$ apt-cache search haproxy
haproxy - fast and reliable load balancing reverse proxy

sudo apt-get install haproxy
			

启用HAProxy

$ sudo vim /etc/default/haproxy
# Set ENABLED to 1 if you want the init script to start haproxy.
#ENABLED=0
ENABLED=1
# Add extra flags here.
#EXTRAOPTS="-de -m 16"
			

ENABLED=0 改为 ENABLED=1

			
yum install haproxy