forked from openshift/origin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
log_size_monitoring.go
267 lines (239 loc) · 7.45 KB
/
log_size_monitoring.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
/*
Copyright 2015 The Kubernetes Authors All rights reserved.
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.
*/
package e2e
import (
"bytes"
"fmt"
"strconv"
"strings"
"sync"
"text/tabwriter"
"time"
client "k8s.io/kubernetes/pkg/client/unversioned"
)
const (
// Minimal period between polling log sizes from components
pollingPeriod = 60 * time.Second
workersNo = 5
kubeletLogsPath = "/var/log/kubelet.log"
kubeProxyLogsPath = "/var/log/kube-proxy.log"
kubeAddonsLogsPath = "/var/log/kube-addons.log"
kubeMasterAddonsLogsPath = "/var/log/kube-master-addons.log"
apiServerLogsPath = "/var/log/kube-apiserver.log"
controllersLogsPath = "/var/log/kube-controller-manager.log"
schedulerLogsPath = "/var/log/kube-scheduler.log"
)
var (
nodeLogsToCheck = []string{kubeletLogsPath, kubeProxyLogsPath}
masterLogsToCheck = []string{kubeletLogsPath, kubeAddonsLogsPath, kubeMasterAddonsLogsPath,
apiServerLogsPath, controllersLogsPath, schedulerLogsPath}
)
// TimestampedSize contains a size together with a time of measurement.
type TimestampedSize struct {
timestamp time.Time
size int
}
// LogSizeGatherer is a worker which grabs a WorkItem from the channel and does assigned work.
type LogSizeGatherer struct {
stopChannel chan bool
data *LogsSizeData
wg *sync.WaitGroup
workChannel chan WorkItem
}
// LogsSizeVerifier gathers data about log files sizes from master and node machines.
// It oversees a <workersNo> workers which do the gathering.
type LogsSizeVerifier struct {
client *client.Client
stopChannel chan bool
// data stores LogSizeData groupped per IP and log_path
data LogsSizeData
masterAddress string
nodeAddresses []string
wg sync.WaitGroup
workChannel chan WorkItem
workers []*LogSizeGatherer
}
type SingleLogSummary struct {
AverageGenerationRate int
NumberOfProbes int
}
type LogSizeDataTimeseries map[string]map[string][]TimestampedSize
// node -> file -> data
type LogsSizeDataSummary map[string]map[string]SingleLogSummary
// TODO: make sure that we don't need locking here
func (s *LogsSizeDataSummary) PrintHumanReadable() string {
buf := &bytes.Buffer{}
w := tabwriter.NewWriter(buf, 1, 0, 1, ' ', 0)
fmt.Fprintf(w, "host\tlog_file\taverage_rate (B/s)\tnumber_of_probes\n")
for k, v := range *s {
fmt.Fprintf(w, "%v\t\t\t\n", k)
for path, data := range v {
fmt.Fprintf(w, "\t%v\t%v\t%v\n", path, data.AverageGenerationRate, data.NumberOfProbes)
}
}
w.Flush()
return buf.String()
}
func (s *LogsSizeDataSummary) PrintJSON() string {
return prettyPrintJSON(*s)
}
type LogsSizeData struct {
data LogSizeDataTimeseries
lock sync.Mutex
}
// WorkItem is a command for a worker that contains an IP of machine from which we want to
// gather data and paths to all files we're interested in.
type WorkItem struct {
ip string
paths []string
backoffMultiplier int
}
func prepareData(masterAddress string, nodeAddresses []string) LogsSizeData {
data := make(LogSizeDataTimeseries)
ips := append(nodeAddresses, masterAddress)
for _, ip := range ips {
data[ip] = make(map[string][]TimestampedSize)
}
return LogsSizeData{
data: data,
lock: sync.Mutex{},
}
}
func (d *LogsSizeData) AddNewData(ip, path string, timestamp time.Time, size int) {
d.lock.Lock()
defer d.lock.Unlock()
d.data[ip][path] = append(
d.data[ip][path],
TimestampedSize{
timestamp: timestamp,
size: size,
},
)
}
// NewLogsVerifier creates a new LogsSizeVerifier which will stop when stopChannel is closed
func NewLogsVerifier(c *client.Client, stopChannel chan bool) *LogsSizeVerifier {
nodeAddresses, err := NodeSSHHosts(c)
expectNoError(err)
masterAddress := getMasterHost() + ":22"
workChannel := make(chan WorkItem, len(nodeAddresses)+1)
workers := make([]*LogSizeGatherer, workersNo)
verifier := &LogsSizeVerifier{
client: c,
stopChannel: stopChannel,
data: prepareData(masterAddress, nodeAddresses),
masterAddress: masterAddress,
nodeAddresses: nodeAddresses,
wg: sync.WaitGroup{},
workChannel: workChannel,
workers: workers,
}
verifier.wg.Add(workersNo)
for i := 0; i < workersNo; i++ {
workers[i] = &LogSizeGatherer{
stopChannel: stopChannel,
data: &verifier.data,
wg: &verifier.wg,
workChannel: workChannel,
}
}
return verifier
}
// GetSummary returns a summary (average generation rate and number of probes) of the data gathered by LogSizeVerifier
func (s *LogsSizeVerifier) GetSummary() *LogsSizeDataSummary {
result := make(LogsSizeDataSummary)
for k, v := range s.data.data {
result[k] = make(map[string]SingleLogSummary)
for path, data := range v {
if len(data) > 1 {
last := data[len(data)-1]
first := data[0]
rate := (last.size - first.size) / int(last.timestamp.Sub(first.timestamp)/time.Second)
result[k][path] = SingleLogSummary{
AverageGenerationRate: rate,
NumberOfProbes: len(data),
}
}
}
}
return &result
}
// Run starts log size gathering. It starts a gorouting for every worker and then blocks until stopChannel is closed
func (v *LogsSizeVerifier) Run() {
v.workChannel <- WorkItem{
ip: v.masterAddress,
paths: masterLogsToCheck,
backoffMultiplier: 1,
}
for _, node := range v.nodeAddresses {
v.workChannel <- WorkItem{
ip: node,
paths: nodeLogsToCheck,
backoffMultiplier: 1,
}
}
for _, worker := range v.workers {
go worker.Run()
}
<-v.stopChannel
v.wg.Wait()
}
func (g *LogSizeGatherer) Run() {
for g.Work() {
}
}
// Work does a single unit of work: tries to take out a WorkItem from the queue, ssh-es into a given machine,
// gathers data, writes it to the shared <data> map, and creates a gorouting which reinserts work item into
// the queue with a <pollingPeriod> delay. Returns false if worker should exit.
func (g *LogSizeGatherer) Work() bool {
var workItem WorkItem
select {
case <-g.stopChannel:
g.wg.Done()
return false
case workItem = <-g.workChannel:
}
sshResult, err := SSH(
fmt.Sprintf("ls -l %v | awk '{print $9, $5}' | tr '\n' ' '", strings.Join(workItem.paths, " ")),
workItem.ip,
testContext.Provider,
)
if err != nil {
Logf("Error while trying to SSH to %v, skipping probe. Error: %v", workItem.ip, err)
if workItem.backoffMultiplier < 128 {
workItem.backoffMultiplier *= 2
}
g.workChannel <- workItem
return true
}
workItem.backoffMultiplier = 1
results := strings.Split(sshResult.Stdout, " ")
now := time.Now()
for i := 0; i+1 < len(results); i = i + 2 {
path := results[i]
size, err := strconv.Atoi(results[i+1])
if err != nil {
Logf("Error during conversion to int: %v, skipping data. Error: %v", results[i+1], err)
continue
}
g.data.AddNewData(workItem.ip, path, now, size)
}
go func() {
select {
case <-time.After(time.Duration(workItem.backoffMultiplier) * pollingPeriod):
g.workChannel <- workItem
case <-g.stopChannel:
return
}
}()
return true
}