Scaling (#109)

Make PWD scalable

haproxy/haproxy.cfg

@@ -0,0 +1,32 @@
+defaults
+    mode http
+    timeout connect 5000ms
+    timeout client 50000ms
+    timeout server 50000ms
+
+frontend http-in
+    bind *:8080
+
+    acl host_localhost hdr(host) localhost
+    acl host_pwd1 hdr_reg(host) -i ^.*\.?host1\.localhost$
+    acl host_pwd2 hdr_reg(host) -i ^.*\.?host2\.localhost$
+
+    use_backend all if host_localhost
+    use_backend pwd1 if host_pwd1
+    use_backend pwd2 if host_pwd2
+
+backend all
+    balance roundrobin
+
+    option httpchk GET /ping HTTP/1.0
+    http-check expect rstatus 200
+    default-server inter 3s fall 3 rise 2
+
+    server node1 pwd1:3000 check
+    server node2 pwd2:3000 check
+
+backend pwd1
+    server node1 pwd1:3000
+
+backend pwd2
+    server node2 pwd2:3000