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Bug 1112691

Summary:	ipa-server-install break sshd
Product:	Red Hat Enterprise Linux 7	Reporter:	Martin Kosek <mkosek>
Component:	ipa	Assignee:	Martin Kosek <mkosek>
Status:	CLOSED ERRATA	QA Contact:	Namita Soman <nsoman>
Severity:	unspecified	Docs Contact:
Priority:	medium
Version:	7.0	CC:	jgalipea, jmontleo, ksiddiqu, mkosek, rcritten
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
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 10:12:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1201454

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