What is the method for updating pods in k8s?

There are several ways to update a running pod:

1. Update using the kubectl command line tool: Use the “kubectl edit pod ” command to open the configuration file of the pod for editing. You can modify configurations such as the pod’s image and environment variables, and the updates will be automatically applied after saving.
2. Replace the currently running pod with a new one by using the kubectl command line tool with kubectl replace -f . The new pod configuration file can include changes to the image, environment variables, and other configurations.
3. To scale up using the kubectl command line tool, use the command “kubectl scale –replicas= ” to increase or decrease the number of pod replicas.
4. Utilize the `kubectl` command-line tool for rolling updates: The `kubectl set image deployment/ =` command can be used for rolling updates, replacing pods one by one with the new image.
5. Perform rolling updates with Deployment objects: By modifying the spec.template.spec.containers[].image field of a Deployment object, you can update the image of all pods managed by the Deployment. Then, apply the update using the kubectl apply -f command.

In conclusion, you can update a pod by directly modifying its configuration file, replacing the pod, scaling the pod up or down, performing a rolling update on the pod, or updating the Deployment object. The specific method to use depends on the actual requirements and environment.