kubebuilder:printcolumn - Adding back the AGE column

Operator-SDK kubebuilder printcolumn age

1 min read | by Jordi Prats

If we use //+kubebuilder:printcolumn to add fields to print with kubectl get we'll notice that the AGE colum goes away with it. We can use an additional //+kubebuilder:printcolumn to add the AGE column back.

$ kubectl get example
NAME   ID
demo   1234

To do so we just need to find the field in the object that contains it's age. That is: .metadata.creationTimestamp:

//+kubebuilder:object:root=true
//+kubebuilder:subresource:status
//+kubebuilder:printcolumn:name="ID",type="integer",JSONPath=".spec.exampleID",description="example ID"
//+kubebuilder:printcolumn:name="Age",type="date",JSONPath=".metadata.creationTimestamp"

Once installed we'll get the AGE column back:

$ kubectl get example
NAME   ID    AGE
demo   1234  32s

Posted on 29/08/2023

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