mirror of
https://github.com/kubesphere/kubekey.git
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77 lines
2.3 KiB
Go
77 lines
2.3 KiB
Go
/*
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Copyright 2022 The KubeSphere Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cloudinit
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import (
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"bytes"
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_ "embed"
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"text/template"
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"github.com/pkg/errors"
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bootstrapv1 "sigs.k8s.io/cluster-api/bootstrap/kubeadm/api/v1beta1"
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)
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const (
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// sentinelFileCommand writes a file to /run/cluster-api to signal successful Kubernetes bootstrapping in a way that
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// works both for Linux and Windows OS.
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sentinelFileCommand = "echo success > /run/cluster-api/bootstrap-success.complete"
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cloudConfigHeader = `## template: jinja
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#cloud-config
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`
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)
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// BaseUserData is shared across all the various types of files written to disk.
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type BaseUserData struct {
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Header string
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PreK3sCommands []string
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PostK3sCommands []string
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AdditionalFiles []bootstrapv1.File
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WriteFiles []bootstrapv1.File
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ConfigFile bootstrapv1.File
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SentinelFileCommand string
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}
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func (input *BaseUserData) prepare() {
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input.Header = cloudConfigHeader
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input.WriteFiles = append(input.WriteFiles, input.AdditionalFiles...)
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input.WriteFiles = append(input.WriteFiles, input.ConfigFile)
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input.SentinelFileCommand = sentinelFileCommand
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}
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func generate(kind string, tpl string, data interface{}) ([]byte, error) {
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tm := template.New(kind).Funcs(defaultTemplateFuncMap)
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if _, err := tm.Parse(filesTemplate); err != nil {
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return nil, errors.Wrap(err, "failed to parse files template")
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}
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if _, err := tm.Parse(commandsTemplate); err != nil {
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return nil, errors.Wrap(err, "failed to parse commands template")
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}
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t, err := tm.Parse(tpl)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to parse %s template", kind)
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}
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var out bytes.Buffer
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if err := t.Execute(&out, data); err != nil {
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return nil, errors.Wrapf(err, "failed to generate %s template", kind)
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}
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return out.Bytes(), nil
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}
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