Ona AWS Runner Failed: ROLLBACK_COMPLETE and ECS Circuit Breaker Errors

Q: How do I fix "Ona AWS Runner Failed: ROLLBACK_COMPLETE and ECS Circuit Breaker Errors"?

1. Fix stack parameters: Select a VPC, at least one availability zone, and subnets in multiple AZs Redeploy the stack 2. Fix connectivity: Public subnets route to an Internet Gateway, private to a NAT Gateway Add VPC endpoints for Secrets Manager, S3 and ECR for private subnets Allow outbound HTTPS in security groups Force a new ECS deployment, then confirm Connected under Settings > Runners

Workaround available AWS Updated November 14, 2026How we research

Quick answer

Most AWS runner failures are network misconfiguration. Select a VPC, subnets across multiple AZs, and make sure outbound connectivity (IGW or NAT plus endpoints) exists.

Most likely fix: Fix stack parameters

How to fix it

Try these in order — the most common fix is first.

1. Fix stack parameters
1. Select a VPC, at least one availability zone, and subnets in multiple AZs
2. Redeploy the stack
Did this fix it?
2. Fix connectivity
1. Public subnets route to an Internet Gateway, private to a NAT Gateway
2. Add VPC endpoints for Secrets Manager, S3 and ECR for private subnets
3. Allow outbound HTTPS in security groups
4. Force a new ECS deployment, then confirm Connected under Settings > Runners
Did this fix it?

Symptoms

CloudFormation ends in ROLLBACK_COMPLETE, or the runner task shows CREATE_FAILED with ECS Deployment Circuit Breaker was triggered.

Why it happens

Missing or invalid VPC/subnet selections (parameter value for EC2RunnerInstancesSubnet does not exist)
No outbound connectivity: ResourceInitializationError
Private subnets lacking VPC endpoints for Secrets Manager, S3, ECR

This guide also covers

ona runner rollback_complete
ecs deployment circuit breaker gitpod
gitpod aws runner not working

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