From 148ffb23f5112d905c1c22e7b0da959a30fa9620 Mon Sep 17 00:00:00 2001
From: Ian Tangney <ian.tangney@kasmweb.com>
Date: Thu, 16 Sep 2021 13:30:42 +0000
Subject: [PATCH] Resolve KASM-1918 "Feature/ uninstall playbook"

---
 README.md                      | 22 ++++++++-
 roles/uninstall/tasks/main.yml | 83 ++++++++++++++++++++++++++++++++++
 uninstall_kasm.yml             |  6 +++
 3 files changed, 110 insertions(+), 1 deletion(-)
 create mode 100644 roles/uninstall/tasks/main.yml
 create mode 100644 uninstall_kasm.yml

diff --git a/README.md b/README.md
index dc3a211..6aa87cb 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ The steps below for installing Ansible have been tested on CentOS 7.9.2009, Cent
     `ansible --version`
 
 ## Kasm Multi Server install
-This project will deploy Kasm Workspaces in a multi-server deployment using Ansible. 
+This playbook will deploy Kasm Workspaces in a multi-server deployment using Ansible. 
 
 * It installs the kasm components on the systems specified in the ansible `inventory` required for the respective roles (db, web, agent).
 * It creates a new swapfile to ensure that the total swap space matches the size `desired_swap_size` specified on the files in group_vars/.
@@ -60,3 +60,23 @@ It has been tested on CentOS 7.9.2009, CentOS 8.4.2105, Debian 9.13, Debian 10.1
 4. Login to the deployment as admin@kasm.local using the IP of one of the WebApp servers (eg https://192.168.1.2)
 
 5. Navigate to the Agents tab, and enable each Agent after it checks in. (May take a few minutes)
+
+## Kasm Uninstall playbook
+
+This playbook uninstalls Kasm workspaces from DB, WebApp and Agent servers specified in the `inventory` file.
+
+It has been tested on CentOS 7.9.2009, CentOS 8.4.2105, Debian 9.13, Debian 10.10, Ubuntu 18.04.5, and Ubuntu 20.04.3
+
+### Ansible Configuration
+
+1. Open `inventory` file and fill in the hostnames / ips for the servers that will be fulfilling the agent, webapp and db roles. 
+
+3. Run the deployment.
+
+    `ansible-playbook -Kk -u [username] -i inventory uninstall_kasm.yml`
+
+    Ansible will prompt you for the ssh password and sudo password (will almost always be the same password).
+
+    Or, if you have ssh keys copied over to your servers and have NOPASSWD in sudoers you can just run.
+
+    `ansible-playbook -u [username] -i inventory uninstall_kasm.yml`
diff --git a/roles/uninstall/tasks/main.yml b/roles/uninstall/tasks/main.yml
new file mode 100644
index 0000000..34d5e10
--- /dev/null
+++ b/roles/uninstall/tasks/main.yml
@@ -0,0 +1,83 @@
+- name: Check for kasm service containers
+  shell: docker ps -f name=kasm_* -q
+  register: service_containers
+  changed_when: false
+  become: true
+  ignore_errors: true
+
+- name: Remove any kasm service containers
+  shell: "docker rm -f {{ item }}"
+  become: true
+  ignore_errors: true
+  with_items: "{{ service_containers.stdout_lines }}"
+
+- name: Check for kasm session containers
+  shell: docker container ls -qa --filter=label=kasm.kasmid
+  register: session_containers
+  changed_when: false
+  become: true
+  ignore_errors: true
+  
+- name: Remove any kasm session containers
+  shell: "docker rm -f {{ item }}"
+  ignore_errors: true
+  become: true
+  with_items: "{{ session_containers.stdout_lines }}"
+
+- name: Check for kasm docker network
+  shell: docker network ls -q -f name=kasm_default_network
+  register: kasm_network
+  become: true
+  ignore_errors: true
+  changed_when: false
+
+- name: Remove kasm docker network
+  shell: docker network rm kasm_default_network
+  ignore_errors: true
+  become: true
+  when: kasm_network.stdout | length > 0
+
+- name: Get kasm database docker volume
+  shell: docker volume ls --filter name=kasm_db_* -q
+  ignore_errors: true
+  become: true
+  register: kasm_database
+  changed_when: false
+
+- name: Remove kasm database docker volume
+  shell: "docker volume rm {{ item }}"
+  ignore_errors: true
+  become: true
+  with_items: "{{ kasm_database.stdout_lines }}"
+
+- name: Get kasm docker images
+  shell: |
+    docker images --filter "label=com.kasmweb.image=true" -q
+    docker images kasmweb/nginx -q
+    docker images kasmweb/share -q
+    docker images kasmweb/share-private -q
+    docker images kasmweb/agent -q
+    docker images kasmweb/agent-private -q
+    docker images kasmweb/manager -q
+    docker images kasmweb/manager-private -q
+    docker images kasmweb/api -q
+    docker images kasmweb/api-private -q
+    docker images redis -q
+    docker images postgres -q
+    
+  register: kasm_images
+  become: true
+  ignore_errors: true
+  changed_when: false
+
+- name: Remove kasm docker images
+  shell: "docker rmi {{ item }}"
+  become: true
+  ignore_errors: true
+  with_items: "{{ kasm_images.stdout_lines }}"
+
+- name: Remove kasm install directory
+  file:
+    path: /opt/kasm/
+    state: absent
+  become: true
diff --git a/uninstall_kasm.yml b/uninstall_kasm.yml
new file mode 100644
index 0000000..d33c2ce
--- /dev/null
+++ b/uninstall_kasm.yml
@@ -0,0 +1,6 @@
+- hosts:
+    - db
+    - web
+    - agent
+  roles:
+    - uninstall