/
component.go
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/
component.go
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// Copyright (c) 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 gardeneruser
import (
"bytes"
_ "embed"
"strings"
"text/template"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/operation/botanist/component/extensions/operatingsystemconfig/original/components"
"github.com/gardener/gardener/pkg/utils"
"github.com/Masterminds/sprig"
"k8s.io/utils/pointer"
)
var (
tplName = "reconcile"
//go:embed templates/scripts/reconcile.tpl.sh
tplContent string
tpl *template.Template
)
func init() {
var err error
tpl, err = template.
New(tplName).
Funcs(sprig.TxtFuncMap()).
Parse(tplContent)
if err != nil {
panic(err)
}
}
const (
pathScript = "/var/lib/gardener-user/run.sh"
// pathPublicSSHKey is the old file that contained just a single SSH public key.
// If this file is found on a node, it will be deleted.
pathPublicSSHKey = "/var/lib/gardener-user-ssh.key"
// pathAuthorizedSSHKeys is the new file that can contain multiple SSH public keys.
pathAuthorizedSSHKeys = "/var/lib/gardener-user-authorized-keys"
)
type component struct{}
// New returns a new Gardener user component.
func New() *component {
return &component{}
}
func (component) Name() string {
return "gardener-user"
}
func (component) Config(ctx components.Context) ([]extensionsv1alpha1.Unit, []extensionsv1alpha1.File, error) {
var script bytes.Buffer
if err := tpl.Execute(&script, map[string]interface{}{
"pathPublicSSHKey": pathPublicSSHKey,
"pathAuthorizedSSHKeys": pathAuthorizedSSHKeys,
}); err != nil {
return nil, nil, err
}
authorizedKeys := strings.Join(ctx.SSHPublicKeys, "\n")
return []extensionsv1alpha1.Unit{
{
Name: "gardener-user.service",
Enable: pointer.Bool(true),
Content: pointer.String(`[Unit]
Description=Configure gardener user
After=sshd.service
[Service]
Restart=on-failure
EnvironmentFile=/etc/environment
ExecStart=` + pathScript + `
`),
},
},
[]extensionsv1alpha1.File{
{
Path: pathAuthorizedSSHKeys,
Permissions: pointer.Int32(0644),
Content: extensionsv1alpha1.FileContent{
Inline: &extensionsv1alpha1.FileContentInline{
Encoding: "b64",
Data: utils.EncodeBase64([]byte(authorizedKeys)),
},
},
},
{
Path: pathScript,
Permissions: pointer.Int32(0755),
Content: extensionsv1alpha1.FileContent{
Inline: &extensionsv1alpha1.FileContentInline{
Encoding: "b64",
Data: utils.EncodeBase64(script.Bytes()),
},
},
},
},
nil
}