Ok, I've succeeded in verifying this by adding an artificial
ExecStartPre=/bin/sleep 10 to both old and new resolvconf.service.  Old:

# journalctl -o short-precise --unit resolvconf.service --unit 
network-online.target --unit systemd-networkd-wait-online.service --unit 
systemd-networkd.service  --no-pager
-- Logs begin at Thu 2017-04-20 07:36:15 UTC, end at Thu 2017-04-20 07:36:37 
UTC. --
Apr 20 07:36:17.265818 ubuntu systemd[1]: Starting Network Service...
Apr 20 07:36:17.430595 ubuntu systemd-networkd[905]: Enumeration completed
Apr 20 07:36:17.437376 ubuntu systemd[1]: Started Network Service.
Apr 20 07:36:17.440060 ubuntu systemd[1]: Starting Wait for Network to be 
Configured...
Apr 20 07:36:17.460259 ubuntu systemd-networkd[905]: ens3: IPv6 enabled for 
interface: Success
Apr 20 07:36:17.473412 ubuntu systemd-networkd[905]: ens3: Gained carrier
Apr 20 07:36:17.499888 ubuntu systemd-networkd[905]: ens3: DHCPv4 address 
192.168.122.138/24 via 192.168.122.1
Apr 20 07:36:18.934247 ubuntu systemd-networkd[905]: ens3: Gained IPv6LL
Apr 20 07:36:25.978756 ubuntu systemd[1]: Started Nameserver information 
manager.
Apr 20 07:36:31.522527 ubuntu systemd-networkd[905]: ens3: Configured
Apr 20 07:36:31.531655 ubuntu systemd[1]: Started Wait for Network to be 
Configured.
Apr 20 07:36:31.533566 ubuntu systemd[1]: Reached target Network is Online.

New:
# journalctl -o short-precise --unit resolvconf.service --unit 
network-online.target --unit systemd-networkd-wait-online.service --unit 
systemd-networkd.service  --no-pager
-- Logs begin at Thu 2017-04-20 07:38:31 UTC, end at Thu 2017-04-20 07:39:01 
UTC. --
Apr 20 07:38:41.872259 ubuntu systemd[1]: Started Nameserver information 
manager.
Apr 20 07:38:41.890403 ubuntu systemd[1]: Starting Network Service...
Apr 20 07:38:41.930968 ubuntu systemd-networkd[987]: Enumeration completed
Apr 20 07:38:41.931769 ubuntu systemd[1]: Started Network Service.
Apr 20 07:38:41.934063 ubuntu systemd[1]: Starting Wait for Network to be 
Configured...
Apr 20 07:38:41.944754 ubuntu systemd-networkd[987]: ens3: IPv6 enabled for 
interface: Success
Apr 20 07:38:41.950236 ubuntu systemd-networkd[987]: ens3: Gained carrier
Apr 20 07:38:41.957193 ubuntu systemd-networkd[987]: ens3: DHCPv4 address 
192.168.122.138/24 via 192.168.122.1
Apr 20 07:38:43.444868 ubuntu systemd-networkd[987]: ens3: Gained IPv6LL
Apr 20 07:38:56.057060 ubuntu systemd-networkd[987]: ens3: Configured
Apr 20 07:38:56.060665 ubuntu systemd-networkd-wait-online[1010]: ignoring: lo
Apr 20 07:38:56.069850 ubuntu systemd[1]: Started Wait for Network to be 
Configured.
Apr 20 07:38:56.076092 ubuntu systemd[1]: Reached target Network is Online.

In neither case did I end up with an unconfigured /etc/resolv.conf , but
this does at least demonstrate the capacity for the race (and its
resolution).  Marking verified.

** Tags added: verification-done-yakkety

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1649931

Title:
  systemd-networkd needs to ensure DNS is up before network-
  online.target

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1649931/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to