Public bug reported:
The change to ifup@.service done as part of LP 1425376 appears to break the
ordering of units marked as "After=network-online.target". In my specific
case, a new service script with "After=network-online.target" is erroneously
run concurrently with dhclient. As the new script depends on networking
configuration being complete, it fails as the IP addresses and routes from DHCP
are not configured. This functioned correctly on vivid daily images from a few
days ago, and appears to break starting with the vivid daily from approximately
0409.
Infinity suggested this change as a likely suspect:
diff -Nru systemd-219/debian/extra/units/ifup@.service
systemd-219/debian/extra/units/ifup@.service
--- systemd-219/debian/extra/units/ifup@.service 2015-04-02
08:08:56.000000000 +0000
+++ systemd-219/debian/extra/units/ifup@.service 2015-04-07
14:38:38.000000000 +0000
@@ -6,10 +6,8 @@
DefaultDependencies=no
[Service]
-Type=oneshot
-ExecStart=/sbin/ifup --allow=hotplug %I
-ExecStartPost=/sbin/ifup --allow=auto %I
# only fail if ifupdown knows about the iface AND it's not up
-ExecStartPost=/bin/sh -c 'if ifquery %I >/dev/null; then ifquery --state %I
>/dev/null; fi'
+ExecStart=/bin/sh -ec 'ifup --allow=hotplug %I; ifup --allow=auto %I; \
+ if ifquery %I >/dev/null; then ifquery --state %I >/dev/null; fi'
ExecStop=/sbin/ifdown %I
RemainAfterExit=true
and, indeed, reverting this (copying ifup@.service from a few-days old
vivid image to a current image) resolves the problem.
The affected version is ubuntu-vivid-daily-amd64-server-20150409.2
(installed via AWS).
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Package changed: linux (Ubuntu) => systemd (Ubuntu)
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https://bugs.launchpad.net/bugs/1442828
Title:
change for LP 1425376 breaks systemd After=network-online.target
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