centos7中keeplived代碼隨記（虛擬機做的真的坑，多練吧）
節點1 192.168.100.110
節點2 192.168.100.120
-------------------------DR調度服務器------------------------------
yum install keepalived ipvsadm -y
關閉防火墻安全組件
vi /etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.ens33.send_redirects = 0
cp ifcfg-ens33 ifcfg-ens33:0
DEVICE=ens33:0
ONBOOT=yes
IPADDR=192.168.100.10
NETMASK=255.255.255.0
ifup ens33:0
————————————————————————————————
設置ipvsadm啟動腳本
cd /etc/init.d/
vi dr.sh
#!/bin/bash
GW=192.168.100.1
VIP=192.168.100.10
RIP1=192.168.100.110
RIP2=192.168.100.120
start)
/sbin/ipvsadm --save > /etc/sysconfig/ipvsadm
systemctl start ipvsadm
/sbin/ifconfig ens33:0 $VIP broadcast $VIP netmask 255.255.255.255 broadcast
$VIP up
/sbin/route add -host $VIP dev ens33:0
/sbin/ipvsadm -A -t $VIP:80 -s rr
/sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g
/sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g
;;
stop)
/sbin/ipvsadm -C
systemctl stop ipvsadm
ifconfig ens33:0 down
route del $VIP
echo "ipvsamd stoped----------------------[ok]"
;;
status)
if [ ! -e /var/lock/subsys/ipvsadm ];then
echo "ipvsadm stoped---------------"
exit 1
else
echo "ipvsamd Runing ---------[ok]"
fi
;;
*)
echo "Usage: $0 {start|stop|status}"
exit 1
esac
exit 0
chmod +x dr.sh
service dr.sh start
-----------------------節點服務器------------------------------------------
yum install httpd
systemctl start httpd.service
systemctl stop firewalld.service
setenforce 0
cd /var/www/html/
echo "this is accp web" > index.html
cd /etc/sysconfig/network-scripts
cp ifcfg-lo ifcfg-lo:0
vim ifcfg-lo:0
DEVICE=lo:0
IPADDR=192.168.100.10
NETMASK=255.255.255.0
ONBOOT=yes
設置ifcfg-lo:0 啟動腳本
cd /etc/init.d/
vim web.sh
#!/bin/bash
VIP=192.168.100.10
case "$1" in
start)
ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP
/sbin/route add -host $VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK "
;;
stop)
ifconfig lo:0 down
route del $VIP /dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stopd"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
chmod +x web.sh
service web.sh start
ifup lo:0 (啟用立刻中斷）
firefox "http://127.0.0.1/" & 本地自測網頁
service web.sh stop
service web.sh start(建議重啟服務)
-------------keepalived部署--（在調度服務器上設置）-------------------------
cd /etc/keepalived/
vim keepalived.conf
global_defs {
...
smtp_server 127.0.0.1 #指向本地
router_id LVS_01 #指定名稱,備份服務器不同名稱
...
}
vrrp_instance VI_1 {
state MASTER #備份服務器是BACKUP
virtual_router_id 10 #組號相同
...
auth_pass abc123 #驗證密碼
priority 100 #優先級備份小於主
...
virtual_ipaddress {
192.168.100.10
}
...
virtual_server 192.168.100.10 80 {
...
real_server 192.168.100.201 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.100.203 80 {
weight 1
TCP_CHECK {
connect_port 80 #添加端口
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
systemctl start keepalived
ip addr show dev ens33:0 #查看虛擬網卡
keepalived啟動不到10秒就黑，可能是綁定eth0的問題 會報錯 keepalived綁定ens33
keepalived狀態常在的時候訪問不了，重啟防火墻又好了，很無語。
能訪問之後設置的輪詢機制又不啟用 開啟很多網頁才OK，不明所以
centos7中keeplived代碼隨記（虛擬機做的真的坑，多練吧）