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kubeadm: backup the kubelet config file before writting the new one

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This addresses the TODO item so that the old kubelet config file could
be recovered if something goes wrong.

Signed-off-by: Dave Chen <dave.chen@arm.com>
This commit is contained in:
Dave Chen 2022-12-07 17:20:18 +08:00
parent 57eb5d631c
commit cd1f082179
1 changed files with 11 additions and 2 deletions
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13
cmd/kubeadm/app/cmd/phases/upgrade/node/kubeletconfig.go
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@ -71,8 +71,17 @@ func runKubeletConfigPhase() func(c workflow.RunData) error {
return err
}
// TODO: Checkpoint the current configuration first so that if something goes wrong it can be recovered
// Create a copy of the kubelet config file in the /etc/kubernetes/tmp/ folder.
backupDir, err := constants.CreateTempDirForKubeadm(constants.KubernetesDir, "kubeadm-kubelet-config")
if err != nil {
return err
}
src := filepath.Join(kubeletDir, constants.KubeletConfigurationFileName)
dest := filepath.Join(backupDir, constants.KubeletConfigurationFileName)
fmt.Printf("[upgrade] backing up kubelet config file to %s\n", dest)
if err := os.Rename(src, dest); err != nil {
return errors.Wrap(err, "error backing up the kubelet config file")
}
// Store the kubelet component configuration.
if err = kubeletphase.WriteConfigToDisk(&cfg.ClusterConfiguration, kubeletDir, data.PatchesDir(), data.OutputWriter()); err != nil {
return err