HAProxy雜記（1）
阿新 • • 發佈：2018-03-15
HAProxy 基礎 雜記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.backhaproxy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，將用戶請求轉發到後端去
[root@master1 haproxy]# vim haproxy.cfg #--------------------------------------------------------------------- # main frontend which proxys to the backends #--------------------------------------------------------------------- frontend main *:80 default_backend websrvs #--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend websrvs balance roundrobin server web1 10.201.106.132:80 check server 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 Balancer Loaded: loaded (/usr/lib/systemd/system/haproxy.service; disabled; vendor preset: disabled) Active: active (running) since Sun 2017-01-15 22:30:40 CST; 5s ago Main 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 -Ds Jan 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、開啟日誌功能
4.1 開啟本地日誌服務
配置日誌文件：
[root@master1 ~]# vim /etc/rsyslog.conf
# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514
# Save boot messages also to boot.log
local2.* /var/log/haproxy.log
重啟日誌服務：
[root@master1 ~]# systemctl restart rsyslog.service
[root@master1 ~]# systemctl status rsyslog.service
● rsyslog.service - System Logging Service
Loaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2017-01-15 22:47:46 CST; 13s ago
Main PID: 5073 (rsyslogd)
CGroup: /system.slice/rsyslog.service
└─5073 /usr/sbin/rsyslogd -n
Jan 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日誌
[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 websrvs
balance source
重載服務：
[root@master1 haproxy]# systemctl reload haproxy.service
訪問測試後：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 websrvs
balance uri
hash-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 websrvs
balance 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 main
bind *:80
bind *:8080
default_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 websrvs
balance roundrobin
server web1 10.201.106.132:80 check weight 1
server 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；HAProxy雜記（1）