This bug was fixed in the package cloud-init - 0.7.8-14-g94fd35e-
0ubuntu1
---------------
cloud-init (0.7.8-14-g94fd35e-0ubuntu1) yakkety; urgency=medium
* New upstream snapshot.
- systemd: run cloud-init.service Before dbus.service (LP: #1629797)
- unittests: fix use of mock 2.0 'assert_called' when running make check
[Ryan Harper]
- Improve module documentation and doc cleanup. [Wesley Wiedenmeier]
-- Scott Moser <smo...@ubuntu.com> Tue, 04 Oct 2016 16:46:05 -0400
** Changed in: cloud-init (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1629797
Title:
resolve service in nsswitch.conf adds 25 seconds to failed lookups
before systemd-resolved is up
Status in cloud-init package in Ubuntu:
Fix Released
Status in dbus package in Ubuntu:
Triaged
Bug description:
During boot, cloud-init does DNS resolution checks to if particular
metadata services are available (in order to determine which cloud it
is running on). These checks happen before systemd-resolved is up[0]
and if they resolve unsuccessfully they take 25 seconds to complete.
This has substantial impact on boot time in all contexts, because
cloud-init attempts to resolve three known-invalid addresses ("does-
not-exist.example.com.", "example.invalid." and a random string) to
enable it to detect when it's running in an environment where a DNS
server will always return some sort of redirect. As such, we're
talking a minimum impact of 75 seconds in all environments. This
increases when cloud-init is configured to check for multiple
environments.
This means that yakkety is consistently taking 2-3 minutes to boot on
EC2 and GCE, compared to the ~30 seconds of the first boot and ~10
seconds thereafter in xenial.
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