我個人的keepalived-1.4.2實踐：安裝與測試（1）（★firecat推薦★）

一、下載下傳安裝 http://www.keepalived.org/software/keepalived-1.4.2.tar.gz

1、作業系統：CentOS 7.4，先確定安裝了openssl，安裝方法：

yum -y install openssl-devel

沒有OpenSSL的話，configure會報錯：

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

 !!! Can not include OpenSSL headers files.  

2、解壓編譯

tar -zxf keepalived-1.4.2.tar.gz

chmod -R 777 keepalived-1.4.2

cd keepalived-1.4.2

./configure #預設安裝

make

make install

會在以下路徑生成：

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

/usr/local/etc/sysconfig/keepalived

/usr/local/sbin/keepalived

然後我們需要手動做以下事情：

1、mkdir /etc/keepalived #建立檔案夾

再把/usr/local/etc/keepalived/keepalived.conf拷貝到/etc/keepalived/keepalived.conf，

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

内容修改為：

! Configuration File for keepalived
 
global_defs {
   notification_email { #指定Keepalived在發生事情的時候，發送郵件通知，每行一個位址
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected] #指定發件人
   smtp_server 192.168.200.1 #發送email的smtp位址
   smtp_connect_timeout 30 #逾時時間
   router_id lb01 #運作Keepalived的機器辨別号，主從機必須不同
   ##vrrp_skip_check_adv_addr #注釋掉vrrp_strict相關是為了解決虛拟ip,ping不通的問題
   ##vrrp_strict
   ##vrrp_garp_interval 0
   ##vrrp_gna_interval 0
}
 
vrrp_instance VI_1 {
    state MASTER
    interface ens33 #實體網卡名稱,主節點和備節點需要相同
    virtual_router_id 100 #唯一的id，主從機必須相同
    priority 150 #優先級，主節點大于備節點，建議至少相差50
    advert_int 1 #通信檢查間隔時間1s
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        172.16.6.200 #虛拟ip,會綁定在ens33網卡
    }
}

      

注意：配置keepalived後發現虛拟ip ping不通的解決辦法，vim /etc/keepalived/keepalived.conf。把vrrp_strict相關的語句注釋就可以了。

2、在路徑/etc/init.d/下建立keepalived.sh腳本，内容如下，重點關注exec和sysconfig的路徑要對的上：

#!/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、運作測試

1、獲得權限

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

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

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

2、啟動

/etc/init.d/keepalived start

或者 service keepalived start

啟動後，可以通過以下指令來檢視是否安裝正确，啟動後有3個keepalive程序表示正确：

[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