anthos-bm-edge-deployment/roles/ready-ubuntu/tasks/setup-ssh-pub-key-access.yaml

# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
#      http://www.apache.org/licenses/LICENSE-2.0
#
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### Add pub-key to facts by name
- name: Get Public Key
  shell: "cat {{ ssh_user_home }}/{{ ssh_key_name }}.pub"
  register: key_value
  tags:
  - abm-authorized-keys
  - abm-ssh

- name: Add key to dictionary
  set_fact:
    keys: "{{ keys | default({}) | combine( { cluster_name: key_value.stdout } ) }}"
    cacheable: true
  tags:
  - abm-authorized-keys
  - abm-ssh

- name: Create temporary file
  become: no
  run_once: true
  local_action:
    module: ansible.builtin.tempfile
    state: file
    suffix: temp
    path: "${HOME}"
  register: tempfile_1
  tags:
  - abm-ssh
  - abm-authorized-keys
  - create-local-temp

- name: Display path to to Temp file
  debug:
    msg: "{{ tempfile_1.path }}"
  tags:
  - abm-ssh
  - abm-authorized-keys
  - create-local-temp

- name: Create tmp authorized_keys file contain all pub keys
  become: no
  local_action:
    module: lineinfile
    line: "{{ item.value }}"
    dest: "{{ tempfile_1.path }}"
    create: true
  loop:
    - "{{ lookup('dict', keys) }}"
  tags:
  - abm-ssh
  - abm-authorized-keys

### Loop pub-key facts and add all of them to {{ ssh_user_home }}/authorized_keys
- name: Copy authorized_keys to remote
  ansible.builtin.copy:
    src: "{{ tempfile_1.path }}"
    dest: "{{ ssh_user_home }}/authorized_keys"
    mode: '0600'
    owner: "{{ abm_install_user }}"
    group: "{{ abm_install_user }}"
  tags:
  - abm-ssh
  - abm-authorized-keys

- name: Remove the temp file after copying
  local_action:
    module: ansible.builtin.file
    path: "{{ tempfile_1.path }}"
    state: absent
  when: tempfile_1.path is defined
  tags:
  - abm-ssh
  - abm-authorized-keys
  - delete-local-temp

### Setup keyless ssh across cluster
- name: Setup keyless SSH from primary to all others in group
  command:
    cmd: ssh-keyscan {{ machine }} >> {{ ssh_user_home }}/known_hosts
  when:
    - (primary_cluster_machine is defined)
    - (primary_cluster_machine == true)
    - (control_plane_ip != machine)
  loop: "{{ control_plane_ips }}"
  loop_control:
    loop_var: machine
  tags:
  - abm-ssh
  - debug-ssh
  - abm-authorized-keys

### Test by ssh 10.200.0.x 'echo hi'
- name: verify SSH access to other machines
  command:
    cmd: ssh {{abm_install_user}}@{{ machine }} -i {{ ssh_user_home }}/{{ ssh_key_name }} 'echo this-works'
  when:
    - (primary_cluster_machine is defined)
    - (primary_cluster_machine == true)
    - (control_plane_ip != machine)
    - (is_cloud_resource is defined)
    - (is_cloud_resource == True)
  loop: "{{ control_plane_ips }}"
  loop_control:
    loop_var: machine
  tags:
  - abm-ssh
  - debug-ssh