-
Notifications
You must be signed in to change notification settings - Fork 462
/
ensurer.go
144 lines (120 loc) · 4.43 KB
/
ensurer.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
// Copyright 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 controlplane
import (
"bytes"
"context"
_ "embed"
"text/template"
"github.com/Masterminds/semver"
"github.com/Masterminds/sprig"
"github.com/go-logr/logr"
kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1"
"k8s.io/utils/pointer"
extensionscontextwebhook "github.com/gardener/gardener/extensions/pkg/webhook/context"
"github.com/gardener/gardener/extensions/pkg/webhook/controlplane/genericmutator"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/utils"
)
const pathContainerdConfigScript = v1beta1constants.OperatingSystemConfigFilePathBinaries + "/init-containerd-with-registry-mirrors"
var (
tplNameInitializer = "init"
//go:embed templates/scripts/configure-containerd.tpl.sh
tplContentInitializer string
tplInitializer *template.Template
)
func init() {
var err error
tplInitializer, err = template.
New(tplNameInitializer).
Funcs(sprig.TxtFuncMap()).
Parse(tplContentInitializer)
if err != nil {
panic(err)
}
}
// NewEnsurer creates a new controlplane ensurer.
func NewEnsurer(logger logr.Logger) genericmutator.Ensurer {
return &ensurer{
logger: logger.WithName("local-controlplane-ensurer"),
}
}
type ensurer struct {
genericmutator.NoopEnsurer
logger logr.Logger
}
func (e *ensurer) EnsureKubeletConfiguration(_ context.Context, _ extensionscontextwebhook.GardenContext, _ *semver.Version, newObj, _ *kubeletconfigv1beta1.KubeletConfiguration) error {
newObj.FailSwapOn = pointer.Bool(false)
newObj.CgroupDriver = "systemd"
return nil
}
// EnsureAdditionalFiles ensures that additional required system files are added.
func (e *ensurer) EnsureAdditionalFiles(ctx context.Context, gc extensionscontextwebhook.GardenContext, new, _ *[]extensionsv1alpha1.File) error {
var script bytes.Buffer
if err := tplInitializer.Execute(&script, nil); err != nil {
return err
}
appendUniqueFile(new, extensionsv1alpha1.File{
Path: pathContainerdConfigScript,
Permissions: pointer.Int32(0744),
Content: extensionsv1alpha1.FileContent{
Inline: &extensionsv1alpha1.FileContentInline{
Encoding: "b64",
Data: utils.EncodeBase64(script.Bytes()),
},
},
})
return nil
}
func (e *ensurer) EnsureAdditionalUnits(_ context.Context, _ extensionscontextwebhook.GardenContext, new, _ *[]extensionsv1alpha1.Unit) error {
const unitNameInitializer = "containerd-configuration-local-setup.service"
unit := extensionsv1alpha1.Unit{
Name: unitNameInitializer,
Command: pointer.String("start"),
Enable: pointer.Bool(true),
Content: pointer.String(`[Unit]
Description=Containerd config configuration for local-setup
[Install]
WantedBy=multi-user.target
[Unit]
After=containerd-initializer.service
Requires=containerd-initializer.service
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=` + pathContainerdConfigScript)}
appendUniqueUnit(new, unit)
return nil
}
// appendUniqueFile appends a unit file only if it does not exist, otherwise overwrite content of previous files
func appendUniqueFile(files *[]extensionsv1alpha1.File, file extensionsv1alpha1.File) {
resFiles := make([]extensionsv1alpha1.File, 0, len(*files))
for _, f := range *files {
if f.Path != file.Path {
resFiles = append(resFiles, f)
}
}
*files = append(resFiles, file)
}
// appendUniqueUnit appends a unit only if it does not exist, otherwise overwrite content of previous unit
func appendUniqueUnit(units *[]extensionsv1alpha1.Unit, unit extensionsv1alpha1.Unit) {
resFiles := make([]extensionsv1alpha1.Unit, 0, len(*units))
for _, f := range *units {
if f.Name != unit.Name {
resFiles = append(resFiles, f)
}
}
*units = append(resFiles, unit)
}