Ubuntu Server Guide

Merge lp://qastaging/~jpds/serverguide/ntp-update into lp://qastaging/~ubuntu-core-doc/serverguide/precise

ntp-update
Merge into precise

Proposed by Jonathan Davies on 2012-03-15

Status:	Rejected
Rejected by:	Peter Matulis on 2012-03-26
Proposed branch:	lp://qastaging/~jpds/serverguide/ntp-update
Merge into:	lp://qastaging/~ubuntu-core-doc/serverguide/precise
Diff against target:	11 lines (+1/-1) 1 file modified serverguide/C/network-config.xml (+1/-1)
To merge this branch:	bzr merge lp://qastaging/~jpds/serverguide/ntp-update
Related bugs:	Link a bug report

Reviewer	Date Requested	Status
Peter Matulis (community)	2012-03-15	Disapprove on 2012-03-26
Doug Smythies	2012-03-21	Needs Information on 2012-03-21
Review via email: mp+97644@code.qastaging.launchpad.net

Description of the change

Updated server used by ntpdate example to new default in Ubuntu.

Revision history for this message

Doug Smythies (dsmythies) wrote on 2012-03-21:

Both of my 12.04 beta test machines, which are up to date as of earlier today, seems to be using europium.canonical.com ( 91.189.94.4 ) for this. Is that just because it is still in beta?

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Doug Smythies (dsmythies) wrote on 2012-03-21:

I think I was supposed to set "needs information" before. Setting it now.

review: Needs Information

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Peter Matulis (petermatulis) wrote on 2012-03-26:

Jonathan, the default install does not have a /etc/ntp.conf (you told me out-of-band that this is where you found '0.ubuntu.pool.ntp.org'). The default install puts the NTP server in /etc/default/ntpdate:

$ sudo grep -ri ntp /etc | grep -i ubuntu
/etc/default/ntpdate:NTPSERVERS="ntp.ubuntu.com"

and is the same as we currently have in the guide.

The file '/etc/ntp.conf' comes from the package 'ntp' which is not even installed by default.

Doug, yes, the above hostname resolves to '91.189.94.4'.

review: Disapprove

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Jonathan Davies (jpds) wrote on 2012-03-27:

See: ntp-4.2.6.p3+dfsg/debian/ntp.conf in the Debian source package.

Revision history for this message

Doug Smythies (dsmythies) wrote on 2012-03-27:

O.K. My understanding is (not saying it is right, just saying it is my current understanding):

. Without NTP type changes to a default install, the once run of ntpdate during boot will use ntp.ubuntu.com (91.189.94.4, which reverse lookup gives europium.canonical.com)

. If ntpd is installed, then it is unclear as to what NTP server will be used during boot. My system seems to have used 184.105.192.247 ( 247.conarusp.net ).

. If ntpd is removed via "sudo apt-get remove ntp" then the /etc/ntp.conf file stays. It remains unclear as to what NTP server will be used during boot. My system used 216.194.70.2 ( tb.mircx.com ).

. If all ntp files are purged via "sudo apt-get purge ntp" then the /etc/ntp.conf file is gone and during boot the original ntp.ubuntu.com address is used.

Yes, I see the entries in /etc/nto.conf as described in the subsequent sections of this chapter,
i.e. 0.ubuntu.pool.ntp.org. It is not clear to me why they don't seem to be used, but I do have ipv6 disabled on this computer and I do see ipv6 complaints in /var/log/syslog.

I agree that the line of this merge proposal should be left as it was.