Deployment

Deployment enables declarative updates for Pods and ReplicaSets.

Concept documentation for Deployment

Deployments

A Deployment manages a set of Pods to run an application workload, usually one that doesn't maintain state.

apiVersion: apps/v1

import "k8s.io/api/apps/v1"

Deployment

Deployment enables declarative updates for Pods and ReplicaSets.

Field	Description
`apiVersion` string	APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
`kind` string	Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
`metadata` ObjectMeta	Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
`spec` DeploymentSpec	Specification of the desired behavior of the Deployment.
`status` DeploymentStatus	Most recently observed status of the Deployment.

DeploymentSpec

DeploymentSpec is the specification of the desired behavior of the Deployment.

Field	Description
`minReadySeconds` integer	Minimum number of seconds for which a newly created pod should be ready without any of its container crashing, for it to be considered available. Defaults to 0 (pod will be considered available as soon as it is ready)
`paused` boolean	Indicates that the deployment is paused.
`progressDeadlineSeconds` integer	The maximum time in seconds for a deployment to make progress before it is considered to be failed. The deployment controller will continue to process failed deployments and a condition with a ProgressDeadlineExceeded reason will be surfaced in the deployment status. Note that progress will not be estimated during the time a deployment is paused. Defaults to 600s.
`replicas` integer	Number of desired pods. This is a pointer to distinguish between explicit zero and not specified. Defaults to 1.
`revisionHistoryLimit` integer	The number of old ReplicaSets to retain to allow rollback. This is a pointer to distinguish between explicit zero and not specified. Defaults to 10.
`selector` * LabelSelector	Label selector for pods. Existing ReplicaSets whose pods are selected by this will be the ones affected by this deployment. It must match the pod template's labels.
`strategy` DeploymentStrategy patch strategy: retainKeys	The deployment strategy to use to replace existing pods with new ones.
`strategy.rollingUpdate` RollingUpdateDeployment	Rolling update config params. Present only if DeploymentStrategyType = RollingUpdate.
`strategy.rollingUpdate.maxSurge`	The maximum number of pods that can be scheduled above the desired number of pods. Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%). This can not be 0 if MaxUnavailable is 0. Absolute number is calculated from percentage by rounding up. Defaults to 25%. Example: when this is set to 30%, the new ReplicaSet can be scaled up immediately when the rolling update starts, such that the total number of old and new pods do not exceed 130% of desired pods. Once old pods have been killed, new ReplicaSet can be scaled up further, ensuring that total number of pods running at any time during the update is at most 130% of desired pods.
`strategy.rollingUpdate.maxUnavailable`	The maximum number of pods that can be unavailable during the update. Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%). Absolute number is calculated from percentage by rounding down. This can not be 0 if MaxSurge is 0. Defaults to 25%. Example: when this is set to 30%, the old ReplicaSet can be scaled down to 70% of desired pods immediately when the rolling update starts. Once new pods are ready, old ReplicaSet can be scaled down further, followed by scaling up the new ReplicaSet, ensuring that the total number of pods available at all times during the update is at least 70% of desired pods.
`strategy.type` string	Type of deployment. Can be "Recreate" or "RollingUpdate". Default is RollingUpdate. Possible enum values: - `"Recreate"` Kill all existing pods before creating new ones. - `"RollingUpdate"` Replace the old ReplicaSets by new one using rolling update i.e gradually scale down the old ReplicaSets and scale up the new one.
`template` * PodTemplateSpec	Template describes the pods that will be created. The only allowed template.spec.restartPolicy value is "Always".

DeploymentStatus

DeploymentStatus is the most recently observed status of the Deployment.

Field	Description
`availableReplicas` integer	Total number of available non-terminating pods (ready for at least minReadySeconds) targeted by this deployment.
`collisionCount` integer	Count of hash collisions for the Deployment. The Deployment controller uses this field as a collision avoidance mechanism when it needs to create the name for the newest ReplicaSet.
`conditions` DeploymentCondition array patch strategy: merge on key `type`	Represents the latest available observations of a deployment's current state.
`observedGeneration` integer	The generation observed by the deployment controller.
`readyReplicas` integer	Total number of non-terminating pods targeted by this Deployment with a Ready Condition.
`replicas` integer	Total number of non-terminating pods targeted by this deployment (their labels match the selector).
`terminatingReplicas` integer	Total number of terminating pods targeted by this deployment. Terminating pods have a non-null .metadata.deletionTimestamp and have not yet reached the Failed or Succeeded .status.phase. This is a beta field and requires enabling DeploymentReplicaSetTerminatingReplicas feature (enabled by default).
`unavailableReplicas` integer	Total number of unavailable pods targeted by this deployment. This is the total number of pods that are still required for the deployment to have 100% available capacity. They may either be pods that are running but not yet available or pods that still have not been created.
`updatedReplicas` integer	Total number of non-terminating pods targeted by this deployment that have the desired template spec.

DeploymentList

DeploymentList is a list of Deployments.

Field	Description
`apiVersion` string	APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
`items` * Deployment array	Items is the list of Deployments.
`kind` string	Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
`metadata` ListMeta	Standard list metadata.

DeploymentCondition

DeploymentCondition describes the state of a deployment at a certain point.

Field	Description
`lastTransitionTime` Time	Last time the condition transitioned from one status to another.
`lastUpdateTime` Time	The last time this condition was updated.
`message` string	A human readable message indicating details about the transition.
`reason` string	The reason for the condition's last transition.
`status` * string	Status of the condition, one of True, False, Unknown.
`type` * string	Type of deployment condition.

© 2026 The Kubernetes Authors | Documentation Distributed under CC BY 4.0
Copyright © 2026 The Linux Foundation ®. All rights reserved.
https://kubernetes.io/docs/reference/kubernetes-api/apps/deployment-v1/