Great article. The Sysdig team really knows how to root cause tough problems. The Sysdig tools can be invaluable for getting and making sense of low level data.<p>If you want to play with ELBs, rolling deploys, connection draining to ECS containers, I humbly submit the open source Convox project I am working on.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;convox&#x2F;rack" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;convox&#x2F;rack</a><p>It sets up a peer reviewed, production tested batteries-included VPC, ECS, ASG, ELB, etc cluster in minutes.<p>If the conclusion of this Sysdig post was that you always need to run 2 instances per AZ for the best reliability, I would strongly consider adding that knowledge into the tools either as a default or a production check.<p>Since it sounds like an ELB bug I&#x27;ll keep the 3 instances in 3 AZs default.