[lxc-users] LXD 3.1: Raft: Failed to contact...

[Vlad]

Free,

Thanks for all the information. I've upgraded to LXD 3.2 and all the
issues I had are gone now. Good work ;-)

Regards,
Vlad.                                                                   
                                                                       
                                                                       
       

On 23/06/18 14:23, Free Ekanayaka wrote:
> Hello,
>
> first, you should use at least 3 nodes with a LXD cluster, otherwise if
> just single node goes down (even for a reboot) you're cluster is
> unavailable, because of lack of quorum.
>
> Regarding "lxc ..." commands, there are improvements under work that
> should improve performance quite a bit, likely to be released in LXD
> 3.3.
>
> Finally, the raft error is very likely related to this issue:
>
> https://github.com/lxc/lxd/issues/4548
>
> for which a mitigation is present in LXD 3.2 (which just got released),
> waiting for the larger fix in 3.3. That mitigation will also make your
> "lxc ..." commands more predictable in timings (no fluctuation),
> although for real improvements you'll have to wait 3.3, as said.
>
> So please upgrade to LXD 3.2, and if you still hit those issues let us
> know.
>
> Regards,
>
> Free
>
> Vlad <vovan at vovan.nl> writes:
>
>> Hello,
>>
>> I'm trying to setup 2 nodes LXD cluster and have some issues. Sometimes
>> "lxc ..." command takes 5-15 seconds to complete, so I checked log's and
>> I see every 10-15 minutes messages similar to the this one: "Raft:
>> Failed to contact 2 in 1.500151s" following by "Raft: Failed to contact
>> quorum of nodes, stepping down". The "lxc cluster list" command shows
>> that both nodes are "fully operational". Another thing is the amount of
>> TCP connections between two nodes:
>> netstat -tnap  | grep lxd | wc -l
>> 186
>>
>> Is this behavior expected or I'm missing something in configuration? I'd
>> appreciate any thoughts about the issues above.
>>
>> Regards,
>> Vlad.
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