优化计算节点的libvirtd的LimitNOFILE
修改配置
/usr/lib/systemd/system/libvirtd.service
/usr/lib/systemd/system/virtlogd.service
LimitNOFILE=8192 修改为 LimitNOFILE=81920
/usr/lib/systemd/system/virtlockd.service
LimitNOFILE=16384 修改为 LimitNOFILE=163840
corefile 修改：https://www.cnblogs.com/276815076/p/5379584.html
重启libvirtd
systemctl daemon-reload
systemctl restart libvirtd
验证生效
cat /proc/`pgrep libvirtd`/limits | grep "Max open files"
Max open files 81920 81920 files