On Fri, Oct 25, 2019 at 3:08 PM Milan Zamazal <mzamazal@redhat.com> wrote:

Hi, I looked at the failing migrations in OST on el8, when running
basic-suite-master with https://gerrit.ovirt.org/#/c/103888/31. The
migration fails even before started, when Vdsm tries to talk to the
remote Vdsm and can't reach it. Indeed, there seems to be a networking
problem between the hosts:

[root@lago-basic-suite-master-host-1 ~]# ping -c 1 lago-basic-suite-master-host-0
PING lago-basic-suite-master-host-0(lago-basic-suite-master-host-0.lago.local (fd8f:1391:3a82:201::c0a8:c902)) 56 data bytes
From lago-basic-suite-master-host-1 (fd8f:1391:3a82:200::c0a8:c899): icmp_seq=1 Destination unreachable: Address unreachable

Maybe it is related that the default IP version is flipped from IPv4 in CentOS7 to IPv6 in CentOS8.

This means that if IPv6 is enabled in the dns, it is required to be enabled on the source and destination host.

I will have a detailed look.

Regards,
Milan
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