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Re: [Qemu-devel] [Qemu/Virtio-scsi]The feature of 'raw device mapping' c


From: Qixiaozhen
Subject: Re: [Qemu-devel] [Qemu/Virtio-scsi]The feature of 'raw device mapping' cannot isolate the LUN to the owning virtual machine
Date: Mon, 27 Jan 2014 12:22:52 +0000

> 
> Il 27/01/2014 03:50, Qixiaozhen ha scritto:
> > A scsi report command was executed in the instance, for example
> > "sg_luns /dev/vdb". However, It returned the list of the Luns in the SAN.
> 
> This is a known problem in virtio-blk's SCSI emulation.  Just don't use it, 
> use
> virtio-scsi or another SCSI adapter instead.

I am not sure whether there was something wrong with my xml. The content of the 
configuration xml lists:

address@hidden sdb]# virsh dumpxml 6
<domain type='kvm' id='6'>
  <name>instance-00000qxz</name>
  <uuid>2052f60e-a273-42b4-bdb7-e633f41e1624</uuid>
  <memory unit='KiB'>4194304</memory>
  <currentMemory unit='KiB'>4194304</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>Red Hat Inc.</entry>
      <entry name='product'>OpenStack Nova</entry>
      <entry name='version'>2013.2-5.el6</entry>
      <entry name='serial'>1b800e36-ed60-117b-8567-000000821800</entry>
      <entry name='uuid'>2052f60e-a273-42b4-bdb7-e633f41e1624</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='rhel6.4.0'>hvm</type>
    <boot dev='hd'/>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-model'>
    <model fallback='allow'/>
  </cpu>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='rtc' tickpolicy='catchup'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/home/sdb/centos64.qcow2'/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
    </disk>
    <!-- #############Raw Device Mapping with virtio-scsi################## -->
    <disk type='block' device='lun'>
      <driver name='qemu' type='raw' cache='none'/>
      <source dev='/dev/mapper/360022a110000ecba5db427db00000023'/>
      <target dev='vdb' bus='virtio'/>
      <alias name='virtio-disk1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' 
function='0x0'/>
    </disk>
    <!-- ########### Compare with the above one ################## -->
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw' cache='none'/>
      <source dev='/dev/mapper/360022a110000ecba5db4074800000022'/>
      <target dev='vdc' bus='virtio'/>
      <alias name='virtio-disk2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' 
function='0x0'/>
    </disk>
    <controller type='usb' index='0'>
      <alias name='usb0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x2'/>
    </controller>
    <!-- #################virtio-scsi controller##################### -->
    <controller type='scsi' index='0' model='virtio-scsi'>
      <alias name='scsi0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
    </controller>
    <serial type='pty'>
      <source path='/dev/pts/2'/>
      <target port='1'/>
      <alias name='serial0'/>
    </serial>
    <console type='pty'>
      <source path='/dev/pts/2'/>
      <target type='serial' port='1'/>
      <alias name='serial0'/>
    </console>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
    </input>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5900' autoport='yes' listen='186.100.8.169' 
keymap='en-us'>
      <listen type='address' address='186.100.8.169'/>
    </graphics>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>unconfined_u:system_r:svirt_t:s0:c156,c614</label>
    <imagelabel>unconfined_u:object_r:svirt_image_t:s0:c156,c614</imagelabel>
  </seclabel>
</domain>

address@hidden sdb]#


Paolo, would you mind to give me some advice to fix my xml? And I am not 
familiar with this.

Sincerely,



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