@Marvin If using Prefect Server Helm. How do I add Block types that aren't available through the UI but are supported integrations?

To add block types that aren't available through the UI but are supported integrations in Prefect Server Helm, you can follow these steps: 1. Install the Package: First, you need to install the package that contains the block types. This is done via

pip

. For example:

pip install prefect-<integration>

Replace

<integration>

with the specific integration you're interested in. 2. Register the Blocks: After installation, you can register the blocks you want to use with Prefect Cloud or a Prefect Server. Assuming you're using Prefect Server Helm, the registration process is through the Prefect Server's API, which may be different from the registration process in Prefect Cloud, and may require you to use the Prefect Python client or directly interact with the server's GraphQL API. 3. Creating Custom Block Types: If you want to add custom block types, you will need to define a class that subclasses

Block

. Here's a simplified example of creating a new custom block type:

python
   from prefect.blocks.core import Block

   class Cube(Block):
       edge_length_inches: float

       def get_volume(self):
           return self.edge_length_inches ** 3

       def get_surface_area(self):
           return 6 * self.edge_length_inches ** 2

You would define your custom block, include any necessary methods, and then instantiate and save your block:

python
   from prefect import flow

   rubiks_cube = Cube(edge_length_inches=2.25)
   rubiks_cube.save("rubiks-cube")

4. Use in Flows: After blocks are registered, you can access them both for configuring flow deployments and directly from within your flow code. Unfortunately, the precise commands or steps for registering blocks with a Helm-deployed Prefect Server are not specified in the documentation I found, but you can use the general guide above as a starting point. For more detailed information, I would recommend checking the Prefect community Slack or forums, or consult the Prefect Server's API documentation. Refer to the Prefect documentation on Blocks for general guidance on how to use blocks: - Blocks in Prefect For detailed instructions tailored to your Helm-deployed Prefect Server, you may need to look at specific documentation for the Helm chart or contact Prefect support.

@Marvin But there's no pip install in kubernetes installation

In a Kubernetes-based installation, such as when using Prefect Server with Helm, you typically would not run

pip install

directly as you would in a traditional Python environment. Instead, you would need to build the necessary Prefect integration into a Docker image that your Kubernetes cluster can run. Here's an approach you can consider: 1. Create a Custom Docker Image: Start by creating a Docker image that includes the necessary Prefect integration. This typically involves writing a

Dockerfile

that uses the official Prefect image as a base and then uses

pip install

to include your desired packages. 2. Register Blocks: You can register blocks from a Python module using the Prefect CLI with commands such as:

prefect block register --module my_custom_blocks

Or, if a block has been created in a

.py

file:

prefect block register --file my_block.py

This command is environment-specific, so you would need to run it in an environment where the Prefect CLI is installed and configured to communicate with your Prefect Server. 3. Update Helm Chart: Once your image is created, you would then configure your Helm chart to use this custom image for your workers or any other relevant Kubernetes resources that Prefect orchestrates. Here are the high-level steps you'd typically follow: - Write the Dockerfile with the necessary Prefect version and integrations. - Build and push the Docker image to a registry that Kubernetes can access. - Update your Helm chart to use your custom image instead of the default Prefect image. - Deploy or update your Prefect resources using the updated Helm chart. Please note that these are general instructions. Specifics will depend on the particularities of your Kubernetes environment, the integrations you're trying to add, and how you've configured your Prefect Server Helm chart. For further information, here are a few relevant links: - Blocks Catalog for prefect-gcp - Blocks in Prefect - Deploy a Worker Using Helm However, this information is not exhaustive, and it's recommended to consult the Prefect documentation or Prefect community for the most appropriate procedures for your specific use case.

@Marvin A solution is to activate venv locally, with prefect-server portforwarded then: 1. prefect config set PREFECT_API_URL=http://127.0.0.1:4200/api 2. pip install <https://prefecthq.github.io/prefect-sqlalchemy/#:~:text=pip%20install%20prefect%2Dsqlalchemy%7C&lt;example integration>> 3. prefect block register -m <https://prefecthq.github.io/prefect-sqlalchemy/#:~:text=prefect%20block%20register%20%2Dm%20prefect_sqlalchemy%7C&lt;example>>

Yes, that solution can certainly work for registering custom or third-party blocks with your local Prefect Server while it's port-forwarded to your machine. Here's a more detailed breakdown of the steps: 1. Port-Forward Prefect Server: If you haven't already, start a port-forwarding session so that your local machine can communicate with the Prefect Server hosted on your Kubernetes cluster:

sh
   kubectl port-forward --namespace <namespace> <prefect-server-pod> 4200:4200

2. Set Prefect API URL: Configure your local Prefect client to use the port-forwarded Prefect API server:

sh
   prefect config set PREFECT_API_URL=<http://127.0.0.1:4200/api>

3. Install Integration Package: Use

pip

within your local activated virtual environment to install the integration package. Make sure you replace

<integration>

with the actual name of the package you want to install:

sh
   pip install prefect-<integration>

4. Register Blocks: Register the new blocks with the Prefect Server. Make sure to replace

<module_name>

with the actual name of the Python module that contains the block definitions:

sh
   prefect block register --module <module_name>

Remember to adjust the placeholders

<namespace>

,

<prefect-server-pod>

,

<integration>

, and

<module_name>

with appropriate values for your environment. By following these steps, your local Prefect client will register the new blocks with the Prefect Server so that they can be used within your workflows. Once the blocks are registered, they should be visible and configurable within the Prefect UI.