Unable to ssh to lop1

[Predrag Punosevac]

Hi Shimeng,

I hope you don't mind me CC-ing all Auton Lab users as this affect lot
of people. I will give the explanation first and then propose the
solution. Namely about year and a half ago based upon experience I
gained over the years with Auton Lab users and ZFS file system we
started migrating user home directories to separate ZFS data sets (if
people are not familiar with ZFS please refer to Oracle former Sun
Microsystem documentation as it is TL:TW). That meant that we also
have to utilize autofs daemon to do dynamic mounting of home
directories as previously used /etc/fstab method would mean few
thousand NFS client mounts on our file server.

Unfortunately lop1.autonlab.org gateway was created at the time autofs
daemon was not used and the underlining OS doesn't support  it. That
effectively means that you can't log onto the lop1 as your home
directory is not mounted and that you have no choice but to use
bash.autonlab.org as the only shell gateway. Anybody whose home
directory is on zfsauton2 or zfsauton3 parent ZFS dataset is affected
about (80-90 users). Note that the members of Neill Group as well
people with home directories on zfsauton are not affected and still
can use lop1 gateway. Many people also have AutonLab issued desktops
and they don't need other shell gateways.

Replacing lop1.autounlab.org has been on my todo list for a while and
yesterday was suppose to be D day. However important security patches
came out as well as release of Alpine Linux 3.10.2 (our virtual OS of
choice) and I spent the day patching/upgrading bunch of servers as
oppose to provisioning new gateway.

This no longer can wait and I will provision new gateway hopefully
before the end of the next working day.

Best,
Predrag


On Thu, Aug 22, 2019 at 2:31 PM Shimeng Peng <shimengp at andrew.cmu.edu> wrote:
>
> Hi,I am unable to ssh to lop1, I always get connection closed when I try to remotely log on.
>
>
> Could you please help with figuring out it
>
>
> Thank you
>
> Shimeng
>
>