authelia - initial work

confs/site/authelia-auth-request.conf

@@ -0,0 +1,27 @@
+# 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;
+fastcgi_param REMOTE_USER $user;
+fastcgi_param REMOTE_GROUPS $groups;
+fastcgi_param REMOTE_NAME $name;
+fastcgi_param REMOTE_EMAIL $email;
+proxy_set_header Remote-User $user;
+proxy_set_header Remote-Groups $groups;
+proxy_set_header Remote-Name $name;
+proxy_set_header Remote-Email $email;
+# If Authelia returns 401, then nginx redirects the user to the login portal.
+# If it returns 200, then the request pass through to the backend.
+# For other type of errors, nginx will handle them as usual.
+error_page 401 =302 {{ AUTHELIA_BACKEND }}/?rd=$target_url;

confs/site/authelia-proxy.conf

@@ -0,0 +1,40 @@
+set $upstream_authelia {{ AUTHELIA_UPSTREAM }}/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;
+}

confs/site/reverse-proxy.conf

@@ -8,6 +8,9 @@
 location {{ url }} {% raw %}{{% endraw %}
 	etag off;
 	proxy_pass {{ host }};
+	{% if USE_AUTHELIA == "yes" %}
+	include {{ NGINX_PREFIX }}authelia-upstream.conf;
+	{% endif %}
 	include {{ NGINX_PREFIX }}reverse-proxy-headers.conf;
 			{% if ws == "yes" %}
 	proxy_http_version 1.1;

confs/site/server.conf

@@ -164,6 +164,12 @@ server {
 	include {{ NGINX_PREFIX }}proxy-cache.conf;	
 {% endif %}
 
+	# authelia
+{% if USE_AUTHELIA == "yes" %}
+	include {{ NGINX_PREFIX}}authelia-upstream.conf;
+	include {{ NGINX_PREFIX}}authelia-auth-request.conf;
+{% endif %}
+
 	# reverse proxy
 {% if USE_REVERSE_PROXY == "yes" %}
 	include {{ NGINX_PREFIX }}reverse-proxy.conf;