we have kubernetes deployment controller build using kubebuilder. in controller we are updating ConfigMap in controller and then want all pods backed by deployment to restart so latest ConfigMap will be reloaded.
How can I trigger this deployment/pods restart from controller.
Note: the deployment/pod I want to restart is different form the one for which controller would have received event.
we are exploring the ways to do this
You can't "restart" a Pod, but if the Pod is managed by a Deployment you can remove the Pod and the Deployment will spawn a new one. If you update the Deployment (e.g., by changing the name of a ConfigMap referenced in the manifest), the Deployment will automatically respawn all associated pods.
Your controller just needs to make the same API call you would normally use to delete a Pod or update a Deployment. This may require some RBAC configuration so that the ServiceAccount under which your controller is running has the necessary permissions.