tl;dr: dhclient -6 should be less spam-chatty in the presence of no ipv6
support.
If dhclient logged that as one message, instead of 9 messages, then
syslog would compress the output.
The easiest way that I've seen to reproduce this is to boot with
ipv6.disable=true on the kernel command line.
Nobuto: do you have ipv6 disabled via the kernel command line? (This is
known to cause various issues for a number of daemons.)
** Also affects: isc-dhcp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1640147
Title:
[2.1] rsyslog is flooded with "no link-local IPv6 address for $IFACE"
on commissioning
Status in MAAS:
Triaged
Status in isc-dhcp package in Ubuntu:
New
Bug description:
When commissioning, /var/log/maas/rsyslog/ is flooded with the
repeated messages below with over 30,000 lines.
====
Nov 8 11:57:54 bunyip dhclient[4734]: no link-local IPv6 address for enp4s0f0
Nov 8 11:57:54 bunyip dhclient[4734]:
Nov 8 11:57:54 bunyip dhclient[4734]: If you think you have received this
message due to a bug rather
Nov 8 11:57:54 bunyip dhclient[4734]: than a configuration issue please read
the section on submitting
Nov 8 11:57:54 bunyip dhclient[4734]: bugs on either our web page at
www.isc.org or in the README file
Nov 8 11:57:54 bunyip dhclient[4734]: before submitting a bug. These pages
explain the proper
Nov 8 11:57:54 bunyip dhclient[4734]: process and the information we find
helpful for debugging..
Nov 8 11:57:54 bunyip dhclient[4734]:
Nov 8 11:57:54 bunyip dhclient[4734]: exiting.
====
$ wc -l /var/log/maas/rsyslog/bunyip/2016-11-08/messages
39278 /var/log/maas/rsyslog/bunyip/2016-11-08/messages
It would be nice to suppress those lines if those could be safely
ignored. It would make troubleshooting easier when something wrong
happened on commissioning.
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