[ovirt-users] Maximum time node can be offline.

[Yaniv Kaul]

On Sat, Feb 10, 2018 at 5:47 PM, Thomas Letherby <xrs444 at xrs444.net> wrote:

> That's exactly what I needed to know, thanks all.
>
> I'll schedule a script for the nodes to reboot and patch once every week
> or two and then I can let it run without me needing to worry about it.
>

An example on how to check for updates is available @
https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/upgrade_host.py
Y.


> Thomas
>
> On Fri, Feb 9, 2018, 2:26 AM Martin Sivak <msivak at redhat.com> wrote:
>
>> Hi,
>>
>> the hosts are almost stateless and we set up most of what is needed
>> during activation. Hosted engine has some configuration stored
>> locally, but that is just the path to the storage domain.
>>
>> I think you should be fine unless you change the network topology
>> significantly. I would also install security updates once in while.
>>
>> We can even shut down the hosts for you when you configure two cluster
>> scheduling properties: EnableAutomaticPM and HostsInReserve.
>> HostsInReserve should be at least 1 though. It behaves like this, as
>> long as the reserve host is empty, we shut down all the other empty
>> hosts. And we boot another host once a VM does not fit on other used
>> hosts and is places on the running reserve host. That would save you
>> the power of just one host, but it would still be highly available (if
>> hosted engine and storage allows that too).
>>
>> Bear in mind that single host cluster is not highly available at all.
>>
>> Best regards
>>
>> Martin Sivak
>>
>> On Fri, Feb 9, 2018 at 8:25 AM, Gianluca Cecchi
>> <gianluca.cecchi at gmail.com> wrote:
>> > On Fri, Feb 9, 2018 at 2:30 AM, Thomas Letherby <xrs444 at xrs444.net>
>> wrote:
>> >>
>> >> Thanks, that answers my follow up question! :)
>> >>
>> >> My concern is that I could have a host off-line for a month say, is
>> that
>> >> going to cause any issues?
>> >>
>> >> Thanks,
>> >>
>> >> Thomas
>> >>
>> >
>> > I think that if in the mean time you don't make any configuration
>> changes
>> > and you don't update anything, there is no reason to have problems.
>> > In case of changes done, it could depend on what they are: are you
>> thinking
>> > about any particular scenario?
>> >
>> >
>> > _______________________________________________
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>> > Users at ovirt.org
>> > http://lists.ovirt.org/mailman/listinfo/users
>> >
>>
>
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