fix(runners): pin Prod arm-mac ASG launch template versions to avoid recycling instances - #1122
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shashank-boyapally merged 1 commit intoSep 10, 2026
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…recycling instances The Prod arm-mac runner ASGs are stored behind their launch template's LatestVersionNumber (stuck at v14/v4/v17/v4 after failed deploys while latest advanced). Any deploy that tracks LatestVersionNumber jumps the ASG's launch template version and triggers a rolling replacement of the running mac2.metal instances onto scarce dedicated-host capacity - which wedged Production-ASG-mac-finch-15-armStack in UPDATE_ROLLBACK_FAILED. Add an optional RunnerType.launchTemplateVersion that pins the ASG to an exact launch template version instead of tracking the latest. Set it for the four Prod arm-mac runners to their currently-running versions (mac2.metal) so a deploy leaves the ASG's LaunchTemplateSpecification unchanged and does not recycle instances. Beta/Release keep the prior track-latest behavior. Dedicated hosts remain retained (auto-release-host=false) and desired stays 1. Signed-off-by: ShashankReddy Boyapally <shasboy@amazon.com>
sondavidb
approved these changes
Sep 10, 2026
smandhada16
approved these changes
Sep 10, 2026
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The Prod arm-mac runner ASGs are stored behind their launch template's LatestVersionNumber (stuck at v14/v4/v17/v4 after failed deploys while latest advanced). Any deploy that tracks LatestVersionNumber jumps the ASG's launch template version and triggers a rolling replacement of the running mac2.metal instances onto scarce dedicated-host capacity - which wedged Production-ASG-mac-finch-15-armStack in UPDATE_ROLLBACK_FAILED.
Add an optional RunnerType.launchTemplateVersion that pins the ASG to an exact launch template version instead of tracking the latest. Set it for the four Prod arm-mac runners to their currently-running versions (mac2.metal) so a deploy leaves the ASG's LaunchTemplateSpecification unchanged and does not recycle instances. Beta/Release keep the prior track-latest behavior.
Dedicated hosts remain retained (auto-release-host=false) and desired stays 1.
Issue #, if available:
Description of changes:
Testing done:
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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.