Run a playbook:
ansible-playbook --ask-vault-pass -i hosts main.yml
or
ansible-playbook --vault-password-file /home/vlad/ops/vault_pass.txt -i /home/vlad/ops/ansible/hosts /home/vlad/ops/ansible/main.yml
Edit encrypted vars: ansible-vault edit vars/vault.yml
If there's an error while mounting /data, then XFS needs to be checked.
mount: /mnt: mount(2) system call failed: Structure needs cleaning.
xfs_repair /dev/disk/by-label/iscsi-data