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Update docker-delegate-to-ecs-fargate.md #11845

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Update docker-delegate-to-ecs-fargate.md
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17 changes: 17 additions & 0 deletions docs/platform/delegates/install-delegates/docker-delegate-to-ecs-fargate.md
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Expand Up @@ -247,6 +247,23 @@ Use the following steps to create a task definition. For information about task
aws ecs create-service --cli-input-json file://service.json
```

## Optional: Add an ECS health check to auto-restart the delegate task

Harness does not currently manage ECS task health checks. To improve resiliency after network disruptions or outages, you can configure an ECS `healthCheck` on the delegate container so ECS can automatically restart the task if the delegate becomes unhealthy.
Example:
```json
"healthCheck": {
"command": ["CMD-SHELL", "curl -f http://localhost:3460/api/health || exit 1"],
"interval": 30,
"timeout": 5,
"retries": 3,
"startPeriod": 60
}
```
Notes:
- The delegate exposes a health endpoint on http://localhost:3460/api/health inside the container.
- Tune startPeriod if your delegate container takes longer to initialize in your environment.

## Deploy a delegate using Terraform

The above steps to [deploy a delegate to ECS](#deploy-a-delegate-to-amazon-ecs) are also available in a Terraform module that you can reference directly or use as a starting point for your own automation. You can use an existing ECS cluster (EC2- or Fargate-based) or let the module create one for you.
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