[Freeipa-users] Synology DSM5 and freeIPA

Thu Mar 19 20:51:08 UTC 2015

Thanks, Jakub.

On 19 March 2015 at 21:23, Jakub Hrozek <jhrozek at redhat.com> wrote:

>
> > On 19 Mar 2015, at 21:18, Roberto Cornacchia <
> roberto.cornacchia at gmail.com> wrote:
> >
> > It's possible that I'm simply not getting the point, or that I don't
> understand the documentation correctly, but this is what I don't find clear:
> >
> > I had seen the instructions you pointed me at. These are not
> specifically about home directories.
> >
> > However, this section is:
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/Linux_Domain_Identity_Authentication_and_Policy_Guide/index.html#homedir-reqs
> >
> > It first suggests that automatic creation of home directories over NFS
> shares is possible: just automount /home and then use pam_oddjob_mkhomedir
> or pam_mkhomedir to create homedirs at first login.
> >
> > But then it also suggests that mounting the whole /home tree could be an
> issue, and says: "Use automount to mount only the user's home directory and
> only when the user logs in, rather than loading the entire /home tree."
> >
> > That means that automatic homedir creation is out of the game, doesn't
> it?
> >
> > That's what I find confusing. What's the recommended way?
> >
>
> It really depends on your environment. For your size, it's perfectly fine
> to NFS mount the whole /home tree and be done with it. Don't optimize
> prematurely :-)
>
> >
> >
> > On 19 March 2015 at 20:49, Dmitri Pal <dpal at redhat.com> wrote:
> > On 03/19/2015 02:46 PM, Roberto Cornacchia wrote:
> >> Hi Dmitri,
> >>
> >> I do realise my question is borderline and I accept that it is
> considered off-topic.
> >>
> >> I did post it here because I believe it's not *only* about NFS, but
> also about its interaction with freeIPA. The issue of NFS home and in
> particular about their creation is touched in all the links I posted (all
> about freeIPA) and never really answered.
> >>
> >
> > This is what documented and recommended:
> >
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/Linux_Domain_Identity_Authentication_and_Policy_Guide/index.html#kerb-nfs
> >
> > RHEL6 has a similar chapter in its doc set though books have changed
> significantly between 6 and 7.
> >
> > I do not see any chicken and egg problem there.
> > The instructions show how to create home dirs on the first login.
> >
> > It mounts the volume and then creates dirs on it as users log in if they
> are not already there.
> >
> > It is unclear what problem you see with doing it the way it is
> recommended.
> >
> >
> >
> >> Best,
> >> Roberto
> >>
> >> On 19 March 2015 at 19:36, Dmitri Pal <dpal at redhat.com> wrote:
> >> On 03/19/2015 05:29 AM, Roberto Cornacchia wrote:
> >>> On 6 March 2015 at 11:15, Martin Kosek <mkosek at redhat.com> wrote:
> >>> On 03/06/2015 10:56 AM, Roberto Cornacchia wrote:
> >>> Hi there,
> >>>
> >>> I'm planning to deploy freeIPA on our lan.
> >>> It's small-ish and completely based on FC21, so I expect everything to
> work
> >>> like a charm.
> >>>
> >>> Except one detail. We have Synology NAS station, which uses DSM 5.0.
> >>> The ideal plan is to use it as host for shared NFS home dirs once we
> switch our
> >>> desktops to freeIPA.
> >>>
> >>> Great!
> >>>
> >>>
> >>> Hello,
> >>>
> >>> The first thing I'm struggling  with is to find the correct approach
> about NFS home dirs.
> >>> The ideal setting would be:
> >>> - home dirs on the NAS
> >>> - IPA manages automount maps
> >>> - home dirs are created automatically at first login
> >>>
> >>> The documentation I could find on these topics includes only
> not-so-recent pages (anything I missed?):
> >>>
> >>> http://wiki.linux-nfs.org/wiki/index.php/NFS_and_FreeIPA
> >>>
> http://docs.fedoraproject.org/en-US/Fedora/18/html/FreeIPA_Guide/automount.html
> >>>
> http://docs.fedoraproject.org/en-US/Fedora/18/html/FreeIPA_Guide/users.html#home-directories
> >>>
> http://adam.younglogic.com/2011/06/automount-and-home-directory-creation/
> >>>
> >>> Now, I admit I don't have much experience with setting up NFS homes,
> with or without freeIPA, so trying to get this done correctly in the
> context of freeIPA and without clear howtos isn't very easy, but I'm
> willing to get my hands dirty.
> >>>
> >>> The first problem I struggle with is on the correct approach.
> >>> From the documentation above, I understand that there is a bit of a
> chicken-egg problem about the creation of home dirs.
> >>> On the one hand, it would be optimal to have automount maps to load
> only single home dirs on demand, rather than the entire /home tree.
> >>> On the other hand, if the /home tree is not available, then creating
> /home/user1 dir automatically isn't really possible.
> >>>
> >>> Just mounting the whole /home tree would make things easier, but I
> don't have a feeling of when it starts to become a performance issue
> (assuming recent hardware and up to date software). 10 users? 50? 100? 500?
> No idea.
> >>> The realm I'm dealing with at the moment is in the range of 5-10 users
> and probably won't be larger than 50 in the next few years (and if it will,
> it means things are going well, so what the heck ;)
> >>> Also true that, with such few users, I could just create the homedirs
> manually when needed (this is not an organisation where many users come and
> go) and just mount the individually.
> >>> Any tips about this?
> >>>
> >>> Best, Roberto
> >>>
> >>>
> >>>
> >>>
> >> Some of these questions are really outside the scope of this list.
> >> You might consider asking them on the NFS list.
> >>
> >> --
> >> Thank you,
> >> Dmitri Pal
> >>
> >> Sr. Engineering Manager IdM portfolio
> >> Red Hat, Inc.
> >>
> >>
> >> --
> >> Manage your subscription for the Freeipa-users mailing list:
> >> https://www.redhat.com/mailman/listinfo/freeipa-users
> >> Go to http://freeipa.org for more info on the project
> >>
> >>
> >>
> >
> >
> > --
> > Thank you,
> > Dmitri Pal
> >
> > Sr. Engineering Manager IdM portfolio
> > Red Hat, Inc.
> >
> >
> > --
> > Manage your subscription for the Freeipa-users mailing list:
> > https://www.redhat.com/mailman/listinfo/freeipa-users
> > Go to http://freeipa.org for more info on the project
> >
> > --
> > Manage your subscription for the Freeipa-users mailing list:
> > https://www.redhat.com/mailman/listinfo/freeipa-users
> > Go to http://freeipa.org for more info on the project
>
>
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