CentOS 安装 Keepalive 实现节点高可用
2019-07-14 本文已影响0人
Danielme
假设现在需要在2台 Centos 服务器（192.168.1.101，192.168.1.102）上安装Keepalive，实现高可用（VIP 192.168.1.201）。
- 安装 keepalived
yum install -y keepalived - 修改主节点 keepalived 配置
cat <<EOF > /etc/keepalived/keepalived.conf global_defs { router_id MASTER01 #实例ID，唯一 } vrrp_instance VI_1 { state MASTER #设置主备状态 interface enp0s3 #绑定网卡 virtual_router_id 129 #分组ID(0-255)，主备必须相同 priority 100 #优先级，主节点值更高 advert_int 1 #VRRP Multicast广播周期秒数 authentication { #认证方式 auth_type PASS auth_pass 123456 } virtual_ipaddress { #VIP设置 192.168.1.244 } } EOF - 修改备节点 keepalived 配置
cat <<EOF > /etc/keepalived/keepalived.conf global_defs { router_id MASTER02 #实例ID，唯一 } vrrp_instance VI_1 { state BACKUP #设置主备状态 interface enp0s3 #绑定网卡 virtual_router_id 129 #分组ID(0-255)，主备必须相同 priority 98 #优先级，备节点值更低 advert_int 1 #VRRP Multicast广播周期秒数 authentication { #认证方式 auth_type PASS auth_pass 123456 } virtual_ipaddress { #VIP设置 192.168.1.244 } } EOF - 注册 keepalived 服务
systemctl enable keepalived systemctl restart keepalived - 使用ping VIP方式测试，期间可以重启主节点，可以看到ping不会报错，在不到1毫秒内完成切换
ping 192.168.1.244 PING 192.168.1.244 (192.168.1.244) 56(84) bytes of data. 64 bytes from 192.168.1.244: icmp_seq=13 ttl=64 time=0.061 ms 64 bytes from 192.168.1.244: icmp_seq=14 ttl=64 time=0.063 ms 64 bytes from 192.168.1.244: icmp_seq=15 ttl=64 time=0.061 ms 64 bytes from 192.168.1.244: icmp_seq=16 ttl=64 time=0.070 ms 64 bytes from 192.168.1.244: icmp_seq=17 ttl=64 time=0.130 ms 64 bytes from 192.168.1.244: icmp_seq=18 ttl=64 time=0.115 ms 64 bytes from 192.168.1.244: icmp_seq=19 ttl=64 time=0.065 ms 64 bytes from 192.168.1.244: icmp_seq=20 ttl=64 time=0.110 ms 64 bytes from 192.168.1.244: icmp_seq=21 ttl=64 time=0.057 ms 64 bytes from 192.168.1.244: icmp_seq=22 ttl=64 time=0.089 ms
