Bug 1024568 - chrony does not obtain DHCP NTP server address
chrony does not obtain DHCP NTP server address
Product: Fedora
Classification: Fedora
Component: chrony (Show other bugs)
x86_64 Unspecified
unspecified Severity unspecified
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Assigned To: Miroslav Lichvar
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-10-29 20:52 EDT by Darren
Modified: 2014-06-16 21:23 EDT (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2014-02-05 17:31:02 EST
Type: Bug
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description Darren 2013-10-29 20:52:11 EDT
Description of problem:
I have upgraded from chrony-1.27-0.5.pre1.git1ca844.fc18.x86_64 to 1.29. The dhclient scripts runs via NetworkManager-dispatcher which in turn runs /etc/dhcp/dhclient.d/chrony.sh
This scripts normally creates both /var/lib/dhclient/chrony.added_servers and  chrony.servers.eth0.
In version 1.29 only chrony.servers.eth0 is created. This results in chronyc not displaying any sources.
There seems to be an issue with the chrony-helper scripts.

Version-Release number of selected component (if applicable):
chrony.x86_64                       1.29-1.fc18 

How reproducible:

Steps to Reproduce:
1. reboot or systemctl restart NetworkManager
2. chronyc sources

Actual results:
chronyc sources
210 Number of sources = 1
MS Name/IP address         Stratum Poll Reach LastRx Last sample

Expected results:
210 Number of sources = 1
MS Name/IP address         Stratum Poll Reach LastRx Last sample
^* csu-virt.site04.exelis.sy     9  10   377   652   +334us[ +360us] +/-  448us

Additional info:
Comment 1 Miroslav Lichvar 2013-10-30 04:28:20 EDT
That's odd. There were no changes in the chrony dhclient script between 1.27-0.5.pre1.git1ca844.fc18 and 1.29-1.fc18.

Are there any servers in the chrony.servers.eth0 file? If there are, can you please try running "bash -x /usr/libexec/chrony-helper add-dhclient-servers" and attach the output here?
Comment 2 Darren 2013-10-31 18:22:49 EDT
es I think NM is working fine as if I rm -f /var/lib/dhclient/chrony.* and then systemctl restart NetworkManager I get cat /var/lib/dhclient/chrony.servers.eth0 with a valid address.
I need to check what openvpn actually does. I have selinux disabled and re-tested with the firewall disabled and it still does not work.
if I bash -x /usr/libexec/chrony-helper add-dhclient-servers
+ chronyc=/usr/bin/chronyc
+ dhclient_servers='/var/lib/dhclient/chrony.servers.*'
+ dhclient_added_servers=/var/lib/dhclient/chrony.added_servers
+ service_name=chronyd.service
+ case "$1" in
+ add_dhclient_servers
+ shopt -s nullglob
+ servers_files=($dhclient_servers)
+ shopt -u nullglob
+ ((  1  ))
++ cat /var/lib/dhclient/chrony.added_servers
++ read server serverargs
++ cat /var/lib/dhclient/chrony.servers.eth0
++ chrony_command 'add server '
++ read server serverargs
+ added_servers=
+ update_dhclient_added_servers ''
++ sort -u
++ echo ''
+ new_servers=
++ cat /var/lib/dhclient/chrony.added_servers
+ old_servers=
+ '[' '' = '' ']'
+ return 0
+ exit 0
The added_servers= is empty whereas with 1.27 chrony the added_servers=

To add confusion if I upgrade from a working 1.27 to 1.29 and delete the dhclient files and restart NM and chrony the system works. Could chrony.keys have anyrhing to do with it?
Note the PC is a kickstart image from a cobbler server (time server) using the latest FC18 packages. So downgrading to 1.27 and then going back to 1.29 seems to fix whatever is going wrong.
Comment 3 Miroslav Lichvar 2013-11-01 04:27:15 EDT
It looks like "chrony_command 'add server '" is failing. One of the reasons could be missing command key in the chrony.keys file. The key used to be generated by the chrony-helper script, but with 1.28 and later it's generated by chronyd itself on first start.

Can you please check that:
- chrony.conf contains the generatecommandkey directive
- there are no error messages in the system log from chronyd about permission problems, etc
- there is a key with id 1 in chrony.keys
- chronyc -a -m "add server" works
Comment 4 Fedora End Of Life 2013-12-21 09:43:23 EST
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '18'.

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Comment 5 Fedora End Of Life 2014-02-05 17:31:02 EST
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
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Thank you for reporting this bug and we are sorry it could not be fixed.
Comment 6 Darren 2014-06-16 21:23:35 EDT
I am happy to ignore this as I have moved to fedora 20 and the issue does not exist

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