Understanding Kubernetes Reconciliation: Resolving Conflicts in the Cluster

Reconciler is a component in Kubernetes that is responsible for resolving conflicts between different objects in the cluster. When multiple objects, such as pods or deployments, are created with the same name or label, the reconciler is used to determine which object should be given priority and which should be terminated or rolled back.

The reconciler is typically implemented as a separate component within the Kubernetes control plane, and it uses a set of rules and heuristics to make decisions about how to resolve conflicts. These rules and heuristics are defined by the Kubernetes community and are typically based on the specific use case or application that the cluster is being used for.

Some examples of conflicts that the reconciler might be used to resolve include:

* Two pods with the same name are created at the same time.
* A deployment is rolled back, but some of the replicas are still running.
* A service is updated to have a different label, but there are already pods running with the old label.

In each of these cases, the reconciler would be responsible for determining which object should be given priority and how to resolve the conflict. This might involve terminating one or more objects, rolling back changes, or updating the configuration of one or more objects.