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

[Thomas Letherby]

Thanks Yaniv, that looks like a perfect starting point!

Thomas

On Sun, Feb 11, 2018, 1:36 AM Yaniv Kaul <ykaul at redhat.com> wrote:

> 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?
>>> >
>>> >
>>> > _______________________________________________
>>> > Users mailing list
>>> > Users at ovirt.org
>>> > http://lists.ovirt.org/mailman/listinfo/users
>>> >
>>>
>>
>> _______________________________________________
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>>
>>
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