[ale] XenServer 7.x problem - anyone else using it?

Tue Aug 9 13:11:27 EDT 2016

Interesting. I'm not running btrfs on any of the servers in my cluster, so it looks like I may have a different issue.
-jt

James Taylor
678-697-9420
james.taylor at eastcobbgroup.com

>>> "Beddingfield, Allen" <allen at ua.edu> 8/9/2016 10:49 AM >>> 
Interesting update to this:

The problem ONLY occurs if I use Btrfs.  If I use XFS, it works as expected.  
What INSIDE a VM could possibly mess with the underlying LVM volumes for the virtualization host?  
As strange as it seems, I can readily duplicate it.

Allen B.

-- 
Allen Beddingfield
Systems Engineer
Office of Information Technology
The University of Alabama
Office 205-348-2251
allen at ua.edu

On 8/5/16, 3:33 PM, "ale-bounces at ale.org on behalf of Beddingfield, Allen" <ale-bounces at ale.org on behalf of allen at ua.edu> wrote:

    I have a PowerEdge R815 with XenServer 7 installed.  I am using the internal storage for VM storage (just a standalone server).
    I've created a SLES 12 SP1 VM (using the template provided).  Everything goes fine, I can load up the OS, patch it, do whatever with no problems.  However, if I power the VM down, I can't start it back. 
    I get "The SR failed to complete the operation".
    If I ssh into the Xen server and run "lvdisplay", it shows the status as "NOT available" - see below:

    [root at xentest01 ~]# lvdisplay
      --- Logical volume ---
      LV Path                /dev/VG_XenStorage-bebcb0ae-252f-5c52-ca61-9e66b0aa5869/MGT
      LV Name                MGT
      VG Name                VG_XenStorage-bebcb0ae-252f-5c52-ca61-9e66b0aa5869
      LV UUID                Cz6tVV-rCJp-Acu9-zC0T-PEo3-5tT3-2WLzsa
      LV Write Access        read/write
      LV Creation host, time xentest01, 2016-08-05 10:22:13 -0500
      LV Status              available
      # open                 0
      LV Size                4.00 MiB
      Current LE             1
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:0

      --- Logical volume ---
      LV Path                /dev/VG_XenStorage-bebcb0ae-252f-5c52-ca61-9e66b0aa5869/VHD-9ebd5bf6-4613-4fc6-9aa0-738496dae1c9
      LV Name                VHD-9ebd5bf6-4613-4fc6-9aa0-738496dae1c9
      VG Name                VG_XenStorage-bebcb0ae-252f-5c52-ca61-9e66b0aa5869
      LV UUID                vOZwtO-vuCF-WM26-hz3P-hghQ-dlsx-k5ZOvZ
      LV Write Access        read/write
      LV Creation host, time xentest01, 2016-08-05 14:08:25 -0500
      LV Status              NOT available
      LV Size                20.05 GiB
      Current LE             5132
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto

    [root at xentest01 ~]# 

    When I try to activate it, I get the following:

    [root at xentest01 ~]# vgchange -a y
      Operation prohibited while global/metadata_read_only is set.
      Operation prohibited while global/metadata_read_only is set.
      1 logical volume(s) in volume group "VG_XenStorage-bebcb0ae-252f-5c52-ca61-9e66b0aa5869" now active
    [root at xentest01 ~]# 

    Anyone have any idea what is going on? I've never had this issue with previous XenServer installs, but this is my first with 7.x.  FYI, I can readily reproduce this.  EVERY time I load a server and try this, I get the exact same result.

    Thanks.
    Allen B.

    -- 
    Allen Beddingfield
    Systems Engineer
    Office of Information Technology
    The University of Alabama
    Office 205-348-2251
    allen at ua.edu

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