00_multipass-prep-inventory-and-hosts.yml

---
- name: "AT Computing - HashiCorp Demo - Prep machines, inventory and hosts file."
  hosts: localhost
  connection: local

  vars_files:
    - vars/general/main.yml
    - vars/multipass/main.yml
    - vars/hashicorp/vault.yml
    - "vars/multipass/{{ ansible_os_family }}.yml"

  tasks:
    - name: Check if multipass is present.
      ansible.builtin.stat:
        path: "{{ multipass_binary }}"
      changed_when: false
      register: multipass_presence
      failed_when: not multipass_presence.stat.exists

    - name: Set the server names as a fact.
      ansible.builtin.set_fact:
        server_names: "{{ multipass_instances.servers | join('\\|') }}"

    - name: Set the client names as a fact.
      ansible.builtin.set_fact:
        client_names: "{{ multipass_instances.clients | join('\\|') }}"

    - name: Authentication.
      block:
        - name: Authenticate against Multipass.
          ansible.builtin.command: "multipass authenticate {{ multipass_passphrase }}"
          no_log: true
          changed_when: false
      rescue:
        - name: Guide message for Multipass authentication.
          ansible.builtin.fail:
            msg: "Please make sure you have set the local passphrase to the correct one with: multipass set local.passphrase"

    - name: Check if there are already multipass instances on this machine.
      ansible.builtin.shell: "multipass list | grep '{{ client_names }}\\|{{ server_names }}'"
      changed_when: false
      register: multipass_current
      failed_when: multipass_current.rc not in [0, 1]

    - name: If there are instances already present, ask permission to delete.
      ansible.builtin.pause:
        prompt: "Am I allowed to remove all existing instances that match the names of the instances we want to build? (Y/n)"
        echo: true
      register: prompt_result
      failed_when: (prompt_result.user_input is not defined) or (prompt_result.user_input | lower != "y")
      when: multipass_current.stdout | length > 0

    - name: Delete existing instances.
      ansible.builtin.command: "multipass delete {{ item }}"
      ignore_errors: true
      with_items:
        - "{{ multipass_instances.clients }}"
        - "{{ multipass_instances.servers }}"
      when:
        - prompt_result.user_input is defined
        - prompt_result.user_input | lower == "y"

    - name: Purge the multipass inventory after deletion.
      ansible.builtin.command: "multipass purge"
      changed_when: false
      when:
        - prompt_result.user_input is defined
        - prompt_result.user_input | lower == "y"

    - name: Ensure the cloud-init file is present.
      ansible.builtin.template:
        src: "templates/multipass/at-cloud-init.yml.j2"
        dest: "{{ cloud_init_full_path }}"
        mode: "0644"

    - name: Spin up the multipass instances.
      ansible.builtin.command: "multipass launch --name {{ item }} --cloud-init {{ cloud_init_full_path }} {{ image_name }}"
      register: multipass_output
      changed_when: multipass_output.rc == 0
      with_items:
        - "{{ multipass_instances.servers }}"
        - "{{ multipass_instances.clients }}"

    - name: Ensure we cleanup the used cloud-init file.
      ansible.builtin.file:
        path: "{{ cloud_init_full_path }}"
        state: absent

    - name: Retrieve info on the running servers we've just created.
      ansible.builtin.shell: "multipass list | grep Running | grep '{{ server_names }}' | awk '{print $1,$3}'"
      changed_when: false
      register: multipass_output_servers

    - name: Create the multipass servers fact.
      ansible.builtin.set_fact:
        multipass_servers: "{{ multipass_servers | default([]) + [{'name': item.split(' ')[0], 'ip': item.split(' ')[1]}] }}"
      with_items: "{{ multipass_output_servers.stdout_lines }}"

    - name: Retrieve info on the running clients we've just created.
      ansible.builtin.shell: "multipass list | grep Running | grep '{{ client_names }}' | awk '{print $1,$3}'"
      changed_when: false
      register: multipass_output_clients

    - name: Create the multipass clients fact.
      ansible.builtin.set_fact:
        multipass_clients: "{{ multipass_clients | default([]) + [{'name': item.split(' ')[0], 'ip': item.split(' ')[1]}] }}"
      loop: "{{ multipass_output_clients.stdout_lines }}"

    - name: Ensure new dynamic inventory is created.
      ansible.builtin.template:
        src: templates/general/inventory.j2
        dest: inventory
        mode: "0644"

    - name: Check if this is the first time we're running this.
      ansible.builtin.debug:
        msg: "Re-run this playbook, but now add '--tags hostfile --ask-become-pass'."
      when: groups.all | length == 0

    - name: End the playbook if this is the first run.
      ansible.builtin.meta: end_play
      when: groups.all | length == 0

    - name: Hosts file
      become: true
      tags: hostfile
      block:
        - name: Add a comment block in the hosts file.
          ansible.builtin.blockinfile:
            backup: true
            path: /etc/hosts
            block: |
              # Added for the AT HashiCorp Demo - discard afterwards

        - name: Add the instances to the hosts file.
          ansible.builtin.lineinfile:
            dest: /etc/hosts
            regexp: ".*{{ item }} ({{ demo_fqdn }})?$"
            line: "{{ hostvars[item].ansible_host }} {{ item }}"
            state: present
          when: hostvars[item].ansible_host is defined
          with_items: "{{ groups.all }}"

        - name: Add the demo FQDN to the first client in the host file.
          ansible.builtin.replace:
            path: /etc/hosts
            regexp: "(.*{{ multipass_instances.clients | first }})$"
            replace: '\g<1> {{ demo_fqdn }}'

        - name: Add the vault FQDN to the first server in the host file.
          ansible.builtin.replace:
            path: /etc/hosts
            regexp: "(.*{{ multipass_instances.servers | first }})$"
            replace: '\g<1> {{ vault_ssl_server_common_name }}'