Rook Ceph RBD storage classes for Kubernetes
Offering block volumes to stateful workloads: pools and replication per StorageClass, reclaim policies, volume expansion and choosing RBD for databases versus CephFS for shared data.
Ceph on Kubernetes with Rook
Specific tasks for running or consuming Ceph from Kubernetes with the Rook operator: block, file and object storage for workloads, external clusters, snapshots and upgrades.
Shared ReadWriteMany volumes with Rook and CephFS
Giving many pods the same file system: CephFS StorageClasses, subvolume groups, metadata server sizing for many small files and quotas per volume.
S3 buckets for Kubernetes apps with Rook ObjectBucketClaims
Self-service buckets for applications: the bucket StorageClass, claims that produce a Secret and ConfigMap, new versus existing buckets, reclaim policies and object store users.
Connecting Kubernetes to an existing Ceph cluster with Rook external mode
Using a cephadm-managed cluster from one or more Kubernetes clusters: provider and consumer roles, exporting and importing connection details, pools to create first and updating CephX caps on upgrades.
Upgrading Rook and Ceph on Kubernetes
Upgrading the operator and the Ceph version as two steps: Helm chart order, manifest upgrades, health checks before and after, and stepping through Rook minor releases.
Kubernetes volume snapshots and clones with Rook Ceph CSI
Using CSI snapshots and clones for RBD and CephFS volumes: snapshot classes, cloning from snapshots, how they map to RBD snapshots and CephFS subvolume clones, and limits for backups.
