HAProxy杂记(1)
HAProxy
haproxy基础
1、安装haproxy
[root@master1 ~]# yum -y install haproxy
[root@master2 ~]# yum -y install haproxy查看haproxy生成的文件 :
[root@master1 ~]# rpm -ql haproxy备份配置文件:
[root@master1 haproxy]# cp haproxy.cfg{,.back}
[root@master1 haproxy]# ls
haproxy.cfg haproxy.cfg.back
haproxy演示
实验环境:1台haproxy,2台httpd
1、两台网页服务器安装httpd
[root@master2 ~]# yum install -y httpd
[root@master3 ~]# yum install -y httpd设置首页,启动服务:
[root@master2 ~]# echo "<h1>Web1</h1>" > /var/www/html/index.html
[root@master2 ~]# systemctl start httpd.service
[root@master2 ~]#[root@master3 ~]# echo "<h1>Web2</h1>" > /var/www/html/index.html
[root@master3 ~]# systemctl start httpd.service
[root@master3 ~]#
2、配置haproxy文件,将用户请求转发到后端去
[root@master1 haproxy]# vim haproxy.cfg#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend main *:80default_backend websrvs#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend websrvsbalance roundrobinserver web1 10.201.106.132:80 checkserver web2 10.201.106.133:80 check
~ 启动服务:
[root@master1 haproxy]# systemctl start haproxy.service
[root@master1 haproxy]# systemctl status haproxy.service
● haproxy.service - HAProxy Load BalancerLoaded: loaded (/usr/lib/systemd/system/haproxy.service; disabled; vendor preset: disabled)Active: active (running) since Sun 2017-01-15 22:30:40 CST; 5s agoMain PID: 4924 (haproxy-systemd)CGroup: /system.slice/haproxy.service├─4924 /usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid├─4925 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds└─4926 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -DsJan 15 22:30:40 master1.com systemd[1]: Started HAProxy Load Balancer.
Jan 15 22:30:40 master1.com systemd[1]: Starting HAProxy Load Balancer...
Jan 15 22:30:40 master1.com haproxy-systemd-wrapper[4924]: haproxy-systemd-wrapper: executing /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -Ds
[root@master1 haproxy]# 访问:http://10.201.106.131/
可以在两个web站点轮流跳转
3、健康状态监测测试
3.1 停止一个web节点服务
[root@master2 ~]# systemctl stop httpd现在只能访问剩下的那个节点了;
4、开启日志功能
4.1 开启本地日志服务
配置日志文件:
[root@master1 ~]# vim /etc/rsyslog.conf # Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514# Save boot messages also to boot.loglocal2.* /var/log/haproxy.log重启日志服务:
[root@master1 ~]# systemctl restart rsyslog.service
[root@master1 ~]# systemctl status rsyslog.service
● rsyslog.service - System Logging ServiceLoaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)Active: active (running) since Sun 2017-01-15 22:47:46 CST; 13s agoMain PID: 5073 (rsyslogd)CGroup: /system.slice/rsyslog.service└─5073 /usr/sbin/rsyslogd -nJan 15 22:47:46 master1.com systemd[1]: Starting System Logging Service...
Jan 15 22:47:46 master1.com systemd[1]: Started System Logging Service.
[root@master1 ~]# 查看是否监听UDP 514端口:
[root@master1 ~]# ss -unlp
State Recv-Q Send-Q Local Address:Port Peer Address:Port
UNCONN 0 0 *:40858 *:* users:(("haproxy",pid=4926,fd=6),("haproxy",pid=4925,fd=6))
UNCONN 0 0 *:514 *:* users:(("rsyslogd",pid=5104,fd=3))
UNCONN 0 0 :::514 :::* users:(("rsyslogd",pid=5104,fd=4))
[root@master1 ~]#
4.2 查看haproxy日志
[root@master1 ~]# tail /var/log/haproxy.log Feb 5 23:21:29 localhost haproxy[4926]: Server websrvs/web1 is UP, reason: Layer4 check passed, check duration: 0ms. 2 active and 0 backup servers online. 0 sessions requeued, 0 total in queue.
Feb 5 23:21:31 localhost haproxy[4926]: 10.201.106.1:56402 [05/Feb/2017:23:21:31.495] main websrvs/web2 5/0/9/2/16 304 141 - - ---- 1/1/0/1/0 0/0 "GET / HTTP/1.1"
Feb 5 23:21:32 localhost haproxy[4926]: 10.201.106.1:56402 [05/Feb/2017:23:21:31.512] main websrvs/web1 727/0/1/4/732 200 273 - - ---- 1/1/0/0/0 0/0 "GET / HTTP/1.1"
Feb 5 23:21:32 localhost haproxy[4926]: 10.201.106.1:56402 [05/Feb/2017:23:21:32.243] main websrvs/web2 738/0/3/6/747 200 273 - - ---- 1/1/0/0/0 0/0 "GET / HTTP/1.1"
Feb 5 23:21:33 localhost haproxy[4926]: 10.201.106.1:56402 [05/Feb/2017:23:21:32.989] main websrvs/web1 572/0/1/2/575 200 273 - - ---- 1/1/0/1/0 0/0 "GET / HTTP/1.1"
[root@master1 ~]#
haproxy 高级配置
修改haproxy调度算法为source
vim haproxy.cfg
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend websrvsbalance source重载服务:
[root@master1 haproxy]# systemctl reload haproxy.service访问测试后:只在一个web上面停留了,不会跳转至另一个web;
修改为uri算法
[root@master1 haproxy]# vim haproxy.cfg#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend websrvsbalance urihash-type consistent重载服务:
[root@master1 haproxy]# systemctl reload haproxy.service生成10个测试页面:
[root@master2 ~]# for i in {1..10};do echo "<h1>Page $i on Web1</h1>" > /var/www/html/test$i.html;done[root@master3 ~]# for i in {1..10};do echo "<h1>Page $i on Web2</h1>" > /var/www/html/test$i.html;done
[root@master3 ~]#
[root@master3 ~]# ls /var/www/html/
index.html test1.html test3.html test5.html test7.html test9.html
test10.html test2.html test4.html test6.html test8.html访问测试:http://10.201.106.131/test2.html
只固定在一个web服务器上;[root@master3 ~]# curl http://10.201.106.131/test2.html
<h1>Page 2 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test2.html
<h1>Page 2 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test2.html
<h1>Page 2 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test2.html
<h1>Page 2 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test2.html
<h1>Page 2 on Web1</h1>
[root@master3 ~]#
[root@master3 ~]# curl http://10.201.106.131/test5.html
<h1>Page 5 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test5.html
<h1>Page 5 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test5.html
<h1>Page 5 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test6.html
<h1>Page 6 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test6.html
<h1>Page 6 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test6.html
<h1>Page 6 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test8.html
<h1>Page 8 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test8.html
<h1>Page 8 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test9.html
<h1>Page 9 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test9.html
<h1>Page 9 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test3.html
<h1>Page 3 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test3.html
<h1>Page 3 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]# curl http://10.201.106.131/test8.html
<h1>Page 8 on Web1</h1>
[root@master3 ~]# curl http://10.201.106.131/test8.html
<h1>Page 8 on Web1</h1>
[root@master3 ~]#
hdr调度算法
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend websrvsbalance hdr(User-Agent)hash-type consistent通过curl模拟别的浏览器访问:
[root@master3 ~]# curl -A 'hello' http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]#
[root@master3 ~]# curl -A 'IE' http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]# curl -A 'IE' http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]# curl -A '360' http://10.201.106.131/test4.html
<h1>Page 4 on Web2</h1>
[root@master3 ~]# curl -A '360' http://10.201.106.131/test4.html
设置监听多个端口
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend mainbind *:80 bind *:8080default_backend websrvs重启服务:
[root@master1 haproxy]# systemctl restart haproxy.service
[root@master1 haproxy]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:8080 *:*
LISTEN 0 128 *:80 *:*
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
[root@master1 haproxy]#
修改权重测试
[root@master1 haproxy]# vim haproxy.cfg#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend websrvsbalance roundrobinserver web1 10.201.106.132:80 check weight 1server web2 10.201.106.133:80 check weight 3[root@master1 haproxy]# systemctl reload haproxy.service测试访问网页结果是,访问3次web2,才访问一次web1;
转载于:https://blog.51cto.com/zhongle21/2087359
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