Re: NFS disconnects periodically
On Wed, Dec 15, 2004 at 10:21:29PM +0100, Ralf Gesel|ensetter wrote:
> Hi Finn-Arne,
>
> Am Mittwoch, 15. Dezember 2004 21:21 schrieb Finn-Arne Johansen:
> > ...
> [Snippet from my own posting]
>
> >> This issue seems to be connected to "Delay in LDAP lookups."
> >> http://www.openldap.org/lists/openldap-software/200307/msg00398.html
> >
> > Just curious - would it help to not use automounting from ldap ?
> > and not use netgroups, but hardcode the IP-adresses that are allowed
> > to mount over NFS? This will give the ldap server a lot less stress.
>
> Sounds like slapd is mostly occupied with looking up negroups?
> If you send some details on how to "hardcode" this, we could try. Also,
> we need to test if it might be a kernel issue - as the tjener running
> with a different version doesn't crash. Could everybody else, please,
> check?
How to disable automounting on the thinclient servers:
replace
AUTOFS_ENABLED=true
with
AUTOFS_ENABLED=false
in /etc/default/autofs
and in /etc/fstab, add an entry for home0 and others:
tjener:/skole/tjener/home0 /skole/tjener/home0 nfs defaults 0 0
and create /skole/tjener/home0.
But remember to remove /skole/tjener if you later decide to enable
autofs again.
how to hardcode which servers are allowed to mount NFS from tjener:
in /etc/exports replace
@ltsp-servers(rw)
with
10.0.2.10(rw)
I guess you may remove mount permissions from workstations and servers as well
> > But we really need to find out why nscd segfaults.
>
> Ack. The stated links says something like malconfigured reverse DNS ...?
what says
host 10.0.2.10 (if this is one of the servers you have problems with)
and what says hostname ?
> > Could it be that there is an error in the config-file for nscd ?
>
> Let me post our version:
>
> # /etc/nscd.conf
> # (omitting commented sample lines)
> # logfile /var/log/nscd.log
> # threads 6
> # server-user nobody
> # debug-level 0
>
> enable-cache passwd yes
> positive-time-to-live passwd 600
> negative-time-to-live passwd 20
> suggested-size passwd 211
I guess you have a lot more users than 211 ?
You had ~100 users, didn't you ?
and maybe you have som windows machine accounts as well ?
The I would have set suggested-size for passwd to 2211
The same applies to suggested_size for groups.
> check-files passwd yes
>
> enable-cache group yes
> positive-time-to-live group 3600
> negative-time-to-live group 60
> suggested-size group 211
> check-files group yes
>
> # !!!!!WARNING!!!!! Host cache is insecure!!! The mechanism in nscd to
> # cache hosts will cause your local system to not be able to trust
> # forward/reverse lookup checks DO NOT USE THIS if your system relies on
> # this sort of security mechanism. Use a caching DNS server instead.
> enable-cache hosts no
> positive-time-to-live hosts 3600
> negative-time-to-live hosts 20
> suggested-size hosts 211
> check-files hosts yes
>
>
> --
> To UNSUBSCRIBE, email to debian-edu-REQUEST@lists.debian.org
> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
>
--
Finn-Arne Johansen
faj@bzz.no
http://bzz.no/
Reply to: