forked from influxdata/telegraf
-
Notifications
You must be signed in to change notification settings - Fork 0
/
docker.go
309 lines (268 loc) · 9.16 KB
/
docker.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
303
304
305
306
307
308
309
package system
import (
"fmt"
"strings"
"sync"
"time"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/fsouza/go-dockerclient"
)
type Docker struct {
Endpoint string
ContainerNames []string
client *docker.Client
}
var sampleConfig = `
# Docker Endpoint
# To use TCP, set endpoint = "tcp://[ip]:[port]"
# To use environment variables (ie, docker-machine), set endpoint = "ENV"
endpoint = "unix:///var/run/docker.sock"
# Only collect metrics for these containers, collect all if empty
container_names = []
`
func (d *Docker) Description() string {
return "Read metrics about docker containers"
}
func (d *Docker) SampleConfig() string { return sampleConfig }
func (d *Docker) Gather(acc inputs.Accumulator) error {
if d.client == nil {
var c *docker.Client
var err error
if d.Endpoint == "ENV" {
c, err = docker.NewClientFromEnv()
if err != nil {
return err
}
} else if d.Endpoint == "" {
c, err = docker.NewClient("unix:///var/run/docker.sock")
if err != nil {
return err
}
} else {
c, err = docker.NewClient(d.Endpoint)
if err != nil {
return err
}
}
d.client = c
}
opts := docker.ListContainersOptions{}
containers, err := d.client.ListContainers(opts)
if err != nil {
return err
}
var wg sync.WaitGroup
wg.Add(len(containers))
for _, container := range containers {
go func(c docker.APIContainers) {
defer wg.Done()
err := d.gatherContainer(c, acc)
if err != nil {
fmt.Println(err.Error())
}
}(container)
}
wg.Wait()
return nil
}
func (d *Docker) gatherContainer(
container docker.APIContainers,
acc inputs.Accumulator,
) error {
// Parse container name
cname := "unknown"
if len(container.Names) > 0 {
// Not sure what to do with other names, just take the first.
cname = strings.TrimPrefix(container.Names[0], "/")
}
tags := map[string]string{
"cont_id": container.ID,
"cont_name": cname,
"cont_image": container.Image,
}
if len(d.ContainerNames) > 0 {
if !sliceContains(cname, d.ContainerNames) {
return nil
}
}
statChan := make(chan *docker.Stats)
done := make(chan bool)
statOpts := docker.StatsOptions{
Stream: false,
ID: container.ID,
Stats: statChan,
Done: done,
Timeout: time.Duration(time.Second * 5),
}
go func() {
d.client.Stats(statOpts)
}()
stat := <-statChan
close(done)
// Add labels to tags
for k, v := range container.Labels {
tags[k] = v
}
gatherContainerStats(stat, acc, tags)
return nil
}
func gatherContainerStats(
stat *docker.Stats,
acc inputs.Accumulator,
tags map[string]string,
) {
now := stat.Read
memfields := map[string]interface{}{
"max_usage": stat.MemoryStats.MaxUsage,
"usage": stat.MemoryStats.Usage,
"fail_count": stat.MemoryStats.Failcnt,
"limit": stat.MemoryStats.Limit,
"total_pgmafault": stat.MemoryStats.Stats.TotalPgmafault,
"cache": stat.MemoryStats.Stats.Cache,
"mapped_file": stat.MemoryStats.Stats.MappedFile,
"total_inactive_file": stat.MemoryStats.Stats.TotalInactiveFile,
"pgpgout": stat.MemoryStats.Stats.Pgpgout,
"rss": stat.MemoryStats.Stats.Rss,
"total_mapped_file": stat.MemoryStats.Stats.TotalMappedFile,
"writeback": stat.MemoryStats.Stats.Writeback,
"unevictable": stat.MemoryStats.Stats.Unevictable,
"pgpgin": stat.MemoryStats.Stats.Pgpgin,
"total_unevictable": stat.MemoryStats.Stats.TotalUnevictable,
"pgmajfault": stat.MemoryStats.Stats.Pgmajfault,
"total_rss": stat.MemoryStats.Stats.TotalRss,
"total_rss_huge": stat.MemoryStats.Stats.TotalRssHuge,
"total_writeback": stat.MemoryStats.Stats.TotalWriteback,
"total_inactive_anon": stat.MemoryStats.Stats.TotalInactiveAnon,
"rss_huge": stat.MemoryStats.Stats.RssHuge,
"hierarchical_memory_limit": stat.MemoryStats.Stats.HierarchicalMemoryLimit,
"total_pgfault": stat.MemoryStats.Stats.TotalPgfault,
"total_active_file": stat.MemoryStats.Stats.TotalActiveFile,
"active_anon": stat.MemoryStats.Stats.ActiveAnon,
"total_active_anon": stat.MemoryStats.Stats.TotalActiveAnon,
"total_pgpgout": stat.MemoryStats.Stats.TotalPgpgout,
"total_cache": stat.MemoryStats.Stats.TotalCache,
"inactive_anon": stat.MemoryStats.Stats.InactiveAnon,
"active_file": stat.MemoryStats.Stats.ActiveFile,
"pgfault": stat.MemoryStats.Stats.Pgfault,
"inactive_file": stat.MemoryStats.Stats.InactiveFile,
"total_pgpgin": stat.MemoryStats.Stats.TotalPgpgin,
}
acc.AddFields("docker_mem", memfields, tags, now)
cpufields := map[string]interface{}{
"usage_total": stat.CPUStats.CPUUsage.TotalUsage,
"usage_in_usermode": stat.CPUStats.CPUUsage.UsageInUsermode,
"usage_in_kernelmode": stat.CPUStats.CPUUsage.UsageInKernelmode,
"usage_system": stat.CPUStats.SystemCPUUsage,
"throttling_periods": stat.CPUStats.ThrottlingData.Periods,
"throttling_throttled_periods": stat.CPUStats.ThrottlingData.ThrottledPeriods,
"throttling_throttled_time": stat.CPUStats.ThrottlingData.ThrottledTime,
}
cputags := copyTags(tags)
cputags["cpu"] = "cpu-total"
acc.AddFields("docker_cpu", cpufields, cputags, now)
for i, percpu := range stat.CPUStats.CPUUsage.PercpuUsage {
percputags := copyTags(tags)
percputags["cpu"] = fmt.Sprintf("cpu%d", i)
acc.AddFields("docker_cpu", map[string]interface{}{"usage_total": percpu}, percputags, now)
}
for network, netstats := range stat.Networks {
netfields := map[string]interface{}{
"rx_dropped": netstats.RxDropped,
"rx_bytes": netstats.RxBytes,
"rx_errors": netstats.RxErrors,
"tx_packets": netstats.TxPackets,
"tx_dropped": netstats.TxDropped,
"rx_packets": netstats.RxPackets,
"tx_errors": netstats.TxErrors,
"tx_bytes": netstats.TxBytes,
}
// Create a new network tag dictionary for the "network" tag
nettags := copyTags(tags)
nettags["network"] = network
acc.AddFields("docker_net", netfields, nettags, now)
}
gatherBlockIOMetrics(stat, acc, tags, now)
}
func gatherBlockIOMetrics(
stat *docker.Stats,
acc inputs.Accumulator,
tags map[string]string,
now time.Time,
) {
blkioStats := stat.BlkioStats
// Make a map of devices to their block io stats
deviceStatMap := make(map[string]map[string]interface{})
for _, metric := range blkioStats.IOServiceBytesRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
_, ok := deviceStatMap[device]
if !ok {
deviceStatMap[device] = make(map[string]interface{})
}
field := fmt.Sprintf("io_service_bytes_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOServicedRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
_, ok := deviceStatMap[device]
if !ok {
deviceStatMap[device] = make(map[string]interface{})
}
field := fmt.Sprintf("io_serviced_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOQueueRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("io_queue_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOServiceTimeRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("io_service_time_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOWaitTimeRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("io_wait_time_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOMergedRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("io_merged_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.IOTimeRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("io_time_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for _, metric := range blkioStats.SectorsRecursive {
device := fmt.Sprintf("%d:%d", metric.Major, metric.Minor)
field := fmt.Sprintf("sectors_recursive_%s", strings.ToLower(metric.Op))
deviceStatMap[device][field] = metric.Value
}
for device, fields := range deviceStatMap {
iotags := copyTags(tags)
iotags["device"] = device
acc.AddFields("docker_blkio", fields, iotags, now)
}
}
func copyTags(in map[string]string) map[string]string {
out := make(map[string]string)
for k, v := range in {
out[k] = v
}
return out
}
func sliceContains(in string, sl []string) bool {
for _, str := range sl {
if str == in {
return true
}
}
return false
}
func init() {
inputs.Add("docker", func() inputs.Input {
return &Docker{}
})
}