On 03.12.2021 01:12, Ryan Cox wrote:
Adrian,
Hi!
We haven't played with that yet, but we have been using pam_namespace.so for many years for the same purpose. We do
this at startup:
mkdir -pm 000 /tmp/userns
mkdir -pm 000 /dev/shm/userns
mount --make-shared /
mount --bind /tmp /tmp
mount --make-private /tmp
mount --bind /dev/shm /dev/shm
mount --make-private /dev/shm
ooh, bind in local space .. that's a nice idea
thank you so much for info!!! now i have again a little bit of hope :)
This solved our automounting problems. There might have been some updates to the "right" way to do things since we
started doing it this way, but this still works for us. Basically, we make *everything* shared first then make /tmp and
/dev/shm private.
yeah, the problem that hit me is that autofs reset the basepath attributes ..
so, i have a base path of /cvmfs where automount mount things .. at any autofs
action
even if i do mount --make-rshared /cvmfs, this will be reset when autofs acts
on /cvmfs
with job_container.conf slurmstepd creates a namespace with private /tmp and
/dev/shm
and i was struggling with the idea of adding the external /cvmfs into this ns ..
lets see how it goes, if autofs will mount stuff if i bind in job ns the /cvmfs
(that i make rshared)
Thanks a lot!!!
Adrian
https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt has more
info on the options.
Ryan
On 12/2/21 15:58, Adrian Sevcenco wrote:
Hi! I have a annoying problem with the namespaces and the shared attribute
of an autofs mountpoint...
so, there is a directory named /cvmfs where autofs will mount various
directories
depending of the job requests.
these directories, named repositories they do not need to be defined, regardless
of the settings a job can request for mount any repository present on the
defined upstream
(stratum-1) servers.
my problems is that, at any point before the actual job, if a apply a
--make-rshared
on /cvmfs, autofs when will mount something within will reset this attribute.
is there a way to tell slurmstepd to somehow adopt and keep this mountpoint no
matter
what is mounted within?
Thank you!
Adrian
