yum fails on ecs ami

Question

I have an instance on a public IP. This instance is running the latest ecs optimized AMI. The instance fails to run yum. It has the following error:  
```  
Loaded plugins: priorities, update-motd, upgrade-helper  
Could not retrieve mirrorlist http://repo.us-west-2.amazonaws.com/nightly/main/mirror.list error was  
14: HTTP Error 403 - Forbidden  
```  
Even if I curl on my local computer at home:  
curl -sL http://repo.us-west-2.amazonaws.com/nightly/main/mirror.list  
  
From anywhere comes back as Forbidden. And yes, I can CURL https://www.google.com and ping 8.8.8.8 just fine on the instance itself. Just can't run yum to update and install packages.  
  
All my ec2 linux ami's are failing to build

Answer

We have identified an issue in ECS optimized AMI: amzn-ami-2018.03.20191014-amazon-ecs-optimized, where calls for yum update will fail. We have fixed this issue and released new AMIs. Please update to the latest ECS optimized AMI: amzn-ami-2018.03.20191016-amazon-ecs-optimized.

yum fails on ecs ami

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