TRT has identified a likely regression in Metal IPv6 installations.  4.14 installs are statistically worse than 4.13. We are working on a new tool called Component Readiness that does cross-release comparisons to ensure nothing get worse. I think it has found something in metal.

At GA, 4.13 metal installs for ipv6 upgrade micro jobs were 100%.  They are now around 89% in 4.14.  All the failures seem to have the same mode where no workers come up, with PXE errors in the serial console.  

 !image-2023-06-06-10-13-13-310.png|thumbnail! 

You can view the report here:

https://sippy.dptools.openshift.org/sippy-ng/component_readiness/test_details?arch=amd64&baseEndTime=2023-05-16%2023%3A59%3A59&baseRelease=4.13&baseStartTime=2023-04-18%2000%3A00%3A00&capability=Other&component=Installer%20%2F%20openshift-installer&confidence=95&environment=ovn%20upgrade-micro%20amd64%20metal-ipi%20standard&excludeArches=arm64&excludeClouds=alibaba%2Cibmcloud%2Clibvirt%2Covirt&groupBy=cloud%2Carch%2Cnetwork&ignoreDisruption=true&ignoreMissing=false&minFail=3&network=ovn&pity=5&platform=metal-ipi&sampleEndTime=2023-06-06%2023%3A59%3A59&sampleRelease=4.14&sampleStartTime=2023-05-09%2000%3A00%3A00&testId=cluster%20install%3A0cb1bb27e418491b1ffdacab58c5c8c0&testName=install%20should%20succeed%3A%20overall&upgrade=upgrade-micro&variant=standard

The serial console on the workers shows PXE errors:

>>Start PXE over IPv4.
  PXE-E18: Server response timeout.
BdsDxe: failed to load Boot0001 "UEFI PXEv4 (MAC:00962801D023)" from PciRoot(0x0)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(00962801D023,0x1)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0): Not Found

>>Start PXE over IPv6..
  Station IP address is FD00:1101:0:0:2EE1:8456:96FB:68B1
  Server IP address is FD00:1101:0:0:0:0:0:3
  NBP filename is snponly.efi
  NBP filesize is 0 Bytes
  PXE-E18: Server response timeout.
BdsDxe: failed to load Boot0002 "UEFI PXEv6 (MAC:00962801D023)" from PciRoot(0x0)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(00962801D023,0x1)/IPv6(0000:0000:0000:0000:0000:0000:0000:0000,0x0,Static,0000:0000:0000:0000:0000:0000:0000:0000,0x40,0000:0000:0000:0000:0000:0000:0000:0000): Not Found

>>Start HTTP Boot over IPv4.
  Error: Could not retrieve NBP file size from HTTP server.

  Error: Server response timeout.
BdsDxe: failed to load Boot0003 "UEFI HTTPv4 (MAC:00962801D023)" from PciRoot(0x0)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(00962801D023,0x1)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)/Uri(): Not Found

>>Start HTTP Boot over IPv6..
  Error: Could not retrieve NBP file size from HTTP server.

  Error: Remote boot cancelled.
BdsDxe: failed to load Boot0004 "UEFI HTTPv6 (MAC:00962801D023)" from PciRoot(0x0)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(00962801D023,0x1)/IPv6(0000:0000:0000:0000:0000:0000:0000:0000,0x0,Static,0000:0000:0000:0000:0000:0000:0000:0000,0x40,0000:0000:0000:0000:0000:0000:0000:0000)/Uri(): Not Found
BdsDxe: No bootable option or device was found.
BdsDxe: Press any key to enter the Boot Manager Menu.

4.14

10%

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Example failures:
https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.14-e2e-metal-ipi-upgrade-ovn-ipv6/1665428719952465920

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.14-e2e-metal-ipi-upgrade-ovn-ipv6/1664711616538611712

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.14-e2e-metal-ipi-upgrade-ovn-ipv6/1664645418744549376

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.14-e2e-metal-ipi-upgrade-ovn-ipv6/1663915360878858240