ceph osd pool set my -pool crush_rule rack -rule 3. Verify the pool settings: ceph osd pool get my -pool crush_rule Explanation: Custom CRUSH rules allow you to define how data is distributed across physical locations, improving fault tolerance. Create a CephFS snapshot and restore files from the snapshot. ee the solution below. Solution: 1. Create a CephFS snapshot: ceph fs subvolume snapshot create myfs my -subvolume my -snapshot 2. Restore files from the snapshot: ceph fs subvolume snapshot restore myfs my -subvolume my -snapshot /restore -path Explanation: Snapshots in CephFS provide a point -in-time copy of data, enabling recovery of files or directories as needed. Set up and verify Ceph’s telemetry module to share usage statistics. ee the solution below. Solution: 1. Enable telemetry: ceph telemetry on 2. Check the telemetry status: ceph telemetry status
Explanation: The telemetry module collects and shares anonymized usage data, helping improve Ceph features and performance. Perform a rolling upgrade of the Ceph cluster to a newer version. ee the solution below. Solution: 1. Upgrade the MON nodes: ceph orch upgrade start --image <new -version -image> 2. Upgrade the OSD nodes: ceph orch upgrade osd --image <new -version -image> 3. Verify the upgrade: ceph -s Explanation: Rolling upgrades allow the cluster to remain operational while nodes are upgraded one at a time, ensuring minimal downtime. Create an erasure -coded pool with a custom profile that tolerates two disk failures. ee the solution below. Solution: 1. Create a custom erasure code profile: ceph osd erasure -code -profile set my -profile k=3 m=2 2. Create the erasure -coded pool: ceph osd pool create my -ec-pool 128 128 erasure my -profile 3. Verify the pool settings:
ceph osd pool get my -ec-pool erasure_code_profile Explanation: The k=3, m=2 configuration allows the pool to tolerate up to two simultaneous disk failures, ensuring high data availability. Reweight OSDs based on their available capacity to rebalance the cluster. ee the solution below. Solution: 1. Check the current OSD utilization: ceph osd df tree 2. Reweight the OSDs: ceph osd reweight -by-utilization 3. Verify the reweighting: ceph osd tree Explanation: Reweighting OSDs ensures optimal data distribution, reducing hotspots and balancing the cluster’s storage utilization. Enable and configure Ceph’s performance counters for detailed monitoring. ee the solution below. Solution: 1. Enable performance counters: ceph config set mon debug_osd 20 ceph config set osd debug_filestore 20 2. Check performance metrics:
ceph daemon osd.<osd_id> perf dump Explanation: Performance counters provide detailed metrics on cluster operations, helping diagnose performance bottlenecks. Create a CephFS subvolume and set quotas on it. ee the solution below. Solution: 1. Create a subvolume: ceph fs subvolume create myfs my -subvolume 2. Set a quota on the subvolume: ceph fs subvolume set -quota myfs my -subvolume --max-bytes 10G 3. Verify the quota: ceph fs subvolume info myfs my -subvolume Explanation: Subvolume quotas restrict the amount of storage consumed, ensuring fair allocation of resources in a multi -tenant environment. Remove an unused pool and reclaim storage in the Ceph cluster. ee the solution below. Solution: 1. Delete the pool: ceph osd pool delete my -pool my -pool --yes-i-really -really -mean -it 2. Verify the pool removal: ceph osd pool ls
Explanation: Removing unused pools frees up storage space and simplifies cluster management. Monitor and resolve placement group (PG) imbalance in a pool. ee the solution below. Solution: 1. Check the PG distribution: ceph pg dump | grep <pool_name> 2. Rebalance the PGs: ceph osd pool set <pool_name> pgp_num <new_value> 3. Verify the rebalancing: ceph -s Explanation: Rebalancing PGs ensures even distribution across OSDs, improving data reliability and cluster performance. Configure a Ceph RBD image as a persistent volume in Kubernetes. ee the solution below. Solution: 1. Create a Kubernetes Secret for Ceph credentials: apiVersion: v1 kind: Secret metadata: name: ceph -secret data: key: <base64 -encoded -key> 2. Define a PersistentVolume:
➢ TOTAL QUESTIONS: 479 Install a containerized Red Hat Ceph Storage server on a physical system using Ansible playbooks. Verify the installation. ee the solution below. Solution: 1. Install required packages: yum install ceph -ansible -y 2. Edit the Ansible inventory file (inventory.yml): [mons] node1 ansible_host=192.168.0.10 [osds] node2 ansible_host=192.168.0.11 3. Deploy the Ceph cluster: ansible -playbook -i inventory.yml site.yml 4. Verify the cluster status: ceph -s Explanation: Ansible playbooks automate the setup of a containerized Ceph Storage cluster. Verifying with ceph -s ensures the cluster is operational. Deploy a virtualized Red Hat Ceph Storage server using Podman and Ceph container images. Verify the containerized services are running. ee the solution below.
