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HAProxy杂记（1）

發布時間：2023/12/19 编程问答 27 豆豆
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HAProxy

haproxy基礎

1、安裝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備份配置文件： [root@master1 haproxy]# cp haproxy.cfg{,.back} [root@master1 haproxy]# ls haproxy.cfg haproxy.cfg.back

haproxy演示

實驗環境：1臺haproxy，2臺httpd

1、兩臺網頁服務器安裝httpd

[root@master2 ~]# yum install -y httpd [root@master3 ~]# yum install -y httpd設置首頁，啟動服務： [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，將用戶請求轉發到后端去

[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 ~ 啟動服務： [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]# 訪問：http://10.201.106.131/ 可以在兩個web站點輪流跳轉

3、健康狀態監測測試

3.1 停止一個web節點服務

[root@master2 ~]# systemctl stop httpd現在只能訪問剩下的那個節點了；

4、開啟日志功能

4.1 開啟本地日志服務

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重啟日志服務： [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 ~]# 查看是否監聽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 高級配置

修改haproxy調度算法為source

vim haproxy.cfg #--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend websrvsbalance source重載服務： [root@master1 haproxy]# systemctl reload haproxy.service訪問測試后：只在一個web上面停留了，不會跳轉至另一個web；

修改為uri算法

[root@master1 haproxy]# vim haproxy.cfg#--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend websrvsbalance urihash-type consistent重載服務： [root@master1 haproxy]# systemctl reload haproxy.service生成10個測試頁面： [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訪問測試：http://10.201.106.131/test2.html 只固定在一個web服務器上；[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調度算法

#--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend websrvsbalance hdr(User-Agent)hash-type consistent通過curl模擬別的瀏覽器訪問： [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

設置監聽多個端口

#--------------------------------------------------------------------- # main frontend which proxys to the backends #--------------------------------------------------------------------- frontend mainbind *:80 bind *:8080default_backend websrvs重啟服務： [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]#

修改權重測試

[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測試訪問網頁結果是，訪問3次web2，才訪問一次web1；

轉載于:https://blog.51cto.com/zhongle21/2087359

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