[ovirt-users] Single server hosted engine... almost there

Wed Dec 7 22:42:05 UTC 2016

Hi,

OK, I reset things and tried again but was more more careful regarding the DNS setup which I believe was correct this. In other words, the FQDNs were resolved from both the host and the HE VM.

After the latest failure I execute 'ip address' to see the state of the interfaces. And lo and behold the /29 IP I had on eth0:1 no longer exists. 

So some context.

The server's primary IP is a /24 with the gw being the x.y.z.1.

I have have a /29 subnet to use for the VMs.

I have been presuming that I place the a.b.c.1/29 on eth0:1 for the subnet's gw and OVirt will ether keep it in place or migrate it to the ovirtmgmt device. Instead it is deleted during "hosted-engine --deploy".(Note, when the .1/29 is assigned to eth0:1, the IP address is reachable from the the Internet.)

Dnsmasq is configured to a) serve a.b.c.2/29 a.b.c.6/29 via DHCP and b) to resolve unique FQDNs for each IP. The he VM set to receive the a.b.c.2/29 address.

Am I missing and or just misunderstanding something here?

Oh, and does ip_forwarding need to be set in the kernel? (ie net.ipv4.ip_forward=1)

Thanks
Mark

----- Derek Atkins <derek at ihtfp.com> wrote:
> Hi,
> 
> You need to make sure resolv.conf is correct (both on the host AND on the
> engine vm).
> 
> So:   dig hostname
> (without the @local-ip)
> 
> As for the VM not coming up...  I'm not sure how to delay "engine-setup"
> run.  I presume you're running an engine appliance -- I ran my own CentOS
> install on the engine.  The logs imply it's suggesting you can access the
> engine VM console, but maybe it's exiting quickly?
> 
> -derek
> 
> On Wed, December 7, 2016 3:52 pm, Mark Steckel wrote:
> > I tested dnsmasq from the host by
> >
> >    dig hostname @local-ip
> >
> > Worked fine.
> >
> > The engine VM never comes up to the point where I can access it via the
> > console...
> >
> >
> > ----- Derek Atkins <derek at ihtfp.com> wrote:
> >> Hi,
> >>
> >> Ensure dnsmasq is working and can be accessed by the engine VM?
> >> Log in to the engine VM and test from there?
> >> Maybe set up *real* DNS?
> >>
> >> -derek
> >>
> >> On Wed, December 7, 2016 3:41 pm, Mark Steckel wrote:
> >> > Hi Derek,
> >> >
> >> > ----- Derek Atkins <derek at ihtfp.com> wrote:
> >> >> Hi Mark,
> >> >>
> >> >> The error is correct, hosted-engine-1.pcstrac.com is not a valid
> >> >> hostname:
> >> >>
> >> >> $ host hosted-engine-1.pcstrac.com
> >> >> $
> >> >>
> >> >> I'm lost, tho -- was this an error that occurred on the host during
> >> >> hosted-engine --deploy, or was it an error that occurred in the
> >> hosted
> >> >> enging VM when running engine-setup?
> >> >
> >> > I believe when it occurred when the running the engine-setup.
> >> >
> >> >
> >> >> If the former, you need to ensure that you have a real DNS name for
> >> your
> >> >> ovirt engine.  It's unclear (to me) that using /etc/hosts is
> >> sufficient.
> >> >> However looking at the logs, it looks like it can locally resolve (to
> >> >> xx.yy.18.122).
> >> >
> >> > Yep. I tested things to make sure it could resolve before I started
> >> the
> >> > 'hosted-engine --deploy'.
> >> >
> >> >> You might need to answer "Yes" to the /etc/hosts question..
> >> >
> >> > I did answer "Yes".
> >> >
> >> >
> >> >> The log seems to get far enough along that it presents you the engine
> >> vm
> >> >> console URL?  It looks like the issue is that the engine vm cannot
> >> >> resolve
> >> >> its own name.
> >> >
> >> > That is my take as well.
> >> >
> >> > Scratching my head as I config'ed dnsmasq to provide local dns and to
> >> read
> >> > from /etc/hosts for hosted-engine-1.pcstrac.com.
> >> >
> >> > The only thing I think I flubbed was neglecting to add the host's IP
> >> to
> >> > the host's /etc/resolv.conf.
> >> >
> >> > Scrubbing and staring again.
> >> >
> >> > Mark
> >> >
> >> >
> >> >>
> >> >> -derek
> >> >>
> >> >> On Wed, December 7, 2016 3:13 pm, Mark Steckel wrote:
> >> >> > Folks,
> >> >> >
> >> >> > Thanks to Didi in another thread I'm making progress. (Lesson
> >> learned,
> >> >> > choose 'disk' and not 'cdrom' when using the he-appliance.)
> >> >> >
> >> >> > So I reset to a fresh CentOS 7, installed various software packages
> >> >> > including ovirt.
> >> >> >
> >> >> > I configed eth0 with a /32 public IP. I also added an alias for a
> >> >> > x.x.x.1/29 on eth0:1.
> >> >> >
> >> >> > Finally I config'ed dnsmasq to provide both dhcp and dns (ensuring
> >> >> that it
> >> >> > will read from /etc/hosts before forwarding dns requests) and added
> >> >> the
> >> >> > IPs and hostsnames to /etc/hosts from the /29 IPs which are to be
> >> used
> >> >> by
> >> >> > the VMs.
> >> >> >
> >> >> > Things proceeded nicely till resolving the he vm fqdn. (I tested to
> >> >> make
> >> >> > sure that the he vm fqdm would resolve **Before** I ran
> >> 'hosted-engine
> >> >> > --deploy'.)
> >> >> >
> >> >> >           |-           --== NETWORK CONFIGURATION ==--
> >> >> >           |-
> >> >> >           |- [ ERROR ] Host name is not valid:
> >> >> hosted-engine-1.pcstrac.com
> >> >> > did not resolve into an IP address
> >> >> >           |- [ ERROR ] Failed to execute stage 'Environment
> >> >> > customization': Host name is not valid:
> >> >> > hosted-engine-1.pcstrac.com did not resolve into an IP address
> >> >> >           |- [ INFO  ] Stage: Clean up
> >> >> >           |-           Log file is located at
> >> >> > /var/log/ovirt-engine/setup/ovirt-engine-setup-20161207193757-6i03xg.log
> >> >> >           |- [ INFO  ] Generating answer file
> >> >> > '/var/lib/ovirt-engine/setup/answers/20161207193758-setup.conf'
> >> >> >           |- [ INFO  ] Stage: Pre-termination
> >> >> >           |- [ INFO  ] Stage: Termination
> >> >> >           |- [ ERROR ] Execution of setup failed
> >> >> >           |- HE_APPLIANCE_ENGINE_SETUP_FAIL
> >> >> >     [ ERROR ] Engine setup failed on the appliance
> >> >> >     [ ERROR ] Failed to execute stage 'Closing up': Engine setup
> >> >> failed on
> >> >> > the appliance Please check its log on the appliance.
> >> >> >
> >> >> >
> >> >> > The one thing I forgot is to update /etc/resolv.conf to include the
> >> >> host
> >> >> > though I don't know if this matters...
> >> >> >
> >> >> > Logs attached.
> >> >> >
> >> >> > I suspect I've very close to having this working but am admittedly
> >> >> > stumped.
> >> >> >
> >> >> > Pointers appreciated.
> >> >> >
> >> >> > Thanks
> >> >> > Mark
> >> >> >
> >> >> >
> >> >> > _______________________________________________
> >> >> > Users mailing list
> >> >> > Users at ovirt.org
> >> >> > http://lists.ovirt.org/mailman/listinfo/users
> >> >> >
> >> >>
> >> >>
> >> >> --
> >> >>        Derek Atkins                 617-623-3745
> >> >>        derek at ihtfp.com             www.ihtfp.com
> >> >>        Computer and Internet Security Consultant
> >> >>
> >> >
> >> >
> >>
> >>
> >> --
> >>        Derek Atkins                 617-623-3745
> >>        derek at ihtfp.com             www.ihtfp.com
> >>        Computer and Internet Security Consultant
> >>
> >
> >
> 
> 
> -- 
>        Derek Atkins                 617-623-3745
>        derek at ihtfp.com             www.ihtfp.com
>        Computer and Internet Security Consultant
> 