我个人的keepalived-1.4.2实践:安装与测试(1)(★firecat推荐★)

一、下载安装


http://www.keepalived.org/software/keepalived-1.4.2.tar.gz


1、操作系统:CentOS 7.4,先确保安装了openssl,安装方法:


yum -y install openssl-devel


没有OpenSSL的话,configure会报错:


!!! OpenSSL is not properly installed on your system. !!!


 !!! Can not include OpenSSL headers files.  


2、解压编译


tar -zxf keepalived-1.4.2.tar.gz


chmod -R 777 keepalived-1.4.2


cd keepalived-1.4.2

./configure #默认安装

make

make install

会在以下路径生成:


/usr/local/etc/keepalived/keepalived.conf

/usr/local/etc/sysconfig/keepalived


/usr/local/sbin/keepalived


然后我们需要手动做以下事情:


1、mkdir /etc/keepalived #新建文件夹


再把/usr/local/etc/keepalived/keepalived.conf拷贝到/etc/keepalived/keepalived.conf,


cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/


内容修改为:

! Configuration File for keepalived
 
global_defs {
   notification_email { #指定Keepalived在发生事情的时候,发送邮件通知,每行一个地址
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc #指定发件人
   smtp_server 192.168.200.1 #发送email的smtp地址
   smtp_connect_timeout 30 #超时时间
   router_id lb01 #运行Keepalived的机器标识号,主从机必须不同
   ##vrrp_skip_check_adv_addr #注释掉vrrp_strict相关是为了解决虚拟ip,ping不通的问题
   ##vrrp_strict
   ##vrrp_garp_interval 0
   ##vrrp_gna_interval 0
}
 
vrrp_instance VI_1 {
    state MASTER
    interface ens33 #物理网卡名称,主节点和备节点需要相同
    virtual_router_id 100 #唯一的id,主从机必须相同
    priority 150 #优先级,主节点大于备节点,建议至少相差50
    advert_int 1 #通信检查间隔时间1s
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        172.16.6.200 #虚拟ip,会绑定在ens33网卡
    }
}

注意:配置keepalived后发现虚拟ip ping不通的解决办法,vim /etc/keepalived/keepalived.conf。把vrrp_strict相关的语句注释就可以了。




2、在路径/etc/init.d/下新建keepalived.sh脚本,内容如下,重点关注exec和sysconfig的路径要对的上:

#!/bin/sh 
# 
# keepalived   High Availability monitor built upon LVS and VRRP 
# 
# chkconfig:   - 86 14 
# description: Robust keepalive facility to the Linux Virtual Server project \ 
#              with multilayer TCP/IP stack checks. 
   
### BEGIN INIT INFO 
# Provides: keepalived 
# Required-Start: $local_fs $network $named $syslog 
# Required-Stop: $local_fs $network $named $syslog 
# Should-Start: smtpdaemon httpd 
# Should-Stop: smtpdaemon httpd 
# Default-Start:  
# Default-Stop: 0 1 2 3 4 5 6 
# Short-Description: High Availability monitor built upon LVS and VRRP 
# Description:       Robust keepalive facility to the Linux Virtual Server 
#                    project with multilayer TCP/IP stack checks. 
### END INIT INFO 
   
# Source function library. 
. /etc/rc.d/init.d/functions 
 
exec="/usr/local/sbin/keepalived"
prog="keepalived"
config="/etc/keepalived/keepalived.conf"
   
[ -e /usr/local/etc/sysconfig/$prog ] &&  /usr/local/etc/sysconfig/$prog 
 
lockfile=/var/lock/subsys/keepalived 
 
start() { 
    [ -x $exec ] || exit 5 
    [ -e $config ] || exit 6 
    echo -n $"Starting $prog: " 
    daemon $exec $KEEPALIVED_OPTIONS
    retval=$? 
    echo 
    [ $retval -eq 0 ] && touch $lockfile 
    return $retval 
} 
   
stop() { 
    echo -n $"Stopping $prog: " 
    killproc $prog 
    retval=$? 
    echo 
    [ $retval -eq 0 ] && rm -f $lockfile 
    return $retval 
} 
   
restart() { 
    stop 
    start 
} 
   
reload() { 
    echo -n $"Reloading $prog: " 
    killproc $prog -1 
    retval=$? 
    echo 
    return $retval 
} 
   
force_reload() { 
    restart 
} 
   
rh_status() { 
    status $prog 
} 
   
rh_status_q() { 
    rh_status &>/dev/null 
} 
   
   
case "$1" in 
    start) 
        rh_status_q && exit 0 
        $1 
        ;; 
    stop) 
        rh_status_q || exit 0 
        $1 
        ;; 
    restart) 
        $1 
        ;; 
    reload) 
        rh_status_q || exit 7 
        $1 
        ;; 
    force-reload) 
        force_reload 
        ;; 
    status) 
        rh_status 
        ;; 
    condrestart|try-restart) 
        rh_status_q || exit 0 
        restart 
        ;; 
    *) 
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}" 
        exit 2 
esac 
exit $?

二、运行测试


1、获得权限


chmod a+x /etc/init.d/keepalived


chmod a+x /usr/local/etc/sysconfig/keepalived

chmod a+x /usr/local/sbin/keepalived


2、启动


/etc/init.d/keepalived start


或者 service keepalived start


启动后,可以通过以下命令来查看是否安装正确,启动后有3个keepalive进程表示正确:

[root@localhost init.d]# ps -ef|grep keep|grep -v grep

root      20163      1  0 10:03 ?        00:00:00 /usr/local/sbin/keepalived -D

root      20164  20163  0 10:03 ?        00:00:00 /usr/local/sbin/keepalived -D

root      20165  20163  0 10:03 ?        00:00:00 /usr/local/sbin/keepalived -D

[root@localhost ~]# ip add|grep 172.16

   inet 172.16.6.161/24 brd 172.16.6.255 scope global ens33

   inet 172.16.6.200/32 scope global ens33


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