RE: help needed to manage s390x host for ci.debian.net

I am not CI/networking expert, but I will be more than happy to assist.
I am at +0530 hrs available widely.

Thanks,
-Dipak Zope
Debian s390 porting team

On 13/02/23, 3:09 AM, "Paul Gevers" <[email protected]> wrote:
Hi Phil and all others offering help,

On 12-02-2023 20:32, Philipp Kern wrote:
> On 11.02.23 18:18, Paul Gevers wrote:
>   * [suspect 1] network issues between the s390x and the main ci.d.n
>> server (the results (log files) of the autopkgtests are transferred to
>> the main server). Our ppc64el hosts are also located at Marist, so I
>> would expect commonality here, but also ppc64el isn't performing
>> great, so maybe part of the problem is common.
>
> Do you have any kind of statistics on the network connections? I.e. how
> often it reconnects and how long it takes to reconnect? The Marist
> network has a very weird firewall inbound (e.g. if I do too many SSH
> requests in a row, I'm backholed) - so I would not be surprised if there
> is some weirdness there.

I have munin [1], but as said, I'm not a trained sysadmin. I don't know
what I'm looking for if you ask "statistics on the network".

Also, I have no experience with s390x except for deploying the Debian
software on the server setup by Phil. All the quirks of s390x are beyond me.

I can provide logging from the host, but I'll need detailed instructions
of what people find useful to look at. Recently Antonio taught me a
trick to provide temporary access to a lxc container on any of our
hosts, so if it helps to be on the host (but inside lxc) we can provide
for that.

Paul

[1]
https://ci.debian.net/munin/ci-worker-s390x-01/ci-worker-s390x-01/index.html