Hello, I’ve found something in the documentation which I’d like to understand.
As I understand it: if you change the the “replicas” value on a deployment it automatically creates new containers or drops old containers as required. There is an example of this at Run a Stateless Application Using a Deployment - Kubernetes where increasing the replica count creates new pods.
However at Deployments - Kubernetes it says:
Note: A Deployment’s rollout is triggered if and only if the Deployment’s Pod template (that is,
.spec.template) is changed, for example if the labels or container images of the template are updated. Other updates, such as scaling the Deployment, do not trigger a rollout.
This suggests the opposite.
Perhaps I don’t fully understand what’s meant by “trigger a rollout” in this context. Is a “rollout” only when all the old containers are replaced by fresh ones?