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@@ -108,3 +108,16 @@ INFO[0001] [certificates] Generating etcd-zzzzz certificate and key
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INFO[0001] Successfully Deployed state file at [./cluster.rkestate]
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INFO[0001] Rebuilding Kubernetes cluster with rotated certificates
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```
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### Optional settings
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Use [extra_args]({{<baseurl>}}rke/latest/en/config-options/services/services-extras/#extra-args) to enable optional settings of each [services]({{<baseurl>}}/rke/latest/en/config-options/services/) that needs certificates and keys.
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For example, to enable [Certificate Management](https://kubernetes.io/docs/tasks/tls/managing-tls-in-a-cluster/), add `cluster-signing-cert-file` & `cluster-signing-key-file` to kube-controller in `cluster.yml` file.
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```
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services:
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kube-controller:
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extra_args:
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cluster-signing-cert-file: "/etc/kubernetes/ssl/kube-ca.pem"
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cluster-signing-key-file: "/etc/kubernetes/ssl/kube-ca-key.pem"
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```
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