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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* -*- 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_time.h>
#include <fluent-bit/flb_log_event_decoder.h>
#include <msgpack.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
struct flb_plot {
const char *out_file;
flb_sds_t key;
struct flb_output_instance *ins;
};
static int cb_plot_init(struct flb_output_instance *ins,
struct flb_config *config,
void *data)
{
int ret;
(void) config;
(void) data;
struct flb_plot *ctx;
ctx = flb_calloc(1, sizeof(struct flb_plot));
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;
}
/* Set the context */
flb_output_set_context(ins, ctx);
return 0;
}
static void cb_plot_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 i;
int written;
int fd;
const char *out_file;
msgpack_object *map;
msgpack_object *key = NULL;
msgpack_object *val = NULL;
struct flb_plot *ctx = out_context;
struct flb_log_event_decoder log_decoder;
struct flb_log_event log_event;
int ret;
(void) i_ins;
(void) config;
/* Set the right output */
if (!ctx->out_file) {
out_file = event_chunk->tag;
}
else {
out_file = ctx->out_file;
}
/* Open output file with default name as the Tag */
fd = open(out_file, O_WRONLY | O_CREAT | O_APPEND, 0666);
if (fd == -1) {
flb_errno();
flb_plg_warn(ctx->ins, "could not open %s, switching to STDOUT",
out_file);
fd = STDOUT_FILENO;
}
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);
close(fd);
FLB_OUTPUT_RETURN(FLB_ERROR);
}
/*
* Upon flush, for each array, lookup the time and the first field
* of the map to use as a data point.
*/
while ((ret = flb_log_event_decoder_next(
&log_decoder,
&log_event)) == FLB_EVENT_DECODER_SUCCESS) {
map = log_event.body;
/*
* Lookup key, we need to iterate the whole map as sometimes the
* data that gets in can set the keys in different order (e.g: forward,
* tcp, etc).
*/
if (ctx->key) {
for (i = 0; i < map->via.map.size; i++) {
/* Get each key and compare */
key = &(map->via.map.ptr[i].key);
if (key->type == MSGPACK_OBJECT_BIN) {
if (flb_sds_len(ctx->key) == key->via.bin.size &&
memcmp(key->via.bin.ptr, ctx->key,
flb_sds_len(ctx->key)) == 0) {
val = &(map->via.map.ptr[i].val);
break;
}
key = NULL;
val = NULL;
}
else if (key->type == MSGPACK_OBJECT_STR) {
if (flb_sds_len(ctx->key) == key->via.str.size &&
memcmp(key->via.str.ptr, ctx->key,
flb_sds_len(ctx->key)) == 0) {
val = &(map->via.map.ptr[i].val);
break;
}
key = NULL;
val = NULL;
}
else {
if (fd != STDOUT_FILENO) {
close(fd);
}
flb_log_event_decoder_destroy(&log_decoder);
FLB_OUTPUT_RETURN(FLB_ERROR);
}
}
}
else {
val = &(map->via.map.ptr[0].val);
}
if (!val) {
flb_plg_error(ctx->ins, "unmatched key '%s'", ctx->key);
if (fd != STDOUT_FILENO) {
close(fd);
}
flb_log_event_decoder_destroy(&log_decoder);
FLB_OUTPUT_RETURN(FLB_ERROR);
}
if (val->type == MSGPACK_OBJECT_POSITIVE_INTEGER) {
written = dprintf(fd, "%f %" PRIu64 "\n",
flb_time_to_double(&log_event.timestamp), val->via.u64);
}
else if (val->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) {
written = dprintf(fd, "%f %" PRId64 "\n",
flb_time_to_double(&log_event.timestamp), val->via.i64);
}
else if (val->type == MSGPACK_OBJECT_FLOAT) {
written = dprintf(fd, "%f %lf\n",
flb_time_to_double(&log_event.timestamp), val->via.f64);
}
else {
flb_plg_error(ctx->ins, "value must be integer, negative integer "
"or float");
written = 0;
}
flb_plg_debug(ctx->ins, "%i bytes written to file '%s'",
written, out_file);
}
flb_log_event_decoder_destroy(&log_decoder);
if (fd != STDOUT_FILENO) {
close(fd);
}
FLB_OUTPUT_RETURN(FLB_OK);
}
static int cb_plot_exit(void *data, struct flb_config *config)
{
struct flb_plot *ctx = data;
flb_free(ctx);
return 0;
}
static struct flb_config_map config_map[] = {
{
FLB_CONFIG_MAP_STR, "key", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_plot, key),
"set a number of times to generate event."
},
{
FLB_CONFIG_MAP_STR, "file", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_plot, out_file),
"set a number of times to generate event."
},
/* EOF */
{0}
};
struct flb_output_plugin out_plot_plugin = {
.name = "plot",
.description = "Generate data file for GNU Plot",
.cb_init = cb_plot_init,
.cb_flush = cb_plot_flush,
.cb_exit = cb_plot_exit,
.config_map = config_map,
.flags = 0,
};
|
