CentOS 绑定裸设备 start

操作系统：centos7
操作：安装DMDSC集群，绑定裸设备，执行start_udev

-bash: start_udev: command not found

[root@loaclhost ~]# cat >/etc/udev/rules.d/60-raw.rules <<-EOF
ACTION=="add", KERNEL=="sdb1", RUN+="/bin/raw /dev/raw/raw1 %N"
ACTION=="add", KERNEL=="sdc1", RUN+="/bin/raw /dev/raw/raw2 %N"
ACTION=="add", KERNEL=="sdd1", RUN+="/bin/raw /dev/raw/raw3 %N"
ACTION=="add", KERNEL=="sde1", RUN+="/bin/raw /dev/raw/raw4 %N"
ACTION=="add", KERNEL=="raw[1-4]", OWNER="root", GROUP="root", MODE="660"
EOF

[root@loaclhost ~]# partprobe
-bash: start_udev: command not found

重启UDEV相关的服务，也可以选择重启操作系统

# 查看系统当前可查到的裸设备
[root@loaclhost ~]# ls -ltr /dev/raw/          
total 0
crw-rw----. 1 root disk 162, 0 May 11  2022 rawctl

# 查看系统中与UDEV相关的服务
[root@loaclhost ~]# ls -ltr /usr/lib/systemd/system/ | grep udev
-rw-r--r--. 1 root root  751 Oct  1  2020 systemd-udev-trigger.service
-rw-r--r--. 1 root root  827 Oct  1  2020 systemd-udev-settle.service
-rw-r--r--. 1 root root  812 Oct  1  2020 systemd-udevd.service
-rw-r--r--. 1 root root  570 Oct  1  2020 systemd-udevd-kernel.socket
-rw-r--r--. 1 root root  595 Oct  1  2020 systemd-udevd-control.socket
-rw-r--r--. 1 root root  668 Oct  1  2020 initrd-udevadm-cleanup-db.service
lrwxrwxrwx. 1 root root   56 May 11  2022 dracut-pre-udev.service -> ../../dracut/modules.d/98systemd/dracut-pre-udev.service

# 前五个服务说明如下
systemd-udev-settle.service  loaded active exited  udev Wait for Complete Device Initialization
systemd-udev-trigger.service loaded active exited  udev Coldplug all Devices
systemd-udevd.service        loaded active running udev Kernel Device Manager
systemd-udevd-control.socket loaded active running udev Control Socket
systemd-udevd-kernel.socket  loaded active running udev Kernel Socket

在这里，解决我们上面即时应用RAW策略的问题的相关服务是：systemd-udev-trigger.service
以下是从网上搜索到的可能有效的方法，可以尝试一下：

# 方式1
systemctl restart systemd-udev-trigger.service

# 方式2
/sbin/udevadm trigger --type=devices --action=change
udevadm trigger

配置完udev rule规则文件后，重启服务器

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