Bug 1095135

Summary:	can't use iso images on readonly nfs filesystem
Product:	Red Hat Enterprise Linux 6	Reporter:	EricLee <bili>
Component:	libvirt	Assignee:	Michal Privoznik <mprivozn>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	6.6	CC:	cwei, didi, dyuan, eblake, kraxel, mzhan, rbalakri, riehecky, shyu, weizhan
Target Milestone:	rc	Keywords:	Upstream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	libvirt-0.10.2-36.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	996543	Environment:
Last Closed:	2014-10-14 04:21:45 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:
Bug Depends On:	996543
Bug Blocks:

Comment 2 Michal Privoznik 2014-05-07 11:22:55 UTC

Moving to POST:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2014-May/msg00155.html

Comment 4 chhu 2014-05-27 05:06:46 UTC

Reproduced with libvirt-0.10.2-33.el6.x86_64,

Verified with packages:
libvirt-0.10.2-37.el6.x86_64
libvirt-client-0.10.2-37.el6.x86_64

Test steps:
1. prepare the iso image which is located on a read-only nfs export.
mount -o ro 10.66.90.121:/vol/S3/libvirtmanual /mnt/tmp/

2. check the environment.
# getsebool virt_use_nfs
virt_use_nfs --> on
# getenforce
Enforcing

3. define, start a domain with an iso on readonly filesystem as cdrom.
# virsh dumpxml r6| grep disk -C 5
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/r6.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw' cache='none' io='native'/>
      <source file='/mnt/nfs/rhel7.iso'/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
# virsh start r6
Domain r6 started

4. login to the guest, mount the iso, can read and can not write.

Test results:
current command work well.

Comment 7 errata-xmlrpc 2014-10-14 04:21:45 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.

http://rhn.redhat.com/errata/RHBA-2014-1374.html