Added Varnish as a cache server to improve response times for heavy l…

…oads

docker-compose.yml

@@ -57,6 +57,22 @@ services:
         ports:
             - "8080:80"
 
+    # https://hub.docker.com/_/varnish
+    varnish:
+        image: varnish:alpine
+        depends_on:
+            - php
+        volumes:
+            - ./docker/default.vcl:/etc/varnish/default.vcl:ro
+        environment:
+            VARNISH_SIZE: 128m
+        healthcheck:
+            test: wget -O - http://localhost
+            retries: 3
+            timeout: 5s
+        ports:
+            - "8081:80"
+
     # https://github.com/FlorianLeChat/Source-Web-Console
     php:
         image: source-web-console

docker/default.vcl

@@ -0,0 +1,62 @@
+vcl 4.1;
+
+backend default {
+	.host = "php";
+	.port = "9000";
+}
+
+sub vcl_recv {
+	set req.backend_hint = vdir.backend();
+
+	if (req.http.Cookie) {
+		set req.http.Cookie = ";" + req.http.Cookie;
+		set req.http.Cookie = regsuball(req.http.Cookie, "; +", ";");
+		set req.http.Cookie = regsuball(req.http.Cookie, ";(PHPSESSID)=", "; \1=");
+		set req.http.Cookie = regsuball(req.http.Cookie, ";[^ ][^;]*", "");
+		set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", "");
+
+		if (req.http.Cookie == "") {
+			unset req.http.Cookie;
+		}
+	}
+
+	if (req.method != "GET" &&
+		req.method != "HEAD" &&
+		req.method != "PUT" &&
+		req.method != "POST" &&
+		req.method != "TRACE" &&
+		req.method != "OPTIONS" &&
+		req.method != "DELETE"
+	) {
+		return (pipe);
+	}
+
+	if (req.http.Authorization) {
+		return (pass);
+	}
+
+	if (req.method != "GET" && req.method != "HEAD") {
+		return (pass);
+	}
+}
+
+sub vcl_backend_response {
+	if (beresp.status >= 400 && beresp.status < 600) {
+		set beresp.uncacheable = true;
+		return (deliver);
+	}
+
+	set beresp.ttl = 5m;
+
+	return (deliver);
+}
+
+sub vcl_deliver {
+	if (obj.hits > 0) {
+		set resp.http.X-Cache = "HIT";
+	} else {
+		set resp.http.X-Cache = "MISS";
+	}
+
+	set resp.http.X-Cache-Hits = obj.hits;
+}