Kubernetes Deployment Rollback
Kubernetes Rollback
Rollback
If you’ve decided to undo the current rollout and rollback to the previous revision, you can do so.
pradeep@learnk8s$ kubectl rollout undo deployment/nginx-deployment
deployment.apps/nginx-deployment rolled back
pradeep@learnk8s$ kubectl rollout status deployment nginx-deployment
deployment "nginx-deployment" successfully rolled out
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment
deployment.apps/nginx-deployment
REVISION CHANGE-CAUSE
2 image updated to 1.21
3 <none>
pradeep@learnk8s$ kubectl describe deployments.apps nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Tue, 01 Mar 2022 06:05:50 +0530
Labels: app=nginx
Annotations: deployment.kubernetes.io/revision: 3
Selector: app=nginx
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.20
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-7b96fbf5d8 (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ReplicaSetCreateError 20m deployment-controller Failed to create new replica set "nginx-deployment-7b96fbf5d8": Unauthorized
Normal ScalingReplicaSet 13m deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 12m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 12m deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 12m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 12m deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 3
Normal ScalingReplicaSet 12m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 0
Normal ScalingReplicaSet 50s deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 48s deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 48s deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 46s deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 45s (x2 over 20m) deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 3
Normal ScalingReplicaSet 43s deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 0
Let us annotate revision 3.
pradeep@learnk8s$ kubectl annotate deployments.apps nginx-deployment kubernetes.io/change-cause="image rolledback to 1.20"
deployment.apps/nginx-deployment annotated
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment
deployment.apps/nginx-deployment
REVISION CHANGE-CAUSE
2 image updated to 1.21
3 image rolledback to 1.20
What happens if we rollback the deployment again?
pradeep@learnk8s$ kubectl rollout undo deployment/nginx-deployment
deployment.apps/nginx-deployment rolled back
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment
deployment.apps/nginx-deployment
REVISION CHANGE-CAUSE
3 image rolledback to 1.20
4 image updated to 1.21
pradeep@learnk8s$ kubectl rollout history deployment/nginx-deployment --revision=4
deployment.apps/nginx-deployment with revision #4
Pod Template:
Labels: app=nginx
pod-template-hash=5778cd94ff
Annotations: kubernetes.io/change-cause: image updated to 1.21
Containers:
nginx:
Image: nginx:1.21
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
pradeep@learnk8s$ kubectl describe deployments.apps nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Tue, 01 Mar 2022 06:05:50 +0530
Labels: app=nginx
Annotations: deployment.kubernetes.io/revision: 4
kubernetes.io/change-cause: image updated to 1.21
Selector: app=nginx
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.21
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-5778cd94ff (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ReplicaSetCreateError 31m deployment-controller Failed to create new replica set "nginx-deployment-7b96fbf5d8": Unauthorized
Normal ScalingReplicaSet 23m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 23m deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 3
Normal ScalingReplicaSet 23m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 0
Normal ScalingReplicaSet 11m deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 11m deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 11m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 11m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 11m (x2 over 31m) deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 3
Normal ScalingReplicaSet 11m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 0
Normal ScalingReplicaSet 2m27s (x2 over 24m) deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 2m25s (x2 over 23m) deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 2m25s (x2 over 23m) deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 2m20s (x3 over 2m23s) deployment-controller (combined from similar events): Scaled down replica set nginx-deployment-7b96fbf5d8 to 0
Let us update the deployment one more time, finally to the latest version.
pradeep@learnk8s$ kubectl set image deployment/nginx-deployment nginx=nginx:latest
deployment.apps/nginx-deployment image updated
Check the rollout history, and note that the existing annotation continued to the latest revision.
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment
deployment.apps/nginx-deployment
REVISION CHANGE-CAUSE
3 image rolledback to 1.20
4 image updated to 1.21
5 image updated to 1.21
Change the annotation
pradeep@learnk8s$ kubectl annotate deployments.apps nginx-deployment kubernetes.io/change-cause="image updated to the latest"
deployment.apps/nginx-deployment annotated
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment
deployment.apps/nginx-deployment
REVISION CHANGE-CAUSE
3 image rolledback to 1.20
4 image updated to 1.21
5 image updated to the latest
pradeep@learnk8s$ kubectl describe deployments.apps nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Tue, 01 Mar 2022 06:05:50 +0530
Labels: app=nginx
Annotations: deployment.kubernetes.io/revision: 5
kubernetes.io/change-cause: image updated to the latest
Selector: app=nginx
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:latest
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-67dffbbbb (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ReplicaSetCreateError 40m deployment-controller Failed to create new replica set "nginx-deployment-7b96fbf5d8": Unauthorized
Normal ScalingReplicaSet 32m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 32m deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 3
Normal ScalingReplicaSet 32m deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 0
Normal ScalingReplicaSet 20m deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 1
Normal ScalingReplicaSet 20m deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 20m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 20m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 20m (x2 over 40m) deployment-controller Scaled up replica set nginx-deployment-7b96fbf5d8 to 3
Normal ScalingReplicaSet 20m deployment-controller Scaled down replica set nginx-deployment-5778cd94ff to 0
Normal ScalingReplicaSet 11m (x2 over 33m) deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 1
Normal ScalingReplicaSet 11m (x2 over 33m) deployment-controller Scaled up replica set nginx-deployment-5778cd94ff to 2
Normal ScalingReplicaSet 11m (x2 over 33m) deployment-controller Scaled down replica set nginx-deployment-7b96fbf5d8 to 2
Normal ScalingReplicaSet 2m52s (x9 over 11m) deployment-controller (combined from similar events): Scaled down replica set nginx-deployment-5778cd94ff to 0
pradeep@learnk8s$ kubectl get pods
NAME READY STATUS RESTARTS AGE
kodekloud-8477b7849-blzrs 1/1 Running 1 13d
kodekloud-8477b7849-m65m8 1/1 Running 1 13d
kodekloud-8477b7849-p7psw 1/1 Running 0 32h
kodekloud-8477b7849-vf9zs 1/1 Running 0 32h
kodekloud-cm 0/1 ContainerStatusUnknown 1 13d
nginx-deployment-67dffbbbb-7ttxq 1/1 Running 0 3m35s
nginx-deployment-67dffbbbb-8dtsf 1/1 Running 0 3m38s
nginx-deployment-67dffbbbb-sz5bb 1/1 Running 0 3m40s
pod-with-hostpath-volume 0/1 ContainerCreating 1 8d
pod-with-init-container 1/1 Running 45 (4m46s ago) 12d
security-context-demo-cap 1/1 Running 15 (5m16s ago) 9d
pradeep@learnk8s$ kubectl get rs
NAME DESIRED CURRENT READY AGE
kodekloud-589c9f4b47 0 0 0 13d
kodekloud-676c6b9fcd 0 0 0 13d
kodekloud-8477b7849 4 4 4 13d
nginx-deployment-5778cd94ff 0 0 0 34m
nginx-deployment-67dffbbbb 3 3 3 3m52s
nginx-deployment-7b96fbf5d8 0 0 0 41m
pradeep@learnk8s$ kubectl rollout history deployment nginx-deployment --revision=5
deployment.apps/nginx-deployment with revision #5
Pod Template:
Labels: app=nginx
pod-template-hash=67dffbbbb
Annotations: kubernetes.io/change-cause: image updated to the latest
Containers:
nginx:
Image: nginx:latest
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
