如果使用LVS的DR或者TUN模式结合Keepalived需要在后端真实服务器上特别设置两个arp相关的参数。这里也设置好。
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
4）检查VRRP的设置情况
LB1 Master
state MASTER
interface eth1
virtual_router_id 51
priority 100
LB2 Backup
state BACKUP
interface eth1
virtual_router_id 51
priority 99
Master和Backup的virtual_router_id需要一样，priority需要不一样，数字越大，优先级越高
5）怀疑是编译安装Keepalived版本出现了问题
重新下载并编译2.1.13的版本，并重新启动keepalived，VIP仍然没有被绑定。
线上有个平台的keepalived是通过yum安装的，于是打算先用yum安装keepalived后将配置文件复制过去看看是否可以绑定VIP
rpm -ivh
yum -y install keepalived
cp /data/app_platform/keepalived/conf/keepalived.conf /etc/keepalived/keepalived.conf
重新启动keepalived
然后查看日志
Mar 4 16:42:46 xxxxx Keepalived_healthcheckers[17332]: Registering Kernel netlink reflector
Mar 4 16:42:46 xxxxx Keepalived_healthcheckers[17332]: Registering Kernel netlink command channel
Mar 4 16:42:46 xxxxx Keepalived_vrrp[17333]: Opening file '/etc/keepalived/keepalived.conf'.
Mar 4 16:42:46 xxxxx Keepalived_vrrp[17333]: Configuration is using : 65250 Bytes
Mar 4 16:42:46 xxxxx Keepalived_vrrp[17333]: Using LinkWatch kernel netlink reflector...
Mar 4 16:42:46 xxxxx Keepalived_vrrp[17333]: VRRP sockpool: [ifindex(3), proto(112), unicast(0), fd(10,11)]
Mar 4 16:42:46 xxxxx Keepalived_healthcheckers[17332]: Opening file '/etc/keepalived/keepalived.conf'.
Mar 4 16:42:46 xxxxx Keepalived_healthcheckers[17332]: Configuration is using : 7557 Bytes
Mar 4 16:42:46 xxxxx Keepalived_healthcheckers[17332]: Using LinkWatch kernel netlink reflector...
Mar 4 16:42:46 xxxxx Keepalived_vrrp[17333]: VRRP_Script(chk_haproxy) succeeded
Mar 4 16:42:47 xxxxx Keepalived_vrrp[17333]: VRRP_Instance(VI_1) Transition to MASTER STATE
Mar 4 16:42:48 xxxxx Keepalived_vrrp[17333]: VRRP_Instance(VI_1) Entering MASTER STATE
Mar 4 16:42:48 xxxxx Keepalived_vrrp[17333]: VRRP_Instance(VI_1) setting protocol VIPs.
Mar 4 16:42:48 xxxxx Keepalived_vrrp[17333]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 10.1.1.200
Mar 4 16:42:48 xxxxx Keepalived_healthcheckers[17332]: Netlink reflector reports IP 10.1.1.200 added
Mar 4 16:42:53 xxxxx Keepalived_vrrp[17333]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 10.1.1.200
再查看IP绑定情况
$ ifconfig eth1:vip
eth1:vip Link encap:Ethernet HWaddr 00:16:3E:F2:37:6B
inet addr:10.1.1.200 Bcast:10.1.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:13
再通过yum将keepalived卸载掉
yum remove keepalived
恢复到原来的启动脚本/etc/init.d/keepalived
重新启动keepalived后还是无法绑定VIP
怀疑是keepalived启动脚本/etc/init.d/keepalived的问题
检查/etc/init.d/keepalived
# Source function library.
. /etc/rc.d/init.d/functions
exec="/data/app_platform/keepalived/sbin/keepalived"
prog="keepalived"
config="/data/app_platform/keepalived/conf/keepalived.conf"
[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$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
}
关键是这一行
daemon $exec $KEEPALIVED_OPTIONS
由于没有复制/etc/sysconfig/keepalived,所以将直接执行damon /data/app_platform/keepalived/sbin/keepalived
由于keepalived默认使用的是/etc/keepalived/keepalived.conf作为配置文件，而这里指定了不同的配置文件，所以要修改成为
daemon $exec -D -f $config
重新启动keepalived，查看日志和VIP绑定情况
$ ifconfig eth1:vip
eth1:vip Link encap:Ethernet HWaddr 00:16:3E:F2:37:6B
inet addr:10.1.1.200 Bcast:10.1.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:13
6）将LB2 Backup的keepalived启动脚本也修改一下，观察VIP接管情况
查看LB1 Master