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--- lab:ansible_virtualbox_autoboot_linux:delete_the_first_ubuntu_vm_using_ansible [2024/01/20 16:40] – [Better Playbook] user
+++ lab:ansible_virtualbox_autoboot_linux:delete_the_first_ubuntu_vm_using_ansible [2024/05/10 05:15] (current) – removed user
@@ Line 1: / Line 1: @@
-====== Delete the first Ubuntu VM using Ansible ======
-Let's look at using Ansible to remove this first VM. Exit out of the user ''ansible''.
-===== Simple Playbook =====
-<file yaml destroy_vm.yml>
----
-- hosts: localhost  # Run on the local machine
-  connection: local
-  gather_facts: false
-  vars_files:
-    - variables.yml
-  vars:
-    vm_name: my_vm
-  tasks:
-  - name: Remove any old VM with this name
-    command: "{{ Global.vboxmanage_path }} unregistervm --delete {{ vm_name }}"
-</file>
-Try this with the VM running. Note how it fails.
-===== Attempt 2 Playbook =====
-<file yaml destroy_vm.yml>
----
-- hosts: localhost  # Run on the local machine
-  connection: local
-  gather_facts: false
-  vars_files:
-    - variables.yml
-  vars:
-    vm_name: my_vm
-  tasks:
-  - name: Shut down VM with this name
-    command: "{{ Global.vboxmanage_path }} controlvm {{ vm_name }} acpipowerbutton"
-  - name: Remove any old VM with this name
-    command: "{{ Global.vboxmanage_path }} unregistervm --delete {{ vm_name }}"
-</file>
-Try this with the VM running. Note how it fails to work as expected. The vm stops, but is not removed. If you run it a second time, it fails on the shutdown command.
-What ideas do you have to make the script work, shutting down the VM if necessary before removing it? There are many ways.
-===== Better Playbook =====
-This is a quick and dirty solution, no better than running the commands manually.
-Bring the VM using ''vboxmanage startvm my_vm'' then run the follow script as ''ansible-playbook destroy_vm.yml''
-<file yaml destroy_vm.yml>
----
-- hosts: localhost  # Run on the local machine
-  connection: local
-  gather_facts: false
-  vars_files:
-    - variables.yml
-  vars:
-    vm_name: my_vm
-  tasks:
-  - name: Shut down VM with this name
-    command: "{{ Global.vboxmanage_path }} controlvm {{ vm_name }} acpipowerbutton"
-  - name: Pause 1 minute
-    pause:
-      minutes: 1
-  - name: Remove any old VM with this name
-    command: "{{ Global.vboxmanage_path }} unregistervm --delete {{ vm_name }}"
-</file>
-===== Why So Complicated? =====
-Oracle Virtualbox doesn't have the nice modules for Ansible that VMware vCenter has. The GUI interface is the easiest, but we can do the changes by command line.
-Ansible can do the logic we want, but it's not straightforward:
-  - Is the VM powered on? How can we check that with Ansible?
-    * If yes, power it off
-  - Is the VM now off?
-  - Delete the VM
-  - And yes, error handling
-wait_for is a useful command. You wait for an ssh probe on stop working on the server. Or we could store the VM servers we create in a local table by VM, hostname name and IP. Our scripts could use that data.
-====== Next Step ======
-OK, we did the easy bit first. When you are ready for a challenge, continue to [[Deploy a Fleet of VMs]]
-Or back to [[Test the First Ubuntu VM on Ansible]]