Initial version of registry files

* Initial draft

* First update after review

* Added certbot to docker-compose

* Second round of review corrections

* Testable version of initial draft

config/etc/nginx/nginx.conf

@@ -0,0 +1,57 @@
+#Template from https://docs.docker.com/registry/recipes/nginx/
+
+events {
+    worker_connections  1024;
+}
+
+http {
+  ## Set a variable to help us decide if we need to add the
+  ## 'Docker-Distribution-Api-Version' header.
+  ## The registry always sets this header.
+  ## In the case of nginx performing auth, the header is unset
+  ## since nginx is auth-ing before proxying.
+  map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
+    '' 'registry/2.0';
+  }
+
+  server {
+    listen 443 ssl;
+    server_name docker.cdot.systems;
+
+    # SSL
+    ssl_certificate /etc/letsencrypt/live/docker.cdot.systems/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/docker.cdot.systems/privkey.pem;
+
+    # Recommendations from https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
+    ssl_protocols TLSv1.1 TLSv1.2;
+    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
+    ssl_prefer_server_ciphers on;
+    ssl_session_cache shared:SSL:10m;
+    ssl_trusted_certificate /etc/letsencrypt/live/docker.cdot.systems/chain.pem;
+
+    # disable any limits to avoid HTTP 413 for large image uploads
+    client_max_body_size 0;
+
+    # required to avoid HTTP 411: see Issue #1486 (https://github.com/moby/moby/issues/1486)
+    chunked_transfer_encoding on;
+
+    location /v2/ {
+      # Do not allow connections from docker 1.5 and earlier
+      # docker pre-1.6.0 did not properly set the user agent on ping, catch "Go *" user agents
+      if ($http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*$" ) {
+        return 404;
+      }
+
+      ## If $docker_distribution_api_version is empty, the header is not added.
+      ## See the map directive above where this variable is defined.
+      add_header 'Docker-Distribution-Api-Version' $docker_distribution_api_version always;
+
+      proxy_pass                          http://registry:5000; #${PORT};
+      proxy_set_header  Host              $http_host;   # required for docker client's sake
+      proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
+      proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
+      proxy_set_header  X-Forwarded-Proto $scheme;
+      proxy_read_timeout                  900;
+    }
+  }
+}

docker-compose.yaml

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+#https://docs.docker.com/registry/deploying/#deploy-your-registry-using-a-compose-file
+services:
+  nginx:
+    image: "nginx:stable-alpine"
+    ports:
+      - 443:443
+    restart: unless-stopped
+    volumes:
+      - ./config/etc/nginx/nginx.conf:/etc/nginx/nginx.conf
+      - /etc/letsencrypt:/etc/letsencrypt
+    depends_on: 
+      - registry
+    command: /bin/sh -c "while :; do sleep 6h & wait $${!}; nginx -s reload; done & nginx -g 'daemon off;'"
+
+  # SSL certificate management for nginx
+  certbot:
+    image: certbot/certbot
+    container_name: 'certbot'
+    volumes:
+      - /etc/letsencrypt:/etc/letsencrypt
+    restart: always
+    # This will check if your certificate is up for renewal every 12 hours as recommended by Let’s Encrypt
+    entrypoint: "/bin/sh -c 'trap exit TERM; while :; do certbot renew; sleep 12h & wait $${!}; done;'"
+
+  registry:
+    restart: always
+    image: registry:2
+    volumes:
+      - /mnt/docker0storage/registry:/var/lib/registry