Set Image Record For Free

In the following interactive tutorial, we'll update our application to a new version, and also perform a rollback. Update the version of the app. To list your Deployments, run the get deployments subcommand: kubectl get deployments. ... Step 2: Verify an update. First, check that the app is running. ... Roll back an update.

These are the steps that you'll need to do, if you want to manually update an app in Kubernetes: Unit test code in a CI system. Build an updated Docker image (with a new tag). Upload the image to a repository. Update your deployment definition YAMLs for your app: deployment, service and Kubernetes secret and ingress.

Run kubectl get deployments to check if the Deployment was created. When you inspect the Deployments in your cluster, the following fields are displayed: NAME lists the names of the Deployments in the namespace. READY displays how many replicas of the application are available to your users.

Updating an application You can use kubectl set to make changes to an object's image , resources (compute resource such as CPU and memory), or selector fields. The kubectl set image command updates the nginx image of the Deployment's Pods one at a time.

Use the kubectl set command allows us to overwrite the spec.

Setting the kubectl flag --record to true allows you to record current command in the annotations of the resources being created or updated. It will be useful for future introspection; for example, to see the commands executed in each Deployment revision.

Procedure Create a pod. kubectl create -f nginx.yaml. ... Query the information of the pod. Query the IP address of the pod. ... Use the following methods to change the container image: kubectl patch. ... View the information of the pod after you change the image. Query the IP address of the pod.