Can you explain : "Labels are immutable as of API version apps/v1."

Vampouille

Hello,
I don't understand this sentence : "Labels are immutable as of API version apps/v1." For me "immutable" is something that you cannot change. But you can change labels of every objects.

So I try to modify labels of a deployment : it's allowed. Also modifications of Pod labels are allowed.

The only part that cannot be modified is maybe the spec.template.metadata.labels and spec.selector.matchLabels fields.

Best regards,
Julien

chrispokorni

Hi @Vampouille,

It is the label selector that is immutable, to prevent an accidental mass orphaning of all the pods managed by the operator.

Regards,
-Chris

Vampouille

@chrispokorni Thanks for the reply. What do you think about changing this sentence to : "Selector field is immutable in Deployment, DaemonSet and StatefulSet" ?

chrispokorni

Hi @Vampouille,

Sounds good.
What about the ReplicaSet, ReplicationController, or Job selectors?

Regards,
-Chris

Vampouille

Hello @chrispokorni,

From my point of view, things regarding ReplicationController can be removed. It's really historical now.