Bug 1153515

Summary:	empty (but set) LIBGUESTFS_BACKEND prints libguestfs: error: invalid backend:
Product:	Red Hat Enterprise Linux 7	Reporter:	Richard W.M. Jones <rjones>
Component:	libguestfs	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.1	CC:	codong, dyuan, juzhou, mbooth, mzhan, ptoscano, tzheng
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	V2V
Fixed In Version:	libguestfs-1.27.64-1.1.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-03-05 13:46:23 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 Richard W.M. Jones 2014-10-16 06:31:49 UTC

Description of problem:

$ LIBGUESTFS_BACKEND="" guestfish -a /dev/null run
libguestfs: error: invalid backend: 
$ echo $?
0

The error should not be printed.  An empty environment
variable should use the default.

Version-Release number of selected component (if applicable):

libguestfs 1.27.62

How reproducible:

100%

Steps to Reproduce:
1. See above.

Comment 2 Richard W.M. Jones 2014-10-16 07:02:19 UTC

Upstream fix:
https://github.com/libguestfs/libguestfs/commit/249aae0c2ffa685008c03f5d06e05c2989b1ec99

(will be in 1.27.64)

Comment 4 tingting zheng 2014-10-20 05:45:21 UTC

Tested with:
libguestfs-1.28.1-1.1.el7.x86_64
virt-v2v-1.28.1-1.1.el7.x86_64

1.# LIBGUESTFS_BACKEND="" guestfish -a /dev/null run

2. Test with virt-v2v.
# export LIBGUESTFS_BACKEND=
# echo $LIBGUESTFS_BACKEND

# virt-v2v -ic xen+ssh://10.66.106.64 -os default rhel6.6-pv-x64-test
[   0.0] Opening the source -i libvirt -ic xen+ssh://10.66.106.64 rhel6.6-pv-x64-test
virt-v2v: error: because of libvirt bug 
https://bugzilla.redhat.com/show_bug.cgi?id=1134592 you must set this 
environment variable:

export LIBGUESTFS_BACKEND=direct

and then rerun the virt-v2v command.

If reporting bugs, run virt-v2v with debugging enabled and include the 
complete output:

  virt-v2v -v -x [...]

3.Also tested with other sets,eg:test
# LIBGUESTFS_BACKEND="test" guestfish -a /dev/null run
libguestfs: error: invalid backend: test

# export LIBGUESTFS_BACKEND="test"
# virt-v2v -ic xen+ssh://10.66.106.64 -os default rhel6.6-pv-x64-test
[   0.0] Opening the source -i libvirt -ic xen+ssh://10.66.106.64 rhel6.6-pv-x64-test
libguestfs: error: invalid backend: test
virt-v2v: error: because of libvirt bug 
https://bugzilla.redhat.com/show_bug.cgi?id=1134592 you must set this 
environment variable:

export LIBGUESTFS_BACKEND=direct

and then rerun the virt-v2v command.

If reporting bugs, run virt-v2v with debugging enabled and include the 
complete output:

  virt-v2v -v -x [...]


The error is clear,so move the bug to VERIFIED.

Comment 6 errata-xmlrpc 2015-03-05 13:46:23 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-2015-0303.html