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Update mirror.gcr.io/library/ubuntu Docker tag to v26#14432

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Update mirror.gcr.io/library/ubuntu Docker tag to v26#14432
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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 requested review from a team as code owners July 17, 2026 20:16
@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 Jul 17, 2026
@product-auto-label product-auto-label Bot added the samples Issues that are directly related to samples. label Jul 17, 2026
@kokoro-team kokoro-team removed the kokoro:force-run Add this label to force Kokoro to re-run the tests. label Jul 17, 2026

@gemini-code-assist gemini-code-assist Bot left a comment

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Code Review

This pull request updates the base Ubuntu image in the Dockerfile from version 24.04 to 26.04. However, since Ubuntu 26.04 is not yet released, this tag does not exist and will cause the Docker build to fail. It is recommended to revert this change and continue using the stable 24.04 release.

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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critical

Ubuntu 26.04 LTS is not yet released (scheduled for April 2026). Attempting to build this Dockerfile will fail because the 26.04 tag does not exist on the registry. Please revert this change to use the stable 24.04 release.

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

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