1

How do you change the name of a user in a kube config file with kubectl (no text editor)?

Example kube config file stage_config.yaml:

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: REDACTED
    server: https://127.0.0.1:6443
  name: cluster.local
contexts:
- context:
    cluster: cluster.local
    user: kubernetes-admin
  name: kubernetes-admin@cluster.local
current-context: kubernetes-admin@cluster.local
kind: Config
preferences: {}
users:
- name: kubernetes-admin
  user:
    client-certificate-data: REDACTED
    client-key-data: REDACTED

I want to do something like kubectl config rename-user --kubeconfig ~/.kube/stage_config.yaml kubernetes-admin kubernetes-admin-1

With the output like:

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: REDACTED
    server: https://127.0.0.1:6443
  name: cluster.local
contexts:
- context:
    cluster: cluster.local
    user: kubernetes-admin
  name: kubernetes-admin@cluster.local
current-context: kubernetes-admin@cluster.local
kind: Config
preferences: {}
users:
- name: kubernetes-admin-1
  user:
    client-certificate-data: REDACTED
    client-key-data: REDACTED

I've tried kubectl config set but receive the following error:

kubectl config set --kubeconfig ~/.kube/stage_config.yaml users.name.kubernetes-admin kubernetes-admin-1
error: can't set a map to a value: map[kubernetes-admin:0xc000c53100]

kubectl config --help shows that the rename-context command exists, but nothing like rename-user nor rename-cluster exists.

SlyGuy
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1 Answers1

1

Use JQ to do the magic (just make sure your KubeConfig is in JSON). I'm sure is possible to do it with YQ for YAML but I let someone else fill that one in. Set CLUSTER_NAME to your desired value.

jq '.clusters[0].name="'$CLUSTER_NAME'" | .contexts[0].context.cluster="'$CLUSTER_NAME'"' source/kubeconfig > target/kubeconfig
anon_coward
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