[ovirt-users] Suggestions on changing hosts' network

[Irit Goihman]

On Mon, Jan 8, 2018 at 6:08 PM, Gianluca Cecchi <gianluca.cecchi at gmail.com>
wrote:

> On Mon, Jan 8, 2018 at 12:57 PM, Edward Haas <ehaas at redhat.com> wrote:
>
>>
>>>>
>>>
>>> hello,
>>> any update on how to give JSON representation (or other way) to use
>>> vdsm-client and change ip/gateway of ovirt-ng node?
>>> Thanks
>>>
>>
>> How to use vdsm-client in general: Just check its man page.
>> You will need to fill up the existing management network details in the
>> json format, replacing just the IP address.
>> The main concern here is, that if you missed something, it may be removed.
>> You should follow https://access.redhat.com/solutions/168983 for full
>> details.
>>
>> I would suggest using a different approach, although I have not tested it
>> myself:
>> Edit the persisted relevant configuration files:
>> /var/lib/vdsm/persistence/netconf
>> (Change the IP there, without touching the other stuff)
>> Then, reboot the host.. It should identify that the existing config is
>> not in sync with the persisted one and a reconfig will be issued
>> automatically.
>> The risk here is that the config will not successfully get applied, so
>> make sure you save the previous version.
>>
>> Thanks,
>> Edy.
>>
>>
> Actually I see some misalignment between what I see in man page, what I
> get with "-h" option and real command usage.
> Eg in oVirt 4.1.7 (vdsm-client-4.19.37-1.el7.centos.noarch):
>
> man vdsm-client
>
> "
>    Invoking commands with complex parameters
>        For invoking commands with complex or many arguments, you can read
> a JSON dictionary from a file:
>
>            vdsm-client Lease info -f lease.json
>
>        where lease.json file content is:
>
>            {
>                "lease": {
>                    "sd_id": "75ab40e3-06b1-4a54-a825-2df7a40b93b2",
>                    "lease_id": "b3f6fa00-b315-4ad4-8108-f73da817b5c5"
>                }
>            }
> "
>
> But actually if I create a json file and execute
>
> [root at ovirtng4101 ~]# vdsm-client Host setupNetworks -f network.json
>
> I get:
>
> usage: vdsm-client [-h] [-a HOST] [-p PORT] [--unsecure] [--insecure]
>                    [--timeout TIMEOUT] [-f FILE]
>                    namespace method [arg=value] ...
> vdsm-client: error: unrecognized arguments: -f
>
> Please try running:
# vdsm-client -f network.json Host setupNetworks
There is an error in the man page, I will fix it.

I have to try it in 4.1.8 if solved
>
> The workaround to change in place the file (in my case ipaddr and gateway
> fileds): /var/lib/vdsm/persistence/netconf.1515365150707441369/
> nets/ovirtmgmt
> and then shutdown/power on seems to work ok instead. I can reinstall the
> host and the change remains persistent across reboots
>
> Thanks for the pointer for RHEV doc, because I didn't find it at first
> glance and I have to do the same for a RHEV eval too; but it seems the
> problem is present also there with RHV-H installed in December (nodectl
> info reports that current layer is rhvh-4.1-0.20171101.0+1; probably the
> problem has been already solved, I have to check). I can give more details
> on this off-list if you like as this doesn't directly relate with oVirt.
>
> Thanks in the mean time for the persistence file method that I think/hope
> will work for RHV-H too if I don't update the image
>
> Gianluca
>
> PS: ok also for the "not officially supported." advise. This is only a
> test where two hosts are to be moved from datacenter 1 to datacenter 2...
>
>
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>
>


-- 

IRIT GOIHMAN

SOFTWARE ENGINEER

EMEA VIRTUALIZATION R&D

Red Hat EMEA <https://www.redhat.com/>

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