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<@ULVA73B9P> What should I consider if planning to...
# ask-marvin
j
@Marvin What should I consider if planning to migrate ECS-hosted workers for Prefect Cloud server deployments from Prefect 2 to Prefect 3?
m
When planning to migrate ECS-hosted workers from Prefect 2 to Prefect 3, there are several considerations and steps you should be aware of: 1. Configuration File Changes: Prefect 3 introduces a new configuration system that utilizes 
pydantic-settings
. You can now define settings in a 
prefect.toml
or 
pyproject.toml
file. This change aims to make configurations more organized and portable across environments. It's important to update and test your configurations accordingly. 2. ECS Worker Setup: - Both Prefect 2 and 3 guide you to create an ECS task definition specifying the Docker image for the Prefect worker, along with CPU, memory, and command configurations. These configurations remain largely the same, but ensure that you are now using the Prefect 3 image (
prefecthq/prefect:3-latest
). - Prefect 3 documentation suggests configuring ECS work pools and experimenting with different setups like AWS Fargate or EC2 based on your job needs. 3. ECS Integration: Prefect integrates smoothly with AWS ECS by supporting both AWS Fargate and EC2. These integrations provide options for scalability and flexibility as ECS automatically administers container distribution across instances. 4. Deployment and Execution: - Ensure your flow deployments specify ECS work pools, which manage the execution environment for your tasks. - Consider using Prefect's cloud or a self-managed server instance to manage and deploy your flows effectively. - Experiment with infrastructure configurations on your ECS work pool or deploy levels to optimize performance. For detailed guidance, you can refer to the Prefect 3 ECS Worker Guide here: Prefect 3 ECS Guide. Migration often requires careful consideration of the differences in feature sets and configurations between major versions, so it's crucial to thoroughly test these changes in a staging environment before full implementation.
Migrating ECS-hosted workers for Prefect Cloud server deployments from Prefect 2 to Prefect 3 involves several key considerations to ensure a smooth transition: 1. Infrastructure Provisioning: - Prefect 3 introduces improved infrastructure provisioning capabilities. You can now use the 
--provision-infra
flag with the 
prefect work-pool create
command to automatically set up the necessary cloud resources, including ECS clusters, IAM roles, and networks, which streamlines the setup process. - Ensure your AWS CLI is updated and that you're authenticated with the necessary permissions to provision resources, such as creating ECS clusters and managing IAM roles. 2. Work Pool Management: - In Prefect 3, managing ECS work pools can include automatic infrastructure setup. Make use of the command 
prefect work-pool create --type ecs:push --provision-infra my-ecs-pool
to facilitate push-based executions with minimal manual configuration. - This command will automatically configure a new ECS work pool using AWS Fargate, coupled with necessary networking and security setups. 3. ECS Deployment Changes: - Ensure your ECS task definitions are updated to use the Prefect 3 Docker images. - Review and update IAM roles and permissions as per the Prefect 3 guide to use the newly supported features and adhere to best practices for security and resource management. 4. Prefect Cloud Integration: - Deployment to Prefect Cloud or self-managed Prefect servers involves similar steps to setting up infrastructure but includes additional attention to work pool configurations to ensure that they are optimized for Prefect 3. 5. Experimentation and Optimization: - Use the new capabilities to explore different deployment and execution configurations, such as varying CPU and memory allocations, or comparing AWS Fargate against EC2 for specific workloads. Refer to the Prefect 3 documentation for detailed steps on ECS setup and migration: Prefect 3 ECS Guide and Serverless Deployment Examples. These resources provide comprehensive instructions on setting up and deploying ECS workers within Prefect's newer framework.
n
hi @Jason Wiener - are you already using workers in 2.x?
i.e. not the "agent"
j
Yes. We are right now working off the 
prefecthq/prefect:2-python3.10
base image (because of a package that requires 3.10 or earlier). But we adopted Prefect after workers were an option so never used the first version of the agent (though the next-gen version in Prefect 3 looks interesting).
I remember at some point in the Prefect 3 roll out reading something that suggested Prefect Cloud was not yet compatible with Prefect 3 images but it seems like Prefect 3 works fine with Cloud now?
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