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Each week, the CMS Hybrid Cloud program provides a list of upcoming changes, maintenance windows, and updates to help customers build awareness and plan effectively and summarizes changes from the previous week.
This newsletter includes:
Completed change summary for the week of 5/21/2026
- 5/22/2026 - Upgrade Enterprise (OIT) TestRail to version 9.5 in PROD
- 5/23/2026 - DevOps Services Maintenance
- 5/23/2026 - Downscale Splunk Prod Indexers to 45 from 51
- 5/27/2026 - Non-marketplace PROD SSM Patching
- 5/27/2026 - MAG - Azure Update Manager Patching - PROD
- 5/27/2026 - Marketplace SSM Patching - IMPL
- 5/27/2026 - Azure Commercial - Azure Update Manager Patching - PROD
To learn details about previous changes please go to the News and Updates section on cloud.cms.gov. (Secure Access required)
For Patching and Gold Image release schedule please view: Patching and Gold Image Release Calendar - 2026
5/29/2026 - Migrate Splunk Search Heads and Deployer from AL2 to AL2023
Summary:
The current Search Heads and Deployer are on Amazon Linux 2 (AL2), which is approaching its end of life on June 30, 2026. Remaining on AL2 increases operational and security risk over time, so an upgrade to AL2023 is required.
Actions we are taking:
Migrating the existing 5 Search Heads and one Deployer to AL-2023.
When is this happening?
Start Time: Friday, 5/29/2026 at 5:00 p.m. ET.
End Time: Sunday, 5/31/2026 at 10:00 p.m. ET.
Who will be impacted?
All users logging to https://splunk.cloud.cms.gov/
What is the impact?
Splunk users can experience some latency when performing ad-hoc searches in ITOPS Splunk environment.
5/30/2026 - Enterprise Testing Services Maintenance
Summary:
In order to keep up to date with the latest versions and security advisories, the CMS Hybrid Cloud team will be performing maintenance updates on Enterprise Testing tools.
Actions we are taking:
- Upgrade Selenium Box to v5.2.2.
- Update Selenium Box Hub and Executors with the latest Amazon Linux 2023 Gold Image for CMS Cloud.
When is this happening?
Start time: Saturday, 5/30/2026 at 8:00 a.m. ET.
End time: Saturday, 5/30/2026 at 11:59 a.m. ET.
Who will be impacted?
All AWS Commercial and GovCloud customers of Selenium Box.
What is the impact?
Customers should expect downtime for the service as instances are restarted within the maintenance window.
Need help? We are here to support you.
If you have any questions, don't hesitate to reach out to your assigned Hosting Coordinator. CMS IT Support can be reached via cloudsupport@cms.hhs.gov, or call (800) 562-1963, and is documented here at Support Page on cloud.cms.gov.
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