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Bug 1174569

Summary: guest cannot start with a shareable hostdev network iscsi device
Product: Red Hat Enterprise Linux 7 Reporter: Luyao Huang <lhuang>
Component: libvirtAssignee: Michal Privoznik <mprivozn>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1CC: dyuan, mprivozn, mzhan, rbalakri, yisun
Target Milestone: rcKeywords: Upstream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-1.2.13-1.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-19 05:59:07 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Luyao Huang 2014-12-16 03:16:18 UTC 
description of problem:
guest cannot start with a shareable hostdev network iscsi device

Version-Release number of selected component (if applicable):
libvirt-1.2.8-10.el7.x86_64

How reproducible:
100%

Steps to Reproduce:

1.prepare a guest have a shareable hostdev network iscsi device
<hostdev mode='subsystem' type='scsi' managed='no'>
      <source protocol='iscsi' name='iqn.2014-11.com.lhuang:tgt1/2'>
        <host name='test1' port='3260'/>
      </source>
      <readonly/>
      <shareable/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </hostdev>

2.start the guest
# virsh start test4
error: Failed to start domain test4
error: internal error: Cannot parse adapter 'iqn.2014-11.com.lhuang:tgt1/2'

Actual results:
cannot start
      
Expected results:
can start


Additional info:
Comment 1 Michal Privoznik 2014-12-17 10:32:37 UTC 
I've just pushed the patch upstream:

commit dddd83273538d0248cc16aecab012169d6552341
Author:     Luyao Huang <lhuang>
AuthorDate: Tue Dec 16 11:16:58 2014 +0800
Commit:     Michal Privoznik <mprivozn>
CommitDate: Wed Dec 17 11:23:00 2014 +0100

    conf: fix cannot start a guest have a shareable network iscsi hostdev
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1174569
    
    There's nothing we need to do for shared iSCSI devices in
    qemuAddSharedHostdev and qemuRemoveSharedHostdev. The iSCSI layer
    takes care about that for us.
    
    Signed-off-by: Luyao Huang <lhuang>
    Signed-off-by: Michal Privoznik <mprivozn>

v1.2.11-53-gdddd832
Comment 2 yisun 2015-04-01 14:52:56 UTC 
VERIFIED


Versions:
libvirt-1.2.13-1.el7.x86_64

steps:
1. discover a iscsi lun disk
# iscsiadm --mode discovery --type sendtargets --portal 10.xx.yy.zz  (ip hidden)
10.xx.yy.zz:3260,1 www.lento.com:sunyi1 

2. start a vm with above iscsi disk
    <hostdev mode='subsystem' type='scsi' managed='no'>
      <source protocol='iscsi' name='www.lento.com:sunyi1/1'>
        <host name='10.xx.yy.zz' port='3260'/>
      </source>
      <readonly/>
      <shareable/>
      <alias name='hostdev0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </hostdev>

  # virsh start rhel7.0
Domain rhel7.0 started

3. in guest os, check the iscsi disk really attached. 
root@guest # fdisk -l 
...
Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
...
Comment 4 errata-xmlrpc 2015-11-19 05:59:07 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2202.html