[Bug 1264955] [NEW] libvirt: find-storage-pool-sources work unexpected

[Royce Lv]

Public bug reported:

1. how to reproduce:
    virsh find-storage-pool-sources-as netfs localhost

2. frequency:
    100%

3. expected result:
    list export paths of localhost

4. Actul result:
    virsh # find-storage-pool-sources-as netfs localhost
error: Failed to find any netfs pool sources
error: Cannot find '' in path: No such file or directory

5. Source code trace:
    In src/storage/storage_ backend_fs.c:

        if (source->nhost != 1) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                       _("Expected exactly 1 host for the storage pool"));
        goto cleanup;
    }

    state.host = source->hosts[0].name;

    cmd = virCommandNewArgList(SHOWMOUNT,
                               "--no-headers",
                               "--exports",
                               source->hosts[0].name,
                               NULL);
    
6. diagnose suggestion:
    It may because the build machine does not has a nfs-common installed, so SHOWMOUNT during configure, is configured as empty.
   So when running find-source cmd, SHOWMOUNT cannot be found so report error.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: libvirt-bin 1.0.2-0ubuntu11.13.04.4
ProcVersionSignature: Ubuntu 3.8.0-32.47-generic 3.8.13.10
Uname: Linux 3.8.0-32-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
Date: Mon Dec 30 17:05:07 2013
InstallationDate: Installed on 2013-10-06 (84 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: libvirt
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug raring

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Title:
  libvirt: find-storage-pool-sources work unexpected

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