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Bug 1112691 - ipa-server-install break sshd
ipa-server-install break sshd
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ipa (Show other bugs)
7.0
Unspecified Unspecified
medium Severity unspecified
: rc
: ---
Assigned To: Martin Kosek
Namita Soman
:
Depends On:
Blocks: 1201454
  Show dependency tree / graph
 
Reported: 2014-06-24 09:40 EDT by Martin Kosek
Modified: 2015-03-17 08:17 EDT (History)
5 users (show)

See Also:
Fixed In Version: ipa-4.0.3-1.el7
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2015-03-05 05:12:43 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0442 normal SHIPPED_LIVE Moderate: ipa security, bug fix, and enhancement update 2015-03-05 09:50:39 EST

  None (edit)
Description Martin Kosek 2014-06-24 09:40:33 EDT 
This bug is created as a clone of upstream ticket:
https://fedorahosted.org/freeipa/ticket/4373

Just ran ipa-server install on to different Fedora20 machines:

THe second time, I was able to log in and see why sshd stopped running.   

From /var/log/messages


Jun 10 23:04:17 ipa sshd: /etc/ssh/sshd_config line 156: Bad yes/no argument: noKerberosAuthentication


When I edited that file, I saw  two lines were concatenated, as if a newline had been missed:

{{{
UseDNS noKerberosAuthentication no
PubkeyAuthentication yes
}}}

Once this fails, you cannot log into the machine.  sshd will not start.  With an OpenStack install, this is a fatal error:  the machine is unusable afterwards.


The workaround is to edit the file by hand and restart sshd.
Comment 1 Martin Kosek 2014-06-26 06:11:06 EDT 
Fixed upstream
master:
https://fedorahosted.org/freeipa/changeset/3e0245f28fe3f294f21b8d0cc298b1901119921d

Tested with ipa-client-install after I removed the trailing new line in /etc/ssh/sshd_config with:

# perl -i -pe 'chomp if eof' /etc/ssh/sshd_config

With this fix, the sshd_config is no longer broken.
Comment 3 Kaleem 2014-12-17 06:30:49 EST 
How to QE can verify this?
Comment 4 Martin Kosek 2014-12-17 07:54:03 EST 
See https://bugzilla.redhat.com/show_bug.cgi?id=1112691#c1.
Comment 5 Jenny Galipeau 2015-01-27 09:32:40 EST 
Post IPA server install

UseDNS is commented out in the /etc/ssh/sshd_config


Configuration around line 156 ...

KerberosAuthentication no
PubkeyAuthentication yes
UsePAM yes
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
GSSAPIAuthentication yes
AuthorizedKeysCommandUser nobody

sshd service restarts without issue


service is running

# systemctl status  sshd.service
sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled)
   Active: active (running) since Tue 2015-01-27 09:27:54 EST; 5s ago
 Main PID: 24314 (sshd)
   CGroup: /system.slice/sshd.service
           └─24314 /usr/sbin/sshd -D

Jan 27 09:27:54 ibm-x3250m4-05.testrelm.test systemd[1]: Starting OpenSSH server daemon...
Jan 27 09:27:54 ibm-x3250m4-05.testrelm.test systemd[1]: Started OpenSSH server daemon.
Jan 27 09:27:54 ibm-x3250m4-05.testrelm.test sshd[24314]: Server listening on 0.0.0.0 port 22.
Jan 27 09:27:54 ibm-x3250m4-05.testrelm.test sshd[24314]: Server listening on :: port 22.


Service stops are starts without issue

# systemctl stop  sshd.service

# systemctl status  sshd.service
sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled)
   Active: inactive (dead) since Tue 2015-01-27 09:29:35 EST; 5s ago
  Process: 24323 ExecStart=/usr/sbin/sshd -D $OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 24323 (code=exited, status=0/SUCCESS)

Jan 27 09:29:18 ibm-x3250m4-05.testrelm.test systemd[1]: Starting OpenSSH server daemon...
Jan 27 09:29:18 ibm-x3250m4-05.testrelm.test systemd[1]: Started OpenSSH server daemon.
Jan 27 09:29:18 ibm-x3250m4-05.testrelm.test sshd[24323]: Server listening on 0.0.0.0 port 22.
Jan 27 09:29:18 ibm-x3250m4-05.testrelm.test sshd[24323]: Server listening on :: port 22.
Jan 27 09:29:35 ibm-x3250m4-05.testrelm.test systemd[1]: Stopping OpenSSH server daemon...
Jan 27 09:29:35 ibm-x3250m4-05.testrelm.test sshd[24323]: Received signal 15; terminating.
Jan 27 09:29:35 ibm-x3250m4-05.testrelm.test systemd[1]: Stopped OpenSSH server daemon.


# systemctl start  sshd.service

# systemctl status  sshd.service
sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled)
   Active: active (running) since Tue 2015-01-27 09:29:48 EST; 6s ago
 Main PID: 24330 (sshd)
   CGroup: /system.slice/sshd.service
           └─24330 /usr/sbin/sshd -D

Jan 27 09:29:48 ibm-x3250m4-05.testrelm.test systemd[1]: Starting OpenSSH server daemon...
Jan 27 09:29:48 ibm-x3250m4-05.testrelm.test systemd[1]: Started OpenSSH server daemon.
Jan 27 09:29:48 ibm-x3250m4-05.testrelm.test sshd[24330]: Server listening on 0.0.0.0 port 22.
Jan 27 09:29:48 ibm-x3250m4-05.testrelm.test sshd[24330]: Server listening on :: port 22.

# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 7.1 Beta (Maipo)

# rpm -q ipa-server
ipa-server-4.1.0-16.el7.x86_64

Is this enough to verify this bug?
Comment 7 Martin Kosek 2015-01-28 04:19:59 EST 
If you updated sshd_config before IPA installation to miss the final line break (as described in Comment 1), then yes.
Comment 9 errata-xmlrpc 2015-03-05 05:12:43 EST 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0442.html
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