ECS Throttling Improvements
This caches all ECS Describe* API calls to eliminate ECS API throttling.
DescribeTaskDefinition calls are cached for 24h since a task definition is immutable. DescribeContainerInstances and DescribeTasks are cached for 5 and 10 seconds respectively. In environments with frequent convox ps, convox rack, convox scale, etc. calls, this will reduce the number of calls that get through to the AWS API and therefore reduce AWS API rate limiting
Build Instance Options
A new BuildVolumeSize parameter is introduced and the BuildMemory parameter is turned into a soft limit. This enables faster and/or more concurrent builds on a build instance.
For example you can enables the fastest EBS baseline performance (docs) for up to 60 concurrent builds with:
- BuildInstance=c4.4xlarge
- BuildMemory=512
- BuildVolumeSize=1000
Health Check Thresholds
This adds two optional Docker Compose configuration labels:
- convox.health.threshold.healthy
- convox.health.threshold.unhealthy
Heathy Threshold and the Unhealthy Threshold on a service’s ELB: http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-healthchecks.html
Valid values are 2-10. If no label is set the default value of 2 is used.