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chore(deps): update mirror.gcr.io/library/ubuntu docker tag to v26#14138

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chore(deps): update mirror.gcr.io/library/ubuntu docker tag to v26#14138
renovate-bot wants to merge 1 commit intoGoogleCloudPlatform:mainfrom
renovate-bot:renovate/mirror.gcr.io-library-ubuntu-26.x

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This PR contains the following updates:

Package Type Update Change
mirror.gcr.io/library/ubuntu final major 24.0426.04

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@renovate-bot renovate-bot requested review from a team as code owners May 6, 2026 19:07
@trusted-contributions-gcf trusted-contributions-gcf Bot added kokoro:force-run Add this label to force Kokoro to re-run the tests. owlbot:run Add this label to trigger the Owlbot post processor. labels May 6, 2026
@product-auto-label product-auto-label Bot added the samples Issues that are directly related to samples. label May 6, 2026
@kokoro-team kokoro-team removed the kokoro:force-run Add this label to force Kokoro to re-run the tests. label May 6, 2026
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Code Review

This pull request updates the Ubuntu base image in the Dockerfile from version 24.04 to 26.04. The review feedback correctly identifies that Ubuntu 26.04 is not a valid stable release and will cause the Docker build to fail, recommending a revert to the 24.04 LTS version.

Comment thread .kokoro/docker/Dockerfile
# We want to use LTS ubuntu from our mirror because dockerhub has a
# rate limit.
FROM mirror.gcr.io/library/ubuntu:24.04
FROM mirror.gcr.io/library/ubuntu:26.04
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high

The Ubuntu image tag 26.04 is not a valid stable release version. Ubuntu LTS releases follow a biennial cycle (e.g., 22.04, 24.04), and 26.04 is not currently available in the mirror.gcr.io or official repositories. This change will cause the Docker build to fail with a "manifest not found" error. It is recommended to revert to the 24.04 LTS release.

FROM mirror.gcr.io/library/ubuntu:24.04

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