Reset Cluster

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Abstract

This role resets the control planes in your inventory with Kubeadm.

Reset Cluster#

Reset Role Usage#

This role should generally be executed first to attempt to create a fresh environment.

---
###
# ```{rubric} Reset an existing cluster
# ```
# ---
# This playbook runs `kubeadm reset -f`{l=shell} on a control plane node.
#
# ```{literalinclude} /roles/reset/tasks/main.yml
# :language: yaml
# :start-at: "- name: Reset existing cluster\n"
# :end-at: "  register: reset_out\n"
# ```
- name: Ensure required programs
  community.general.pacman:
    executable: yay
    extra_args: "--noconfirm"
    name: "{{ item }}"
    state: present
  loop:
    - kubeadm
    - kubelet
    - kubectl
    - kubie
  become: true
  become_user: "{{ nonroot_user }}"
- name: Make sure the kube group exists
  ansible.builtin.group:
    name: "{{ reset_group }}"
    state: present
- name: Add required users to group
  ansible.builtin.user:
    name: "{{ item }}"
    groups: kube
    append: true
  loop:
    - root
    - "{{ reset_nonroot_user }}"
- name: Reset existing cluster
  ansible.builtin.command:
    cmd: kubeadm reset -f &> /root/reset.md
    removes: /etc/kubernetes/admin.conf
  register: reset_out
- name: Clear CNI config
  ansible.builtin.file:
    dest: /etc/cni/net.d
    state: absent
- name: Re-add CNI config directory
  ansible.builtin.file:
    dest: /etc/cni/net.d
    state: directory
    owner: root
    group: root
    mode: u+rwx,go-rwx
    ###
    # ```{rubric} Show and record output
    # ```
    # ---
    # These tasks display the output from the command above, then write them to
    # disk in a temporary location.
    #
    # ```{literalinclude} /roles/reset/tasks/main.yml
    # :language: yaml
    # :start-at: "- name: Show output\n"
    # ```
- name: Show output
  ansible.builtin.debug:
    var: reset_out
- name: Drop reset output
  ansible.builtin.file:
    dest: /root/reset.md
    state: absent
- name: Stop containerd
  ansible.builtin.service:
    state: stopped
    name: containerd
- name: Stop kubelet
  ansible.builtin.service:
    state: stopped
    name: kubelet
- name: Start containerd
  ansible.builtin.service:
    state: started
    name: containerd
- name: Start kubelet
  ansible.builtin.service:
    state: started
    name: kubelet
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