The company I work for uses Amazon ECS.
There are 5 or more production clusters configured there and there was some problem last week and AWS support team recommended us to change the ECS instance ami to an "Ubuntu ECS optimized" ami.
I'd like to go through all the clusters and replace the currently used ami with the ecs-optimized ami but I'm not sure what's the best way to approach this task.
There can be no downtime of any of the clusters.
How would you have done it?