From 2834d86e927d33c07c90a489aadd933228189c66 Mon Sep 17 00:00:00 2001
From: Andrew Wang <someone.zip@gmail.com>
Date: Mon, 4 Oct 2021 20:41:57 -0400
Subject: [PATCH] add cleanup playbook for libvirt

---
 README.md           |  1 +
 libvirt/README.md   | 13 +++++++++---
 libvirt/cleanup.yml | 49 +++++++++++++++++++++++++++++++++++++++++++++
 libvirt/main.yml    |  1 +
 4 files changed, 61 insertions(+), 3 deletions(-)
 create mode 100644 libvirt/cleanup.yml

diff --git a/README.md b/README.md
index ee6599f..8f7d465 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ Follow instructions in the [readme](qemu/README.md) of the qemu directory.
 Follow the instructions in [readme](libvirt/README.md) of the libirt directory.
 
 ## Issues/Remarks
+- vm is set to autostart when installing using libvirt playbook
 - cron config `/etc/cron.d/csc-mirror` is commented out for now
 - merlin.service is NOT started
 - outsider/insider
diff --git a/libvirt/README.md b/libvirt/README.md
index f63d517..31ac7d5 100644
--- a/libvirt/README.md
+++ b/libvirt/README.md
@@ -26,9 +26,8 @@ $ pacman -S qemu libvirt virt-install virt-viewer ansible
 ```
 ## Running the Playbook
 
-Run the playbook from one directory down
 ```
-ansible-playbook -K libvirt/main.yml
+ansible-playbook -K main.yml
 ```
 Then connect to the created vm using virt-viewer
 ```
@@ -67,6 +66,14 @@ $ apt install git ansible
 $ git clone https://git.csclub.uwaterloo.ca/public/mirror-env.git
 ```
 Then enter `mirror-env/mirror` and follow the instructions there.
+
+## Deleting the VM
+
+The VM and everything related can be removed by running the `cleanup.yml` playbook
+```
+ansible-playbook -K cleanup.yml
+```
+
 ## Troubleshooting
 
 ```
@@ -75,7 +82,7 @@ net.ipv4.ip_forward = 1
 ```
 modprobe kvm_intel
 ```
-If running in `/root` may need to edit config
+If running as `root` may need to edit config
 ```
 # edit /etc/libvirt/qemu.conf
 user = "root"
diff --git a/libvirt/cleanup.yml b/libvirt/cleanup.yml
new file mode 100644
index 0000000..c900028
--- /dev/null
+++ b/libvirt/cleanup.yml
@@ -0,0 +1,49 @@
+---
+- name: delete the mirror vm
+  hosts: 127.0.0.1
+  gather_facts: no
+  become: yes
+  tasks:
+    - name: mirbr0 network exists
+      command: "virsh net-dumpxml mirbr0"
+      changed_when: false
+      ignore_errors: true
+      register: net_exists
+
+    - name: storage pool exists
+      command: "virsh pool-dumpxml mirror"
+      changed_when: false
+      ignore_errors: true
+      register: pool_exists
+
+    - name: mirror vm exists
+      command: "virsh dumpxml mirror"
+      changed_when: false
+      ignore_errors: true
+      register: vm_exists
+
+    - name: delete vm
+      command: "virsh {{ item }}"
+      loop:
+        - destroy mirror
+        - undefine mirror
+      when: vm_exists.rc == 0
+
+    - name: delete storage pool
+      command: "virsh {{ item }}"
+      loop:
+        - pool-destroy mirror
+        - pool-undefine mirror
+      when: pool_exists.rc == 0
+
+    - name: delete mirbr0 bridge network
+      command: "virsh {{ item }}"
+      loop: 
+        - net-destroy mirbr0
+        - net-undefine mirbr0
+      when: net_exists.rc == 0
+
+    - name: delete directory for vm
+      file:
+        path: "{{ playbook_dir }}/vm"
+        state: absent
\ No newline at end of file
diff --git a/libvirt/main.yml b/libvirt/main.yml
index 55a4180..2e67cdd 100644
--- a/libvirt/main.yml
+++ b/libvirt/main.yml
@@ -2,6 +2,7 @@
 - name: setup mirror vm
   hosts: 127.0.0.1
   gather_facts: no
+  become: yes
   tasks:
     - name: mirbr0 network exists
       command: "virsh net-dumpxml mirbr0"