Postmortem: Global VSTS availability issues – 22 May 2018

Azure DevOps SREMay 25, 2018May 25, 201805/25/18

Customer Impact: On 22 May 2018, Visual Studio Team Services (VSTS) experienced a major incident across multiple regions between 15:00 and 16:55 UTC.  An event in a Western European scale unit of the Team Foundation Service (TFS), caused a chain reaction that sporadically took other TFS scale units offline in other regions.  Based on our te