Covalent is a python based workflow orchestration tool used to execute HPC and quantum tasks in heterogenous environments.
By installing Covalent AWS Plugins users can leverage a broad plugin ecosystem to execute tasks using AWS resources best fit for each task.
Covalent AWS Plugins installs a set of executor plugins that allow tasks to be run in an EC2 instance, AWS Lambda, AWS ECS Cluster, AWS Batch Compute Environment, and as an AWS Braket Job for tasks requiring Quantum devices.
If you're new to covalent visit our Getting Started Guide.
To use the AWS plugin ecosystem with Covalent, simply install it with pip:
pip install "covalent-aws-plugins[all]"This will ensure that all the AWS executor plugins listed below are installed.
You may require Terraform to be installed to use the AWS EC2 plugin.
Please read our read the docs (RTD) guide for more detailed information about using AWS plugins.
While each plugin can be installed separately, covalent-aws-plugins pip package will automatically download all of the plugins listed below.
| Plugin Name | Use Case | |
|---|---|---|
 |
AWS Batch Executor | Useful for heavy compute workloads (high CPU/memory). Tasks are queued to execute in the user defined Batch compute environment. |
 |
AWS EC2 Executor | General purpose compute workloads where users can select compute resources. An EC2 instance is auto-provisioned using terraform with selected compute settings to execute tasks. |
 |
AWS Braket Executor | Suitable for Quantum/Classical hybrid workflows. Tasks are executed using a combination of classical and quantum devices. |
 |
AWS ECS Executor | Useful for moderate to heavy workloads (low memory requirements). Tasks are executed in an AWS ECS cluster as containers. |
 |
AWS Lambda Executor | Suitable for short lived tasks that can be parallalized (low memory requirements). Tasks are executed in serverless AWS Lambda functions. |
Firstly, import covalent.
import covalent as ctSecondly, define your executor(s) (expand any of the below plugins).
AWS Batch Executor
Read more about how to use this executor in our docs. Below are the basics of how it can be used.
executor = ct.executor.AWSBatchExecutor(
s3_bucket_name = "covalent-batch-qa-job-resources",
batch_job_definition_name = "covalent-batch-qa-job-definition",
batch_queue = "covalent-batch-qa-queue",
batch_execution_role_name = "ecsTaskExecutionRole",
batch_job_role_name = "covalent-batch-qa-job-role",
batch_job_log_group_name = "covalent-batch-qa-log-group",
vcpu = 2, # Number of vCPUs to allocate
memory = 3.75, # Memory in GB to allocate
time_limit = 300, # Time limit of job in seconds
)AWS EC2 Executor
Read more about how to use this executor in our docs. Below are the basics of how it can be used.
executor = ct.executor.EC2Executor(
instance_type="t2.micro",
volume_size=8, #GiB
ssh_key_file="~/.ssh/ec2_key"
)AWS Braket Executor
Read more about how to use this executor in our docs. Below are the basics of how it can be used.
executor = ct.executor.BraketExecutor(
s3_bucket_name="braket_s3_bucket",
ecr_repo_name="braket_ecr_repo",
braket_job_execution_role_name="covalent-braket-iam-role",
quantum_device="arn:aws:braket:::device/quantum-simulator/amazon/sv1",
classical_device="ml.m5.large",
storage=30,
)AWS ECS Executor
Read more about how to use this executor in our docs. Below are the basics of how it can be used.
executor = ct.executor.ECSExecutor(
s3_bucket_name="covalent-fargate-task-resources",
ecr_repo_name="covalent-fargate-task-images",
ecs_cluster_name="covalent-fargate-cluster",
ecs_task_family_name="covalent-fargate-tasks",
ecs_task_execution_role_name="ecsTaskExecutionRole",
ecs_task_role_name="CovalentFargateTaskRole",
ecs_task_subnet_id="subnet-000000e0",
ecs_task_security_group_id="sg-0000000a",
ecs_task_log_group_name="covalent-fargate-task-logs",
vcpu=1,
memory=2
)AWS Lambda Executor
Read more about how to use this executor in our docs. Below are the basics of how it can be used.
executor = ct.executor.AWSLambdaExecutor(
lambda_role_name="CovalentLambdaExecutionRole",
s3_bucket_name="covalent-lambda-job-resources",
timeout=60,
memory_size=512
)- Lastly, define a workflow to execute a particular task using one of the above executors
@ct.electron(
executor=executor
)
def compute_pi(n):
# Leibniz formula for π
return 4 * sum(1.0/(2*i + 1)*(-1)**i for i in range(n))
@ct.lattice
def workflow(n):
return compute_pi(n)
dispatch_id = ct.dispatch(workflow)(100000000)
result = ct.get_result(dispatch_id=dispatch_id, wait=True)
print(result.result)Which should output
3.141592643589326
Release notes are available in the Changelog.
Please use the following citation in any publications:
W. J. Cunningham, S. K. Radha, F. Hasan, J. Kanem, S. W. Neagle, and S. Sanand. Covalent. Zenodo, 2022. https://doi.org/10.5281/zenodo.5903364
Covalent is licensed under the Apache License 2.0. See the LICENSE file or contact the support team for more details.
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