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

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Vampouille
Vampouille Posts: 19
in LFS258 Class Forum

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

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  • chrispokorni
    chrispokorni Posts: 2,165
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    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
    Vampouille Posts: 19
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    @chrispokorni Thanks for the reply. What do you think about changing this sentence to : "Selector field is immutable in Deployment, DaemonSet and StatefulSet" ?

  • chrispokorni
    chrispokorni Posts: 2,165
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    Hi @Vampouille,

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

    Regards,
    -Chris

  • Vampouille
    Vampouille Posts: 19
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    Hello @chrispokorni,

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

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