I’m trying to understand the API equivalent of the kubectl rolling-update command for replication controllers. Can someone explain which API interface handles this operation? I’d really appreciate an example of how to update a container image using this API. I’ve been playing around with kubectl, but I want to automate this process in my own scripts. Any help or pointers would be great!
Here’s a simple example of what I’m doing with kubectl:
kubectl rolling-update myapp --image=newimage:v2
But how would I do this programmatically? Thanks in advance for any insights!
As someone who’s been working with Kubernetes for a while now, I can tell you that the rolling-update command for replication controllers is indeed outdated. These days, we use the Deployments API for this kind of thing. It’s much more versatile and reliable.
In my projects, I’ve found that using the PATCH method on the Deployments API is the way to go. The endpoint you’ll want to hit is /apis/apps/v1/namespaces/{namespace}/deployments/{name}. You’ll need to include the new image details in your request body.
One thing to keep in mind - make sure you’re using the right authentication and headers when making these API calls. I’ve tripped up on that before and it can be a real headache to debug.
If you’re writing scripts to automate this, consider using a Kubernetes client library for your preferred programming language. It can save you a lot of time and hassle in the long run.
Using the kubectl rolling-update command for replication controllers is no longer recommended, as the method has been deprecated in favor of the Deployments API. From my experience, the Deployments API provides enhanced flexibility and facilitates automation more efficiently. For instance, when updating a container image, you would send a PATCH request to the endpoint /apis/apps/v1/namespaces/{namespace}/deployments/{name} along with a payload that specifies the new image. This approach is not only more robust but also simplifies integration with CI/CD pipelines while ensuring a more reliable rollout process.
hey there! the kubectl rolling-update command is actually deprecated now. for programmatic updates, you should use the deployments api instead. it’s way more flexible and powerful.
you can use the patch endpoint to update the container image. something like:
PATCH /apis/apps/v1/namespaces/{namespace}/deployments/{name}
with the new image in the request body. hope that helps!