On Thu, Sep 28, 2017 at 3:03 PM, Michael Burman <[email protected]> wrote:
> When you delete the host, all files remain as they were before. Nothing > changes. > I have tested this flow today and this is the result: > > 1) For example i have host installed with ovirtmgmt as my management and i > want to change the management network of the cluster or to add to a new > cluster with different management network. > > 2) Follow the steps create another network as the management network(as > explained in the mail or feature page). Make sure to check the 'default > route' property as well! and make ovirtmgmt as non-required network as well. > > 3) Remove the host - no need to remove any files or packages > > 4) Add the host to the new cluster with the new management network. > > 5) What will happen is that engine will fail to configure the new > management network on the host(and become non-operational), but it is > easily can be work around by going to the setup networks dialog and switch > between the networks, by detaching ovirtmgmt and attaching the new > management network. After pressing OK the new management network will be > saved on the host and the new network configuration will be applied on the > host. > > 6) After this step host still remain as non-operational, all we need to do > now is to 'Activate' the host and host become operational once again with > the new network changes will take place. All files will be update > successfully on the host. > > - So it looks like we not handling such scenario smoothly and maybe this > should be fixed. > If we had a host running with 1 management network and we want to add this > host to a different cluster with a different management network engine and > vdsm should be able to take care of it during the installation of the host > and to successfully make all the required changes. > > Dan , Alona what do you think? should we handle such use case? or this is > expected? > Pert Horacek recently wrote a vdsm-tool to remove networks from a host that is no longer used by oVirt. https://gerrit.ovirt.org/#/c/79495/ - link to Petr's code. It will be officially available on 4.2. > > > > > > On Wed, Sep 27, 2017 at 7:24 PM, Gianluca Cecchi < > [email protected]> wrote: > >> >> >> On Wed, Sep 27, 2017 at 4:32 PM, Michael Burman <[email protected]> >> wrote: >> >>> I was referring to situation in which the host was there before, but you >>> need to re-install it to the new cluster with the new management network. >>> >>> No package removing is needed at all. Why would you do steps 2-4? no >>> need. >>> Step 5 should work. >>> >>> I'm not sure i understand what you mean by ' still I cannot remove the >>> default ovirtmgmt network from that cluster'?? >>> Do you want to detach it from the cluster? >>> Do you want to remove it from the DC? >>> Note that you can change the management network role only if the cluster >>> has no hosts in it. >>> >>> >>> >> I will try this way. >> Normally in my setups the ip on the mgmt network of the host is also the >> ip corresponding to its hostname >> When I delete a host from engine, what happens in relation to its network >> files in /etc/sysconfig/network-scripts/ directory and the contents of >> /var/lib/vdsm/ directory and its subdirectories? >> >> > > > > -- > > Michael Burman > > Quality engineer - rhv network - redhat israel > > Red Hat > > <https://www.redhat.com> > > [email protected] M: 0545355725 IM: mburman > <https://red.ht/sig> >
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