algo/roles/common/tasks/main.yml

---

- name: Gather Facts
  setup:

- name: Install software updates
  apt: update_cache=yes upgrade=dist

- name: Check if reboot is required
  shell: >
    if [[ $(readlink -f /vmlinuz) != /boot/vmlinuz-$(uname -r) ]]; then echo "required"; else echo "no"; fi
  args:
    executable: /bin/bash
  register: reboot_required

- name: Reboot
  shell: sleep 2 && shutdown -r now "Ansible updates triggered"
  async: 1
  poll: 0
  when: reboot_required is defined and reboot_required.stdout == 'required'
  ignore_errors: true

- name: Wait for shutdown
  local_action: wait_for host={{ inventory_hostname }} port=22 state=stopped timeout=120
  when: reboot_required is defined and reboot_required.stdout == 'required'
  become: false

- name: Wait until SSH becomes ready...
  local_action: wait_for host={{ inventory_hostname }} port=22 state=started timeout=120
  when: reboot_required is defined and reboot_required.stdout == 'required'
  become: false

# SSH fixes

- name: SSH config
  lineinfile: dest="{{ item.file }}" regexp="{{ item.regexp }}" line="{{ item.line }}" state=present
  with_items:
    - { regexp: '^PasswordAuthentication.*', line: 'PasswordAuthentication no', file: '/etc/ssh/sshd_config'  }
    - { regexp: '^PermitRootLogin.*', line: 'PermitRootLogin without-password', file: '/etc/ssh/sshd_config' }
    - { regexp: '^UseDNS.*', line: 'UseDNS no', file: '/etc/ssh/sshd_config' }
    - { regexp: '^Ciphers', line: 'Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com', file: '/etc/ssh/sshd_config' }
    - { regexp: '^MACs', line: 'MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com', file: '/etc/ssh/sshd_config' }
    - { regexp: '^KexAlgorithms', line: 'KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256', file: '/etc/ssh/sshd_config' }
  notify:
    - restart ssh

- name: Disable MOTD on login and SSHD
  replace: dest="{{ item.file }}" regexp="{{ item.regexp }}" replace="{{ item.line }}"
  with_items:
    - { regexp: '^session.*optional.*pam_motd.so.*', line: '# MOTD DISABLED', file: '/etc/pam.d/login' }
    - { regexp: '^session.*optional.*pam_motd.so.*', line: '# MOTD DISABLED', file: '/etc/pam.d/sshd' }

- name: Install tools
  apt: name="{{ item }}" state=latest
  with_items:
    - git
    - screen
    - apparmor-utils
    - uuid-runtime
    - coreutils
    - rsyslog
    - sendmail
    - unattended-upgrades
    - iptables-persistent

- name: Configure unattended-upgrades
  template: src=50unattended-upgrades.j2 dest=/etc/apt/apt.conf.d/50unattended-upgrades owner=root group=root mode=0644

- name: Periodic upgrades configured
  template: src=10periodic.j2 dest=/etc/apt/apt.conf.d/10periodic owner=root group=root mode=0644