---

- name: This role is only compatible with Debian
  assert:
    that: "ansible_distribution == 'Debian'"
    msg: "Only compatible with Debian"

- name: Install OpenVPN
  apt:
    name: openvpn

- name: Delete unwanted OpenVPN folders
  file:
    state: absent
    path: "/etc/openvpn/{{ item }}"
  with_items:
    - client
    - server

- name: Clone shellpki repo
  git:
    repo: "https://gitea.evolix.org/evolix/shellpki.git"
    dest: /root/shellpki

- name: Create the shellpki user
  user:
    name: shellpki
    system: yes
    create_home: no
    home: "/etc/shellpki"
    shell: "/usr/sbin/nologin"

- name: Create /etc/shellpki
  file:
    path: "/etc/shellpki"
    state: directory

- include_role:
    name: evolix/remount-usr

- name: Copy shellpki files
  copy:
    src: "{{ item.source }}"
    dest: "{{ item.destination }}"
    remote_src: yes
  with_items:
     - { source: "/root/shellpki/openssl.cnf", destination: "/etc/shellpki/openssl.cnf" }
     - { source: "/root/shellpki/shellpki", destination: "/usr/local/sbin/shellpki" }

- include_role:
    name: evolix/remount-usr

- name: Change files permissions
  file:
    path: "{{ item.path }}"
    mode: "{{ item.mode }}"
  with_items:
     - { path: "/etc/shellpki/openssl.cnf", mode: "0640" }
     - { path: "/usr/local/sbin/shellpki", mode: "0755" }

- name: Delete local shellpki repo
  file:
    state: absent
    path: "/root/shellpki"

- name: Change directory owner
  file:
    path: "/etc/shellpki"
    owner: shellpki
    recurse: yes
    state: directory

- name: Add sudo rights
  lineinfile:
    dest: "/etc/sudoers.d/shellpki"
    regexp: '/usr/local/sbin/shellpki'
    line: "%shellpki ALL = (root) /usr/local/sbin/shellpki"
    create: yes
    validate: 'visudo -cf %s'

- name: Deploy OpenVPN client config template
  template:
    src: "ovpn.conf.j2"
    dest: "/etc/shellpki/ovpn.conf"

- name: Generate dhparam
  command: "openssl dhparam -out /etc/shellpki/dh2048.pem 2048"

- include_role:
    name: evolix/remount-usr

- name: Fix CRL rights in shellpki command
  lineinfile:
    path: "/usr/local/sbin/shellpki"
    regexp: '{{ item.regexp }}'
    insertafter: "{{ item.insertafter }}"
    line: "{{ item.line }}"
  with_items:
     - { regexp: '^    chmod 644 /etc/shellpki/crl.pem$', line: "    chmod 644 /etc/shellpki/crl.pem", insertafter: '^    chmod 640 "\${CACERT}"$' }
     - { regexp: '^    chmod 755 /etc/shellpki/$', line: "    chmod 755 /etc/shellpki/", insertafter: '^    chmod 644 /etc/shellpki/crl.pem$' }

- name: Deploy OpenVPN server config
  template:
    src: "server.conf.j2"
    dest: "/etc/openvpn/server.conf"

- name: Is minifirewall installed ?
  stat:
    path: "/etc/default/minifirewall"
  check_mode: no
  register: minifirewall_config

- name: Retrieve the default interface
  shell: "grep '^INT=' /etc/default/minifirewall | cut -d\\' -f 2"
  check_mode: no
  changed_when: false
  register: minifirewall_int

- name: Add minifirewall rule in config file
  lineinfile:
    path: "/etc/default/minifirewall"
    line: "{{ item }}"
  with_items:
     - "# OpenVPN"
     - "/sbin/iptables -t nat -A POSTROUTING -s {{ openvpn_lan }}/{{ openvpn_netmask_cidr }} -o $INT -j MASQUERADE"
  when: minifirewall_config.stat.exists

- name: Activate minifirewall rule
  iptables:
    table: nat
    chain: POSTROUTING
    source: "{{ openvpn_lan }}/{{ openvpn_netmask_cidr }}"
    out_interface: "{{ minifirewall_int.stdout }}"
    jump: MASQUERADE
  when: minifirewall_config.stat.exists

- name: Add 1194/udp OpenVPN port to public services in minifirewall
  replace:
    path: "/etc/default/minifirewall"
    regexp: "^SERVICESUDP1='(.*)?'$"
    replace: "SERVICESUDP1='\\1 1194'"
    backup: yes
  when: minifirewall_config.stat.exists

- name: Activate minifirewall rule for IPv4
  iptables:
    chain: INPUT
    protocol: udp
    destination_port: "1194"
    jump: ACCEPT
    ip_version: ipv4
  when: minifirewall_config.stat.exists

- name: Activate minifirewall rule for IPv6
  iptables:
    chain: INPUT
    protocol: udp
    destination_port: "1194"
    jump: ACCEPT
    ip_version: ipv6
  when: minifirewall_config.stat.exists

- name: Enable forwarding
  sysctl:
    name: net.ipv4.ip_forward
    value: "1"
    sysctl_file: "/etc/sysctl.d/openvpn.conf"

- name: Generate a password for the management interface
  set_fact:
    management_pwd: "{{ lookup('password', '/dev/null length=15 chars=ascii_letters,digits') }}"

- name: Set the management password
  copy:
    dest: "/etc/openvpn/management-pwd"
    content: "{{ management_pwd }}"

- name: Enable openvpn service
  systemd:
    name: "openvpn@server.service"
    enabled: yes

- name: Is NRPE installed ?
  stat:
    path: "/etc/nagios/nrpe.d/evolix.cfg"
  check_mode: no
  register: nrpe_evolix_config

- name: Install NRPE check dependencies
  apt:
    name: libnet-telnet-perl
  when: nrpe_evolix_config.stat.exists

- include_role:
    name: evolix/remount-usr

- name: Install OpenVPN NRPE check
  copy:
    src: "files/check_openvpn.pl"
    dest: "/usr/local/lib/nagios/plugins/check_openvpn"
    mode: "0755"
    owner: root
    group: nagios
  when: nrpe_evolix_config.stat.exists

- name: Add NRPE check
  lineinfile:
    dest: "/etc/nagios/nrpe.d/evolix.cfg"
    regexp: '^command\[check_openvpn\]='
    line: "command[check_openvpn]=/usr/local/lib/nagios/plugins/check_openvpn -H 127.0.0.1 -p 1195 -P {{ management_pwd }}"
  notify: restart nagios-nrpe-server
  when: nrpe_evolix_config.stat.exists

- include_role:
    name: evolix/remount-usr

- name: Install OpenVPN certificates NRPE check
  copy:
    src: "files/check_openvpn_certificates.sh"
    dest: "/usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
    mode: "0755"
    owner: root
    group: nagios
  when: nrpe_evolix_config.stat.exists

- name: Add sudo rights for NRPE check
  lineinfile:
    dest: "/etc/sudoers.d/openvpn"
    regexp: 'check_openvpn_certificates.sh'
    line: "nagios  ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
    create: yes
    validate: 'visudo -cf %s'
  when: nrpe_evolix_config.stat.exists

- name: Add NRPE check
  lineinfile:
    dest: "/etc/nagios/nrpe.d/evolix.cfg"
    regexp: '^command\[check_openvpn_certificates\]='
    line: "command[check_openvpn_certificates]=sudo /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
  notify: restart nagios-nrpe-server
  when: nrpe_evolix_config.stat.exists

# BEGIN TODO : Get this script from master branch when cloning it at the beginning when dev branch is merged with master (this script is currently not available on master branch)
- name: Clone dev branch of shellpki repo
  git:
    repo: "https://gitea.evolix.org/evolix/shellpki.git"
    dest: /root/shellpki-dev
    version: dev

- include_role:
    name: evolix/remount-usr

- name: Copy shellpki script
  copy:
    src: "/root/shellpki-dev/cert-expirations.sh"
    dest: "/usr/share/scripts/cert-expirations.sh"
    mode: "0700"
#    owner: root
#    group: root
    remote_src: yes

- name: Delete local shellpki-dev repo
  file:
    state: absent
    path: "/root/shellpki-dev"
# END TODO

- name: Install cron to warn about certificates expiration
  cron:
    name: "OpenVPN certificates expiration"
    special_time: monthly
    job: '/usr/share/scripts/cert-expirations.sh | mail -E -s "PKI VPN {{ ansible_hostname }} : recapitulatif expirations" {{ client_email }}'

- name: Warn the user about command to execute manually
  pause:
    prompt: |
      /!\ WARNING /!\
      You have to manually create the CA on the server with "shellpki init {{ ansible_fqdn }}". The command will ask you to create a password, and will ask you again to give the same one several times.
      You have to manually generate the CRL on the server with "openssl ca -gencrl -keyfile /etc/shellpki/cakey.key -cert /etc/shellpki/cacert.pem -out /etc/shellpki/crl.pem -config /etc/shellpki/openssl.cnf". The previously created password will be asked
      You have to manually create the server's certificate with "shellpki create {{ ansible_fqdn }}"
      You have to adjuste the config file "/etc/openvpn/server.conf" for the following parameters : local (to check), cert (to check), key (to add), server (to check), push (to complete if needed).
      Finally, you can (re)start the OpenVPN service with "systemctl restart openvpn@server.service"
      
      Press enter to exit when it's done.