EX294 Question #9: Real Exam Question with Answer & Explanation

Question

09. Creating and Using Logical Volumes Create a playbook named /home/greg/ansible/lv.yml that will run on all managed nodes to perform the following tasks: Create a logical volume that meets the following requirements: - The logical volume is created in the research volume group. - The size of the logical volume is 1500 MiB. - Format the logical volume using the ext4 file system. - If unable to create the requested size for the logical volume, display an error message and fallback to using a size of 800MiB. - Could not create logical volume of that size - Display an error message if the volume group research does not exist. - Volume group does not exist - Do not mount the logical volume in any way. Correct Answer: See the below explanation Explanation Explanation/Reference: Solution: [greg@control ansible]$ ansible-navigator doc community.general.lvol -m stdout [greg@control ansible]$ ansible-navigator doc community.general.filesystem -m stdout [greg@control ansible]$ ansible-doc debug [greg@control ansible]$ ansible-doc stat [greg@control ansible]$ vim /home/greg/ansible/lv.yml --- - name: Create LVM hosts: all tasks: - block: - name: lv 1500M community.general.lvol: vg: research lv: data size: 1500 - name: Create ext4 community.general.filesystem: fstype: ext4 dev: /dev/research/data rescue: - name: Could not create lvm ansible.builtin.debug: msg: Could not create logical volume of that size - name: lv 800M community.general.lvol: vg: research lv: data size: 800 - name: Create ext4 community.general.filesystem: fstype: ext4 dev: /dev/research/data when: ansible_lvm.vgs.research is defined - debug: msg: Volume group done not exist when: ansible_lvm.vgs.research is not defined [greg@control ansible]$ ansible-navigator run /home/greg/ansible/lv.yml -m stdout # Observing the execution process of the Ansible playbook to determine if it meets the requirements, and combining it with the 'blkid' command for verification (mandatory operation). [greg@control ansible]$ ansible all -m shell -a 'lvs' [greg@control ansible]$ ansible all -m shell -a 'blkid /dev/research/data'