turn.yml

---

- hosts: turn
  vars:
    turnserver_secret: !vault |
          $ANSIBLE_VAULT;1.1;AES256
          61643630616332343933343663623032346565636431613332373031663834616662343763353863
          3165323337616264353335613036396663356666666333310a333530383736376134646332633638
          37633763623039326364356661616436663136623838343734316633373936353465636538353366
          6236356562343335370a356530353563353865383635643239666438323365346137626634356533
          31633538363865323066323166323564633439326538386230323132663032653731303165623132
          3064313963616432383936626437313566653637313130666430

  tasks:
    - name: Basic setup
      include_role: name=common
      vars:
        nft_extra: |
          tcp dport {3478, 5349} counter accept comment "coturn listening port"
          udp dport {3478, 5349} counter accept comment "coturn listening port"
          udp dport 32769-65535 counter accept comment "relay ports range"

    - name: Install coturn and certbot
      apt:
        name: [coturn, certbot]
        state: present

    - name: Get TLS certificate
      command: certbot certonly --standalone --preferred-challenges http -d turn.afpy.org -n --agree-tos -m {{ letsencrypt_email | quote }}
      register: certbot
      changed_when: '"no action taken." not in certbot.stdout'

    - name: Ensure coturn can read certs
      file:
        path: /etc/letsencrypt/renewal-hooks/deploy
        state: directory
        mode: 0755

    - name: Configure certbot renewal hook for coturn
      copy:
        dest: /etc/letsencrypt/renewal-hooks/deploy/coturn
        mode: 0755
        content: |
          #!/bin/bash -e
          for certfile in fullchain.pem privkey.pem ; do
              cp -L /etc/letsencrypt/live/turn.afpy.org/"${certfile}" /etc/turnserver/"${certfile}".new
              chown turnserver:turnserver /etc/turnserver/"${certfile}".new
              mv /etc/turnserver/"${certfile}".new /etc/turnserver/"${certfile}"
          done
          systemctl kill -sUSR2 coturn.service

    - name: Configure turnserver
      blockinfile:
        path: /etc/turnserver.conf
        block: |
          fingerprint
          use-auth-secret
          static-auth-secret={{turnserver_secret}}
          realm=afpy.org
          cert=/etc/turnserver/fullchain.pem
          pkey=/etc/turnserver/privkey.pem
          # From https://ssl-config.mozilla.org/ Intermediate, openssl 1.1.0g, 2020-01
          cipher-list="ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384"
          dh-file=/etc/turnserver/dhp.pem
          no-cli
          no-tlsv1
          no-tlsv1_1
          no-loopback-peers
          no-multicast-peers
      notify: restart coturn

    - name: Create dph.pem file directory
      file:
        path: /etc/turnserver
        state: directory
        mode: 0755

    - name: Create dph.pem file
      command: openssl dhparam -dsaparam  -out /etc/turnserver/dhp.pem 2048
      args:
        creates: etc/turnserver/dhp.pem

    - name: Create coturn service directory
      file:
        path: /etc/systemd/system/coturn.service.d
        state: directory
        mode: 0755

    - name: Configure coturn service override
      copy:
        dest: /etc/systemd/system/coturn.service.d/override.conf
        content: |
          [Service]
          LimitNOFILE=1048576
          AmbientCapabilities=CAP_NET_BIND_SERVICE
          Restart=always
      notify: restart coturn

  handlers:
    - name: restart coturn
      systemd:
        name: coturn
        state: restarted
        daemon_reload: true