Degraded availability of Ubuntu's package archives affecting some Docker builds

Canonical has acknowledged this incident on their status page: https://status.canonical.com/#/incident/KNms6QK9ewuzz-7xUsPsNylV20jEt5kyKsd8A-3ptQGY_8VLJIlY9pR2kpwEEi6NCRNWqc5Ru503cC-LkjMQiA==, we'll continue to monitor availability and update this incident if the situation improves.

A temporary workaround can be added to your Dockerfile until registries recover:

Ubuntu 22.04 and earlier:

RUN sed -i 's%http://\(archive\|security\).ubuntu.com/%http://azure.archive.ubuntu.com/%g' /etc/apt/sources.list

Ubuntu 24.04 and later:

RUN sed -i 's%http://\(archive\|security\).ubuntu.com/%http://azure.archive.ubuntu.com/%g' /etc/apt/sources.list.d/ubuntu.sources

We're seeing degraded availability of Ubuntu's package archives, causing some Docker builds using them to fail.

• Workloads running on GitHub Actions are automatically rerouted to different mirrors.

• Docker builds using Ubuntu base images are seeing degraded performance and errors.