This documentation covers Convox V2, our ECS-based engine. V2 is fully supported and actively maintained. Looking for the Kubernetes-based V3 engine? See docs.convox.com.
InstanceCount
The number of EC2 instances in your Rack cluster. This parameter is only used for clusters with HighAvailability set to true.
| Setting | Value |
|---|---|
| Default value | 3 |
| Minimum value | 3 |
Use Cases
- Increasing instance count to handle higher application workloads or run more containers
- Setting to a higher value when deploying multiple Services that require dedicated instance capacity
- Setting the cluster size by hand on a Rack with Autoscale set to
No
Additional Information
When HighAvailability is set to false, this parameter is not used. Instead, the NoHaInstanceCount parameter controls the cluster size, which has a minimum value of 1.
If Autoscale is enabled, the autoscaler sets this parameter itself based on workload demand, with a minimum of 3, and replaces a value you set on its next run. Set Autoscale=No to control the instance count by hand.
$ convox rack params set InstanceCount=5
See Also
