[Bug 1566508] Re: autofs races with sssd on startup

[Alvin Cura]

Having this problem with freeipa on xenial.

ii  sssd-ipa  1.13.4-1ubuntu1.8
amd64System Security Services Daemon -- IPA back end

--- client side output ---
alvinc@ipa-client-02:~$ sudo systemctl restart autofs
[sudo] password for alvinc: 
alvinc@ipa-client-02:~$ sudo ls -Fla /nethome/acura
ls: cannot access '/nethome/acura': No such file or directory

--- client side syslog ---
Oct 10 07:26:45 ipa-client-02 systemd[1]: Stopping LSB: Automounts filesystems 
on demand...
Oct 10 07:26:45 ipa-client-02 autofs[4315]:  * Stopping automount...
Oct 10 07:26:45 ipa-client-02 autofs[4315]:...done.
Oct 10 07:26:45 ipa-client-02 systemd[1]: Stopped LSB: Automounts filesystems 
on demand.
Oct 10 07:26:45 ipa-client-02 systemd[1]: Starting LSB: Automounts filesystems 
on demand...
Oct 10 07:26:45 ipa-client-02 autofs[4322]:  * Starting automount...
Oct 10 07:26:45 ipa-client-02 automount[4332]: setautomntent: lookup(sss): 
setautomntent: No such file or directory
Oct 10 07:26:45 ipa-client-02 autofs[4322]:...done.
Oct 10 07:26:45 ipa-client-02 systemd[1]: Started LSB: Automounts filesystems 
on demand.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags added: verification-done-xenial

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags removed: verification-done
** Tags added: verification-done-trusty

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

This bug was fixed in the package sssd - 1.11.8-0ubuntu0.7

---
sssd (1.11.8-0ubuntu0.7) trusty; urgency=medium

  * Fix regression where SSSD doesn't start on boot if autofs is not
installed (LP: #1695870):
- rules: Support new service
- sssd-common.sssd-autofs.upstart.in: Restart autofs to read direct mounts
after SSSD and autofs have started (only on startup). This keeps the fix
for the autofs and SSSD race condition (LP: #1566508)
- sssd-common.sssd.upstart.in: Remove "starting autofs" to allow SSSD to
start without autofs.

 -- Victor Tapia   Mon, 05 Jun 2017 12:41:12
+0200

** Changed in: sssd (Ubuntu Trusty)
   Status: In Progress => Fix Released

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags removed: verification-needed
** Tags added: verification-done

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

# VERIFICATION FOR TRUSTY (LP#1566508)

- Version of the package: 1.11.8-0ubuntu0.7

$ ssh vtapia-trusty "dpkg -l | grep -i sssd"
Warning: Permanently added 'vtapia-trusty,10.5.1.100' (ECDSA) to the list of 
known hosts.
ii  libsss-idmap0 1.11.8-0ubuntu0.7 
 amd64ID mapping library for SSSD
ii  sssd  1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- metapackage
ii  sssd-ad   1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- Active Directory back end
ii  sssd-ad-common1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- PAC responder
ii  sssd-common   1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- common files
ii  sssd-ipa  1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- IPA back end
ii  sssd-krb5 1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- Kerberos back end
ii  sssd-krb5-common  1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- Kerberos helpers
ii  sssd-ldap 1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- LDAP back end
ii  sssd-proxy1.11.8-0ubuntu0.7 
 amd64System Security Services Daemon -- proxy back end


- Using the following script to confirm that the direct mountpoints are 
available after a reboot:

#!/bin/bash
OK=0
KO=0
while true ; do
VM="vtapia-trusty"
nova reboot ${VM}
sleep 40
nc -z cases 22 || sleep 20
ssh -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes 
ubuntu@${VM} "tail /var/log/syslog -n200 | grep -Ei 'autofs|automount|sssd' | 
grep -v apparmor && ls /direct/ok"

if [ $? != 0 ] ; then
KO=$((KO + 1))
break
else
OK=$((OK + 1))
fi
echo "$OK $KO"
done


- The output shows 256 reboots without the race condition:

Warning: Permanently added 'vtapia-trusty,10.5.1.100' (ECDSA) to the list of 
known hosts.
Jun  6 10:10:35 vtapia-trusty sssd: Starting up
Jun  6 10:10:35 vtapia-trusty sssd[be[openstacklocal]]: Starting up
Jun  6 10:10:35 vtapia-trusty sssd[pam]: Starting up
Jun  6 10:10:35 vtapia-trusty sssd[autofs]: Starting up
Jun  6 10:10:35 vtapia-trusty sssd[nss]: Starting up
/direct/ok
256 0

- And to confirm, here's the output of running "mount" and "ls /direct""

ubuntu@vtapia-bastion:~/cases/sf00098162$ ssh vtapia-trusty "ls -acl /direct/; 
mount |grep nfs" 
Warning: Permanently added 'vtapia-trusty,10.5.1.100' (ECDSA) to the list of 
known hosts.
total 8
drwxr-xr-x  2 ubuntu ubuntu 4096 May 30  2016 .
drwxr-xr-x 24 root   root   4096 Jun  6 10:21 ..
-rw-rw-r--  1 ubuntu ubuntu0 May 30  2016 ok
nfs.cloud.sts:/home/ubuntu on /home/ubuntu type nfs 
(rw,nosuid,nodev,hard,intr,sloppy,vers=4,addr=10.5.1.84,clientaddr=10.5.1.100)
nfs.cloud.sts:/export/direct on /direct type nfs 
(rw,nosuid,nodev,hard,intr,rsize=8192,wsize=8192,sloppy,addr=10.5.1.84)

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[Bug 1566508] Re: autofs races with sssd on startup

[Timo Aaltonen]

reopening for trusty, since this fix regressed non-autofs case

** Changed in: sssd (Ubuntu Trusty)
   Status: Fix Released => In Progress

** Tags removed: verification-done
** Tags added: verification-needed

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

LP #1695870 will address this regression

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[Bug 1566508] Re: autofs races with sssd on startup

[Stephane Chazelas]

The fix in 14.04 causes sssd to not start on boot when "autofs" is not
installed!

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

This bug was fixed in the package sssd - 1.11.8-0ubuntu0.6

---
sssd (1.11.8-0ubuntu0.6) trusty; urgency=medium

  * d/p/pidfile-creation.diff: Delay the pidfile creation until the
responders are up (LP: #1566508)
  * d/p/sanitize_newline.diff: Sanitize newline and carriage return
characters before LDAP queries. (LP: #1669712)

 -- Victor Tapia   Fri, 24 Mar 2017 11:26:41
+0100

** Changed in: sssd (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

#VERIFICATION FOR TRUSTY (1.11.8-0ubuntu0.6)

Script from #46, excerpt of the logs:

Warning: Permanently added 'vtapia-trusty,10.5.1.100' (ECDSA) to the list of 
known hosts.
May 25 15:46:01 vtapia-trusty sssd: Starting up
May 25 15:46:01 vtapia-trusty sssd[be[openstacklocal]]: Starting up
May 25 15:46:02 vtapia-trusty sssd[nss]: Starting up
May 25 15:46:02 vtapia-trusty sssd[pam]: Starting up
May 25 15:46:02 vtapia-trusty sssd[autofs]: Starting up
May 25 15:46:02 vtapia-trusty automount[1167]: Starting automounter version 
5.0.7, master map /etc/auto.master
May 25 15:46:02 vtapia-trusty automount[1167]: using kernel protocol version 
5.02
May 25 15:46:02 vtapia-trusty automount[1167]: mounted direct on /direct with 
timeout 300, freq 75 seconds
May 25 15:46:02 vtapia-trusty automount[1167]: mounted indirect on /home with 
timeout 300, freq 75 seconds
May 25 15:47:30 vtapia-trusty automount[1167]: attempting to mount entry 
/home/ubuntu
/direct/ok
3983 0

3983 Reboots, 0 issues.

ubuntu@vtapia-trusty:~$ dpkg -l | grep sssd
ii  sssd  1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- metapackage
ii  sssd-ad   1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- Active Directory back end
ii  sssd-ad-common1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- PAC responder
ii  sssd-common   1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- common files
ii  sssd-ipa  1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- IPA back end
ii  sssd-krb5 1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- Kerberos back end
ii  sssd-krb5-common  1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- Kerberos helpers
ii  sssd-ldap 1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- LDAP back end
ii  sssd-proxy1.11.8-0ubuntu0.6amd64
System Security Services Daemon -- proxy back end



** Tags removed: verification-done-xenial verification-done-yakkety 
verification-needed
** Tags added: verification-done

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[Bug 1566508] Re: autofs races with sssd on startup

[Andy Whitcroft]

Hello Maciej, or anyone else affected,

Accepted sssd into trusty-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/sssd/1.11.8-0ubuntu0.6
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: sssd (Ubuntu Trusty)
   Status: In Progress => Fix Committed

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

This bug was fixed in the package sssd - 1.13.4-3ubuntu0.4

---
sssd (1.13.4-3ubuntu0.4) yakkety; urgency=medium

  * d/p/pidfile-creation.diff: Delay the pidfile creation until the
responders are up (LP: #1566508)
  * d/p/sanitize_newline.diff: Sanitize newline and carriage return
characters before LDAP queries. (LP: #1669712)

 -- Victor Tapia   Fri, 24 Mar 2017 11:14:10
+0100

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

This bug was fixed in the package sssd - 1.13.4-1ubuntu1.5

---
sssd (1.13.4-1ubuntu1.5) xenial; urgency=medium

  * d/p/pidfile-creation.diff: Delay the pidfile creation until the
responders are up (LP: #1566508)
  * d/p/sanitize_newline.diff: Sanitize newline and carriage return
characters before LDAP queries. (LP: #1669712)

 -- Victor Tapia   Tue, 24 Mar 2017 11:20:32
+0100

** Changed in: sssd (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

** Changed in: sssd (Ubuntu Yakkety)
   Status: Fix Committed => Fix Released

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

#VERIFICATION FOR YAKKETY (1.13.4-3ubuntu0.4)

Script from #46, excerpt of the logs:

May  3 16:04:37 vtapia-yakkety sssd: Starting up
May  3 16:04:37 vtapia-yakkety sssd[be[openstacklocal]]: Starting up
May  3 16:04:38 vtapia-yakkety sssd[pam]: Starting up
May  3 16:04:38 vtapia-yakkety sssd[autofs]: Starting up
May  3 16:04:38 vtapia-yakkety sssd[nss]: Starting up
May  3 16:04:38 vtapia-yakkety systemd[1]: Starting LSB: Automounts filesystems 
on demand...
May  3 16:04:38 vtapia-yakkety autofs[1691]:  * Starting automount...
May  3 16:04:38 vtapia-yakkety automount[1726]: Starting automounter version 
5.1.1, master map /etc/auto.master
May  3 16:04:38 vtapia-yakkety automount[1726]: using kernel protocol version 
5.02
May  3 16:04:38 vtapia-yakkety automount[1726]: mounted direct on /wololo with 
timeout 300, freq 75 seconds
May  3 16:04:38 vtapia-yakkety automount[1726]: mounted direct on /direct with 
timeout 300, freq 75 seconds
May  3 16:04:38 vtapia-yakkety automount[1726]: mounted indirect on /home with 
timeout 300, freq 75 seconds
May  3 16:04:38 vtapia-yakkety autofs[1691]:...done.
May  3 16:04:38 vtapia-yakkety systemd[1]: Started LSB: Automounts filesystems 
on demand.
May  3 16:05:50 vtapia-yakkety automount[1726]: attempting to mount entry 
/home/ubuntu
May  3 16:05:51 vtapia-yakkety automount[1726]: mounted /home/ubuntu
/direct/ok
2420 0

2420 Reboots, 0 issues.

ubuntu@vtapia-yakkety:~$ dpkg -l | grep sssd-common
ii  sssd-common1.13.4-3ubuntu0.4
amd64System Security Services Daemon -- common files



** Tags removed: verification-failed-xenial verification-failed-yakkety
** Tags added: verification-done-xenial verification-done-yakkety

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

Sorry, I meant 1.13.4-1ubuntu1.5 for Xenial:

ubuntu@vtapia-xenial:~$ dpkg -l | grep sssd-common
ii  sssd-common   1.13.4-1ubuntu1.5 
 amd64System Security Services Daemon -- common files

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

#VERIFICATION FOR XENIAL (1.13.4-3ubuntu0.4)

Using the script in comment #46, I've had the machine rebooting for
several days without hitting the issue. This is an excerpt of the logs:

Warning: Permanently added 'vtapia-xenial,10.5.1.88' (ECDSA) to the list of 
known hosts.
May  3 16:00:39 vtapia-xenial dhclient[799]: DHCPDISCOVER on ens3 to 
255.255.255.255 port 67 interval 3 (xid=0x5d24d577)
May  3 16:00:39 vtapia-xenial sh[776]: DHCPDISCOVER on ens3 to 255.255.255.255 
port 67 interval 3 (xid=0x5d24d577)
May  3 16:00:39 vtapia-xenial dhclient[799]: DHCPREQUEST of 10.5.1.88 on ens3 
to 255.255.255.255 port 67 (xid=0x77d5245d)
May  3 16:00:39 vtapia-xenial sh[776]: DHCPREQUEST of 10.5.1.88 on ens3 to 
255.255.255.255 port 67 (xid=0x77d5245d)
May  3 16:00:39 vtapia-xenial dhclient[799]: DHCPOFFER of 10.5.1.88 from 
10.5.1.102
May  3 16:00:39 vtapia-xenial sh[776]: DHCPOFFER of 10.5.1.88 from 10.5.1.102
May  3 16:00:39 vtapia-xenial dhclient[799]: DHCPACK of 10.5.1.88 from 
10.5.1.102
May  3 16:00:39 vtapia-xenial sh[776]: DHCPACK of 10.5.1.88 from 10.5.1.102
May  3 16:00:39 vtapia-xenial root: /etc/dhcp/dhclient-enter-hooks.d/samba 
returned non-zero exit status 1
May  3 16:00:39 vtapia-xenial sssd: Starting up
May  3 16:00:39 vtapia-xenial sssd[be[openstacklocal]]: Starting up
May  3 16:00:40 vtapia-xenial sssd[autofs]: Starting up
May  3 16:00:40 vtapia-xenial sssd[nss]: Starting up
May  3 16:00:40 vtapia-xenial sssd[pam]: Starting up
May  3 16:00:40 vtapia-xenial systemd[1]: Starting LSB: Automounts filesystems 
on demand...
May  3 16:00:40 vtapia-xenial autofs[1149]:  * Starting automount...
May  3 16:00:40 vtapia-xenial automount[1181]: Starting automounter version 
5.1.1, master map /etc/auto.master
May  3 16:00:40 vtapia-xenial automount[1181]: using kernel protocol version 
5.02
May  3 16:00:40 vtapia-xenial automount[1181]: mounted direct on /direct with 
timeout 300, freq 75 seconds
May  3 16:00:40 vtapia-xenial automount[1181]: mounted indirect on /home with 
timeout 300, freq 75 seconds
May  3 16:00:40 vtapia-xenial autofs[1149]:...done.
May  3 16:00:40 vtapia-xenial systemd[1]: Started LSB: Automounts filesystems 
on demand.
May  3 16:01:55 vtapia-xenial automount[1181]: attempting to mount entry 
/home/ubuntu
May  3 16:01:55 vtapia-xenial automount[1181]: mounted /home/ubuntu
/direct/ok
4689 0

>From a total number of 4689 reboots, 0 have failed

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[Bug 1566508] Re: autofs races with sssd on startup

[Łukasz Zemczak]

I will be accepting the latest upload to -proposed but please be sure to
include *all* changes mentioned in the debian/changelog. One of the
previous uploads was missing the mention of the sssd-
common.sssd.upstart.in file being changed - this should be mentioned
along with the patch name.

** Tags added: verification-needed

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags removed: verification-failed
** Tags added: verification-failed-xenial verification-failed-yakkety

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags removed: verification-done-xenial verification-done-yakkety 
verification-needed
** Tags added: verification-failed

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[Bug 1566508] Re: autofs races with sssd on startup

[mush]

I tested sssd-1.13.4-1ubuntu1.4, and after several reboot on xenial
distro I can confirm that the bug is fixed.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

# VERIFICATION FOR YAKKETY

Using the same script for Yakkety, I can confirm that the fix works as
expected. This is the log after 1300 succesful reboots:

Warning: Permanently added 'vtapia-yakkety,10.5.1.90' (ECDSA) to the list of 
known hosts.
Mar 31 08:40:31 vtapia-yakkety systemd[1]: Started LSB: automatic crash report 
generation.
Mar 31 08:40:32 vtapia-yakkety sssd: Starting up
Mar 31 08:40:32 vtapia-yakkety sssd[be[openstacklocal]]: Starting up
Mar 31 08:40:33 vtapia-yakkety sssd[pam]: Starting up
Mar 31 08:40:33 vtapia-yakkety sssd[autofs]: Starting up
Mar 31 08:40:33 vtapia-yakkety sssd[nss]: Starting up
Mar 31 08:40:33 vtapia-yakkety autofs[1714]:  * Starting automount...
Mar 31 08:40:33 vtapia-yakkety automount[1799]: Starting automounter version 
5.1.1, master map /etc/auto.master
Mar 31 08:40:33 vtapia-yakkety automount[1799]: using kernel protocol version 
5.02
Mar 31 08:40:34 vtapia-yakkety automount[1799]: mounted direct on /wololo with 
timeout 300, freq 75 seconds
Mar 31 08:40:34 vtapia-yakkety automount[1799]: mounted direct on /direct with 
timeout 300, freq 75 seconds
Mar 31 08:40:34 vtapia-yakkety automount[1799]: mounted indirect on /home with 
timeout 300, freq 75 seconds
Mar 31 08:40:34 vtapia-yakkety autofs[1714]:...done.
/direct/ok
1300 0

** Tags added: verification-done-yakkety

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

I tested sssd-1.13.4-1ubuntu1.4 on xenial on a bare metal machine
equipped with Intel X550T, a network controller notorious for long and
somewhat random startup initialization time. I am happy to report that
autofs boot problems still occur, but at a much diminished rate. While
previously autofs was failing at nearly every boot, now I observed only
one failure in 50 tries. I believe that this improvement comes from
"autofs.service" being added to "Before" line in sssd.service file (a
change introduced in sssd-1.13.4-1ubuntu1.4). When I removed this
modification, autofs tended to start before sssd, and failed much more
often with an error "setautomntent: lookup(sss): setautomntent:
Connection refused". On the other hand, with the modification in place,
the very occasional failures were accompanied with an error
"setautomntent: lookup(sss): setautomntent: No such file or directory",
which results from network interface coming online after sssd and autofs
have already started. However, the topic of this bug is a race between
sssd and autofs, and not the race between sssd and autofs on one side,
and network initialization on the other (bug 1588915), even though
effects are similar. Thus I would vote to consider this bug fixed.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

# VERIFICATION FOR XENIAL

I prepared a reproducer based on the description details (LDAP + NFS)
using an entry_cache_timeout of 88000 in sssd.conf to ensure the cache
was valid during the validation run. From a remote machine, I ran this
script:


#!/bin/bash
OK=0
KO=0
while true ; do
#date
nova reboot vtapia-xenial
sleep 60
nc -z cases 22 || sleep 30
ssh -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes 
ubuntu@vtapia-xenial "tail /var/log/syslog -n200 | grep -Ei 
'DHCP|autofs|automount|sssd' | grep -v apparmor && ls /direct/ok"
if [ $? != 0 ] ; then
KO=$((KO + 1))
break
else
OK=$((OK + 1))
fi
echo "$OK $KO"
done 


This script reboots the machine using sssd and tries to access a direct mapping 
(/direct/). If the boot order is successful (i.e. autofs starts after sssd and 
its responders have started), the mapping will be available and the file in it 
("ok") will be too. If the test passes, the machine is restarted and checked 
again.


This is an excerpt of the output: 

Warning: Permanently added 'vtapia-xenial,10.5.1.88' (ECDSA) to the list of 
known hosts.
Mar 30 13:31:41 vtapia-xenial dhclient[780]: DHCPDISCOVER on ens3 to 
255.255.255.255 port 67 interval 3 (xid=0xe1d78e6a)
Mar 30 13:31:41 vtapia-xenial dhclient[780]: DHCPREQUEST of 10.5.1.88 on ens3 
to 255.255.255.255 port 67 (xid=0x6a8ed7e1)
Mar 30 13:31:41 vtapia-xenial sh[767]: DHCPREQUEST of 10.5.1.88 on ens3 to 
255.255.255.255 port 67 (xid=0x6a8ed7e1)
Mar 30 13:31:41 vtapia-xenial sh[767]: DHCPOFFER of 10.5.1.88 from 10.5.1.102
Mar 30 13:31:41 vtapia-xenial dhclient[780]: DHCPOFFER of 10.5.1.88 from 
10.5.1.102
Mar 30 13:31:41 vtapia-xenial dhclient[780]: DHCPACK of 10.5.1.88 from 
10.5.1.102
Mar 30 13:31:41 vtapia-xenial sh[767]: DHCPACK of 10.5.1.88 from 10.5.1.102
Mar 30 13:31:41 vtapia-xenial root: /etc/dhcp/dhclient-enter-hooks.d/samba 
returned non-zero exit status 1
Mar 30 13:31:41 vtapia-xenial sssd: Starting up
Mar 30 13:31:41 vtapia-xenial sssd[be[openstacklocal]]: Starting up
Mar 30 13:31:41 vtapia-xenial sssd[autofs]: Starting up
Mar 30 13:31:41 vtapia-xenial sssd[nss]: Starting up
Mar 30 13:31:41 vtapia-xenial sssd[pam]: Starting up
Mar 30 13:31:41 vtapia-xenial systemd[1]: Starting LSB: Automounts filesystems 
on demand...
Mar 30 13:31:41 vtapia-xenial autofs[1143]:  * Starting automount...
Mar 30 13:31:41 vtapia-xenial automount[1171]: Starting automounter version 
5.1.1, master map /etc/auto.master
Mar 30 13:31:41 vtapia-xenial automount[1171]: using kernel protocol version 
5.02
Mar 30 13:31:42 vtapia-xenial automount[1171]: mounted direct on /wololo with 
timeout 300, freq 75 seconds
Mar 30 13:31:42 vtapia-xenial automount[1171]: mounted direct on /direct with 
timeout 300, freq 75 seconds
Mar 30 13:31:42 vtapia-xenial automount[1171]: mounted indirect on /home with 
timeout 300, freq 75 seconds
Mar 30 13:31:42 vtapia-xenial autofs[1143]:...done.
Mar 30 13:31:42 vtapia-xenial systemd[1]: Started LSB: Automounts filesystems 
on demand.
Mar 30 13:32:56 vtapia-xenial automount[1171]: attempting to mount entry 
/home/ubuntu
Mar 30 13:32:56 vtapia-xenial automount[1171]: mounted /home/ubuntu
/direct/ok
1815 0


The log shows that the machine has restarted 1815 times with no errors, so we 
can assume the bug has been fixed.


The tested versions are:

$ ssh vtapia-xenial "dpkg -l | grep sssd"
Warning: Permanently added 'vtapia-xenial,10.5.1.88' (ECDSA) to the list of 
known hosts.
ii  sssd  1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- metapackage
ii  sssd-ad   1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- Active Directory back end
ii  sssd-ad-common1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- PAC responder
ii  sssd-common   1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- common files
ii  sssd-ipa  1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- IPA back end
ii  sssd-krb5 1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- Kerberos back end
ii  sssd-krb5-common  1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- Kerberos helpers
ii  sssd-ldap 1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- LDAP back end
ii  sssd-proxy1.13.4-1ubuntu1.4 
 amd64System Security Services Daemon -- proxy back end



Note: This would be the output of a failing boot process:

Warning: Permanently added 'vtapia-xenial,10.5.1.88' (ECDSA) to the list of 
known hosts.
Mar 22 10:00:24 vtapia-xenial systemd[1]: Starting LSB: Automounts filesystems 
on demand...

[Bug 1566508] Re: autofs races with sssd on startup

[Timo Aaltonen]

Hello Maciej, or anyone else affected,

Accepted sssd into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/sssd/1.13.4-1ubuntu1.4
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Tags removed: verification-failed

** Tags added: verification-needed

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[Bug 1566508] Re: autofs races with sssd on startup

[Edward Hope-Morley]

** Tags removed: sts-sru
** Tags added: sts-sru-needed

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

Hi Maciej,

After a verification run, I can confirm that it still fails for . I'll
update my fixes and upload them again.


** Tags removed: verification-needed
** Tags added: verification-failed

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[Bug 1566508] Re: autofs races with sssd on startup

[Louis Bouchard]

** Changed in: sssd (Ubuntu Trusty)
   Status: New => In Progress

** Tags removed: sts-sponsor

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Here are the results on my tests of package sssd-1.13.4-1ubuntu1.3 on
Xenial.

As I noted in comment #20, this bug report involves two separate issues, both 
contributing to failure of autofs to properly start on boot:
1. autofs starts before sssd.
2. autofs starts after sssd, but before sssd responders are up.

On Trusty I observed both issues, and on Xenial only issue #1 (contrary
to my previous comment #20, I did observe this issue in further tests).
As I understand, the new version of the package deals with issue #2.
Since I never experienced this issue on Xenial, despite numerous tests
intended to reproduce it, and the issue #1 remains unfixed, I can only
say that changes introduced in sssd-1.13.4-1ubuntu1.3 have no effect in
the configuration that I used for my Xenial test system. However, I a
weary from changing the tag to verification-failed, as a fix to "what
ain't broke" is neither a success nor a failure.

This does not mean that the fixes are not valid, and in fact I think
they may have positive effect in Trusty. As I understand, the fixed
package for Trusty has not yet been released.

I did not test the package in Yakkety, as I do not use non-LTS Ubuntu
versions. I would be grateful if Yakkety users could test the package.

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

I did brief testing of sssd-1.13.4-1ubuntu1.3 on Xenial. Autofs still
fails to properly start on boot, but I am not sure which of the numerous
issues described in this bug report contributes to the failure now. I
will do more testing after the weekend.

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[Bug 1566508] Re: autofs races with sssd on startup

[Timo Aaltonen]

Hello Maciej, or anyone else affected,

Accepted sssd into yakkety-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/sssd/1.13.4-3ubuntu0.2
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: sssd (Ubuntu Yakkety)
   Status: New => Fix Committed

** Tags added: verification-needed

** Changed in: sssd (Ubuntu Xenial)
   Status: New => Fix Committed

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Changed in: sssd (Ubuntu Trusty)
 Assignee: (unassigned) => Victor Tapia (vtapia)

** Changed in: sssd (Ubuntu Xenial)
 Assignee: (unassigned) => Victor Tapia (vtapia)

** Changed in: sssd (Ubuntu Yakkety)
 Assignee: (unassigned) => Victor Tapia (vtapia)

** Changed in: sssd (Ubuntu Yakkety)
   Importance: Undecided => Medium

** Changed in: sssd (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: sssd (Ubuntu Trusty)
   Importance: Undecided => Medium

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[Bug 1566508] Re: autofs races with sssd on startup

[Brian Murray]

** Also affects: sssd (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: sssd (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: sssd (Ubuntu Yakkety)
   Importance: Undecided
   Status: New

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch removed: "yakkety_sssd_1.13.4-3ubuntu1.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811489/+files/yakkety_sssd_1.13.4-3ubuntu1.debdiff

** Patch removed: "trusty_sssd_1.11.8-0ubuntu0.4.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811490/+files/trusty_sssd_1.11.8-0ubuntu0.4.debdiff

** Patch removed: "xenial_sssd_1.13.4-1ubuntu1.2.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811491/+files/xenial_sssd_1.13.4-1ubuntu1.2.debdiff

** Patch added: "xenial-sssd_1.13.4-1ubuntu1.3.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4832798/+files/xenial-sssd_1.13.4-1ubuntu1.3.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch added: "yakkety-sssd_1.13.4-3ubuntu0.2.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4832800/+files/yakkety-sssd_1.13.4-3ubuntu0.2.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch added: "trusty-sssd_1.11.8-0ubuntu0.6.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4832799/+files/trusty-sssd_1.11.8-0ubuntu0.6.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[quess]

For Ubuntuers dummies like me :)
activate xenial-proposed via https://wiki.ubuntu.com/Testing/EnableProposed to 
install sssd_1.13.4-1ubuntu1.2 on xenial

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[Bug 1566508] Re: autofs races with sssd on startup

[quess]

Hi

sorry for my lack of knowledge, but regarding comment #32, I'm waiting for a 
fix in xenial repo.
It's seems to be present on the server 
(http://fr.archive.ubuntu.com/ubuntu/pool/main/s/sssd/sssd_1.13.4-1ubuntu1.2_amd64.deb),
 but probably not in the index of the mirror...

When will it be available on a regular update process?

Best regards,

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

This bug was fixed in the package sssd - 1.15.0-3ubuntu1

---
sssd (1.15.0-3ubuntu1) zesty; urgency=medium

  * Build without the secrets service as libhttp-parser2.1 is in universe. An
MIR is pending in LP 1638957; when this is complete, we can revert this.
- Configure with --without-secrets.
- Drop build depends on libhttp-parser-dev and libjansson-dev. These are
  only needed for the "secrets service".
- Remove secrets service -related files from d/sssd-common.install and in
  d/rules.

 -- Robie Basak   Tue, 07 Feb 2017 19:37:45
+

** Changed in: sssd (Ubuntu)
   Status: In Progress => Fix Released

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch added: "trusty_sssd_1.11.8-0ubuntu0.4.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811490/+files/trusty_sssd_1.11.8-0ubuntu0.4.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[Rafael David Tinoco]

** Tags added: sts-sponsor sts-sru

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch added: "xenial_sssd_1.13.4-1ubuntu1.2.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811491/+files/xenial_sssd_1.13.4-1ubuntu1.2.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Patch added: "yakkety_sssd_1.13.4-3ubuntu1.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4811489/+files/yakkety_sssd_1.13.4-3ubuntu1.debdiff

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[Bug 1566508] Re: autofs races with sssd on startup

[Rafael David Tinoco]

** No longer affects: autofs (Ubuntu)

** Changed in: sssd (Ubuntu)
   Importance: Undecided => Critical

** Changed in: sssd (Ubuntu)
   Importance: Critical => Medium

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Description changed:

+ [Impact]
+ 
+  * SSSD is set as started before its responders are active. 
+  * Depending services (e.g. autofs) start before those responders are 
working, and a manual restart is required to make them work after boot
+  * This happens with upstart and, with less frequence, systemd 
+ 
+ [Test Case]
+ 
+  * Configure an LDAP server containing the direct mappings for autofs
+  * Configure SSSD to read from that LDAP server
+  * Add ‘automount: sss’ to /etc/nsswitch.conf
+  * Reboot the machine, login, and try reading the contents of a direct 
mapping.
+  * If the environment has booted correctly the mapping will be available. 
Otherwise, it will not.
+ 
+ [Regression Potential]
+ 
+  * This is a cherry-pick from an upstream fix
+  * sssd could not start automatically
+ 
+ [Other Info]
+  
+  * Upstream commit: 
https://git.fedorahosted.org/cgit/sssd.git/commit/?id=d4063e9a21a4e203bee7e0a0144fa8cabb14cc46
+ 
+ 
+ [Original Description]
+ 
  This report concerns a configuration where autofs and sssd are both
  installed, sssd is configured to provide automount maps, and
  nsswitch.conf directs autofs to use sssd. In such a configuration autofs
  often fails on boot complaining "no mounts in table". This is because
  autofs may be started before sssd, or after sssd is started but before
  its autofs support is ready. If this happens, one can restart autofs and
  it will work fine.
  
  This bug affects other users:
  * Bug 40189 "autofs needs to be restarted to pick up some shares" - a very 
old bug with invalid status, but see last comment #46, complaining about Ubuntu 
trusty: https://bugs.launchpad.net/ubuntu/+source/autofs/+bug/40189/comments/46
  * Link to SSSD-users mailing list, also complaining about Ubuntu trusty: 
https://lists.fedorahosted.org/pipermail/sssd-users/2015-July/003166.html
  
  $ lsb_release -rd
  Description:Ubuntu 14.04.4 LTS
  Release:14.04
  
  $ apt-cache policy autofs sssd
  autofs:
-   Installed: 5.0.7-3ubuntu3.2
+   Installed: 5.0.7-3ubuntu3.2
  sssd:
-   Installed: 1.11.5-1ubuntu3
+   Installed: 1.11.5-1ubuntu3
  
  $ uname -a
  Linux  3.13.0-83-generic #127-Ubuntu SMP Fri Mar 11 00:25:37 UTC 2016 
x86_64 x86_64 x86_64 GNU/Linux
  
  Workaround:
- Edit /etc/init/autofs as shown in attached files (both full file and diff 
provided). Unfortunately, this modification will work only in this particular 
configuration, thus it is not a good candidate for a patch. 
+ Edit /etc/init/autofs as shown in attached files (both full file and diff 
provided). Unfortunately, this modification will work only in this particular 
configuration, thus it is not a good candidate for a patch.
  Explanation:
  We have to deal with two problems here:
  1. Autofs starts on runlevel [2345], and in effect its startup order in 
relation to sssd is random. We fix this by changing start stanza to "start on 
started sssd".
  2. Unfortunately this is not enough, because sssd emits started event too 
early, before its autofs support is ready. To work around this, we add a loop 
to pre-start script that waits for sssd to start listening on 
/var/lib/sss/pipes/autofs.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Changed in: autofs (Ubuntu)
   Status: Confirmed => Invalid

** Changed in: sssd (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: sssd (Ubuntu)
 Assignee: (unassigned) => Victor Tapia (vtapia)

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

The patch was merged[1], so I'll start working in the SRU as soon as I
can.

https://git.fedorahosted.org/cgit/sssd.git/commit/?id=d4063e9a21a4e203bee7e0a0144fa8cabb14cc46

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Victor, thanks a lot for the explanation. I apologize for not
volunteering to test your patch, but it fixes an issue (#2) that I am
unable to reproduce in Xenial. But I really appreciate your efforts.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

Hi Maciej,

I'm attaching the suggested patch to this bug, but bear in mind it's
adapted to upstream's code.

Originally, SSSD creates the pidfile at an early stage (once it forks)
before the providers have started. This patch moves the pidfile creation
to a point where the providers are up and ready, allowing us to monitor
this file creation in the boot scripts for upstart/systemd. With a few
tweaks in the boot scripts, this would fix points #1 and #2 in the list.

Regarding #3, SSSD monitors the status of the network interfaces using
libnl, triggering an internal restart of the services when a change
happens. It don't think this is a problem by itself, rather than a bad
combination with #4

** Patch added: "pidfile sssd.patch"
   
https://bugs.launchpad.net/ubuntu/+source/autofs/+bug/1566508/+attachment/4774029/+files/pidfile%20sssd.patch

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Victor, would you be so kind to post a link to your patch, and also tell
us which of the numerous issues discussed in this bug report (comment
#20) are solved by the patch?

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

A patch has been submitted upstream for review. As soon as it lands,
I'll work on an SRU.

Regards,

Victor

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[Bug 1566508] Re: autofs races with sssd on startup

[Malcolm-whsg]

#23 works for me - fantastic

Thanks

Mal

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[Bug 1566508] Re: autofs races with sssd on startup

[mush]

I wasn't able to fix the issue with the solutions proposed up there,
so I managed to find another workaround for autofs to be operational on startup.
The only difference is that im using unbound to resolve my DNS.
Just add this line under EnvironnementFile in 
/etc/systemd/system/multi-user.target.wants/sssd.service
  EnvironmentFile=-/etc/sysconfig/sssd
+ ExecStartPre=/bin/sleep 10

Then we have to create a script which is going to make sleep 10 sec restart 
unbound sleep again 10sec then restart autofs in /etc/init.d/restartautofs
After creating the script like the attachment I posted just run:
update-rc.d restartautofs defaults
To be sure the script starts at the end change the names of the 01restartautofs 
to S99restartautofs
(in each levels /etc/rc2.d/ /etc/rc3.d/ /etc/rc4.d/ /etc/rc5.d/)
So we are good to go with this workaround sssd and networking services are ok 
before autofs start so its mapping correctly.



** Attachment added: "script"
   
https://bugs.launchpad.net/ubuntu/+source/autofs/+bug/1566508/+attachment/4763180/+files/restartautofs

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

> Is it a daft question to ask why it works for them and not you ?

This is a very good question. My take on it is as follows.

There are several issues here, and the majority are related to startup
configuration. Speaking of Ubuntu 16.04, the problem is that Ubuntu
first switched from SysV startup to Upstart, and then (quite recently)
to systemd. Switch to Upstart was difficult and there were many problems
similar to this one, but before they were all ironed out, another switch
to systemd occurred. The result is a total mess. As an example, systemd
service unit is currently missing from autofs package, and so while for
sssd the switch was from Upstart to systemd, for autofs it was actually
Upstart -> SysV. And this is not the only issue.

Ubuntu 14.04, on the other hand, was released before the Upstart ->
systemd switch. Here the problem is that Upstart's event-driven model is
fundamentally flawed, and unable to express startup dependencies in a
general case (as opposed to installation-specific setup). This is the
reason why Upstart-related problems were not entirely fixed before the
switch to systemd: because they could not be fixed within Upstart
framework.

I have never used OpenSUSE, but I believe that it did not switch its
init system to Upstart, but rather directly from SysV to systemd. And it
did so much earlier than Ubuntu. Because of that it had a headstart and
much less mess to clean up, having to deal with only one switch. No
wonder then that its startup works better.

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[Bug 1566508] Re: autofs races with sssd on startup

[Malcolm-whsg]

We are experimenting with using a Debian based distro
and this bug seems to be in all of them. We currently use
OpenSUSE 13.2/Leap 42.1 and this works perfectly. Is it a 
daft question to ask why it works for them and not you ?

Ta

M

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Here is my attempt to sort out how many bugs are related to autofs
failing on boot.

This bug (1566508) 
As noted earlier, these are actually two issues:
1. autofs starts before sssd.
2. autofs starts after sssd, but before sssd responders are up.
On Trusty, I observed #1 and #2, and on Xenial I observed neither, while Victor 
Tapia reported only observing #2 on Xenial (comment #13).
Regarding the apparent fix for #1 in Xenial, I believe that it is accidental, 
and the proper fix is subject of bug 1614248. Regarding #2 in Xenial, I can 
only say that I tried very hard to reproduce it, and I could not.

In this bug we also discuss another issue that was not subject of the original 
bug report:
3. sssd trying to connect to its providers (e.g. LDAP) before network is ready.
On Trusty, I observed it only very rarely, but in Xenial this issue occurred on 
every boot. Victor Tapia reports observing this problem on both Trusty and 
Xenial.

I do not think that creating a new autofs or sssd bug for this issue
would be a good idea, because this problem is not caused directly by
autofs or sssd, but rather is a result of ifupdown bug 1588915 (at least
this is so on Xenial).

However this bug would be no reason of concern if autofs were able to recover 
from an initial map read failure. There are two issues here, both covered by 
bug 1614282:
4. autofs does not appear to read cached automount maps from sssd.
5. autofs does not mount shares even when it is finally able to read maps from 
sssd, after network is up and sssd has been able to receive maps from its 
provider (e.g. LDAP).

Regarding #4, the problem may lie with sssd rather than autofs. I am not sure 
if this issue is related to problem mentioned by Jakub Hrozek in comment #9. 
However, Jakub's patch will fix #4 (possibly), but not #5; we also want autofs 
to mount shares, when possible, even when there were no maps in cache on 
startup.
As to Victor's comment #3, I observed the problem with indirect maps. All maps, 
including the master map, come from the LDAP server, so perhaps it's the master 
map that is not updated automatically, rendering everything unusable. 
Unfortunately, my tests with sending HUP to automount daemon did not produce 
results as described in the manpage (yet another bug?). In any case, the logic 
that manpage describes as "change on the fly" should not apply to the situation 
when there is no master map whatsoever due to an earlier error (as is our case).

Links to related bugs:
Bug 1588915 ifup does not block for interface to be up with static addresses 
Bug 1614248 Package autofs does not include autofs.service file
Bug 1614282 autofs does not recover from failure to read maps on startup
Bug 1584818 autofs fails to read sss [duplicate, but difficult to say what of; 
most likely referring to issue #3]

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Issues related to ifup and service files included in ifupdown package
are reported as bug 1588915.

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

In order to test whether the bug which is the subject of this bug report
(i.e. "no mounts in table", not "setautomntent") occurs in Xenial with
systemd, I created autofs.service as attached below. This way I could
dispense with /etc/init.d/autofs and directly control when autofs is
started. I can report that I was unable to reproduce this bug. When
autofs was configured to start after sssd, and sssd started after
network was up, autofs mounted all shares as expected and no error
messages were logged.

On the other hand, if both sssd and autofs started before network was up, 
shares would not be mounted, and syslog would contain an error message 
"setautomntent: lookup(sss): setautomntent: No such file or directory".
If autofs was started before sssd, the error message would be "setautomntent: 
lookup(sss): setautomntent: Connection refused".
Ensuring that network interfaces were up before systemd reached network.target 
and network-online.target was a pain in the neck and an exercise of 
frustration. But this is material for another bug report.

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Here is the autofs.service file mentioned above.

** Attachment added: "autofs.service"
   
https://bugs.launchpad.net/ubuntu/+source/autofs/+bug/1566508/+attachment/4719398/+files/autofs.service

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Jakub, the "setautomntent" message occurs at the same time when autofs
fails to mount shares on startup. So, while itself it is not a bug and
nobody here suggests that the message should be silenced, it is
nonetheless one of the symptoms of the problem, which is caused most
likely by a number of individual bugs, none of them actually in autofs
code. Similarly a fever is not an illness, but it is usually a symptom
of one.

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[Bug 1566508] Re: autofs races with sssd on startup

[Jakub Hrozek]

The message "setautomntent: lookup(sss): setautomntent: No such file or
directory" is not indicative of any bug whasoever. It just means there
are no more entries in this maps.

But in general, I think the most systematic way forward for this kind of
startup races would be to socket-activate the responders and switch to
let systemd manage all the responders. sssd should not try to be a
service manager.

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Victor, you are right saying that we are dealing with more than one bug
here. It appears to me that we have 3 or 4 separate bugs all conspiring
to prevent autofs from starting in the configuration as described above.
I think that the "setautomntent" error message is a symptom of a
different bug than the one causing the "no mounts in table" error. I
experienced both problems in Trusty/upstart, but so far only the
"setautomntent" bug in Xenial/Systemd/autofs-with-SysV. According to my
tests, the "setautomntent" bug is caused by sssd starting before network
is ready, while "no mounts in table" results from sssd reaching ready
state before its responders are up. However, Xenial startup is a total
mess, and I am still trying to figure out what is really happening, so I
may be wrong in the details.

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

>5. The issue being subject of this bug report is very likely still present, 
>though I was unable to
>reproduce it exactly. Unfixed issue #2 caused auto fs to fail with a different 
>error message 
>("setautomntent: lookup(sss): setautomntent: No such file or directory"), 
>while fixed issue #2 hid 
>the bug. The workaround involving waiting for sssd to start listening on 
>/var/lib/sss/pipes/autofs 
>can still be used for extra safety. 

Just for completeness, there are two different bugs going on:

- SSSD set as started before the responders are up, having AutoFS trying
to connect to them ("setautomntent: lookup(sss): setautomntent: No such
file or directory"). This has been reported at
https://fedorahosted.org/sssd/ticket/3080

- SSSD trying to connect to its providers (LDAP, for instance) before
the network is ready. This is the case you have detailed here, and is
covered by Jakub's patches.

In my tests Xenial/Systemd can hit both of them, while Trusty/Upstart
hits just the first one.

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: sssd (Ubuntu)
   Status: New => Confirmed

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[Bug 1566508] Re: autofs races with sssd on startup

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: autofs (Ubuntu)
   Status: New => Confirmed

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

Jakub, thanks for the information.
Launchpad mangles the URL that you posted in an attempt to hide email addresses 
from public view, here it is in an equivalent form that does not include '@':
https://lists.fedorahosted.org/archives/list/sssd-devel%40lists.fedorahosted.org/message/QKU5H4VUCIZ43LBJTRPPK3XWL6CTQNQ4/

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Jakub Hrozek]

As long as there are any maps in the cache, these fixes should help:
https://lists.fedorahosted.org/archives/list/sssd-de...@lists.fedorahosted.org/message/QKU5H4VUCIZ43LBJTRPPK3XWL6CTQNQ4/

(but upstream didn't merge them yet)

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

I finally had a chance to test this issue in Ubuntu 16.04. In a setup
described as in the bug description above, autofs still won't start
correctly, and this is a result of the whole string of problems. Most of
them appear to be separate bugs, but I will list them here for
completeness:

1. ifup returns before interface is up.
2. ifup@.service finishes before interface is up. This is for two reasons: 
because the service calls ifup, and because the service has wrong type (simple 
instead of oneshot). As a result, network-online.target is reached at a wrong 
time.
3. sssd.service does not wait for network-online.target.
4. autofs reverted in Xenial to a SysV-style script and does not have a 
systemd-style service file. Thus it is difficult to request that it is started 
after sssd. However, fixing #2 causes systemd to run SysV scripts much later, 
providing a relief for problems #4 and #5.
5. The issue being subject of this bug report is very likely still present, 
though I was unable to reproduce it exactly. Unfixed issue #2 caused auto fs to 
fail with a different error message ("setautomntent: lookup(sss): 
setautomntent: No such file or directory"), while fixed issue #2 hid the bug. 
The workaround involving waiting for sssd to start listening on 
/var/lib/sss/pipes/autofs can still be used for extra safety. I will test this 
further.

I will work more on these problems and submit bug reports for them if
they haven't been reported yet.

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

Yes. Systemd takes longer to set sssd as started, making the time window
smaller for the race condition to happen, but it can still appear when
the machine boots fast enough (VMs, for instance, show this issue
consistently)

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  autofs races with sssd on startup

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[Bug 1566508] Re: autofs races with sssd on startup

[Timo Aaltonen]

so this is an issue with systemd too?

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

Bug opened upstream: https://fedorahosted.org/sssd/ticket/3080

** Bug watch added: fedorahosted.org/sssd/ #3080
   https://fedorahosted.org/sssd/ticket/3080

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Attachment added: "sssd.conf workaround for upstart"
   
https://bugs.launchpad.net/ubuntu/+source/sssd/+bug/1566508/+attachment/4688591/+files/sssd.conf

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

As mentioned in the description, Autofs starts before SSSD's responders
are running, even though SSSD is set to start before Autofs, both in
upstart and systemd. The problem is related to the boot process of SSSD
because upstart/systemd determine the job as started right after sssd
forks, when in reality it's still starting the providers and responders
that other services (e.g. autofs) might require.

Regarding AutoFS's required start: if AutoFS starts before SSSD, it'll
have an empty mapping table. Once SSSD is running AutoFS will populate
it, but only the indirect maps would be applied. According to its man
page: Direct maps require a HUP signal be sent to the daemon to refresh
their contents as does the master map.

In previous releases, SSSD delayed the creation of its pidfile to
address this issue
(https://git.fedorahosted.org/cgit/sssd.git/commit/?id=d19c4785215305e6eb5f2fa2fc503a2ba50d3f10).
I'll try to bring this back and experiment with the results.

I'm going to provide a different workaround based on sssd.

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[Bug 1566508] Re: autofs races with sssd on startup

[Victor Tapia]

** Tags added: sts

** Also affects: sssd (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1566508] Re: autofs races with sssd on startup

[Maciej Puzio]

** Patch added: "autofs.conf.diff"
   
https://bugs.launchpad.net/ubuntu/+source/autofs/+bug/1566508/+attachment/4625148/+files/autofs.conf.diff

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