watch-ocaml-org.md

title
watch.ocaml.org

watch.ocaml.org is a deployment of PeerTube.

Docker deployments of PeerTube typically uses this docker-compose.yml file and following the instructions, however this limits our ability to run docker service update to refresh the Docker image when a new version is released.

We will use Ansible to deploy a Docker service stack which will be peridically updated using ocurrent deployer.

The Ansible playbook is shown below. There are some initial setup steps to prepopulate the SSL certificate and secrets followed by a docker stack which implements the docker-compose.yml file.

- hosts: watch.ocaml.org
  name: Install Peer Tube
  tasks:
    - name: Query certbot volume
      docker_volume_info:
        name: certbot-conf
      register: result
    - name: Create certbot volume
      shell:
        cmd: docker volume create certbot-conf 
      when: not result.exists
    - name: Initialise a certbot certificate
      shell:
        cmd: docker run --rm --name certbot -p 80:80 -v "certbot-conf:/etc/letsencrypt" certbot/certbot certonly --standalone -d watch.ocaml.org --expand -n --agree-tos -m [email protected]
      when: not result.exists
    - name: Download the nginx configuration file from the template
      shell:
        cmd: docker run --rm -v nginx-conf:/etc/nginx/conf.d bash wget https://raw.githubusercontent.com/Chocobozzz/PeerTube/master/support/nginx/peertube -O /etc/nginx/conf.d/peertube.template
    - name: Copy environment
      copy:
        src: secrets/env
        dest: /root/.env
        mode: 0600
    - name: set up deployer stack
      docker_stack:
        name: infra
        prune: yes
        compose:
          - version: "3.3"
            services:
              webserver:
                image: chocobozzz/peertube-webserver:latest
                env_file:
                  - /root/.env
                deploy:
                  mode: global
                ports:
                 - target: 80
                   published: 80
                   protocol: tcp
                   mode: host
                 - target: 443
                   published: 443
                   protocol: tcp
                   mode: host
                volumes:
                  - nginx-conf:/etc/nginx/conf.d
                  - peertube-assets:/var/www/peertube/peertube-latest/client/dist:ro
                  - peertube-data:/var/www/peertube/storage
                  - certbot-www:/var/www/certbot
                  - certbot-conf:/etc/letsencrypt
                depends_on:
                  - peertube
                restart: "always"
              certbot:
                container_name: certbot
                image: certbot/certbot
                volumes:
                  - certbot-conf:/etc/letsencrypt
                  - certbot-www:/var/www/certbot
                restart: unless-stopped
                entrypoint: /bin/sh -c "trap exit TERM; while :; do certbot renew --webroot -w /var/www/certbot; sleep 12h & wait $${!}; done;"
                depends_on:
                  - webserver
              peertube:
                image: chocobozzz/peertube:production-bullseye
                env_file:
                  - /root/.env
                ports:
                 - "1935:1935"
                volumes:
                  - peertube-assets:/app/client/dist
                  - peertube-data:/data
                  - peertube-conf:/config
                depends_on:
                  - postgres
                  - redis
                  - postfix
                restart: "always"
              postgres:
                env_file:
                  - /root/.env
                image: postgres:13-alpine
                volumes:
                  - postgres:/var/lib/postgresql/data
                restart: "always"
              redis:
                image: redis:6-alpine
                volumes:
                  - redis:/data
                restart: "always"
              postfix:
                image: mwader/postfix-relay
                env_file:
                  - /root/.env
                volumes:
                  - opendkim:/etc/opendkim/keys
                restart: "always"
            volumes:
              peertube-assets:
                external: true
              peertube-data:
                external: true
              peertube-conf:
                external: true
              nginx-conf:
                external: true
              certbot-conf:
                external: true
              certbot-www:
                external: true
              opendkim:
                external: true
              redis:
                external: true
              postgres:
                external: true

The website site is backed up using Tarsnap. The Ansible playbook below installs Tarsnap on Ubuntu.

The backup script is perodically run using ocurrent deployer.

- hosts: watch.ocaml.org
  name: Install Tarsnap
  tasks:
  - name: Download Tarsnap's PGP public key
    apt_key:
      url: https://pkg.tarsnap.com/tarsnap-deb-packaging-key.asc
      keyring: /usr/share/keyrings/tarsnap-archive-keyring.gpg
      state: present
  - name: Add Tarsnap Repository
    apt_repository:
      repo:  "deb [signed-by=/usr/share/keyrings/tarsnap-archive-keyring.gpg] http://pkg.tarsnap.com/deb/{{ ansible_distribution_release|lower }} ./"
      filename: tarsnap
      state: present
      update_cache: yes
  - name: Install Tarsnap
    package:
      name: tarsnap
      state: present
  - name: Copy tarsnap key
    copy:
      src: secrets/tarsnap.key
      dest: /root/tarsnap.key
      mode: 0600