In a network where an OpenAFS cell is set up to serve 1000+ clients, a
host would occasionally fail to change to a user's home directory upon
login with the following line in auth.log:
Jul 15 15:05:56 ia711225 sshd[10679]: (pam_afs_session): PAG creation failed:
No such file or directory
Simply typing aklog right after login successfully acquires tokens, and
the user is able to access their home directory. Subsequent logins have
no problem changing to the user's home directory for a while (perhaps
the Kerberos ticket lifetime). However, to make the problem go away
completely, I found no solution but to reboot the host.
The server is running Linux 2.6.32 and OpenAFS 1.4.12. The clients are
running Linux 2.6.35 and OpenAFS 1.4.12.1. And this is how
/etc/pam.d/common-session looks like:
session required pam_unix.so
session optional pam_krb5.so minimum_uid=1000
session optional pam_afs_session.so
I also had program=/usr/bin/aklog in the last line for a while, but the
problem still occured.
The line in auth.log above indicates that pam_afs_session complains
about a file that does not exist but does not tell what the name of that
file is. Any suggestions on how to better troubleshoot the problem are
appreciated.
--
Youssef Eldakar
Bibliotheca Alexandrina
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