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CCM/CSI migration support for clusters with static worker nodes (#1544)
* CCM/CSI migration support for clusters with static worker nodes Signed-off-by: Marko Mudrinić <[email protected]> * Address review comments Signed-off-by: Marko Mudrinić <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| Copyright 2021 The KubeOne 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. | ||
| */ | ||
|
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| package tasks | ||
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| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "io" | ||
| "sort" | ||
| "strings" | ||
|
|
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| "github.com/pkg/errors" | ||
|
|
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| "k8c.io/kubeone/pkg/ssh/sshiofs" | ||
| "k8c.io/kubeone/pkg/state" | ||
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| kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1" | ||
| "sigs.k8s.io/yaml" | ||
| ) | ||
|
|
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| const ( | ||
| kubeadmEnvFlagsFile = "/var/lib/kubelet/kubeadm-flags.env" | ||
| kubeletKubeadmArgsEnv = "KUBELET_KUBEADM_ARGS" | ||
| kubeletConfigFile = "/var/lib/kubelet/config.yaml" | ||
| ) | ||
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| func updateRemoteFile(s *state.State, filePath string, modifier func(content []byte) ([]byte, error)) error { | ||
| sshfs := s.Runner.NewFS() | ||
| f, err := sshfs.Open(filePath) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer f.Close() | ||
|
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| buf, err := io.ReadAll(f) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| buf, err = modifier(buf) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| fw, ok := f.(sshiofs.ExtendedFile) | ||
| if !ok { | ||
| return errors.New("file is not writable") | ||
| } | ||
|
|
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| if err = fw.Truncate(0); err != nil { | ||
| return err | ||
| } | ||
|
|
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| if _, err = fw.Seek(0, io.SeekStart); err != nil { | ||
| return err | ||
| } | ||
|
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| if _, err = io.Copy(fw, bytes.NewBuffer(buf)); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func unmarshalKubeletFlags(buf []byte) (map[string]string, error) { | ||
| // throw away KUBELET_KUBEADM_ARGS= | ||
| s1 := strings.SplitN(string(buf), "=", 2) | ||
| if len(s1) != 2 { | ||
| return nil, errors.New("can't parse: wrong split length") | ||
| } | ||
|
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| envValue := strings.Trim(s1[1], `"`) | ||
| flagsvalues := strings.Split(envValue, " ") | ||
| kubeletflagsMap := map[string]string{} | ||
|
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| for _, flg := range flagsvalues { | ||
| fl := strings.SplitN(flg, "=", 2) | ||
| if len(fl) != 2 { | ||
| return nil, errors.New("wrong split length") | ||
| } | ||
| kubeletflagsMap[fl[0]] = fl[1] | ||
| } | ||
|
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| return kubeletflagsMap, nil | ||
| } | ||
|
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| func marshalKubeletFlags(kubeletflags map[string]string) []byte { | ||
| kvpairs := []string{} | ||
| for k, v := range kubeletflags { | ||
| kvpairs = append(kvpairs, fmt.Sprintf("%s=%s", k, v)) | ||
| } | ||
|
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| sort.Strings(kvpairs) | ||
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| return []byte(fmt.Sprintf(`%s="%s"`, kubeletKubeadmArgsEnv, strings.Join(kvpairs, " "))) | ||
| } | ||
|
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| func unmarshalKubeletConfig(configBytes []byte) (*kubeletconfigv1beta1.KubeletConfiguration, error) { | ||
| var config kubeletconfigv1beta1.KubeletConfiguration | ||
| err := yaml.Unmarshal(configBytes, &config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return &config, nil | ||
| } | ||
|
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| func marshalKubeletConfig(config *kubeletconfigv1beta1.KubeletConfiguration) ([]byte, error) { | ||
| encodedCfg, err := yaml.Marshal(config) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "failed to marshal kubelet config") | ||
| } | ||
|
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| return encodedCfg, nil | ||
| } |
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