:_mod-docs-content-type: REFERENCE

// Module included in the following assemblies:
//
// assembly-config.adoc

[id='ref-kubernetes-labels-{context}']
= Restrictions on Kubernetes labels

[role="_abstract"]
https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/[Kubernetes labels] make it easier to organize, manage, and discover Kubernetes resources within your applications.
The Cluster Operator is responsible for applying the following Kubernetes labels to the operands it deploys.
These labels cannot be overridden through `template` configuration of Strimzi resources:

* `app.kubernetes.io/name`: Identifies the component type within Strimzi, such as `kafka` or `cruise-control`.
* `app.kubernetes.io/instance`: Represents the name of the custom resource to which the operand belongs to. For instance, if a Kafka custom resource is named `my-cluster`, this label will bear that name on the associated pods.
* `app.kubernetes.io/part-of`: Similar to `app.kubernetes.io/instance`, but prefixed with `strimzi-`.
* `app.kubernetes.io/managed-by`: Defines the application responsible for managing the operand, such as `strimzi-cluster-operator` or `strimzi-user-operator`.

.Example Kubernetes labels on a Kafka pod when deploying a `Kafka` custom resource named `my-cluster`
[source,yaml,subs=attributes+]
----
apiVersion: {KafkaApiVersion}
kind: Pod
metadata:
  name: my-cluster-kafka-0
  labels:
    app.kubernetes.io/instance: my-cluster
    app.kubernetes.io/managed-by: strimzi-cluster-operator
    app.kubernetes.io/name: kafka
    app.kubernetes.io/part-of: strimzi-my-cluster
spec:
  # ...
----
