Erro | 记一次yum安装keepalived后启动报错的问题

1. 安装方式 ：yum安装
2. 应用场景 ：keepalived 构建vip
3. 报错场景 ：开始时启动 keepalived 服务无问题，重启服务器后不可用
4. 报错信息 ：

通过 systemctl status keepalived.service 查看

[root@NFS1 ~]# systemctl status keepalived -l
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: failed (Result: resources) since 五 2020-03-13 19:49:57 CST; 59s ago
  Process: 2876 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)

3月 13 19:49:57 NFS1 systemd[1]: Starting LVS and VRRP High Availability Monitor...
3月 13 19:49:57 NFS1 systemd[1]: PID file /var/run/keepalived.pid not readable (yet?) after start.
3月 13 19:49:57 NFS1 systemd[1]: Failed to start LVS and VRRP High Availability Monitor.
3月 13 19:49:57 NFS1 systemd[1]: Unit keepalived.service entered failed state.
3月 13 19:49:57 NFS1 systemd[1]: keepalived.service failed.

通过 journalctl -xe 查看

3月 13 19:57:53 NFS1 polkitd[714]: Registered Authentication Agent for unix-process:3162:61492 (system bu
3月 13 19:57:53 NFS1 systemd[1]: Starting LVS and VRRP High Availability Monitor...
-- Subject: Unit keepalived.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit keepalived.service has begun starting up.
3月 13 19:57:53 NFS1 Keepalived[3169]: Starting Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa3
3月 13 19:57:53 NFS1 Keepalived[3169]: Configuration file '/etc/keepalived/keepalived.conf' is not a regu
3月 13 19:57:53 NFS1 Keepalived[3169]: Stopped Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32
3月 13 19:57:53 NFS1 systemd[1]: PID file /var/run/keepalived.pid not readable (yet?) after start.
3月 13 19:57:53 NFS1 systemd[1]: Failed to start LVS and VRRP High Availability Monitor.
-- Subject: Unit keepalived.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit keepalived.service has failed.
-- 
-- The result is failed.

5. 解决思路：得知是pid文件出错，由于是yum安装，短时间未找到pid配置文件
6. 解决办法：重新安装（两条命令）

 yum remove keepalived
 yum install -y keepalived

7. 注意事项：重新安装后，原 /etc/keepalived/keepalived.conf 被重命名 keepalived.conf.rpmsave ，删除新的 keepalived.conf 文件，将原配置文件改为 keepalived.conf。
8. 启动、查看