message */
+                    if (strncmp(topic->name, flb_kafka_topic_default(ctx)->name, val.via.str.size) == 0 &&
+                        (strncmp(topic->name, val.via.str.ptr, val.via.str.size) != 0) ) {
+                        if (memchr(val.via.str.ptr, ',', val.via.str.size)) {
+                            /* Don't allow commas in kafkatopic name */
+                            flb_warn("',' not allowed in dynamic_kafka topic names");
+                            continue;
+                        }
+                        if (val.via.str.size > 64) {
+                            /* Don't allow length of dynamic kafka topics > 64 */
+                            flb_warn(" dynamic kafka topic length > 64 not allowed");
+                            continue;
+                        }
+                        dynamic_topic = flb_malloc(val.via.str.size + 1);
+                        if (!dynamic_topic) {
+                            /* Use default topic */
+                            flb_errno();
+                            continue;
+                        }
+                        strncpy(dynamic_topic, val.via.str.ptr, val.via.str.size);
+                        dynamic_topic[val.via.str.size] = '\0';
+                        topics = flb_utils_split(dynamic_topic, ',', 0);
+                        if (!topics) {
+                            /* Use the default topic */
+                            flb_errno();
+                            flb_free(dynamic_topic);
+                            continue;
+                        }
+                        mk_list_foreach(head, topics) {
+                            /* Add the (one) found topicname to the topic configuration */
+                            entry = mk_list_entry(head, struct flb_split_entry, _head);
+                            topic = flb_kafka_topic_create(entry->value, ctx);
+                            if (!topic) {
+                                /* Use default topic  */
+                                flb_error("[out_kafka] cannot register topic '%s'",
+                                          entry->value);
+                                topic = flb_kafka_topic_lookup((char *) val.via.str.ptr,
+                                                               val.via.str.size, ctx);
+                            }
+                            else {
+                                flb_info("[out_kafka] new topic added: %s", dynamic_topic);
+                            }
+                        }
+                        flb_free(dynamic_topic);
+                    }
+                }
+            }
+        }
+    }
+
+    if (ctx->format == FLB_KAFKA_FMT_JSON) {
+        s = flb_msgpack_raw_to_json_sds(mp_sbuf.data, mp_sbuf.size);
+        if (!s) {
+            flb_plg_error(ctx->ins, "error encoding to JSON");
+            msgpack_sbuffer_destroy(&mp_sbuf);
+            return FLB_ERROR;
+        }
+        out_buf  = s;
+        out_size = flb_sds_len(out_buf);
+    }
+    else if (ctx->format == FLB_KAFKA_FMT_MSGP) {
+        out_buf = mp_sbuf.data;
+        out_size = mp_sbuf.size;
+    }
+    else if (ctx->format == FLB_KAFKA_FMT_GELF) {
+        s = flb_msgpack_raw_to_gelf(mp_sbuf.data, mp_sbuf.size,
+                                    tm, &(ctx->gelf_fields));
+        if (s == NULL) {
+            flb_plg_error(ctx->ins, "error encoding to GELF");
+            msgpack_sbuffer_destroy(&mp_sbuf);
+            return FLB_ERROR;
+        }
+        out_buf = s;
+        out_size = flb_sds_len(s);
+    }
+#ifdef FLB_HAVE_AVRO_ENCODER
+    else if (ctx->format == FLB_KAFKA_FMT_AVRO) {
+
+        flb_plg_debug(ctx->ins, "avro schema ID:%s:\n", ctx->avro_fields.schema_id);
+        flb_plg_debug(ctx->ins, "avro schema string:%s:\n", ctx->avro_fields.schema_str);
+
+	// if there's no data then log it and return
+        if (mp_sbuf.size == 0) {
+            flb_plg_error(ctx->ins, "got zero bytes decoding to avro AVRO:schemaID:%s:\n", ctx->avro_fields.schema_id);
+            msgpack_sbuffer_destroy(&mp_sbuf);
+            return FLB_OK;
+        }
+
+	// is the line is too long log it and return
+        if (mp_sbuf.size > AVRO_LINE_MAX_LEN) {
+            flb_plg_warn(ctx->ins, "skipping long line AVRO:len:%zu:limit:%zu:schemaID:%s:\n", (size_t)mp_sbuf.size, (size_t)AVRO_LINE_MAX_LEN, ctx->avro_fields.schema_id);
+            msgpack_sbuffer_destroy(&mp_sbuf);
+            return FLB_OK;
+        }
+
+        flb_plg_debug(ctx->ins, "using default buffer AVRO:len:%zu:limit:%zu:schemaID:%s:\n", (size_t)mp_sbuf.size, (size_t)AVRO_DEFAULT_BUFFER_SIZE, ctx->avro_fields.schema_id);
+        out_buf = avro_buff;
+        out_size = AVRO_DEFAULT_BUFFER_SIZE;
+
+	if (mp_sbuf.size + AVRO_SCHEMA_OVERHEAD >= AVRO_DEFAULT_BUFFER_SIZE) {
+            flb_plg_info(ctx->ins, "upsizing to dynamic buffer AVRO:len:%zu:schemaID:%s:\n", (size_t)mp_sbuf.size, ctx->avro_fields.schema_id);
+            avro_fast_buffer = false;
+            // avro will always be  smaller than msgpack
+            // it contains no meta-info aside from the schemaid
+            // all the metadata is in the schema which is not part of the msg
+            // add schemaid + magic byte for safety buffer and allocate
+            // that's 16 byte schemaid and one byte magic byte
+            out_size = mp_sbuf.size + AVRO_SCHEMA_OVERHEAD;
+            out_buf = flb_malloc(out_size);
+            if (!out_buf) {
+                flb_plg_error(ctx->ins, "error allocating memory for decoding to AVRO:schema:%s:schemaID:%s:\n", ctx->avro_fields.schema_str, ctx->avro_fields.schema_id);
+                msgpack_sbuffer_destroy(&mp_sbuf);
+                return FLB_ERROR;
+            }
+	}
+
+        if(!flb_msgpack_raw_to_avro_sds(mp_sbuf.data, mp_sbuf.size, &ctx->avro_fields, out_buf, &out_size)) {
+            flb_plg_error(ctx->ins, "error encoding to AVRO:schema:%s:schemaID:%s:\n", ctx->avro_fields.schema_str, ctx->avro_fields.schema_id);
+            msgpack_sbuffer_destroy(&mp_sbuf);
+            if (!avro_fast_buffer) {
+                flb_free(out_buf);
+	    }
+            return FLB_ERROR;
+        }
+
+    }
+#endif
+
+    if (!message_key) {
+        message_key = ctx->message_key;
+        message_key_len = ctx->message_key_len;
+    }
+
+    if (!topic) {
+        topic = flb_kafka_topic_default(ctx);
+    }
+    if (!topic) {
+        flb_plg_error(ctx->ins, "no default topic found");
+        msgpack_sbuffer_destroy(&mp_sbuf);
+#ifdef FLB_HAVE_AVRO_ENCODER
+        if (ctx->format == FLB_KAFKA_FMT_AVRO) {
+            AVRO_FREE(avro_fast_buffer, out_buf)
+        }
+#endif
+        return FLB_ERROR;
+    }
+
+ retry:
+    /*
+     * If the local rdkafka queue is full, we retry up to 'queue_full_retries'
+     * times set by the configuration (default: 10). If the configuration
+     * property was set to '0' or 'false', we don't impose a limit. Use that
+     * value under your own risk.
+     */
+    if (ctx->queue_full_retries > 0 &&
+        queue_full_retries >= ctx->queue_full_retries) {
+        if (ctx->format != FLB_KAFKA_FMT_MSGP) {
+            flb_sds_destroy(s);
+        }
+        msgpack_sbuffer_destroy(&mp_sbuf);
+#ifdef FLB_HAVE_AVRO_ENCODER
+        if (ctx->format == FLB_KAFKA_FMT_AVRO) {
+            AVRO_FREE(avro_fast_buffer, out_buf)
+        }
+#endif
+        /*
+         * Unblock the flush requests so that the
+         * engine could try sending data again.
+         */
+        ctx->blocked = FLB_FALSE;
+        return FLB_RETRY;
+    }
+
+    ret = rd_kafka_produce(topic->tp,
+                           RD_KAFKA_PARTITION_UA,
+                           RD_KAFKA_MSG_F_COPY,
+                           out_buf, out_size,
+                           message_key, message_key_len,
+                           ctx);
+
+    if (ret == -1) {
+        flb_error(
+                "%% Failed to produce to topic %s: %s\n",
+                rd_kafka_topic_name(topic->tp),
+                rd_kafka_err2str(rd_kafka_last_error()));
+
+        /*
+         * rdkafka queue is full, keep trying 'locally' for a few seconds,
+         * otherwise let the caller to issue a main retry againt the engine.
+         */
+        if (rd_kafka_last_error() == RD_KAFKA_RESP_ERR__QUEUE_FULL) {
+            flb_plg_warn(ctx->ins,
+                         "internal queue is full, retrying in one second");
+
+            /*
+             * If the queue is full, first make sure to discard any further
+             * flush request from the engine. This means 'the caller will
+             * issue a retry at a later time'.
+             */
+            ctx->blocked = FLB_TRUE;
+
+            /*
+             * Next step is to give it some time to the background rdkafka
+             * library to do it own work. By default rdkafka wait 1 second
+             * or up to 10000 messages to be enqueued before delivery.
+             *
+             * If the kafka broker is down we should try a couple of times
+             * to enqueue this message, if we exceed 10 times, we just
+             * issue a full retry of the data chunk.
+             */
+            flb_time_sleep(1000);
+            rd_kafka_poll(ctx->kafka.rk, 0);
+
+            /* Issue a re-try */
+            queue_full_retries++;
+            goto retry;
+        }
+    }
+    else {
+        flb_plg_debug(ctx->ins, "enqueued message (%zd bytes) for topic '%s'",
+                      out_size, rd_kafka_topic_name(topic->tp));
+    }
+    ctx->blocked = FLB_FALSE;
+
+    rd_kafka_poll(ctx->kafka.rk, 0);
+    if (ctx->format == FLB_KAFKA_FMT_JSON) {
+        flb_sds_destroy(s);
+    }
+    if (ctx->format == FLB_KAFKA_FMT_GELF) {
+        flb_sds_destroy(s);
+    }
+#ifdef FLB_HAVE_AVRO_ENCODER
+    if (ctx->format == FLB_KAFKA_FMT_AVRO) {
+        AVRO_FREE(avro_fast_buffer, out_buf)
+    }
+#endif
+
+    msgpack_sbuffer_destroy(&mp_sbuf);
+    return FLB_OK;
+}
+
+static void cb_kafka_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;
+    struct flb_out_kafka *ctx = out_context;
+    struct flb_log_event_decoder log_decoder;
+    struct flb_log_event log_event;
+
+    /*
+     * If the context is blocked, means rdkafka queue is full and no more
+     * messages can be appended. For our called (Fluent Bit engine) means
+     * that is not possible to work on this now and it need to 'retry'.
+     */
+    if (ctx->blocked == FLB_TRUE) {
+        FLB_OUTPUT_RETURN(FLB_RETRY);
+    }
+
+    ret = flb_log_event_decoder_init(&log_decoder,
+                                     (char *) event_chunk->data,
+                                     event_chunk->size);
+
+    if (ret != FLB_EVENT_DECODER_SUCCESS) {
+        flb_plg_error(ctx->ins,
+                      "Log event decoder initialization error : %d", ret);
+
+        FLB_OUTPUT_RETURN(FLB_RETRY);
+    }
+
+    /* Iterate the original buffer and perform adjustments */
+    while ((ret = flb_log_event_decoder_next(
+                    &log_decoder,
+                    &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+        ret = produce_message(&log_event.timestamp,
+                              log_event.body,
+                              ctx, config);
+
+        if (ret != FLB_OK) {
+            flb_log_event_decoder_destroy(&log_decoder);
+
+            FLB_OUTPUT_RETURN(ret);
+        }
+    }
+
+    flb_log_event_decoder_destroy(&log_decoder);
+
+    FLB_OUTPUT_RETURN(FLB_OK);
+}
+
+static void kafka_flush_force(struct flb_out_kafka *ctx,
+                              struct flb_config *config)
+{
+    int ret;
+
+    if (!ctx) {
+        return;
+    }
+
+    if (ctx->kafka.rk) {
+        ret = rd_kafka_flush(ctx->kafka.rk, config->grace * 1000);
+        if (ret != RD_KAFKA_RESP_ERR_NO_ERROR) {
+            flb_plg_warn(ctx->ins, "Failed to force flush: %s",
+                         rd_kafka_err2str(ret));
+        }
+    }
+}
+
+static int cb_kafka_exit(void *data, struct flb_config *config)
+{
+    struct flb_out_kafka *ctx = data;
+
+    kafka_flush_force(ctx, config);
+    flb_out_kafka_destroy(ctx);
+    return 0;
+}
+
+static struct flb_config_map config_map[] = {
+   {
+    FLB_CONFIG_MAP_STR, "topic_key", (char *)NULL,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, topic_key),
+    "Which record to use as the kafka topic."
+   },
+   {
+    FLB_CONFIG_MAP_BOOL, "dynamic_topic", "false",
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, dynamic_topic),
+    "Activate dynamic topics."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "format", (char *)NULL,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, format_str),
+    "Set the record output format."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "message_key", (char *)NULL,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, message_key),
+    "Which record key to use as the message data."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "message_key_field", (char *)NULL,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, message_key_field),
+    "Which record key field to use as the message data."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "timestamp_key", FLB_KAFKA_TS_KEY,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, timestamp_key),
+    "Set the key for the the timestamp."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "timestamp_format", (char *)NULL,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, timestamp_format_str),
+    "Set the format the timestamp is in."
+   },
+   {
+    FLB_CONFIG_MAP_INT, "queue_full_retries", FLB_KAFKA_QUEUE_FULL_RETRIES,
+    0, FLB_TRUE, offsetof(struct flb_out_kafka, queue_full_retries),
+    "Set the number of local retries to enqueue the data."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "gelf_timestamp_key", (char *)NULL,
+    0, FLB_FALSE,  0,
+    "Set the timestamp key for gelf  output."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "gelf_host_key", (char *)NULL,
+    0, FLB_FALSE,  0,
+    "Set the host key for gelf  output."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "gelf_short_message_key", (char *)NULL,
+    0, FLB_FALSE,  0,
+    "Set the short message key for gelf  output."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "gelf_full_message_key", (char *)NULL,
+    0, FLB_FALSE,  0,
+    "Set the full message key for gelf  output."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "gelf_level_key", (char *)NULL,
+    0, FLB_FALSE,  0,
+    "Set the level key for gelf  output."
+   },
+#ifdef FLB_HAVE_AVRO_ENCODER
+   {
+    FLB_CONFIG_MAP_STR, "schema_str", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set AVRO schema."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "schema_id", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set AVRO schema ID."
+   },
+#endif
+   {
+    FLB_CONFIG_MAP_STR, "topics", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set the kafka topics, delimited by commas."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "brokers", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set the kafka brokers, delimited by commas."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "client_id", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set the kafka client_id."
+   },
+   {
+    FLB_CONFIG_MAP_STR, "group_id", (char *)NULL,
+    0, FLB_FALSE, 0,
+    "Set the kafka group_id."
+   },
+   {
+    FLB_CONFIG_MAP_STR_PREFIX, "rdkafka.", NULL,
+    //FLB_CONFIG_MAP_MULT, FLB_TRUE, offsetof(struct flb_out_kafka, rdkafka_opts),
+    0,  FLB_FALSE, 0,
+    "Set the kafka group_id."
+   },
+   /* EOF */
+   {0}
+};
+
+struct flb_output_plugin out_kafka_plugin = {
+    .name         = "kafka",
+    .description  = "Kafka",
+    .cb_init      = cb_kafka_init,
+    .cb_flush     = cb_kafka_flush,
+    .cb_exit      = cb_kafka_exit,
+    .config_map   = config_map,
+    .flags        = 0
+};