Comment 18 for bug 2059952

I reran the Xenial verification process and found that this proposed package does not change the behavior; that is, with the proposed package, pro services are still enable on first boot. Upon further investigation, I found that the version of cloud-init in xenial is 21.1-19-gbad84ad4-0ubuntu1~16.04.4 which does not contain the logic to drive the pro auto-attach process (which is where this bug exists).

The details of the testing I did are shown below:

$ gcloud compute instances create pro-order-bug --image testing-ubuntu-1604-xenial-v20240417 --image-project ubuntu-catred --metadata-from-file=user-data=userdata.yaml --zone us-central1-a

catred@pro-order-bug:~$ apt-cache policy ubuntu-pro-client
ubuntu-pro-client:
  Installed: 31.2.3~16.04
  Candidate: 31.2.3~16.04
  Version table:
 *** 31.2.3~16.04 100
        100 /var/lib/dpkg/status
     31.2.2~16.04 500
        500 http://us-central1.gce.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
catred@pro-order-bug:~$ pro status
SERVICE ENTITLED STATUS DESCRIPTION
cc-eal yes disabled Common Criteria EAL2 Provisioning Packages
cis yes disabled Security compliance and audit tools
esm-apps yes enabled Expanded Security Maintenance for Applications
esm-infra yes enabled Expanded Security Maintenance for Infrastructure
livepatch yes warning Current kernel is not supported

NOTICES
The current kernel (4.15.0-1160-gcp, x86_64) is not supported by livepatch.
Supported kernels are listed here: https://ubuntu.com/security/livepatch/docs/kernels
Either switch to a supported kernel or `pro disable livepatch` to dismiss this warning.

For a list of all Ubuntu Pro services, run 'pro status --all'
Enable services with: pro enable <service>

                Account: ubuntu-catred
           Subscription: ubuntu-catred
            Valid until: Fri Dec 31 00:00:00 9999 UTC
Technical support level: essential
catred@pro-order-bug:~$ sudo apt-cache policy cloud-init
cloud-init:
  Installed: 21.1-19-gbad84ad4-0ubuntu1~16.04.4
  Candidate: 21.1-19-gbad84ad4-0ubuntu1~16.04.4
  Version table:
 *** 21.1-19-gbad84ad4-0ubuntu1~16.04.4 510
        510 https://esm.ubuntu.com/infra/ubuntu xenial-infra-security/main amd64 Packages
        100 /var/lib/dpkg/status
     21.1-19-gbad84ad4-0ubuntu1~16.04.2 500
        500 http://us-central1.gce.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
     0.7.7~bzr1212-0ubuntu1 500
        500 http://us-central1.gce.archive.ubuntu.com/ubuntu xenial/main amd64 Packages