keepalived的安装

#官网地址
#https://www.keepalived.org/download.html

#依赖
yum  install openssl-devel gcc -y

wget -O /usr/local/keepalived.tar.gz https://www.keepalived.org/software/keepalived-2.1.5.tar.gz
mkdir -p /usr/local/keepalived
tar -xzvf /usr/local/keepalived.tar.gz -C /usr/local/keepalived --strip-components 1 
cd /usr/local/keepalived/
./configure
make && make install

cp -a /usr/local/etc/keepalived /etc/
cp -a /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
cp -a /usr/local/sbin/keepalived /usr/sbin/

#------------------------------------------------------------------------------------------
#配置keepalived.conf
#------------------------------------------------------------------------------------------

cat >  /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived

global_defs {
   router_id kp1
   vvrp_mcast_group4 224.0.0.18
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 100
    priority 80
    nopreempt
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 11111
    }
    virtual_ipaddress {
        192.168.100.250
    }
}
EOF

#------------------------------------------------------------------------------------------
#加入systemclt
#------------------------------------------------------------------------------------------

cat > /usr/lib/systemd/system/keepalived.service <<EOF
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target

[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived 
ExecReload=/bin/kill -HUP 

[Install]
WantedBy=multi-user.target
EOF

脚本

#官网地址：https://www.keepalived.org/download.html
#注：真的是因为懒才写的脚本
#!/bin/bash
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

i=1
while [ $i == 1 ];do
{
cat <<EOF
请选择主机的角色：
    1）MASTER
    2）BACKUP
EOF

read -p "请输入此主机的类型:(1|2):"  TYPE

case $TYPE in
    1)
        STATE="MASTER"
        ROUTE_ID="1"
        PRIORITH="100"
        ;;
    2)
        read -p "请输入此主机是集群中第几台BACKUP:" backup_number
        STATE="BACKUP"
        ROUTE_ID="$(( 1 + $backup_number ))"
        PRIORITH="$(( 90 - $backup_number ))"
        ;;
    *)
        echo "请输入正确的选项或按Crtl+C终止安装"
        continue
        ;;
esac    

NET_DEV_ALL=`ifconfig | grep "mtu" | awk -F : '{print $1}' | xargs`
NET_DEV_IP=`ifconfig | grep "netmask" | awk '{print $2}' | xargs`
NET_DEV_ALL_NUM=`ifconfig | grep "mtu" | awk -F : '{print $1}' | wc -l`

echo "当前的网卡信息为："

for ((j=1;j<=$NET_DEV_ALL_NUM;j++))
do
    DEV[$j]=`echo "$NET_DEV_ALL" | awk -v t="${j}" '{print $t}'`
    DEVIP[$j]=`echo "$NET_DEV_IP" | awk -v t="${j}" '{print $t}'`   
    echo -e "$j)   ${DEV[$j]} \t ${DEVIP[$j]}"
done

read -p "请输入绑定的网卡全名:"  NET_DEV
read -p "请输入虚拟IP地址:"  NET_IP
echo "--------------------------------------"

cat <<EOF

    主机的类型是：$STATE
    绑定的网卡是：$NET_DEV
    虚拟的IP地址：$NET_IP
    
EOF
echo "--------------------------------------"
read -p '请确认输入是否正确yes/no:' MAKE_SURE

if [ "$MAKE_SURE" == "yes" ];then

#------------------------------------------------------------------------------------------
yum  install openssl-devel gcc -y >/dev/null
wget -q -O /usr/local/keepalived.tar.gz https://www.keepalived.org/software/keepalived-2.1.5.tar.gz
echo "安装中,请稍后..."
mkdir -p /usr/local/keepalived
tar -xzvf /usr/local/keepalived.tar.gz -C /usr/local/keepalived --strip-components 1  >/dev/null
cd /usr/local/keepalived/
./configure
make && make install
 
cp -a /usr/local/etc/keepalived /etc/
cp -a /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
cp -a /usr/local/sbin/keepalived /usr/sbin/
#------------------------------------------------------------------------------------------
#配置keepalived.conf
#------------------------------------------------------------------------------------------
 
cat >  /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
 
global_defs {
   router_id $ROUTE_ID
   vvrp_mcast_group4 224.0.0.18
}
 
vrrp_instance VI_1 {
    state $STATE
    interface $NET_DEV
    virtual_router_id 100
    priority $PRIORITH
    nopreempt
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 11111
    }
    virtual_ipaddress {
        $NET_IP
    }
}
EOF
#------------------------------------------------------------------------------------------
#加入systemclt
#------------------------------------------------------------------------------------------
 
cat > /usr/lib/systemd/system/keepalived.service <<EOF
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target
 
[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived 
ExecReload=/bin/kill -HUP 
 
[Install]
WantedBy=multi-user.target
EOF
#------------------------------------------------------------------------------------------

i=0
else
i=1
fi
}
cat <<EOF
*******************************************
*                                         *
*                安装完成                  *
*                                         *
*             by liu peng fei             *
*                                         *
*******************************************
EOF
rm -f keepalived_install.sh
done