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DescriptionOrion Poplawski
2017-06-30 20:29:16 UTC
Description of problem:
The ntpdate service starts before the network is online resulting in spurious messages like:
Jun 26 15:36:12 aspen ntpdate[641]: Can't find host ntp.cora.nwra.com: Name or service not known (-2)
It should have After=network-online.target instead of network.target, see https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
/usr/libexec/ntpdate-wrapper keeps trying until the network is up, so the service ultimately succeeds, but this just seems like a hack around not having the proper target.
Version-Release number of selected component (if applicable):
ntp-4.2.6p5-25.el7_3.2.x86_64
Looks like this was fixed in Fedora a while back (bug #1116474), would be nice to get this into RHEL7.
Up until (including) rhel-7.4, NetworkManager package installs a symlink
/usr/lib/systemd/system/network-online.target.wants/NetworkManager-wait-online.service
which effectively means that Nm-w-o.service is always pulled in by network-online.target (even if it was disabled). The only way to not run that service was by masking it (however, that still results in a harmless but ugly failure message during boot).
In Fedora and RHEL-7.5, this file will no longer be installed. This makes NM-w-o.service work as one would expect. However, we will also enable the service by default via preset (rh 1520867).
> [2] https://bugzilla.redhat.com/show_bug.cgi?id=1455704
yes, this bug is exactly about what I just said (for Fedora), and we are doing the same with rhel-7.5.
Regarding comment 18, on rhel <= 7.4 it would be expected that NM-w-o.service is disabled. However, it should anyway be started. That's why I don't understand how enabling the service could make any difference to the user and doubt that this claim is accurate.
Maybe comment 18 talks about some earlier rhel-7.5 snapshots, where the preset was not yet set to enable the service. That bug has been fixed in 7.5 in the meantime.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2018:0855