On Monday, May 15, 2017 08:49:42 PM you wrote: > On Mon, May 15, 2017 at 06:45:21PM -0000, Scott Kitterman wrote: > > I'm getting close to uploading a fix for this to Debian, so you might wait > > for that. > > It looks like you've implemented this using the network-online.target > approach, which as you mentioned might not DTRT for the localhost-only use > case. Did you decide that this is negligible?
That was the advice I got from the Debian systemd maintainers (that the impact would be negligible). > For the case of a server which always has a network connection, this works > fine. For the case of a standalone system with no configured network > connection, it probably also works fine. But for the case of e.g. a laptop > that sometimes has network and sometimes doesn't, if the system comes up > without network, postfix will not start and you will not have local > delivery. Is this the behavior you expect with your change? I tested this and if you're using NetworkManager at least there's some magic that happens which causes systemd to restart postfix once the network is available. Part of the reason I was having so much trouble replicating problems others were seeing was getting NM to quit 'helping' as the test system I was using also has a desktop installed. > Ultimately I want to SRU this into affected stable Ubuntu releases, so would > want a regression-free change. > > I see you are also setting After=nss-lookup.target. For the bug reported > here - which is about DNS resolution specifically - would it not suffice to > have postfix declare this After=nss-lookup.target, and for systemd-resolved > to be sequenced before it? According to the Debian systemd people, the systemd-resolved is superfluous. It's nss-lookup.target that I wanted all along. There's a very helpful (at least for me) discussion in the last few entries in the Debian bug. Reviewing that would be better advice than I have for what's safe/not as I cribbed from Michael Biebl's suggestions after just enough research to be able to convince myself I wasn't cargo culting. Scott K -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1519331 Title: Postfix cannot resolve DNS if network was unavailable when it was started, such as on a laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1519331/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
