-
Notifications
You must be signed in to change notification settings - Fork 39.2k
/
deployment.go
147 lines (131 loc) · 4.32 KB
/
deployment.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
/*
Copyright 2016 The Kubernetes 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 kubectl
import (
"fmt"
"strings"
appsv1beta1 "k8s.io/api/apps/v1beta1"
"k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
)
// BaseDeploymentGenerator: implement the common functionality of
// DeploymentBasicGeneratorV1 and DeploymentBasicAppsGeneratorV1. To reduce
// confusion, it's best to keep this struct in the same file as those
// generators.
type BaseDeploymentGenerator struct {
Name string
Images []string
}
// validate: check if the caller has forgotten to set one of our fields.
func (b BaseDeploymentGenerator) validate() error {
if len(b.Name) == 0 {
return fmt.Errorf("name must be specified")
}
if len(b.Images) == 0 {
return fmt.Errorf("at least one image must be specified")
}
return nil
}
// structuredGenerate: determine the fields of a deployment. The struct that
// embeds BaseDeploymentGenerator should assemble these pieces into a
// runtime.Object.
func (b BaseDeploymentGenerator) structuredGenerate() (
podSpec v1.PodSpec,
labels map[string]string,
selector metav1.LabelSelector,
err error,
) {
err = b.validate()
if err != nil {
return
}
podSpec = buildPodSpec(b.Images)
labels = map[string]string{}
labels["app"] = b.Name
selector = metav1.LabelSelector{MatchLabels: labels}
return
}
// buildPodSpec: parse the image strings and assemble them into the Containers
// of a PodSpec. This is all you need to create the PodSpec for a deployment.
func buildPodSpec(images []string) v1.PodSpec {
podSpec := v1.PodSpec{Containers: []v1.Container{}}
for _, imageString := range images {
// Retain just the image name
imageSplit := strings.Split(imageString, "/")
name := imageSplit[len(imageSplit)-1]
// Remove any tag or hash
if strings.Contains(name, ":") {
name = strings.Split(name, ":")[0]
} else if strings.Contains(name, "@") {
name = strings.Split(name, "@")[0]
}
podSpec.Containers = append(podSpec.Containers, v1.Container{Name: name, Image: imageString})
}
return podSpec
}
// DeploymentBasicGeneratorV1 supports stable generation of a deployment
type DeploymentBasicGeneratorV1 struct {
BaseDeploymentGenerator
}
// Ensure it supports the generator pattern that uses parameters specified during construction
var _ StructuredGenerator = &DeploymentBasicGeneratorV1{}
// StructuredGenerate outputs a deployment object using the configured fields
func (s *DeploymentBasicGeneratorV1) StructuredGenerate() (runtime.Object, error) {
podSpec, labels, selector, err := s.structuredGenerate()
one := int32(1)
return &extensionsv1beta1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: s.Name,
Labels: labels,
},
Spec: extensionsv1beta1.DeploymentSpec{
Replicas: &one,
Selector: &selector,
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: labels,
},
Spec: podSpec,
},
},
}, err
}
// DeploymentBasicAppsGeneratorV1 supports stable generation of a deployment under apps/v1beta1 endpoint
type DeploymentBasicAppsGeneratorV1 struct {
BaseDeploymentGenerator
}
// Ensure it supports the generator pattern that uses parameters specified during construction
var _ StructuredGenerator = &DeploymentBasicAppsGeneratorV1{}
// StructuredGenerate outputs a deployment object using the configured fields
func (s *DeploymentBasicAppsGeneratorV1) StructuredGenerate() (runtime.Object, error) {
podSpec, labels, selector, err := s.structuredGenerate()
one := int32(1)
return &appsv1beta1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: s.Name,
Labels: labels,
},
Spec: appsv1beta1.DeploymentSpec{
Replicas: &one,
Selector: &selector,
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: labels,
},
Spec: podSpec,
},
},
}, err
}