ubuntu_lxc - "ERROR: Unable to fetch GPG key from keyserver" with SUT in certain domain (hypermaas/Intel MAAS)

[Po-Hsu Lin]

Failing sub-tests:
 * lxc-test-apparmor-mount
 * lxc-test-autostart
 * lxc-test-no-new-privs (Bionic and newer)
 * lxc-test-unpriv
 * lxc-test-usernic (Xenial and older)
 * api_test.py

In bug 1916087, this issue on older releases (X/T variants) is because the GPG server must be changed by the test script. The old GPG server is not working anymore.

With newer release (>= Bionic), we're running tests from the lxc source package, and this changes has been made into the test script in lxc since Xenial so we should not see this issue anymore.

However we are still seeing this on newer releases, mostly on certain lab / cloud instead of our bare-metal maas, so I think it's related to network or firewall setting:
 * B-4.15
  - appleton (ARM64 on hypermaas)
  - starmie (ARM64 on hypermaas)
  - akis (AMD64 DGX on hypermass)
 * F-5.4
  - appleton (ARM64 on hypermaas)
  - blanka (AMD64 DGX on hypermass)
  - akis (AMD64 DGX on hypermass)
 * H-5.11
  - appleton (ARM64 on hypermaas)

Please track this issue here, with specifying the cloud / kernel / instance name with this issue.

[Po-Hsu Lin (cypressyew)]

Found with node akis 5.4.0-82.92 this cycle.

[Po-Hsu Lin (cypressyew)]

This issue can be found on Intel MAAS (autovm*, crdvm*) as well.

[Po-Hsu Lin (cypressyew)]

This issue does not exist on
  * f-azure-5.4-fips: 5.4.0-1086.91+fips1
  * f-azure-5.4: 5.4.0-1086.91

in sru-20220620

[Po-Hsu Lin (cypressyew)]

This issue does not exist on
  * f-5.4: 5.4.0-122.138

[Po-Hsu Lin (cypressyew)]

This issue does not exist on:
  * j-lowlatency: 5.15.0-41.44
  * j-realtime: 5.15.0-1016.16

This issue still exist on:
  * b-4.15: 4.15.0-189.200
  * b-5.4: 5.4.0-122.138~18.04.1

This bug cannot be retired yet.

[Po-Hsu Lin (cypressyew)]

This is affecting Bionic on openstack.