3. Verify the changes: ceph osd tree Explanation: The CRUSH map manages data placement. Updating OSD locations optimizes redundancy and fault tolerance. Add a new Ceph storage pool with specific replication settings. ee the solution below. Solution: 1. Create a new pool: ceph osd pool create <pool_name> 128 2. Set the replication size: ceph osd pool set <pool_name> size 2 3. Verify the pool settings: ceph osd pool get <pool_name> size Explanation: Storage pools group and manage data in Ceph. Replication settings ensure redundancy and data protection. Remove an existing MON node from the Ceph cluster. ee the solution below. Solution: 1. Remove the MON node: ceph mon remove <mon_id> 2. Verify the removal:
ceph mon stat Explanation: Removing unused or failed MON nodes helps maintain a clean and functional cluster configuration. Configure and apply new Ceph configuration settings to change the osd_max_backfills parameter. ee the solution below. Solution: 1. Set the new parameter value: ceph config set osd osd_max_backfills 4 2. Verify the updated configuration: ceph config get osd osd_max_backfills Explanation: Updating cluster configuration parameters like osd_max_backfills optimizes performance and operational behavior. Add a new disk to an existing OSD node and configure it as a new OSD. ee the solution below. Solution: 1. Prepare the disk: ceph -volume lvm prepare --data /dev/sdc 2. Activate the new OSD: ceph -volume lvm activate <osd_id> 3. Verify the OSD addition: ceph osd tree
Explanation: Adding disks to OSD nodes increases storage capacity and balances data distribution within the cluster. Change the CRUSH map rule for a pool to ensure replication across racks. ee the solution below. Solution: 1. Modify the CRUSH rule: ceph osd crush rule create -replicated <rule_name> default rack 2. Apply the new rule to the pool: ceph osd pool set <pool_name> crush_rule <rule_id> 3. Verify the changes: ceph osd pool get <pool_name> crush_rule Explanation: CRUSH rules control data placement. Configuring replication across racks improves fault tolerance. Increase the PG count of an existing pool to improve performance. ee the solution below. Solution: 1. Verify the current PG count: ceph osd pool get <pool_name> pg_num 2. Set the new PG count: ceph osd pool set <pool_name> pg_num 256 Explanation: Increasing PGs enhances data distribution across OSDs but should be done with caution to avoid
overloading the cluster. Remove an OSD from an existing Ceph cluster and rebalance the data. ee the solution below. Solution: 1. Set the OSD to out: ceph osd out <osd_id> 2. Stop and remove the OSD: systemctl stop ceph -osd@<osd_id> ceph osd crush remove osd.<osd_id> ceph auth del osd.<osd_id> ceph osd rm <osd_id> 3. Verify the rebalancing: ceph osd tree Explanation: Removing an OSD requires rebalancing data to maintain redundancy and prevent data loss. Add an additional MON node to a Ceph cluster with a custom hostname and IP. ee the solution below. Solution: 1. Prepare the new MON node: yum install ceph -mon -y 2. Add the MON node: ceph mon add <mon_name> <ip_address> 3. Verify the MON node:
ceph mon stat Explanation: Adding more MON nodes ensures quorum and high availability in case of node failure. Change the default data replication size for a specific pool. ee the solution below. Solution: 1. Check the current replication size: ceph osd pool get <pool_name> size 2. Set the new replication size: ceph osd pool set <pool_name> size 3 3. Verify the update: ceph osd pool get <pool_name> size Explanation: Updating the replication size improves redundancy or saves storage space, depending on the value. Recover an unhealthy Ceph OSD marked as down. ee the solution below. Solution: 1. Mark the OSD as in: ceph osd in <osd_id> 2. Restart the OSD service: systemctl restart ceph -osd@<osd_id> 3. Check the OSD status:
➢ 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.
