02.08.2020

rook ceph cleanup

However, keep in mind that this can reduce the visibility of failures from Kubernetes Pod and Pod Controller views. kubectl -n rook-ceph patch crd cephclusters.ceph.rook.io --type merge -p '{"metadata":{"finalizers": [null]}}' # Zap the disk to a fresh, usable state (zap-all is important, b/c MBR has to be clean)# These steps only have to be run once on each node# If rook sets up osds using ceph-volume, teardown leaves some devices mapped that lock the disks.# ceph-volume setup can leave ceph- directories in /dev (unnecessary clutter) kubectl -n rook-ceph patch crd cephclusters.ceph.rook.io --type merge -p '{"metadata":{"finalizers": [null]}}' Within a few seconds you should see that the cluster CRD has been deleted and will no longer block other cleanup such as deleting the rook-ceph namespace. Ceph-CSI v2.0. kubectl delete storageclass csi-cephfs Simplify cleaning up a failed OSD with a job that can be launched by the admin But I think it makes sense to proceed with this general design for now, and if there are things we miss, we will eventually find them.Something I wonder about is actual failed devices. kubectl delete -f ../mysql.yaml ceph.rook… If you want to tear down the cluster and bring up a new one, be aware of the following resources that will need to be cleaned up:Note that if you changed the default namespaces or paths such as If you see issues tearing down the cluster, see the If you are tearing down a cluster frequently for development purposes, it is instead recommended to use an environment such as Minikube that can easily be reset without worrying about any of these steps.First you will need to clean up the resources created on top of the Rook cluster.These commands will clean up the resources from the After those block and file resources have been cleaned up, you can then delete your Rook cluster. kubectl delete -f kube-registry.yaml rook-ceph namespace: The Rook operator and cluster created by operator.yaml and cluster.yaml (the cluster CRD) /var/lib/rook: Path on each host in the cluster where configuration is cached by the ceph mons and osds; ... First you will need to clean up the resources created on top of the Rook cluster. Certainly looks cleaner and makes feature delivery a no-brainer.How are we handling the case where the rook operator might be doing OSD operations simultaneously to this imperative operation? IMPORTANT: The final cleanup step requires deleting files on each host in the cluster. On the OSD node, find the ID: # systemctl status ceph-osd@* The results list the ID of the node in a format similar to: ceph-osd@ 1.service - Ceph object storage daemon osd. We only have good devices to test with, and I think we tend to think about things in terms of good disks that we want to remove rather than actual failed disks. I stumbled upon this recently when removing rook ceph namespace - it got stuck in Terminating state. rook.io/v1alpha2: Alpha: Ceph: Ceph is a distributed storage system that provides file, block and object storage and is deployed in large scale production clusters. Rook (deploy+manage via Kubernetes) cephadm (deploy+manage via ssh) Expose provisioning functions to CLI, GUI Create, destroy, start, stop daemons Blink disk lights Pave way for cleanup of docs.ceph.com Automated upgrades ceph-mgr: orchestrator API Rook cephadm CLI DASHBOARD? You may be wondering what Rook is and why you should care. kubectl get namespace rook-ceph -o json > tmp.json; delete kubernetes finalizer in tmp.json (leave empty array "finalizers": []) Improvements. kubectl delete -f kube-registry.yaml In addition, Rook has added expanded support for additional storage solutions, now doubling the number of supported storage solutions in Rook. All files under the dataDirHostPath property specified in the cluster CRD will need to be deleted. Will this operation wait until OSD reconciliation is done in the main operator, and will the main operator wait if there is an osd rm op ongoing?Synchronizing with the operator would indeed be complex. The Linux Foundation has All files under the In the future this step will not be necessary when we build on the K8s local storage feature.If you modified the demo settings, additional cleanup is up to you for devices, host paths, etc.Disks on nodes used by Rook for osds can be reset to a usable state with the following methods:If the cleanup instructions are not executed in the order above, or you otherwise have difficulty cleaning up the cluster, here are a few things to try.The most common issue cleaning up the cluster is that the If a pod is still terminating, you will need to wait or else attempt to forcefully terminate it (If the cluster CRD still exists even though you have executed the delete command earlier, see the next section on removing the finalizer.The operator is responsible for removing the finalizer after the mounts have been cleaned up. ["ceph", "osd", "remove", "", "--yes-i-really-mean-it"] Ceph installation inside Kubernetes can be provisionned using Rook.

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