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Switch ecs cluster to ARM64/graviton - #16545

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Switch ecs cluster to ARM64/graviton#16545
jorgeazevedo wants to merge 4 commits into
mainfrom
ja-switch-to-arm

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@jorgeazevedo

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The ECS task definition previously defaulted to X86_64 while the EC2 ASG already ran on Graviton. Build the image natively on an ARM runner and set the Fargate CPU architecture to match.

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Before After
before after

The ECS task definition previously defaulted to X86_64 while the EC2 ASG
already ran on Graviton. Build the image natively on an ARM runner and set
the Fargate CPU architecture to match.
@jorgeazevedo jorgeazevedo added the feature Departmental tracking: work on a new feature label Aug 11, 2026
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github-actions Bot commented Aug 11, 2026

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Bumping the shared catalog entry also changed the `gu:cdk:version` metadata
baked into the ab-testing CDK snapshots, breaking their tests. Those stacks
don't need the canary, so pin it on the dotcom-rendering package instead.
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