[Bug 1640147] Re: [2.1] rsyslog is flooded with "no link-local IPv6 address for $IFACE" on commissioning

[Mike Pontillo]

I'm still seeing this on trunk.

Mar 28 22:58:05 skylake dhclient[4804]: no link-local IPv6 address for eno1
Mar 28 22:58:05 skylake dhclient[4804]:
Mar 28 22:58:05 skylake dhclient[4804]: If you think you have received this message due to a bug rather
Mar 28 22:58:05 skylake dhclient[4804]: than a configuration issue please read the section on submitting
Mar 28 22:58:05 skylake dhclient[4804]: bugs on either our web page at www.isc.org or in the README file
Mar 28 22:58:05 skylake dhclient[4804]: before submitting a bug.  These pages explain the proper
Mar 28 22:58:05 skylake dhclient[4804]: process and the information we find helpful for debugging..
Mar 28 22:58:05 skylake dhclient[4804]:
Mar 28 22:58:05 skylake dhclient[4804]: exiting.

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Title:
  [2.1] rsyslog is flooded with "no link-local IPv6 address for $IFACE"
  on commissioning

Status in MAAS:
  Fix Released
Status in MAAS 2.1 series:
  Fix Released
Status in isc-dhcp package in Ubuntu:
  Invalid

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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