Update docker-compose: Multiple squid proxy instances running on the same host, with load balacing, web & dns filtering (dnsmasq/e2guardian)

docker-compose/haproxy/haproxy.cfg

@@ -0,0 +1,58 @@
+global
+    # to have these messages end up in /var/log/haproxy.log you will
+    # need to:
+    #
+    # 1) configure syslog to accept network log events.  This is done
+    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
+    #    /etc/sysconfig/syslog
+    #
+    # 2) configure local2 events to go to the /var/log/haproxy.log
+    #   file. A line like the following can be added to
+    #   /etc/sysconfig/syslog
+    #
+    #    local2.*                       /var/log/haproxy.log
+    #
+    log         127.0.0.1 local0 notice 
+    user        haproxy
+    group       haproxy
+    # turn on stats unix socket
+    stats socket /var/lib/haproxy/stats
+
+defaults
+    log 	global
+    retries                 3
+    timeout queue           1m
+# First cnx
+    timeout connect         10s
+# Activity cnx
+    timeout client          2m
+    timeout server          2m
+    option                  abortonclose
+
+frontend stats
+    maxconn                 500
+    mode                    http
+    option                  httplog
+    bind *:80
+    stats enable
+    stats hide-version
+    stats uri /stats
+
+# main frontend which proxys to the backends
+#---------------------------------------------------------------------
+frontend proxy 
+    bind *:3128
+    default_backend squid 
+
+#---------------------------------------------------------------------
+# round robin balancing between the various backends
+#---------------------------------------------------------------------
+backend squid
+    balance    leastconn 
+    mode http
+    option httpclose 
+    option forwardfor 
+    server  s1 squid1:3128 check
+    server  s2 squid2:3128 check
+    server  s3 squid3:3128 check
+    server  s4 squid4:3128 check