Document Type | Technical Information
Category | Installation
Applicable Product Version | 7FS02PS
Document Number | TINTI005
Overview
This document introduces the method for setting disk udev rules when configuring TAC in a Cloud environment.
When provided as a Block Storage Multi-attach service rather than iSCSI, the disk device name may change due to VM reboot, so it is necessary to set it using a unique Serial ID value.
Method
1. Command to Check Disk Serial ID
Command to check Serial ID:
udevadm info -q property [Device Name]Example)
udevadm info -q property /dev/vdc$ udevadm info -q property /dev/vdc DEVLINKS=/dev/tas/tb_disk01 /dev/disk/by-id/virtio-46a5d311-aa24-4f2e-a /dev/disk/by-path/pci-0000:00:06.0 /dev/disk/by-path/virtio-pci-0000:00:06.0 DEVNAME=/dev/vdc DEVPATH=/devices/pci0000:00/0000:00:06.0/virtio7/block/vdc DEVTYPE=disk ID_PATH=pci-0000:00:06.0 ID_PATH_TAG=pci-0000_00_06_0 ID_SERIAL=46a5d311-aa24-4f2e-a MAJOR=252 MINOR=32 SUBSYSTEM=block TAGS=:systemd: USEC_INITIALIZED=4854478496
2. Set Rule in /etc/udev/rule.d
AS-IS
ACTION=="add|change", KERNEL=="vdb", OWNER="tibero", GROUP="dba", MODE="0660" ACTION=="add|change", KERNEL=="vdb", SYMLINK+="tas/tb_disk01"
TO-BE
ACTION=="add|change", ATTRS{serial}=="46a5d311-aa24-4f2e-a", OWNER="tibero", GROUP="dba", MODE="0660"
ACTION=="add|change", ATTRS{serial}=="46a5d311-aa24-4f2e-a", SYMLINK+="tas/tb_disk01"