# Upcoming Elastic Stack v4

**URL:** <https://forum.buildkite.community/t/upcoming-elastic-stack-v4/78>\
**Category:** Elastic CI Stack for AWS\
**Created:** [November 19, 2018, 5:06am UTC](https://forum.buildkite.community/t/upcoming-elastic-stack-v4/78 "2018-11-19T05:06:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anon18197598](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@anon18197598](https://forum.buildkite.community/u/anon18197598)\
**Post date:** [November 19, 2018, 5:06am UTC](https://forum.buildkite.community/t/upcoming-elastic-stack-v4/78/1 "2018-11-19T05:06:05Z")

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We’ve had release candidates running for Elastic Stack v4 for quite some time now, and soon we’ll release a stable version.

This is a fairly minor release to introduce a new underlying operating system in the AMI and some minor breaking changes to parameters.

## Whats new?

- [Amazon Linux 2 LTS](https://aws.amazon.com/about-aws/whats-new/2017/12/introducing-amazon-linux-2/)
- Updated docker, docker-compose and aws-cli versions
- Updated lifecycled which fixes an issue where queues weren’t properly cleaned up
- Added a `BuildkiteAgentTimestampLines` parameter for setting the timestamps configuration in the agent
- Added a `InstanceCreationTimeout` for configuring instance creation timeouts
- Git LFS support

## Breaking changes

- Parameter `KeyName` is now a string, and optional
- Parameter `ManagedPolicyARN` now supports comma-delimited ARNs for multiple policies

Check out the final release candidate, which will be promoted to the final: [https://github.com/buildkite/elastic-ci-stack-for-aws/releases/tag/v4.0.0-rc3](https://github.com/buildkite/elastic-ci-stack-for-aws/releases/tag/v4.0.0-rc3)

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<div class="post-metadata">

**Author:** ![anon18197598](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@anon18197598](https://forum.buildkite.community/u/anon18197598)\
**Post date:** [November 28, 2018, 1:09am UTC](https://forum.buildkite.community/t/upcoming-elastic-stack-v4/78/2 "2018-11-28T01:09:24Z")

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We’ve released it here [https://github.com/buildkite/elastic-ci-stack-for-aws/releases/tag/v4.0.0](https://github.com/buildkite/elastic-ci-stack-for-aws/releases/tag/v4.0.0)