This repository has been archived by the owner on Jul 1, 2023. It is now read-only.
/
rc.go
106 lines (89 loc) · 2.56 KB
/
rc.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
// Copyright 2016 Gravitational Inc.
//
// 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 rigging
import (
"encoding/json"
"fmt"
"time"
log "github.com/sirupsen/logrus"
"github.com/gravitational/trace"
)
func GetRCPods(name string) (*PodList, error) {
cmd := KubeCommand("get", "pods", "-l", fmt.Sprintf("name=%s", name), "-o", "json")
out, err := cmd.Output()
if err != nil {
return nil, trace.Wrap(err)
}
var pods PodList
err = json.Unmarshal(out, &pods)
if err != nil {
return nil, trace.Wrap(err)
}
return &pods, nil
}
func ScaleReplicationController(name string, replicas int, tries int) error {
err := WaitForRCPods(name, 1, time.Second, tries)
if err != nil {
return trace.Wrap(err)
}
for i := 1; i < replicas; i++ {
cmd := KubeCommand("scale", fmt.Sprintf("--replicas=%d", i+1), fmt.Sprintf("rc/%s", name))
out, err := cmd.CombinedOutput()
log.Infof("cmd output: %s", string(out))
if err != nil {
return trace.Wrap(err)
}
err = WaitForRCPods(name, i+1, time.Second, tries)
if err != nil {
return trace.Wrap(err)
}
}
return nil
}
func GetReplicationController(name string) (*ReplicationController, error) {
cmd := KubeCommand("get", fmt.Sprintf("rc/%s", name), "-o", "json")
out, err := cmd.Output()
if err != nil {
return nil, trace.Wrap(err)
}
var rc ReplicationController
err = json.Unmarshal(out, &rc)
if err != nil {
return nil, trace.Wrap(err)
}
return &rc, nil
}
func WaitForRCPods(rcName string, desired int, delay time.Duration, tries int) error {
for i := 0; i < tries; i++ {
pods, err := GetRCPods(rcName)
if err != nil {
return trace.Wrap(err)
}
healthy := 0
for _, pod := range pods.Items {
for _, condition := range pod.Status.Conditions {
if condition.Type == "Ready" && condition.Status == "True" {
healthy++
break
}
}
}
log.Infof("looking for %d pods, have %d pods, %d healthy", desired, len(pods.Items), healthy)
if len(pods.Items) == desired && healthy == desired {
return nil
}
time.Sleep(delay)
}
return trace.Errorf("timed out waiting for pods")
}