Bug#1134462: Significant boot delay with debian-14-genericcloud on Google Compute Engine

[Dominic Preston]

I found a cleaner fix, override the GCE cloud-init metadata_url as
below. Since it's now an IP address and not a hostname, it avoids the
failing DNS lookups.

datasource:
  GCE:
    metadata_url: http://169.254.169.254/computeMetadata/v1/