maas-dhcp upgrade to 1.9.5+bzr4599-0ubuntu1~14.04.1 fails to start installed isc-dhcp-server

[Jamon Camisso]

An automatic update of maas-dhcp via landscape triggered alerts that DHCP was down on all controller nodes. The update appeared to stop any running dhcpd process, and failed to start the installed isc-dhcp-server dhcp.

Logs show messages like this:

Apr 3 13:40:18 kernel: [17717361.075006] init: isc-dhcp-server main process (15092) killed by TERM signal
Apr 3 13:40:28 maas.dhcp: [ERROR] DHCPv4 server failed to stop: 'maas-dhcpd' is unknown to upstart.
Apr 3 13:40:28 maas.dhcp: [ERROR] DHCPv4 server failed to stop: 'maas-dhcpd' is unknown to upstart.

[Andres Rodriguez (andreserl)]

Hi There,

Can you confirm that both your MAAS Region and Cluster controller are working as expected?
Can you attach logs? /var/log/maas/*.log
Can you restart your services? sudo service maas-regiond restart && sudo service maas-rackd restart
Can you attach the upstart job log?

[Launchpad Janitor (janitor)]

[Expired for maas (Ubuntu) because there has been no activity for 60 days.]

[Alexandre Gomes (alejdg)]

Here are the logs from the last occurrence.

/var/log/upstart/maas-dhcpd.log:

/var/lib/maas/dhcpd.conf does not exist. Aborting.
maas-dhcpd stop/pre-start, process 9058

/var/log/maas/maas.log: https://pastebin.canonical.com/207799/

/var/log/maas/clusterd.log: https://pastebin.canonical.com/207800/

[Andres Rodriguez (andreserl)]

Please att h logs from apt both the term and the history.

[Jamon Camisso (jamon)]

Sure, here's term.log:

Log started: 2018-01-08 14:59:40
Log ended: 2018-01-08 15:00:02

Log started: 2018-01-10 14:53:41
Log ended: 2018-01-10 14:53:52

Log started: 2018-01-17 18:01:43
Log ended: 2018-01-17 18:01:59

And here's history.log from the same host:

Start-Date: 2018-01-17 18:01:43
Upgrade: python-maas-provisioningserver:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3), maas-common:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3), maas-cli:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3), maas-dhcp:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3), maas-cluster-controller:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3), python-maas-client:amd64 (1.9.5+bzr4599-0ubuntu1~14.04.2, 1.9.5+bzr4599-0ubuntu1~14.04.3)
End-Date: 2018-01-17 18:01:59