how to destroy a virt instance

Signed-off-by: Clement Verna <cverna@tutanota.com>

destroy_a_virt_instance.md

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+# How to destroy a virt instance
+
+A playbook is available to destroy a virtual instance.
+
+```
+sudo -i ansible-playbook -vvv /home/fedora/cverna/ansible/playbooks/destroy_virt_inst.yml -e target=osbs-master01.stg.phx2.fedoraproject.org
+```
+
+In some case the instance that you are trying to delete was not in a clean state. You then try to run the following:
+
+Undefined the instance
+
+```
+sudo -i ssh virthost04.stg.phx2.fedoraproject.org 'virsh undefine osbs-node02.stg.phx2.fedoraproject.org'
+```
+
+Remove the logical volume
+
+```
+sudo -i ssh virthost04.stg.phx2.fedoraproject.org 'lvremove /dev/vg_guests/bodhi-backend01.phx2.fedoraproject.org'
+```