From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jim Fehlig <jfehlig@suse.com>
Subject: Re: [osstest test] 60719: tolerable FAIL - PUSHED
Date: Thu, 3 Sep 2015 20:47:53 -0600
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References: <osstest-60719-mainreport@xen.org>
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To: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>, Ian Campbell <ian.campbell@citrix.com>, xen-devel <xen-devel@lists.xen.org>
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On 09/01/2015 06:47 AM, Ian Jackson wrote:
> Jim Fehlig writes ("Re: [osstest test] 60719: tolerable FAIL - PUSHED"):
>> This sounds a bit like an issue discussed in the Redhat libvirt troubleshooting FAQ
>>
>> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Troubleshooting-Common_libvirt_errors_and_troubleshooting.html#sect-Migration_fails_with_Error_unable_to_resolve_address
>> Right. If it is a DNS issue, error handling in the libvirt libxl
>> migration code needs improving.
> I booked out a test host, and (as I expected) forward DNS works, but
> reverse DNS on test box IP addresses does not:
>
> root@nocera0:~# host nocera1.test-lab.xenproject.org
> nocera1.test-lab.xenproject.org has address 172.16.144.23
> root@nocera0:~# host -i 172.16.144.23
> Host 23.144.16.172.in-addr.arpa. not found: 3(NXDOMAIN)
> root@nocera0:~# cat /etc/hosts
> 127.0.0.1       localhost
> 127.0.1.1       nocera0.test-lab.xenproject.org nocera0
>
> # The following lines are desirable for IPv6 capable hosts
> ::1     localhost ip6-localhost ip6-loopback
> ff02::1 ip6-allnodes
> ff02::2 ip6-allrouters
> root@nocera0:~# cat /etc/resolv.conf
> domain test-lab.xenproject.org
> search test-lab.xenproject.org
> nameserver 172.16.148.4
> nameserver 172.16.144.3
> root@nocera0:~#
>
> That admin guide article isn't quite clear, but reading between the
> lines and applying some supposition, maybe libvirt is doing a reverse
> lookup on some associated IP address ?
>
> I can probably put the test boxes in the reverse DNS, but really I
> think at the very least libvirt's error message needs to be improved
> too.

The unhelpful "Invalid argument" error has been fixed

http://libvirt.org/git/?p=libvirt.git;a=commit;h=6ce939c2472e8cd97dfe448e902bc878c826351e

Regards,
Jim