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Read Ubuntu packages from the Azure mirror, with retries, so a broken primary mirror can't fail image builds #1412

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Merged
davidmckayv merged 1 commit into from
Nov 10, 2026
Merged

Read Ubuntu packages from the Azure mirror, with retries, so a broken primary mirror can't fail image builds #1412

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7 changes: 7 additions & 0 deletions Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,13 @@ ENV BUN_INSTALL=/usr/local
ENV PATH="/usr/local/bin:${PATH}"
ENV DEBIAN_FRONTEND=noninteractive
ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
# Ubuntu's primary mirror can serve a package index that disagrees with its own release file for
# hours ("File has unexpected size ... Mirror sync in progress?"), and then every build here fails.
# The Azure mirror is public and kept in step, so apt reads from it unless UBUNTU_MIRROR says
# otherwise (arm64 reads ports.ubuntu.com, which this leaves alone). Retries cover a dropped download.
ARG UBUNTU_MIRROR=http://azure.archive.ubuntu.com/ubuntu
RUN sed -i "s#http://archive.ubuntu.com/ubuntu/\?#${UBUNTU_MIRROR}/#; s#http://security.ubuntu.com/ubuntu/\?#${UBUNTU_MIRROR}/#" /etc/apt/sources.list.d/ubuntu.sources \
&& printf 'Acquire::Retries "5";\n' > /etc/apt/apt.conf.d/80-retries
COPY --from=node-toolchain /usr/local /usr/local
COPY --from=bun-toolchain /usr/local/bin/bun /usr/local/bin/bun
# `--no-shell` and the bunx cache: see agent-computer/Dockerfile, which installs the same browser.
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7 changes: 7 additions & 0 deletions agent-computer/Dockerfile
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Expand Up @@ -34,6 +34,13 @@ ENV BUN_INSTALL=/usr/local
ENV PATH="/usr/local/bin:${PATH}"
ENV DEBIAN_FRONTEND=noninteractive
ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
# Ubuntu's primary mirror can serve a package index that disagrees with its own release file for
# hours ("File has unexpected size ... Mirror sync in progress?"), and then every build here fails.
# The Azure mirror is public and kept in step, so apt reads from it unless UBUNTU_MIRROR says
# otherwise (arm64 reads ports.ubuntu.com, which this leaves alone). Retries cover a dropped download.
ARG UBUNTU_MIRROR=http://azure.archive.ubuntu.com/ubuntu
RUN sed -i "s#http://archive.ubuntu.com/ubuntu/\?#${UBUNTU_MIRROR}/#; s#http://security.ubuntu.com/ubuntu/\?#${UBUNTU_MIRROR}/#" /etc/apt/sources.list.d/ubuntu.sources \
&& printf 'Acquire::Retries "5";\n' > /etc/apt/apt.conf.d/80-retries
COPY --from=node-toolchain /usr/local /usr/local
COPY --from=bun-toolchain /usr/local/bin/bun /usr/local/bin/bun
# `--no-shell`: every launch names a Chromium channel (`browser-runtime.ts`), and Playwright runs
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