debian.ansible.novnc.server/novnc.yml

---
- name: novnc
  hosts: all
  tasks:
    
    - name: Packages for novnc
      apt:
        name: 
          - novnc
        update_cache: no
        install_recommends: no

    - name: /etc/systemd/system/websockify-novnc.service
      blockinfile:
        path: /etc/systemd/system/websockify-novnc.service
        create: yes
        mode: "0444"
        owner: root
        group: root
        marker: "# {mark} ANSIBLE MANAGED BLOCK"
        block: |
          [Unit]
          Description=Websockify NoVNC
          After=network.target
          
          [Service]
          Type=simple
          ExecStart=/usr/bin/websockify --web=/usr/share/novnc 0.0.0.0:8000 127.0.0.1:5900
          KillMode=process
          Restart=on-failure
          RestartPreventExitStatus=255
          RuntimeDirectory=websockify
          RuntimeDirectoryMode=0755
          
          [Install]
          WantedBy=multi-user.target
          Alias=websockify-novnc.service
        backup: yes
      notify:
      - Restart websockify-novnc

    - name: 'add websockify-novnc to startup'
      command: systemctl enable websockify-novnc
      args:
        creates: /etc/systemd/system/multi-user.target.wants/websockify-novnc.service

    - name: /home/docker/traefik/providers/novnc.yml noVNC<->Traefik provider
      blockinfile:
        path: /home/docker/traefik/providers/novnc.yml
        create: yes
        mode: 0444
        owner: root
        group: docker
        marker: "# {mark} ANSIBLE MANAGED BLOCK"
        block: |
          http:
            routers:
              novnc:
                rule: "Host(`novnc.{{inventory_hostname}}`)"
                service: novnc
                entryPoints:
                  - "https"
                tls:
                  certresolver: letsencrypt
                middlewares: 
                  - "secHeaders@file"
                  - "auth-novnc"
            services:
              novnc:
                loadBalancer:
                  servers:
                    - url: "http://192.168.41.1:8000"
            middlewares:
              auth-novnc:
                basicauth:
                  usersFile: "/etc/traefik/providers.local/novnc.usersfile"
                  removeHeader: true

    - name: /home/docker/traefik/novnc-genpw.sh (generate Random PW for noVNC basic-auth)
      blockinfile:
        path: /home/docker/traefik/novnc-genpw.sh
        create: yes
        mode: 0550
        owner: root
        group: docker
        marker: "# {mark} ANSIBLE MANAGED BLOCK"
        block: |
          cd /home/docker/traefik
          user=admin
          password=$(pwgen -s 32 1)

          [ -f novnc-env ] || echo "USER=!USER!
          PASSWORD=!PASSWORD!
          " >novnc-env
         
          chmod 440 novnc-env
          chown root:docker novnc-env
          sed -i "s/\!USER\!/$user/g" novnc-env
          sed -i "s/\!PASSWORD\!/$password/g" novnc-env
          
          . novnc-env
          echo $(htpasswd -nb $USER $PASSWORD) >providers/novnc.usersfile

        backup: yes
        validate: /bin/bash -n %s

    - name: /home/docker/traefik/novnc-genpw.sh shebang
      lineinfile:
        path: /home/docker/traefik/novnc-genpw.sh
        insertbefore: BOF
        line: "#!/bin/bash -e"

    - name: Gen initial password if not exists
      ansible.builtin.shell: ./novnc-genpw.sh
      args:
        chdir: /home/docker/traefik
        creates: /home/docker/traefik/providers/novnc.usersfile


  handlers:

    - name: Restart websockify-novnc
      service:
        name: websockify-novnc
        state: restarted