Public bug reported:
This problem is occurring on Ubuntu 16.04 system where autofs and sssd
are both installed, sssd is configured to provide automount maps, and
nsswitch.conf directs autofs to use sssd. In a situation when both sssd
and autofs start before network is up (which happens out-of-the-box
because of bug 1588915), sssd is unable to obtain automount maps from
the LDAP server, nor any other data, and serves information from its
cache. Autofs does not appear to retrieve cached automount maps from
sssd, which can be verified with automount -m not showing any maps. This
is accompanied by an error in syslog: "setautomntent: lookup(sss):
setautomntent: No such file or directory". It goes without saying that
shares are not mounted either.
When network is finally up, sssd is able to connect to the LDAP server,
and autofs retrieves automount maps (automount -m now displays maps as
expected). However autofs does not attempt to mount shares specified by
these maps. Attempting to access these shares does not help; it is
necessary to manually restart autofs service.
Steps to reproduce:
1. Start the machine with network interfaces not configured (e.g. cables
unplugged).
2. Verify that sssd works and serves data (e.g. getent passwd, etc).
3. Check that autofs does not see maps and has not mounted shares: automount
-m, ls /shares/...
(Possibly) expected result: autofs obtains cached maps and mounts shares as
specified.
4. Plug network cable and configure the interface: ifup eth0
5. Verify that autofs now sees maps: automount -m
6. Check that shares specified in maps are still unmounted: ls /shares/...
Expected result: shares will now be mounted.
7. Restart autofs: systemctl restart autofs
8. Verify that shares are now mounted.
This is as expected, but step #7 shouldn't be necessary.
$ lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
$ apt-cache policy autofs sssd-ldap libpam-sss libnss-sss sssd-tools
autofs:
Installed: 5.1.1-1ubuntu3
sssd-ldap:
Installed: 1.13.4-1ubuntu1
libpam-sss:
Installed: 1.13.4-1ubuntu1
libnss-sss:
Installed: 1.13.4-1ubuntu1
sssd-tools:
Installed: 1.13.4-1ubuntu1
[Note: Package sssd is not installed, because it is a virtually empty package
that pulls a numbed of unneeded dependencies.]
** Affects: autofs (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1614282
Title:
autofs does not recover from failure to read maps on startup
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