Openstack架设使用中问题汇总

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2012-04-23 18:42:55 CRITICAL nova [-] Unable to allow access for disk path /dev/disk/by-path/ip-192.168.1.14:3260-iscsi-iqn.2010-10.org.openstack:volume-00000002-lun-1: No such file or directory

这会导致nova-conpute无法正常运行,造成错误的原因有2，一是设置了compute在启动的时候自动启动（自动恢复）instance状态；二是使用nova-volume后重启服务（此时compute会自动恢复instance状态),就会出现找不到volume的错误。

解决方案：

                                                    修改 /etc/nova.conf，注释两个选项：#start_guests_on_host_boot = True#resume_guests_state_on_host_boot =True以后就手动启动instance比较稳定。

                                                查看/dev/disk/by-path/下的文件root@Controller:~# ls -l /dev/disk/by-path/total 0lrwxrwxrwx 1 root root  9 Apr 23 21:17 pci-0000:00:1f.2-scsi-0:0:0:0 -> ../../sdalrwxrwxrwx 1 root root 10 Apr 23 21:17 pci-0000:00:1f.2-scsi-0:0:0:0-part1 -> ../../sda1lrwxrwxrwx 1 root root 10 Apr 23 21:17 pci-0000:00:1f.2-scsi-0:0:0:0-part2 -> ../../sda2lrwxrwxrwx 1 root root 10 Apr 23 21:17 pci-0000:00:1f.2-scsi-0:0:0:0-part5 -> ../../sda5lrwxrwxrwx 1 root root 10 Apr 23 21:17 pci-0000:00:1f.2-scsi-0:0:0:0-part6 -> ../../sda6

发现都是符号链接，执行：

                                                                                       root@Controller:~# tgtadm --lld iscsi --op show --mode targetTarget 2: iqn.2010-10.org.openstack:volume-00000003    System information:        Driver: iscsi        State: ready    I_T nexus information:    LUN information:        LUN: 0            Type: controller            SCSI ID: IET     00020000            SCSI SN: beaf20            Size: 0 MB, Block size: 1            Online: Yes            Removable media: No            Readonly: No            Backing store type: null            Backing store path: None            Backing store flags:         LUN: 1            Type: disk            SCSI ID: IET     00020001            SCSI SN: beaf21            Size: 10737 MB, Block size: 512            Online: Yes            Removable media: No            Readonly: No            Backing store type: rdwr            Backing store path: /dev/nova-volumes/volume-00000003

找到相应确实的东西，手动在by-path下建立链接，重启nova-compute服务即可。