[ovirt-users] hosted engine , how to make changes to the VM post deploy

[Alastair Neil]

does the broker automatically sync the change you made
in /etc/ovirt-hosted-engine/hosted-engine.conf to the other ha hosts or did
you omit a step?


On 6 November 2014 11:10, Groten, Ryan <Ryan.Groten at stantec.com> wrote:

> I went through this a couple months ago.  Migrated my hosted-engine from
> one NFS host to another.  Here are the steps that I documented from the
> experience.  There is probably a better way, but this worked for me on two
> separate hosted-engine environments.
>
>         1. Make a backup of RHEV-M
>         2. Migrate VMs off all hosts that run hosted-engine (except
> hosted-engine itself)
>         3. Put hosted-engine hosts in maintenance mode (except host that's
> running hosted-engine)
>         4. Put hosted-engine in global maintenance mode
>         5. Shutdown hosted-engine
>         6. Stop ovirt-ha-agent and ovirt-ha-broker services on all
> hosted-engine hosts
>         7. On each hosted-engine host:
>                 a. service ovirt-ha-agent stop
>                 b. service ovirt-ha-broker stop
>                 c. sanlock client shutdown -f 1
>                 d. service sanlock stop
>                 e. umount /rhev/data-center/mnt/<hosted-engine-share>
>                 f. service sanlock start
>         8. mount new NFS share on /hosted_tgt
>         9. mount old NFS share on /hosted_src
>         10. Copy data (make sure sparse files are kept sparse):
>                 a. rsync --sparse -crvlp /hosted_src/* /hosted_tgt/
>         11. Edit /etc/ovirt-hosted-engine/hosted-engine.conf and change
> path:
>                 storage=10.1.208.122:/HostedEngine_Test
>         12. Make sure permissions are vdsm:kvm in /hosted_tgt/
>         13. umount /hosted_tgt
>         14. umount /hosted_src
>         15. Pick one hosted-engine host and reboot, then run:
>                 a. hosted-engine --connect-storage (make sure the new NFS
> is mounted properly)
>                 b. hosted-engine --start-pool (wait a few seconds then try
> again if you get an error)
>                 c. service ovirt-ha-broker start
>                 d. service ovirt-ha-agent start
>                 e. hosted-engine --vm-start
>
>
> -----Original Message-----
> From: users-bounces at ovirt.org [mailto:users-bounces at ovirt.org] On Behalf
> Of Frank Wall
> Sent: November-06-14 8:12 AM
> To: Jiri Moskovcak
> Cc: users
> Subject: Re: [ovirt-users] hosted engine , how to make changes to the VM
> post deploy
>
> On Wed, Nov 05, 2014 at 08:11:39AM +0100, Jiri Moskovcak wrote:
> > On 11/04/2014 03:52 PM, Alastair Neil wrote:
> > > So is this the workflow?
> > >
> > >     set the hosted-engine maintenance to global
> > >     shutdown the engine VM
> > >     make changes via virsh or editing vm.conf
> > >     sync changes to the other ha nodes
> > >     restart the VM
> > >     set hosted-engine maintenance to none
> >
> > - well, not official, because it can cause a lot of troubles, so I
> > would not recommend it unless you have a really good reason to do it.
>
> I'd like to move my ovirt-engine VM to a new NFS storage.
> I was thinking to adopt this workflow for this use-case (in combination
> with rsync to mirror the old storage).
>
> Do you think this would succeed or is there another (and maybe
> "supported") way to move ovirt-engine to a different storage?
>
>
> Regards
> - Frank
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