Merge pull request #1492 from buildkite/chore/agent-scaler_1.9.5

Author: scadu

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v6.40.3](https://github.com/buildkite/elastic-ci-stack-for-aws/compare/v6.40.2...v6.40.3) (2025-06-25)
+### Added
+- feat: pave road to resource limit control [#1481](https://github.com/buildkite/elastic-ci-stack-for-aws/pull/1481) ([scadu](https://github.com/scadu))
+
+### Internal
+- chore: add cfn-lint to the pipeline [#1491](https://github.com/buildkite/elastic-ci-stack-for-aws/pull/1491) ([scadu](https://github.com/scadu))
+- Add link from build badge in README [#1490](https://github.com/buildkite/elastic-ci-stack-for-aws/pull/1490) ([sj26](https://github.com/sj26))
+- Update EC2 README after AWS section change in Docs [#1489](https://github.com/buildkite/elastic-ci-stack-for-aws/pull/1489) ([karensawrey](https://github.com/karensawrey))
+
 ## [v6.40.2](https://github.com/buildkite/elastic-ci-stack-for-aws/compare/v6.40.1...v6.40.2) (2025-06-11)
 - fix: update agent-scaler to 1.9.4 [#1487](https://github.com/buildkite/elastic-ci-stack-for-aws/pull/1487) ([scadu](https://github.com/scadu))
 

README.md

@@ -60,15 +60,15 @@ aws cloudformation deploy --template-file templates/service-role.yml --stack-nam
 
 The Elastic CI Stack includes configurable systemd resource limits to prevent resource exhaustion. These limits can be configured using CloudFormation parameters:
 
-| Parameter | Description | Default |
-|-----------|-------------|---------|
+| Parameter                          | Description                                            | Default |
+|------------------------------------|--------------------------------------------------------|---------|
 | `ExperimentalEnableResourceLimits` | Enable systemd resource limits for the Buildkite agent | `false` |
-| `ResourceLimitsMemoryHigh` | MemoryHigh limit (e.g., '90%' or '4G') | `90%` |
-| `ResourceLimitsMemoryMax` | MemoryMax limit (e.g., '90%' or '4G') | `90%` |
-| `ResourceLimitsMemorySwapMax` | MemorySwapMax limit (e.g., '90%' or '4G') | `90%` |
-| `ResourceLimitsCPUWeight` | CPU weight (1-10000) | `100` |
-| `ResourceLimitsCPUQuota` | CPU quota (e.g., '90%') | `90%` |
-| `ResourceLimitsIOWeight` | I/O weight (1-10000) | `80` |
+| `ResourceLimitsMemoryHigh`         | MemoryHigh limit (e.g., '90%' or '4G')                 | `90%`   |
+| `ResourceLimitsMemoryMax`          | MemoryMax limit (e.g., '90%' or '4G')                  | `90%`   |
+| `ResourceLimitsMemorySwapMax`      | MemorySwapMax limit (e.g., '90%' or '4G')              | `90%`   |
+| `ResourceLimitsCPUWeight`          | CPU weight (1-10000)                                   | `100`   |
+| `ResourceLimitsCPUQuota`           | CPU quota (e.g., '90%')                                | `90%`   |
+| `ResourceLimitsIOWeight`           | I/O weight (1-10000)                                   | `80`    |
 
 ### Example Configuration
 

templates/aws-stack.yml

@@ -199,14 +199,14 @@ Parameters:
     Default: arn:aws:serverlessrepo:us-east-1:172840064832:applications/buildkite-agent-scaler
 
   BuildkiteAgentScalerVersion:
-    Description: Version of the buildkite-agent-scaler to use
+    Description: "Version of the buildkite-agent-scaler to use."
     Type: String
     AllowedPattern: '^(?:(?:[2-9]|[1-9]\d+)\.\d+\.\d+|1\.(?:[1-9]\d+\.\d+|9\.[1-9]\d*))$'
     ConstraintDescription: "The agent scaler release must be greater than 1.9.0 as a new parameter was introduced in 1.9.1"
-    Default: "1.9.4"
+    Default: "1.9.5"
 
   ScalerEnableExperimentalElasticCIMode:
-    Description: "[EXPERIMENTAL] Enable the Elastic CI Mode with enhanced features like safety checks, agent sorting, dangling instance detection, and graceful termination"
+    Description: "[EXPERIMENTAL] Enable the Elastic CI Mode with enhanced features like safety checks, agent sorting, dangling instance detection, and graceful termination. Available since BuildkiteAgentScalerVersion 1.9.3"
     Type: String
     AllowedValues:
         - "true"