Breaking changes

We have started the deprecation process for Ubuntu 18.04. While the image is being deprecated, You may experience longer queue times during peak usage hours. Deprecation will begin on 2022/08/08 and the image will be fully unsupported by 2023/04/03

To raise awareness of the upcoming removal, we will temporarily fail jobs using Ubuntu 18.04. Builds that are scheduled to run during the brownout periods will fail. The brownouts are scheduled for the following dates and times:

GitHub Actions\Azure DevOps::

• 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

Target date

April 1st, 2023

The motivation for the changes

We maintain the latest two stable versions of any given OS version. Ubuntu 22.04 is going GA on 8/8/22 thus we start deprecating the oldest image.

Possible impact

Workflows using the ubuntu-18.04 image label should be updated to ubuntu-latest, ubuntu-20.04, or ubuntu-22.04

Platforms affected

• Azure DevOps
• GitHub Actions

Virtual environments affected

• Ubuntu 18.04
• Ubuntu 20.04
• Ubuntu 22.04
• macOS 10.15
• macOS 11
• macOS 12
• Windows Server 2019
• Windows Server 2022

Mitigation ways

N\A