설치 및 셋팅

CentOS 7 haproxy로 로드밸런스 구성

약올랑 2015. 8. 25. 12:55

ipvsadm으로 로드밸런싱을 하려고 너무 힘들었는데, haproxy는 쉽게 되는 구나.

$ yum install haproxy -y $ vi /etc/haproxy/haproxy.cfg

지정한 port를 다른 서버로 로드밸런싱 해주는 설정

#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
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 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode tcp
log global
# option httplog
option dontlognull
option http-server-close
# option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
frontend forwarding1 *:8001
default_backend backend_servers1
frontend forwarding2 *:8002
default_backend backend_servers2
frontend forwarding3 *:8003
default_backend backend_servers3
frontend forwarding4 *:8004
default_backend backend_servers4
frontend forwarding5 *:8005
default_backend backend_servers5
backend backend_servers1
balance roundrobin
server db01 172.20.30.142:80 check
#server db02 172.20.30.143:8001 check
backend backend_servers2
balance roundrobin
server db01 172.20.30.142:8002 check
server db02 172.20.30.143:8002 check
backend backend_servers3
balance roundrobin
server db01 172.20.30.142:8003 check
server db02 172.20.30.143:8003 check
backend backend_servers4
balance roundrobin
server db01 172.20.30.142:8004 check
server db02 172.20.30.143:8004 check
backend backend_servers5
balance roundrobin
server db01 172.20.30.142:8005 check
server db02 172.20.30.143:8005 check
view raw haproxy.cfg hosted with ❤ by GitHub
# 부팅할때 실행되게 설정해둠. $ systemctl enable haproxy # 실행해보자.성공이면, 다음과 같은 로그를 볼 수 있을거다. $ service haproxy start haproxy.service - HAProxy Load Balancer Loaded: loaded (/usr/lib/systemd/system/haproxy.service; disabled) Active: active (running) since Tue 2015-08-25 12:51:08 KST; 2s ago Main PID: 2103 (haproxy-systemd) CGroup: /system.slice/haproxy.service ├─2103 /usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid ├─2105 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds └─2106 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds # 위와 같은 로그를 볼 수 없다면 오류 로그를 확인해 봐야 한다. $ service haproxy status


다음과 오류가 발생했을 때

[ALERT] 015/013939 (22640) : Starting frontend public: cannot bind socket [0.0.0.0:80] # SELinux 보안 정책과 충돌이 나서 그렇다. # haproxy가 생성한 포트를 모두 허용하도록 설정하면 된다. $ setsebool -P haproxy_connect_any 1