This repository has been archived by the owner on Dec 11, 2021. It is now read-only.
forked from operator-framework/operator-sdk
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ready.go
58 lines (49 loc) · 1.69 KB
/
ready.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
// Copyright 2018 The Operator-SDK 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.
package ready
import (
"os"
)
const FileName = "/tmp/operator-sdk-ready"
// Ready holds state about whether the operator is ready and communicates that
// to a Kubernetes readiness probe.
type Ready interface {
// Set ensures that future readiness probes will indicate that the operator
// is ready.
Set() error
// Unset ensures that future readiness probes will indicate that the
// operator is not ready.
Unset() error
}
// NewFileReady returns a Ready that uses the presence of a file on disk to
// communicate whether the operator is ready. The operator's Pod definition
// should include a readinessProbe of "exec" type that calls
// "stat /tmp/operator-sdk-ready".
func NewFileReady() Ready {
return fileReady{}
}
type fileReady struct{}
// Set creates a file on disk whose presence can be used by a readiness probe
// to determine that the operator is ready.
func (r fileReady) Set() error {
f, err := os.Create(FileName)
if err != nil {
return err
}
return f.Close()
}
// Unset removes the file on disk that was created by Set().
func (r fileReady) Unset() error {
return os.Remove(FileName)
}