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kubeadm: apply patches to the kubelet config before writing it to disk

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In phases/kubelet/WriteConfigToDisk() create a patch
manager for the root patches directory and apply
the user patches with a target "kubeletconfiguration".
This commit is contained in:
Lubomir I. Ivanov 2022-06-06 17:57:39 +03:00
parent 665f66d2bc
commit 85fb6b01f8
1 changed files with 21 additions and 0 deletions
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21
cmd/kubeadm/app/phases/kubelet/config.go
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@ -29,12 +29,14 @@ import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/version"
clientset "k8s.io/client-go/kubernetes"
kubeletconfig "k8s.io/kubelet/config/v1beta1"
kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
"k8s.io/kubernetes/cmd/kubeadm/app/componentconfigs"
kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
"k8s.io/kubernetes/cmd/kubeadm/app/features"
"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
"k8s.io/kubernetes/cmd/kubeadm/app/util/patches"
)
// WriteConfigToDisk writes the kubelet config object down to a file
@ -54,6 +56,25 @@ func WriteConfigToDisk(cfg *kubeadmapi.ClusterConfiguration, kubeletDir, patches
return err
}
// Apply patches to the KubeletConfiguration
if len(patchesDir) != 0 {
target := "kubeletconfiguration"
knownTargets := []string{target}
patchManager, err := patches.GetPatchManagerForPath(patchesDir, knownTargets, output)
if err != nil {
return err
}
patchTarget := &patches.PatchTarget{
Name: target,
StrategicMergePatchObject: kubeletconfig.KubeletConfiguration{},
Data: kubeletBytes,
}
if err := patchManager.ApplyPatchesToTarget(patchTarget); err != nil {
return err
}
kubeletBytes = patchTarget.Data
}
return writeConfigBytesToDisk(kubeletBytes, kubeletDir)
}