GitHub Actions: The Ubuntu 18.04 Actions runner image is being deprecated and will be removed by 12/1/22

The Ubuntu 18.04 Actions runner image started our deprecation process on 8/8/22 and will be fully unsupported by 12/1/22. To raise awareness of the upcoming removal, jobs using Ubuntu 18.04 will temporarily fail during scheduled time periods defined below:

  • October 3, 12:00 UTC – October 3, 14:00 UTC
  • October 18, 14:00 UTC – October 18, 16:00 UTC
  • November 15, 18:00 UTC – November 15, 20:00 UTC
  • November 30, 20:00 UTC – November 30, 22:00 UTC
  • December 15, 20:00 UTC – December 16 00:00 UTC
  • January 5, 10.00 UTC – January 5, 14.00 UTC
  • January 13, 12.00 UTC – January 13, 16.00 UTC
  • January 18, 14.00 UTC – January 18, 18.00 UTC
  • January 24, 16.00 UTC – January 24, 20.00 UTC
  • February 7, 16.00 UTC – February 7, 22.00 UTC
  • February 21, 10.00 UTC – February 21, 22.00 UTC
  • March 6, 00.00 UTC – March 7, 00.00 UTC
  • March 13, 00.00 UTC – March 14, 00.00 UTC
  • March 21, 00.00 UTC – March 22, 00.00 UTC
  • March 28, 00.00 UTC – March 29, 00.00 UTC

What you need to do

Workflows using the ubuntu-18.04 YAML workflow label should be updated to ubuntu-20.04, ubuntu-22.04, or ubuntu-latest. You can always get up-to-date information on our tools by reading about the software in GitHub Actions virtual environments. Please contact GitHub Support.

*update: we extended the deprecation schedule until April 2023 with updated dates for brownouts.

GitHub Actions: Self-hosted runners now support Apple M1 hardware

Actions runner support for Apple silicon hardware, such as the M1 chip, is now generally available. This provides teams with the capability to run self-hosted macOS workflows in a macOS ARM64 runtime. Now the Actions runner supports M1 and the ARM64 runtime meaning developers can run it on their own M1 or M2 hardware.

Based on initial testing, there are currently two issues to be aware of:

  • macOS ARM64 does not support node12. Therefore, the runner will automatically use node16 to execute any javascript Action written for node12.
  • All actions provided by GitHub are compatible with the runner except for a known issue with setup-python. The fix for that can be tracked here.

For additional information on how to set up a self-hosted macOS ARM64 runner, please refer to our documentation. If you have any feedback or questions for Actions self-hosted Apple silicon support, you can submit an issue in the runner repository.

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Warning users about account relinking during SAML SSO

When users access an organization with SAML SSO, GitHub stores a link between the SAML identity and the user's GitHub account. This link is used by SCIM and team synchronization to grant access within your organization or enterprise. If you break this link by signing into that organization with a different SAML identity, you are likely to lose access to resources inside that organization.

Starting gradually today and being fully rolled out tomorrow, users will see a warning message if they attempt to sign in with a different SAML account and change their linked identity. They'll have the option to go back to their IdP to sign in with a different account, which is usually the correct option. If they really intend to break the link to their previous SAML account and link to a new one, they can choose to continue.

Learn more by reading "About Authentication with SAML SSO".

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