- name: Playbook to Provision / Re-configure Node
  hosts: all
  vars:
    users:
      - name: arya
        password: {{arya_encrypted_pass}}
      - name: devrand
        password: {{devrand_encrypted_pass}}
      - name: midou
        password: {{midou_encrypted_pass}}
      - name: ansiblerunner
        password: {{ansiblerunner_encrypted_pass}}
  tasks:
    - name: Enable backports
      ansible.builtin.apt_repository:
        repo: deb http://deb.debian.org/debian bookworm-backports main contrib
        state: present
    - name: Install Required Programs / APT
      ansible.builtin.apt:
        name:
          # Misc
          - sudo
          - chrony
          - tmux
          - nala
          - apt-file
          # Monitoring
          - htop
          - gdu
          - btop
          - iotop
          - vnstat
          - neofetch
          - prometheus-node-exporter
          - goaccess
          # Text Editing
          - vim
          - neovim
          - curl
          - wget
          # Backups
          - borgbackup
          - rsync
          # Basic Networking
          - net-tools
          - nmap
          # Python3
          - python3-pip
          - python3-passlib # Ansible User Creation
          - python3-pyroute2 # for smart-ipv6-rotator
          - python3-requests # for smart-ipv6-rotator
          # Speed Tests
          - iperf3
          - speedtest-cli
          # Security
          - ufw
    - name: Enable VNStat service
      ansible.builtin.service:
        name: vnstat
        enabled: true
        state: started
    - name: Enable Chrony (NTP) service
      ansible.builtin.service:
        name: chrony
        enabled: true
        state: started
    - name: Enable Prometheus Node Exporter service
      ansible.builtin.service:
        name: prometheus-node-exporter
        enabled: true
        state: started
    - name: Enable UFW service
      ansible.builtin.service:
        name: ufw
        enabled: true
        state: started

    - name: Disable dmesg logging to console
      ansible.posix.sysctl:
        name: kernel.printk
        value: "3 4 1 3"
        state: present
        sysctl_set: true
    - name: Allow binding to non-local IPs / IPv6
      ansible.posix.sysctl:
        name: net.ipv6.ip_nonlocal_bind
        value: "1"
        state: present
        sysctl_set: true
    - name: Allow IP forwarding / IPv4
      ansible.posix.sysctl:
        name: net.ipv4.ip_forward
        value: "1"
        state: present
        sysctl_set: true
    - name: Allow IP forwarding / IPv6
      ansible.posix.sysctl:
        name: net.ipv6.conf.all.forwarding
        value: "1"
        state: present
        sysctl_set: true
    - name: Swappiness
      ansible.posix.sysctl:
        name: vm.swappiness
        value: "60"
        state: present
        sysctl_set: true

    - name: Bashrc skel
      ansible.builtin.template:
        src: templates/bashrc.j2
        dest: /etc/skel/.bashrc
        mode: preserve
    - name: Profile skel
      ansible.builtin.template:
        src: templates/profile.j2
        dest: /etc/skel/.profile
        mode: preserve
    - name: Bash_aliases skel
      ansible.builtin.template:
        src: templates/bash_aliases.j2
        dest: /etc/skel/.bash_aliases
        mode: preserve
    - name: Prompt skel
      ansible.builtin.template:
        src: templates/prompt.j2
        dest: /etc/skel/.prompt
        mode: preserve
    - name: Bashrc root
      ansible.builtin.template:
        src: templates/bashrc.j2
        dest: /root/.bashrc
        mode: preserve
    - name: Profile root
      ansible.builtin.template:
        src: templates/profile.j2
        dest: /root/.profile
        mode: preserve
    - name: Bash_aliases root
      ansible.builtin.template:
        src: templates/bash_aliases.j2
        dest: /root/.bash_aliases
        mode: preserve
    - name: Prompt root
      ansible.builtin.template:
        src: templates/prompt.j2
        dest: /root/.prompt
        mode: preserve

    - name: Add user
      ansible.builtin.user:
        name: "{{ item.name }}"
        group: users
        groups: users,sudo
        password: "{{ item.password }}"
        shell: /bin/bash
        update_password: on_create # Add the same initial password for all users (can be overwritten by user)
      with_items:
        - "{{ users }}"
    - name: "Add authorized keys"
      ansible.posix.authorized_key:
        user: "{{ item.name }}"
        key: "{{ lookup('file', 'files/' + item + '.pub') }}"
      with_items:
        - "{{ users }}"

    - name: "Allow admin users to sudo without a password"
      ansible.builtin.lineinfile:
        dest: "/etc/sudoers" # path: in version 2.3
        state: "present"
        regexp: "^%sudo"
        line: "%sudo ALL=(ALL) NOPASSWD: ALL"

    - name: Sshd configuration file update
      ansible.builtin.template:
        src: templates/sshd_config.j2
        dest: /etc/ssh/sshd_config
        backup: true
        owner: 0
        group: 0
        mode: "0644"
        validate: "/usr/sbin/sshd -T -f %s"
      notify:
        - Restart sshd
  handlers:
    - name: Restart sshd
      ansible.builtin.service:
        name: ssh
        enabled: true
        state: restarted
  roles:
    - role: geerlingguy.docker
      docker_install_compose_plugin: true
      docker_compose_package: docker-compose-plugin
      docker_compose_package_state: present
    - role: artis3n.tailscale
      # Future Sysadmin seeing this: if this fails; it is because the key is only valid for 365 days (from Jan 6 2024)
      tailscale_authkey: "{{tailscale_authkey}}"
      tailscale_args: "--login-server https://hs.projectsegfau.lt --accept-dns=false"
    - role: borgbase.ansible_role_borgbackup
      borg_repository:
        - ssh://zh3117@zh3117.rsync.net/data1/home/zh3117/backups/{{rsyncnet_slug}}
      borg_source_directories: {{bkp_source_directories}}
      borg_exclude_patterns: {{bkp_exclude_patterns}}
      borg_remote_path: /usr/local/bin/borg_1.2.4/borg1
      borgmatic_hooks:
        postgresql_databases: {{bkp_postgresql_databases}}
        healthchecks:
          ping_url: https://healthchecks.projectsegfau.lt/ping/{{bkp_hc_uuid}}
          states:
            - finish
      borg_retention_policy:
        keep_daily: 7
        keep_weekly: 4
        keep_monthly: 3
      borg_encryption_passcommand: cat /etc/borgmatic/passphrase # very secure I know; it has to be plain text anyway for automated backups, unless there is a better way (in which case please email me@aryak.me)
- name: UFW Firewall Configuration
  hosts: eu,us # IN is behind router so no f/w is needed
  tasks:
    - name: Enable UFW
      community.general.ufw:
        state: enabled
        policy: deny
    - name: Allow all in from tailscale
      community.general.ufw:
        rule: allow
        interface: tailscale0
        direction: in
    - name: Allow all in from wg (if its there)
      community.general.ufw:
        rule: allow
        interface: wg0
        direction: in
    - name: Deny rules
      community.general.ufw:
        rule: allow
        port: {{item.port}}
        proto: {{item.proto}}
      with_items:
        - "{{ ufw_deny_rules }}"