emr-serverless-setup

# EMR Serverless Setup Use this skill when `datus emr-serverless` is installed but has no configured environment. ## Config structure Profiles live under `agent.plugins.emr-serverless.<profile>` in the config file named by the `## Plugins` section of the system prompt: ```yaml agent: plugins: emr-serverless: prod: default: true region: us-east-1 application_id: 00abc123 # optional default application execution_role_arn: arn:aws:iam::123456789012:role/emr-serverless-exec # optional default # credentials — omit to use the standard AWS chain, otherwise any of: profile: my-aws-profile role_arn: arn:aws:iam::123456789012:role/datus-emr # access_key_id / secret_access_key — use ${VAR} refs ``` ## Steps 1. Ask for `region`, and optionally a default `application_id` and `execution_role_arn` (the role the Spark job assumes to read/write data). 2. The calling principal needs `emr-serverless:GetApplication`, `ListApplications`, `StartApplication`, `StopApplication`, `StartJobRun`, `GetJobRun`, `ListJobRuns`, `CancelJobRun`, `GetDashboardForJobRun`, and `iam:PassRole` for the execution role. 3. Write the profile into the config file named in the `## Plugins` preamble; mark the first profile `default: true`. 4. Verify with `datus emr-serverless applications list`. ## Troubleshooting - `no application id` / `no execution role` — pass them as args, or set `application_id` / `execution_role_arn` in the profile. - Job stuck in `SCHEDULED` — the application may be stopped; run `applications start <app-id>`.