Cas-tools安装成功，但是qemu-ga启动失败了

CentOS Linux release 7.0.1406 (Core)

[root@localhost ~]# systemctl status qemu-ga

qemu-ga.service - LSB: daemon for QEMU Guest Agent

   Loaded: loaded (/etc/rc.d/init.d/qemu-ga)

   Active: failed (Result: resources) since Wed 2023-02-08 14:40:42 CST; 38min ago

  Process: 3153 ExecStart=/etc/rc.d/init.d/qemu-ga start (code=exited, status=0/SUCCESS)

Feb 08 14:40:41 localhost.localdomain systemd[1]: Starting LSB: daemon for QEMU Guest Agent...

Feb 08 14:40:41 localhost.localdomain qemu-ga[3153]: Starting qemu-ga daemon: [  OK  ]

Feb 08 14:40:42 localhost.localdomain systemd[1]: PID file /var/run/qemu-ga.pid not readable (yet?) after start.

Feb 08 14:40:42 localhost.localdomain systemd[1]: Failed to start LSB: daemon for QEMU Guest Agent.

Feb 08 14:40:42 localhost.localdomain systemd[1]: Unit qemu-ga.service entered failed state.

[root@localhost ~]# systemctl status qemu-guest-agent

qemu-guest-agent.service - QEMU Guest Agent

   Loaded: loaded (/usr/lib/systemd/system/qemu-guest-agent.service; static)

   Active: active (running) since Wed 2023-02-08 14:36:53 CST; 42min ago

 Main PID: 1297 (qemu-ga)

   CGroup: /system.slice/qemu-guest-agent.service

           1297 /usr/bin/qemu-ga --method=virtio-serial --path=/dev/virtio-ports/org.qemu.guest_agent.0 --blacklist=guest-file-open guest-file-close guest-file-read guest-file-write guest-file-seek guest-file-flush -F/etc/qemu-ga/f...

Feb 08 14:36:53 localhost.localdomain systemd[1]: Started QEMU Guest Agent.