On Tue, Feb 6, 2018 at 4:47 PM, Vincent Blut <[email protected]> wrote: > Control: tags -1 moreinfo > > Hi Christian, > > On Thu, Feb 01, 2018 at 09:43:07AM +0100, Christian Ehrhardt wrote: >> >> Package: chrony >> Version: 3.2-2 >> >> Description: >> Conversions of old $network behavior should be on online target [2]. >> And I think for chrony it makes sense to start when it really is >> online to not rely too much on the hooks to set it online. > > > Prior to the 3.0-1 release, we used to heavily rely on the hooks as the time > sources weren’t polled by chronyd due to the use of the “offline” option. > This behaviour wasn’t satisfactory to me, so I decided it was time to change > it for Debian Stretch so what's happening now is: > - If the network is up: > - chronyd starts > - chronyc online runs, but doesn't actually do anything > - names are resolved > - sources are added as online > - burst is executed > > - If the network is down: > - chronyd starts > - chronyc online doesn't run > - chronyd is periodically trying, in exponentially increasing > interval, to resolve the pool.ntp.org name, but fails > - network is up > - chronyc online runs from the hooks > - chronyd resolves the name > - sources are added as online > - burst is executed > > Also, I think chronyd should be started quite early so the clock frequency > offset is set from the drift file. It should also be noted that when used > with a reference clock, chronyd does not necessarily need network nor DNS.
Thanks for your explanations Vincent - I think you are right. We will need to make sure the hooks work for us (=Ubuntu) which might in some scenarios be an issue but is being worked on. I agree to keeping it starting as it is right now. Closing bug ... > However, if starting chronyd after the network is fully up is something you > really are looking for, I think you should start it after nss-lookup.target‽ > >> Ubuntu-Bug: https://bugs.launchpad.net/ubuntu/+source/chrony/+bug/1746458 >> Fix-in-Review: >> https://git.launchpad.net/~paelzer/ubuntu/+source/chrony/commit/?id=2baea8e0bde5d6a1de60098019fb658a4a94d489 >> >> [1]: >> https://code.launchpad.net/~paelzer/ubuntu/+source/chrony/+git/chrony/+merge/336844 >> [2]: https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/ >> >> -- >> Christian Ehrhardt >> Software Engineer, Ubuntu Server >> Canonical Ltd > > > Cheers, > Vincent -- Christian Ehrhardt Software Engineer, Ubuntu Server Canonical Ltd
