On Mon, Jun 22, 2020 at 8:58 AM Yedidyah Bar David <[email protected]> wrote:
>
> On Sun, Jun 21, 2020 at 7:36 PM Gilboa Davara <[email protected]> wrote:
> >
> > On Thu, Jun 18, 2020 at 2:54 PM Yedidyah Bar David <[email protected]> wrote:
> > >
> > > On Thu, Jun 18, 2020 at 2:37 PM Gilboa Davara <[email protected]> wrote:
> > > >
> > > > On Wed, Jun 17, 2020 at 12:35 PM Yedidyah Bar David <[email protected]> 
> > > > wrote:
> > > > > > However, when trying to install 4.4 on the test CentOS 8.x (now 8.2
> > > > > > after yesterday release), either manually (via hosted-engine 
> > > > > > --deploy)
> > > > > > or by using cockpit, fails when trying to download packages (see
> > > > > > attached logs) during the hosted engine deployment phase.
> > > > >
> > > > > Right. Didn't check them - I guess it's the same, no?
> > > >
> > > > Most likely you are correct. That said, the console version is more 
> > > > verbose.
> > > >
> > > >
> > > > > > Just to be clear, it is the hosted engine VM (during the deployment
> > > > > > process) that fails to automatically download packages, _not_ the
> > > > > > host.
> > > > >
> > > > > Exactly. That's why I asked you (because the logs do not reveal that)
> > > > > to manually login there and try to install (update) the package, and
> > > > > see what happens, why it failes, etc. Can you please try that? Thanks.
> > > >
> > > > Sadly enough, the failure comes early in the hosted engine deployment
> > > > process, making the VM completely inaccessible.
> > > > While I see qemu-kvm briefly start, it usually dies before I have any
> > > > chance to access it.
> > > >
> > > > Can I somehow prevent hosted-engine --deploy from destroying the
> > > > hosted engine VM, when the deployment fails, giving me access to it?
> > >
> > > This is how it should behave normally, it does not kill the VM.
> > > Perhaps check logs, try to find who/what killed it.
> > >
> > > Anyway: Earlier today I pushed this patch:
> > >
> > > https://gerrit.ovirt.org/109730
> > >
> > > Didn't yet get to try verifying it. Would you like to try? You can get
> > > an RPM from the CI build linked there, or download the patch and apply
> > > it manually (in the "gitweb" link [1]).
> > >
> > > Then, you can do:
> > >
> > > hosted-engine --deploy --ansible-extra-vars=he_offline_deployment=true
> > >
> > > If you try this, please share the results. Thanks!
> > >
> > > [1] 
> > > https://gerrit.ovirt.org/gitweb?p=ovirt-hosted-engine-setup.git;a=commitdiff_plain;h=f77fa8b84ed6d8a74cbe56b95accb1e8131afbb5
>
> Now filed https://bugzilla.redhat.com/1849517 for this.
>
> > >
> > > Best regards,
> > > --
> > > Didi
> > >
> >
> > Good news. I managed to connect to the VM and solve the problem.
>
> Glad to hear that, thanks for the report!
>
> >
> > For some odd reason our primary DNS server had upstream connection
> > issues and all the requests were silently handled by our secondary DNS
> > server.
> > Not sure I understand why, but while the ovirt host did manage to
> > silently spill over to the secondary DNS, the hosted engine, at least
> > during the initial deployment phase (when it still uses the host's
> > dnsmasq), failed to spill over to the secondary DNS server and the
> > deployment failed.
>
> Sounds like a bug in dnsmasq, although I am not sure.
>
> That said, DNS/DHCP are out of scope for oVirt. We simply assume they
> are robust.
>
> In retrospective, what do you think we should have done differently
> to make it easier for you to find (and fix) the problem?
>
> Best regards,
> --
> Didi

In retrospect, the main problem was the non-descriptive error message
generated by DNF (which has nothing to do with the ovirt installer).
That said, this could easily be circumvented by adding a simple
network-test script to the installer playbook.

Then again, the problem was clearly on my side...

- Gilboa
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