authelia: add more nginx configuration

roles/authelia/templates/authelia-auth.conf.j2

@@ -0,0 +1,23 @@
+# Basic Authelia Config
+# Send a subsequent request to Authelia to verify if the user is authenticated
+# and has the right permissions to access the resource.
+auth_request /authelia;
+# Set the `target_url` variable based on the request. It will be used to build the portal
+# URL with the correct redirection parameter.
+auth_request_set $target_url $scheme://$http_host$request_uri;
+# Set the X-Forwarded-User and X-Forwarded-Groups with the headers
+# returned by Authelia for the backends which can consume them.
+# This is not safe, as the backend must make sure that they come from the
+# proxy. In the future, it's gonna be safe to just use OAuth.
+auth_request_set $user $upstream_http_remote_user;
+auth_request_set $groups $upstream_http_remote_groups;
+auth_request_set $name $upstream_http_remote_name;
+auth_request_set $email $upstream_http_remote_email;
+proxy_set_header Remote-User $user;
+proxy_set_header Remote-Groups $groups;
+proxy_set_header Remote-Name $name;
+proxy_set_header Remote-Email $email;
+# If Authelia returns 401, then nginx redirects the user to the login portal.
+# If it returns 200, then the request pass through to the backend.
+# For other type of errors, nginx will handle them as usual.
+error_page 401 =302 https://auth.{{ base_domain }}/?rd=$target_url;

roles/authelia/templates/authelia-endpoint.conf.j2

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+set $upstream_authelia http://authelia:9091/api/verify;
+
+# Virtual endpoint created by nginx to forward auth requests.
+location /authelia {
+    internal;
+    proxy_pass_request_body off;
+    proxy_pass $upstream_authelia;
+    proxy_set_header Content-Length "";
+
+    # Timeout if the real server is dead
+    proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;
+
+    # [REQUIRED] Needed by Authelia to check authorizations of the resource.
+    # Provide either X-Original-URL and X-Forwarded-Proto or
+    # X-Forwarded-Proto, X-Forwarded-Host and X-Forwarded-Uri or both.
+    # Those headers will be used by Authelia to deduce the target url of the user.
+    # Basic Proxy Config
+    client_body_buffer_size 128k;
+    proxy_set_header Host $host;
+    proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-Method $request_method;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header X-Forwarded-Host $http_host;
+    proxy_set_header X-Forwarded-Uri $request_uri;
+    proxy_set_header X-Forwarded-For $remote_addr;
+    proxy_set_header X-Forwarded-Ssl on;
+    proxy_redirect  http://  $scheme://;
+    proxy_http_version 1.1;
+    proxy_set_header Connection "";
+    proxy_cache_bypass $cookie_session;
+    proxy_no_cache $cookie_session;
+    proxy_buffers 4 32k;
+
+    # Advanced Proxy Config
+    send_timeout 5m;
+    proxy_read_timeout 240;
+    proxy_send_timeout 240;
+    proxy_connect_timeout 240;
+}

roles/nginx/templates/snippets/proxy.conf.j2

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+client_body_buffer_size 128k;
+
+#Timeout if the real server is dead
+proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;
+
+# Advanced Proxy Config
+send_timeout 5m;
+proxy_read_timeout 360;
+proxy_send_timeout 360;
+proxy_connect_timeout 360;
+
+# Basic Proxy Config
+proxy_set_header Host $host;
+proxy_set_header X-Real-IP $remote_addr;
+proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+proxy_set_header X-Forwarded-Proto $scheme;
+proxy_set_header X-Forwarded-Host $http_host;
+proxy_set_header X-Forwarded-Uri $request_uri;
+proxy_set_header X-Forwarded-Ssl on;
+proxy_redirect  http://  $scheme://;
+proxy_http_version 1.1;
+proxy_set_header Connection "";
+proxy_cache_bypass $cookie_session;
+proxy_no_cache $cookie_session;
+proxy_buffers 64 256k;
+
+# If behind reverse proxy, forwards the correct IP
+set_real_ip_from 10.0.0.0/8;
+set_real_ip_from 172.16.0.0/12;
+set_real_ip_from 192.168.0.0/16;
+set_real_ip_from fc00::/7;
+real_ip_header X-Forwarded-For;
+real_ip_recursive on;