add haproxy

haproxy/README.md

@@ -0,0 +1,58 @@
+haproxy
+=======
+
+![](https://badge.imagelayers.io/library/haproxy:alpine.svg)
+
+[HAProxy][1] is a free, open source high availability solution, providing load
+balancing and proxying for TCP and HTTP-based applications by spreading
+requests across multiple servers.
+
+## docker-compose.yml
+
+```yaml
+haproxy:
+  image: haproxy:alpine
+  volumes:
+    - ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg
+  net: host
+  restart: always
+```
+
+## haproxy.cfg
+
+This sample config shows you how to setup a simple tcp load balancer.
+
+```
+#                       +- jp (:1081)
+#                       |
+#                       |- tw (:1082)
+# frontend --- backend -+  
+# (*:1080)              |- hk (:1083)
+#                       |
+#                       +- us (:1084)
+
+global
+        # daemon # WARNING: DO NOT USE IT!
+        maxconn 4000
+
+defaults
+        mode tcp
+        timeout connect 5000ms
+        timeout client 50000ms
+        timeout server 50000ms
+
+frontend front
+        bind *:1080
+        default_backend back
+
+backend back
+        balance roundrobin
+        server jp 127.0.0.1:1081 weight 50
+        server tw 127.0.0.1:1082 weight 20
+        server hk 127.0.0.1:1083 weight 15
+        server us 127.0.0.1:1084 weight 15
+```
+
+> :warning: haproxy must not be daemonized!
+
+[1]: http://www.haproxy.org/