1 files changed, 116 insertions, 0 deletions
diff --git a/fluent-bit/plugins/out_retry/retry.c b/fluent-bit/plugins/out_retry/retry.c
new file mode 100644
index 00000000..cb8f4da8
--- /dev/null
+++ b/fluent-bit/plugins/out_retry/retry.c
@@ -0,0 +1,116 @@
+/* -*- 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_pack.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+
+/* Retry context, only works with one instance */
+struct retry_ctx {
+    int n_retry;                     /* max retries before real flush (OK) */
+    int count;                       /* number of retries done */
+    struct flb_output_instance *ins; /* plugin instance */
+};
+
+
+static int cb_retry_init(struct flb_output_instance *ins,
+                         struct flb_config *config,
+                         void *data)
+{
+    (void) config;
+    (void) data;
+    struct retry_ctx *ctx;
+    int ret;
+
+    ctx = flb_calloc(1, sizeof(struct retry_ctx));
+    if (!ctx) {
+        return -1;
+    }
+    ctx->ins = ins;
+    ctx->count = 0;
+
+    ret = flb_output_config_map_set(ins, ctx);
+    if (ret == -1) {
+        flb_plg_error(ins, "unable to load configuration");
+        return -1;
+    }
+
+    flb_output_set_context(ins, ctx);
+    return 0;
+}
+
+static void cb_retry_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)
+{
+    (void) i_ins;
+    (void) out_context;
+    (void) config;
+    struct retry_ctx *ctx;
+
+    ctx = out_context;
+    ctx->count++;
+
+    if (ctx->count <= ctx->n_retry) {
+        flb_plg_debug(ctx->ins, "retry %i/%i", ctx->count, ctx->n_retry);
+        FLB_OUTPUT_RETURN(FLB_RETRY);
+    }
+    else {
+        flb_plg_debug(ctx->ins, "flush", ctx->count, ctx->n_retry);
+        ctx->count = 0;
+    }
+
+    flb_pack_print(event_chunk->data, event_chunk->size);
+    FLB_OUTPUT_RETURN(FLB_OK);
+}
+
+static int cb_retry_exit(void *data, struct flb_config *config)
+{
+    struct retry_ctx *ctx = data;
+    (void) config;
+
+    flb_free(ctx);
+    return 0;
+}
+
+/* Configuration properties map */
+static struct flb_config_map config_map[] = {
+   {
+    FLB_CONFIG_MAP_INT, "retry", "3",
+    0, FLB_TRUE, offsetof(struct retry_ctx, n_retry),
+    "Number of retries."
+   },
+   {0}
+};
+
+struct flb_output_plugin out_retry_plugin = {
+    .name         = "retry",
+    .description  = "Issue a retry upon flush request",
+    .cb_init      = cb_retry_init,
+    .cb_flush     = cb_retry_flush,
+    .cb_exit      = cb_retry_exit,
+    .config_map   = config_map,
+    .flags        = 0,
+};