Well-Known Labels, Annotations and Taints [page]deterministic

Kubernetes reserves all labels, annotations and taints in the `kubernetes.io` and `k8s.io` namespaces.

This document serves both as a reference to the values and as a coordination point for assigning values.

## Labels, annotations and taints used on API objects

### apf.kubernetes.io/autoupdate-spec

Type: Annotation

Example: `apf.kubernetes.io/autoupdate-spec: "true"`

Used on: [`FlowSchema` and `PriorityLevelConfiguration` Objects](/docs/concepts/cluster-administration/flow-control/#defaults)

If this annotation is set to true on a FlowSchema or PriorityLevelConfiguration, the `spec` for that object is managed by the kube-apiserver. If the API server does not recognize an APF object, and you annotate it for automatic update, the API server deletes the entire object. Otherwise, the API server does not manage the object spec. For more details, read [Maintenance of the Mandatory and Suggested Configuration Objects](/docs/concepts/cluster-administration/flow-control/#maintenance-of-the-mandatory-and-suggested-configuration-objects).

### app.kubernetes.io/component

Type: Label

Example: `app.kubernetes.io/component: "database"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The component within the application architecture.

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### app.kubernetes.io/created-by (deprecated)

Type: Label

Example: `app.kubernetes.io/created-by: "controller-manager"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The controller/user who created this resource.

> Note: Starting from v1.9, this label is deprecated.

### app.kubernetes.io/instance

Type: Label

Example: `app.kubernetes.io/instance: "mysql-abcxyz"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

A unique name identifying the instance of an application. To assign a non-unique name, use [app.kubernetes.io/name](#app-kubernetes-io-name).

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### app.kubernetes.io/managed-by

Type: Label

Example: `app.kubernetes.io/managed-by: "helm"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The tool being used to manage the operation of an application.

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### app.kubernetes.io/name

Type: Label

Example: `app.kubernetes.io/name: "mysql"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The name of the application.

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### app.kubernetes.io/part-of

Type: Label

Example: `app.kubernetes.io/part-of: "wordpress"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The name of a higher-level application this object is part of.

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### app.kubernetes.io/version

Type: Label

Example: `app.kubernetes.io/version: "5.7.21"`

Used on: All Objects (typically used on [workload resources](/docs/reference/kubernetes-api/workload-resources/)).

The current version of the application.

Common forms of values include:

• [semantic version](https://semver.org/spec/v1.0.0.html)
• the Git [revision hash](https://git-scm.com/book/en/v2/Git-Tools-Revision-Selection#_single_revisions) for the source code.

One of the [recommended labels](/docs/concepts/overview/working-with-objects/common-labels/#labels).

### applyset.kubernetes.io/additional-namespaces (alpha) {#applyset-kubernetes-io-additional-namespaces}

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