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Bug 1112691 - ipa-server-install break sshd
Summary: ipa-server-install break sshd
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ipa
Version: 7.0
Hardware: Unspecified
OS: Unspecified
medium
unspecified
Target Milestone: rc
: ---
Assignee: Martin Kosek
QA Contact: Namita Soman
URL:
Whiteboard:
Depends On:
Blocks: 1201454
TreeView+ depends on / blocked
 
Reported: 2014-06-24 13:40 UTC by Martin Kosek
Modified: 2015-03-17 12:17 UTC (History)
5 users (show)

Fixed In Version: ipa-4.0.3-1.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-05 10:12:43 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0442 0 normal SHIPPED_LIVE Moderate: ipa security, bug fix, and enhancement update 2015-03-05 14:50:39 UTC

Description Martin Kosek 2014-06-24 13:40:33 UTC 
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 10:11:06 UTC 
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 11:30:49 UTC 
How to QE can verify this?
Comment 4 Martin Kosek 2014-12-17 12:54:03 UTC 
See https://bugzilla.redhat.com/show_bug.cgi?id=1112691#c1.
Comment 5 Jenny Severance 2015-01-27 14:32:40 UTC 
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 09:19:59 UTC 
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 10:12:43 UTC 
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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