forked from influxdata/telegraf
-
Notifications
You must be signed in to change notification settings - Fork 0
/
config.go
302 lines (230 loc) · 5.79 KB
/
config.go
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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
package telegraf
import (
"errors"
"fmt"
"io/ioutil"
"sort"
"strings"
"time"
"github.com/influxdb/telegraf/plugins"
"github.com/naoina/toml"
"github.com/naoina/toml/ast"
)
type Duration struct {
time.Duration
}
func (d *Duration) UnmarshalTOML(b []byte) error {
dur, err := time.ParseDuration(string(b[1 : len(b)-1]))
if err != nil {
return err
}
d.Duration = dur
return nil
}
type Config struct {
URL string
Username string
Password string
Database string
UserAgent string
Tags map[string]string
agent *ast.Table
plugins map[string]*ast.Table
}
func (c *Config) Plugins() map[string]*ast.Table {
return c.plugins
}
type ConfiguredPlugin struct {
Name string
Drop []string
Pass []string
Interval time.Duration
}
func (cp *ConfiguredPlugin) ShouldPass(measurement string) bool {
if cp.Pass != nil {
for _, pat := range cp.Pass {
if strings.HasPrefix(measurement, pat) {
return true
}
}
return false
}
if cp.Drop != nil {
for _, pat := range cp.Drop {
if strings.HasPrefix(measurement, pat) {
return false
}
}
return true
}
return true
}
func (c *Config) ApplyAgent(v interface{}) error {
if c.agent != nil {
return toml.UnmarshalTable(c.agent, v)
}
return nil
}
func (c *Config) ApplyPlugin(name string, v interface{}) (*ConfiguredPlugin, error) {
cp := &ConfiguredPlugin{Name: name}
if tbl, ok := c.plugins[name]; ok {
if node, ok := tbl.Fields["pass"]; ok {
if kv, ok := node.(*ast.KeyValue); ok {
if ary, ok := kv.Value.(*ast.Array); ok {
for _, elem := range ary.Value {
if str, ok := elem.(*ast.String); ok {
cp.Pass = append(cp.Pass, str.Value)
}
}
}
}
}
if node, ok := tbl.Fields["drop"]; ok {
if kv, ok := node.(*ast.KeyValue); ok {
if ary, ok := kv.Value.(*ast.Array); ok {
for _, elem := range ary.Value {
if str, ok := elem.(*ast.String); ok {
cp.Drop = append(cp.Drop, str.Value)
}
}
}
}
}
if node, ok := tbl.Fields["interval"]; ok {
if kv, ok := node.(*ast.KeyValue); ok {
if str, ok := kv.Value.(*ast.String); ok {
dur, err := time.ParseDuration(str.Value)
if err != nil {
return nil, err
}
cp.Interval = dur
}
}
}
delete(tbl.Fields, "drop")
delete(tbl.Fields, "pass")
delete(tbl.Fields, "interval")
return cp, toml.UnmarshalTable(tbl, v)
}
return cp, nil
}
func (c *Config) PluginsDeclared() []string {
var plugins []string
for name, _ := range c.plugins {
plugins = append(plugins, name)
}
sort.Strings(plugins)
return plugins
}
func DefaultConfig() *Config {
return &Config{}
}
var ErrInvalidConfig = errors.New("invalid configuration")
func LoadConfig(path string) (*Config, error) {
data, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
tbl, err := toml.Parse(data)
if err != nil {
return nil, err
}
c := &Config{
plugins: make(map[string]*ast.Table),
}
for name, val := range tbl.Fields {
subtbl, ok := val.(*ast.Table)
if !ok {
return nil, ErrInvalidConfig
}
switch name {
case "influxdb":
err := toml.UnmarshalTable(subtbl, c)
if err != nil {
return nil, err
}
case "agent":
c.agent = subtbl
default:
c.plugins[name] = subtbl
}
}
return c, nil
}
func (c *Config) ListTags() string {
var tags []string
for k, v := range c.Tags {
tags = append(tags, fmt.Sprintf("%s=%s", k, v))
}
sort.Strings(tags)
return strings.Join(tags, " ")
}
type hasConfig interface {
BasicConfig() string
}
type hasDescr interface {
Description() string
}
var header = `# Telegraf configuration
# If this file is missing an [agent] section, you must first generate a
# valid config with 'telegraf -sample-config > telegraf.toml'
# Telegraf is entirely plugin driven. All metrics are gathered from the
# declared plugins.
# Even if a plugin has no configuration, it must be declared in here
# to be active. Declaring a plugin means just specifying the name
# as a section with no variables. To deactivate a plugin, comment
# out the name and any variables.
# Use 'telegraf -config telegraf.toml -test' to see what metrics a config
# file would generate.
# One rule that plugins conform to is wherever a connection string
# can be passed, the values '' and 'localhost' are treated specially.
# They indicate to the plugin to use their own builtin configuration to
# connect to the local system.
# NOTE: The configuration has a few required parameters. They are marked
# with 'required'. Be sure to edit those to make this configuration work.
# Configuration for influxdb server to send metrics to
[influxdb]
# The full HTTP endpoint URL for your InfluxDB instance
url = "http://localhost:8086" # required.
# The target database for metrics. This database must already exist
database = "telegraf" # required.
# username = "telegraf"
# password = "metricsmetricsmetricsmetrics"
# Set the user agent for the POSTs (can be useful for log differentiation)
# user_agent = "telegraf"
# tags = { "dc": "us-east-1" }
# Tags can also be specified via a normal map, but only one form at a time:
# [influxdb.tags]
# dc = "us-east-1"
# Configuration for telegraf itself
# [agent]
# interval = "10s"
# debug = false
# hostname = "prod3241"
# PLUGINS
`
func PrintSampleConfig() {
fmt.Printf(header)
var names []string
for name, _ := range plugins.Plugins {
names = append(names, name)
}
sort.Strings(names)
for _, name := range names {
creator := plugins.Plugins[name]
plugin := creator()
fmt.Printf("# %s\n[%s]\n", plugin.Description(), name)
var config string
config = strings.TrimSpace(plugin.SampleConfig())
if config == "" {
fmt.Printf(" # no configuration\n\n")
} else {
fmt.Printf("\n")
lines := strings.Split(config, "\n")
for _, line := range lines {
fmt.Printf("%s\n", line)
}
fmt.Printf("\n")
}
}
}