[2.1] Node commissioning failure - 'cloudinit' running config-ntp when node does not have route to the archive

[Nobuto Murata]

Commissioning fails with:
Node commissioning failure - 'cloudinit' running config-ntp with frequency once-per-instance
Node commissioning failure - 'cloudinit' running modules for config

It looks like APT HTTP proxy (maas-proxy) is not applied when running ntp module in cloud-init. The MAAS DHCP network does not have default gateway (isolated network), but MAAS itself has Internet access and offer an access to archive.ubuntu.com / security.ubuntu.com through maas-proxy.

See. attached rsyslog output.

[module ntp]
Oct 1 15:35:46 nearby-husky [CLOUDINIT] stages.py[DEBUG]: Running module ntp (<module 'cloudinit.config.cc_ntp' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py'>) with freque
ncy once-per-instance
...
Oct 1 15:35:47 nearby-husky cloud-init[992]: Err:6 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages
Oct 1 15:35:47 nearby-husky cloud-init[992]: Cannot initiate the connection to security.ubuntu.com:80 (91.189.88.162). - connect (101: Network is unreachable) [IP: 91.189.88.162 80]
...
Oct 1 15:35:48 nearby-husky [CLOUDINIT] handlers.py[DEBUG]: finish: modules-config/config-ntp: FAIL: running config-ntp with frequency once-per-instance

[module scripts-user]
Oct 1 15:35:52 nearby-husky [CLOUDINIT] stages.py[DEBUG]: Running module scripts-user (<module 'cloudinit.config.cc_scripts_user' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_scr
ipts_user.py'>) with frequency once-per-instance
...
Oct 1 15:36:04 nearby-husky cloud-init[1195]: Get:21 http://archive.ubuntu.com/ubuntu xenial-security/main Sources [42.3 kB]