home-cluster/bootstrap/templates/ansible/playbooks/cluster-nuke.yaml.j2

#jinja2: trim_blocks: True, lstrip_blocks: True
---
- name: Cluster Nuke
  hosts: kubernetes
  become: true
  gather_facts: true
  any_errors_fatal: true
  vars_prompt:
    - name: nuke
      prompt: |-
        Are you sure you want to nuke this cluster?
        Type 'YES I WANT TO DESTROY THIS CLUSTER' to proceed
      default: "n"
      private: false
  pre_tasks:
    - name: Check for confirmation
      ansible.builtin.fail:
        msg: Aborted nuking the cluster
      when: nuke != 'YES I WANT TO DESTROY THIS CLUSTER'

    - name: Pausing for 5 seconds...
      ansible.builtin.pause:
        seconds: 5
  tasks:
    {% if bootstrap_distribution == "k3s" %}
    - name: Stop Kubernetes # noqa: ignore-errors
      ignore_errors: true
      block:
        - name: Stop Kubernetes
          ansible.builtin.include_role:
            name: xanmanning.k3s
            public: true
          vars:
            k3s_state: stopped
    {% endif %}

    # https://github.com/k3s-io/docs/blob/main/docs/installation/network-options.md
    - name: Networking
      block:
        - name: Networking | Delete Cilium links
          ansible.builtin.command:
            cmd: "ip link delete {% raw %}{{ item }}{% endraw %}"
            removes: "/sys/class/net/{% raw %}{{ item }}{% endraw %}"
          loop: ["cilium_host", "cilium_net", "cilium_vxlan"]
        - name: Networking | Flush iptables
          ansible.builtin.iptables:
            table: "{% raw %}{{ item }}{% endraw %}"
            flush: true
          loop: ["filter", "nat", "mangle", "raw"]
        - name: Networking | Flush ip6tables
          ansible.builtin.iptables:
            table: "{% raw %}{{ item }}{% endraw %}"
            flush: true
            ip_version: ipv6
          loop: ["filter", "nat", "mangle", "raw"]
        - name: Networking | Delete CNI directory
          ansible.builtin.file:
            path: /etc/cni/net.d
            state: absent

    {% if bootstrap_distribution == "k3s" %}
    - name: Check to see if k3s-killall.sh exits
      ansible.builtin.stat:
        path: /usr/local/bin/k3s-killall.sh
      register: check_k3s_killall_script

    - name: Check to see if k3s-uninstall.sh exits
      ansible.builtin.stat:
        path: /usr/local/bin/k3s-uninstall.sh
      register: check_k3s_uninstall_script

    - name: Run k3s-killall.sh
      when: check_k3s_killall_script.stat.exists
      ansible.builtin.command:
        cmd: /usr/local/bin/k3s-killall.sh
      register: k3s_killall
      changed_when: k3s_killall.rc == 0

    - name: Run k3s-uninstall.sh
      when: check_k3s_uninstall_script.stat.exists
      ansible.builtin.command:
        cmd: /usr/local/bin/k3s-uninstall.sh
      args:
        removes: /usr/local/bin/k3s-uninstall.sh
      register: k3s_uninstall
      changed_when: k3s_uninstall.rc == 0

    - name: Ensure hard links are removed
      when:
        - k3s_install_hard_links
        - not ansible_check_mode
      ansible.builtin.file:
        path: "{% raw %}{{ k3s_install_dir }}/{{ item }}{% endraw %}"
        state: absent
      loop: ["kubectl", "crictl", "ctr"]
    {% endif %}

    - name: Remove local storage path
      ansible.builtin.file:
        path: "{% raw %}{{ bootstrap_local_storage_path }}{% endraw %}"
        state: absent

    - name: Reboot
      ansible.builtin.reboot:
        msg: Rebooting nodes
        reboot_timeout: 3600