Comment 1 for bug 2067068

Example of error: https://autopkgtest.ubuntu.com/results/autopkgtest-xenial/xenial/arm64/u/ubuntu-advantage-tools/20240524_122900_98208@/log.gz

  0s autopkgtest [12:28:58]: starting date and time: 2024-05-24 12:28:58+0000
  0s autopkgtest [12:28:58]: git checkout: 699e7f9f ssh-setup/nova: explicitely set 'fqdn' in cloud-init
  0s autopkgtest [12:28:58]: host juju-7f2275-prod-proposed-migration-environment-3; command line: /home/ubuntu/autopkgtest/runner/autopkgtest --output-dir /tmp/autopkgtest-work.y8baphjq/out --timeout-copy=6000 --setup-commands /home/ubuntu/autopkgtest-cloud/worker-config-production/setup-canonical.sh --apt-pocket=proposed=src:ubuntu-advantage-tools --apt-upgrade ubuntu-advantage-tools --timeout-short=300 --timeout-copy=20000 --timeout-build=20000 '--env=ADT_TEST_TRIGGERS=ubuntu-advantage-tools/32.2~16.04' -- ssh -s /home/ubuntu/autopkgtest/ssh-setup/nova -- --flavor autopkgtest --security-groups <email address hidden> --name adt-xenial-arm64-ubuntu-advantage-tools-20240524-121844-juju-7f2275-prod-proposed-migration-environment-3-4f13bd91-fd36-4638-a6ad-77391b85e1a3 --image adt/ubuntu-xenial-arm64-server --keyname testbed-juju-7f2275-prod-proposed-migration-environment-3 --net-id=net_prod-proposed-migration -e TERM=linux -e ''"'"'http_proxy=http://squid.internal:3128'"'"'' -e ''"'"'https_proxy=http://squid.internal:3128'"'"'' -e ''"'"'no_proxy=127.0.0.1,127.0.1.1,login.ubuntu.com,localhost,localdomain,novalocal,internal,archive.ubuntu.com,ports.ubuntu.com,security.ubuntu.com,ddebs.ubuntu.com,changelogs.ubuntu.com,keyserver.ubuntu.com,launchpadlibrarian.net,launchpadcontent.net,launchpad.net,10.24.0.0/24,keystone.ps5.canonical.com,objectstorage.prodstack5.canonical.com'"'"'' --mirror=http://ftpmaster.internal/ubuntu/
  1s No nova image available that matches adt/ubuntu-xenial-arm64-server
  1s No UUID given. Instance won't be deleted!
  1s <VirtSubproc>: failure: setup script failed with code 1: /home/ubuntu/autopkgtest/ssh-setup/nova open --flavor autopkgtest --security-groups <email address hidden> --name adt-xenial-arm64-ubuntu-advantage-tools-20240524-121844-juju-7f2275-prod-proposed-migration-environment-3-4f13bd91-fd36-4638-a6ad-77391b85e1a3 --image adt/ubuntu-xenial-arm64-server --keyname testbed-juju-7f2275-prod-proposed-migration-environment-3 --net-id=net_prod-proposed-migration -e TERM=linux -e 'http_proxy=http://squid.internal:3128' -e 'https_proxy=http://squid.internal:3128' -e 'no_proxy=127.0.0.1,127.0.1.1,login.ubuntu.com,localhost,localdomain,novalocal,internal,archive.ubuntu.com,ports.ubuntu.com,security.ubuntu.com,ddebs.ubuntu.com,changelogs.ubuntu.com,keyserver.ubuntu.com,launchpadlibrarian.net,launchpadcontent.net,launchpad.net,10.24.0.0/24,keystone.ps5.canonical.com,objectstorage.prodstack5.canonical.com' --mirror=http://ftpmaster.internal/ubuntu/
  1s autopkgtest [12:28:59]: ERROR: testbed failure: unexpected eof from the testbed

Previous runs for 31.2.3~16.04 and even 32~16.04 more recently worked: https://autopkgtest.ubuntu.com/packages/ubuntu-advantage-tools/xenial/arm64