Hello world

When you install Amazon Genomics CLI it will create a folder named agc. Inside there is an examples/demo-project folder containing an agc-project.yaml with some demo projects including a simple “hello world” workflow.

Running Hello World

  1. Ensure you have met the prerequisites and installed Amazon Genomics CLI
  2. Ensure you have followed the activation steps
  3. cd ~/amazon-genomics-cli/examples/demo-wdl-project
  4. agc context deploy --context myContext, this step takes approximately 5 minutes to deploy the infrastructure
  5. agc workflow run hello --context myContext, take note of the returned workflow instance ID.
  6. Check on the status of the workflow agc workflow status -r <workflow-instance-id>. Initially you will see status like SUBMITTED but after the elastic compute resources have been spun up and the workflow runs you should see something like the following: WORKFLOWINSTANCE myContext 9ff7600a-6d6e-4bda-9ab6-c615f5d90734 COMPLETE 2021-09-01T20:17:49Z

Congratulations! You have just run your first workflow in the cloud using Amazon Genomics CLI! At this point you can run additional workflows, including submitting several instances of the “hello world” workflow. The elastic compute resources will expand and contract as necessary to accommodate the backlog of submitted workflows.

Reviewing the Results

Workflow results are written to an S3 bucket specified or created by Amazon Genomics CLI during account activation. You can list or retrieve the S3 URI for the bucket with:

AGC_BUCKET=$(aws ssm get-parameter \
    --name /agc/_common/bucket \
    --query 'Parameter.Value' \
    --output text)

and then use aws s3 commands to explore and retrieve data from the bucket. Workflow output will be in the s3://agc-<account-num>-<region>/project/<project-name>/userid/<user-id>/context/<context-name>/workflow/<workflow-name>/ path. The rest of the path depends on the engine used to run the workflow. For Cromwell it will continue with: .../cromwell-execution/<wdl-wf-name>/<workflow-run-id>/<task-name>

If a workflow declares outputs then you may obtain these using the command:

agc workflow output <workflow_run_id>

You should see a response similar to:

OUTPUT	id	6cc6f742-dc87-4649-b319-1af45c4c09c6
OUTPUT	outputs.hello_agc.hello.out	Hello Amazon Genomics CLI!

You can also obtain task logs for a workflow using the following form agc logs workflow <workflow-name> -r <instance-id>.

Note, if the workflow did not actually run any tasks due to call caching then there will be no output from this command.

Cleaning Up

Once you are done with myContext you can destroy it with:

agc context destroy myContext

This will remove the cloud resources associated with the named context, but will keep any S3 outputs and CloudWatch logs.

If you want stop using Amazon Genomics CLI in your AWS account entirely, you need to deactivate it:

agc account deactivate

This will remove Amazon Genomics CLI’s core infrastructure. If Amazon Genomics CLI created a VPC as part of the activate process, it will be removed. If Amazon Genomics CLI created an S3 bucket for you, it will be retained.

To uninstall Amazon Genomics CLI from your local machine, run the following command:


Note uninstalling the CLI will not remove any resources or persistent data from your AWS account.

Next Steps