1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
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,
};
|
