Keepalived

ゝ一世哀愁。 2022-05-31 03:25 231阅读 0赞

1.安装keepalived(**ubuntu server**)

首先安装依赖：

安装libssl-dev(sudo apt-get install libssl-dev)；

libpopt-dev(sudo apt-get install libpopt-dev)；

libnl libnl-devel(sudo apt-get install libnl libnl-devel)(IPV6)；

libnfnetlink-devel(sudo apt-get install libnfnetlink-devel)(IPV6)；

下载keepalived-1.3.6.tar.gz安装包

并解压与~/keepalived-1.3.6/

编译：./configure --prefix=/usr/local/keepalived

make && make install

2.keepalived配置

复制需要的文件

sudo cp ~/keepalived-1.3.6/keepalived/etc/init.d/keepalived /etc/init.d/keepalived

sudo cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

sudo cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig(/etc/sysconfig不存在，需提前创建)

sudo mkdir /etc/keepalived/

sudo cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf(配置信息可参照如下)

Master配置：

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1.  ! Configuration File for keepalived  
2.    
3.  global\_defs \{  
4.     notification\_email \{  
5.       localhost@sample.com  
6.     \}  
7.     notification\_email\_from notify@sample.com  
8.     smtp\_server smtp@sample.com  
9.     smtp\_connect\_timeout 30  
10.    router\_id LVS\_59  
11. \}  
12.   
13. vrrp\_script chk\_haproxy \{  
14.    script "/usr/local/keepalived/shell/chk\_haproxy.sh"    \#服务探测，返回0说明服务是正常的  
15.    interval 3                     \#每隔3秒探测一次  
16.    weight 5                       \#haproxy上线，权重加5；下线，权重减5  
17.    fall 2  
18.    rise 2  
19. \}  
20.   
21. vrrp\_instance mysql\_1 \{  
22.     state MASTER  
23.     interface eth0  
24.     virtual\_router\_id 50  
25.     garp\_master\_delay 1  
26.     priority 120  
27.     advert\_int 1  
28.     authentication \{  
29.         auth\_type PASS  
30.         auth\_pass password1  
31.     \}  
32.     virtual\_ipaddress \{  
33.         192.168.56.101  
34.     \}  
35.     track\_interface \{  
36.         eth0  
37.     \}  
38.     track\_script \{  
39.         chk\_haproxy  
40.     \}  
41. \}

Slave配置：

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1. ! Configuration File for keepalived  
2.   
3. global\_defs \{  
4.    notification\_email \{  
5.      localhost@sample.com  
6.    \}  
7.    notification\_email\_from notify@sample.com  
8.    smtp\_server smtp@sample.com  
9.    smtp\_connect\_timeout 30  
10.    router\_id LVS\_59  
11. \}  
12.   
13. vrrp\_script chk\_haproxy \{  
14.    script "/usr/local/keepalived/shell/chk\_haproxy.sh"    \#服务探测，返回0说明服务是正常的  
15.    interval 3                     \#每隔3秒探测一次  
16.    weight 5                       \#haproxy上线，权重加5；下线，权重减5  
17.    fall 2  
18.    rise 2  
19. \}  
20.   
21. vrrp\_instance mysql\_1 \{  
22.     <span style="color:\#FF0000;">state BACKUP  
23.     interface eth0  
24.     virtual\_router\_id 50  
25.     garp\_master\_delay 1  
26.     <span style="color:\#FF0000;">priority 100  
27.     advert\_int 1  
28.     authentication \{  
29.         auth\_type PASS  
30.         auth\_pass password1  
31.     \}  
32.     virtual\_ipaddress \{  
33.         192.168.56.101  
34.     \}  
35.     track\_interface \{  
36.         eth0  
37.     \}  
38.     track\_script \{  
39.         chk\_haproxy  
40.     \}  
41. \}

检测脚本chk\_haproxy.sh：

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1.  \#!/bin/bash  
2.    
3.  \# 定时查看haproxy是否存在，如果不存在则启动haproxy，  
4.  \# 如果启动失败，则停止keepalived  
5.  echo "\[Keepalived\]Check HAProxy Running..."  
6.    
7.  beforeStatus=$(ps aux|grep haproxy | grep -v grep | grep -v chk\_haproxy.sh | grep -v bash | wc -l)  
8.  if \[ $beforeStatus -le 0 \]; then  
9.     echo "\[Keepalived\]Startup HAProxy Service"  
10.    sudo sh /usr/local/haproxy/startup.sh  
11.    sleep 2  
12.    afterStatus=$(ps aux|grep haproxy | grep -v grep | grep -v bash |wc -l)  
13.    echo "After:$afterStatus"  
14.    if \[ $afterStatus -le 0  \]; then  
15.       echo "\[Keepalived\]Shutdown Keepalived Service"  
16.       sudo sh /usr/local/keepalived/shutdown.sh  
17.    fi  
18. fi  
19.   
20. echo "\[Keepalived\]Check HAProxy Running Done."

curl -I -s --connect-timeout $timeout http://localhost:8080 -w %\{http\_code\} | tail -n1

添加软连接：首先创建/etc/rc.d/init.d/目录

sudo ln -s /lib/lsb/init-functions /etc/rc.d/init.d/functions

3.启动keepalived

/etc/init.d/keepalived start|restart|stop

启动时需要输入当前用户密码

4.查看keepalived是否已启动

ps aux|grep keepalived

查看keepalived设置IP：ip a

5.配置keepalived日志

在/etc/sysconfig/keepalived文件中修改KEEPALIVED-OPTIONS="-D"，修改为：KEEPALIVED-OPTIONS="-D -d -S 0"

在/etc/rsyslog.conf文件中添加：

\#keepalived

local0.\* /var/log/keepalived.log

在/etc/rsyslog.d/中添加48-keepalived.conf文件(sudo cp 50-default.conf 48-keepalived.conf)

删除原内容并添加如下内容：

local0.\*     /var/log/keepalived.log

表示local0设备的日志信息记录于/var/log/keepalived.log里

然后重启rsyslog服务：sudo service rsyslog restart

6.启动停止脚本

启动：

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1.  \#!/bin/sh   
2.    
3.  HOME=/usr/local/keepalived/  
4.  DAEMON=/etc/init.d/keepalived  
5.  DAEMON\_ARGS="start -f /etc/keepalived/keepalived.conf -d -D -S 0"  
6.  DESC="Keepalived Daemon"  
7.    
8.  echo "Starting $DESC, and use conf $DAEMON\_ARGS"  
9.    
10. $DAEMON $DAEMON\_ARGS

停止：

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1.  \#!/bin/sh   
2.    
3.  HOME=/usr/local/keepalived/  
4.  DAEMON=/etc/init.d/keepalived  
5.  DAEMON\_ARGS=" stop -f /etc/keepalived/keepalived.conf -d -D -S 0"  
6.  DESC="Keepalived Daemon"  
7.    
8.  echo "Stopping $DESC, and use conf $DAEMON\_ARGS"  
9.    
10. $DAEMON$DAEMON\_ARGS

**问题**

问题1：Keepalived执行chk\_haproxy.sh检测脚本时出现exited due to signal 15

解决1：vrrp\_script\{\}中的interval时间需大于脚本中的sleep时间

[view plain]: http://blog.csdn.net/user_rcy/article/details/77931451#