Pin ECS agent version on AL2 AMIs after EOL - #749
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AL2 reached EOL on 2026-06-30. New ECS features are no longer supported on AL2 and the ECS agent version is pinned. Previously AL2 and AL2023 shared a single ecs_agent_version variable, so any AL2023 agent bump automatically flowed into AL2. Decouple them following the docker_version pattern. - Add pinned ecs_agent_version_al2 and ecs_init_rev_al2 variables; the existing ecs_agent_version/ecs_init_rev now belong to AL2023 and keep auto-updating. - Point all AL2 recipes and the shared build provisioner at the pinned al2-specific variables. - generate-release-vars.sh reads the pinned al2 variables for the al2 branch. - check-update.sh rebuilds AL2 only on a new base AMI; security-only and GPU/NVIDIA-only updates no longer trigger AL2 builds. AL2023 unchanged. - generate-changelog.sh reports al2 and al2023 ECS versions independently now that they can differ. Assisted-by: Claude Code:claude-opus-4-8 Signed-off-by: Cameron Sparr <sparrc@users.noreply.github.com>
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Summary
AL2 reached EOL on 2026-06-30. New ECS features are no longer supported on AL2 and the ECS agent version is pinned. Previously AL2 and AL2023 shared a single ecs_agent_version variable, so any AL2023 agent bump automatically flowed into AL2. Decouple them following the docker_version pattern.
Assisted-by: Claude Code:claude-opus-4-8
Testing
make validatepasses to ensure new al2 variable is present in all recipesecs_agent_versionand verified this doesnt generate a new diff for AL2./scripts/check-update.sh al2when there is and isnt an update to the base ami and verified correct outputDescription for the changelog
Licensing
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.