Hello ! a few months ago I had issues with deploying Prefect Server with a ECS and a private Docker storage. As its all working well now I wrote a tutorial on the steps I had to follow, hoping it might help anyone needed this particular configuration too 🙂 Here's the article : https://towardsdatascience.com/deploying-prefect-server-with-aws-ecs-fargate-and-docker-storage-36f633226c5f

So… this is pretty much the opposite of “what I got”, but: I’m lucky enough to start from zero with prefect and I know it is easy to forget what we found to be confusing, so in my “prefect hello world” repo I made sure the readme included my thoughts as I created an account and went along with the getting started resources. Just in case anyone finds it useful. It is an honest attempt to record my first impression: https://github.com/radbrt/prefect_pipeline. I’m happy to add to the documentation once I get a little experience.

Just did a presentation in my company about prefect. All the slide (as Jupyter notebook) and code is available on my github. Please enjoy and feel free to use it if you have a presentation to do. https://github.com/davzucky/prefect_presentation

Just published a blog about connecting Prefect to a Dask cluster using Coiled for processing larger-than-memory Tasks and/or Flows. https://towardsdatascience.com/scaling-your-prefect-workflow-to-the-cloud-2dec4e0b213b

Here is an updated AWS ECS Fargate walkthrough: https://towardsdatascience.com/how-to-cut-your-aws-ecs-costs-with-fargate-spot-and-prefect-1a1ba5d2e2df.  It can be useful, if: • you face some issues configuring your Prefect ECS agent (especially permissions), • you want to use spot instances to save costs,  • you want to automate agent deployment for different environments (staging, dev, prod).

Hello! I want to share with you a blog post about SoaM, a Prefect based library created by Mutt Data. We use a lot that forecasting framework because we defined a base code based on the experience of our previous projects. https://www.linkedin.com/posts/mutt-data_soam-public-release-activity-6843922592252932096-kM8u

Hi everybody, I have just written an article on how to orchestrate a data science project with Prefect: https://towardsdatascience.com/orchestrate-a-data-science-project-in-python-with-prefect-e69c61a49074#67c1-8f85fb1cfe73

Hey everyone! I implemented this Sphinx plugin that aims to simplify the process of inserting prefect flow visualizations into a Sphinx project. If you are using both Prefect and Sphinx, feel free to give it a go. Any feedback is more than welcome. There is also an article/demo about this plugin. 😛refect: + Sphinx = ❤️

If you want to orchestrate several flows with Prefect 😛refect:, check out our recent blog post covering the entire ELT lifecycle, from building independent ingestion workflows through data transformations with dbt :dbt: up to triggering downstream flows that use data for reporting and analytics: https://medium.com/the-prefect-blog/orchestrating-elt-with-prefect-and-dbt-a-flow-of-flows-part-1-aac77126473

I struggled a bit getting to terms with Prefect's terminology and how cloud/agents/flows etc integrate, but got some great help from the champions on this forum. Now that things are humming along I decided to write up what I figured out (focused on the infrastructure side of things, rather than writing Flows). Hopefully it's mostly correct and hopefully it's useful for someone! https://rdrn.me/scaling-out-prefect/

We might be a little bit crazy, but we’re doing some business process management using Prefect. Here’s a 20 min presentation about how we integrated Prefect with our Developer Portal at Box (much more talking about the usecase than Prefect itself, but still I think it’s worth sharing 🙂):

Hi everyone, I put together a sphinx plugin to make documenting your tasks much easier - could be interesting to use in conjunction with this too.

Edit: Wrong channel, sorry! This should have gone in #prefect-community. I'm trying to use the stepactivate task to execute an AWS step function, and it's failing on the second flow run, because

execution_name

is not unique. We're trying to set

execution_name

to a uuid4 at run time, but that is probably happing at registration time. How can task arguments be computed dynamically at run time?

For those who couldn't attend the last Airbyte Community Call, here is a tutorial sharing how to integrate Prefect, Airbyte and dbt by @alex 🙂 https://airbyte.io/recipes/elt-pipeline-prefect-airbyte-dbt

Hey everybody - issue #2 of our newsletter (Prefect’s Guide to the Galaxy) just dropped, and you can read it here. Shout out to @Sylvain Hazard for being the featured Slack community post. If you want to sign up you can do so at prefect.io/#newsletter! Happy holiday engineering!

Automatically uploading a flow's Python docs to the flow's README in the cloud UI Here's a Python script I wrote to both register a flow in Prefect and also upload its pdoc3-generated documentation to the flow's README. Usage:

python register.py -p my_project -m module.that.contains.flow.variable

Source of register.py:

from types import ModuleType
from typing import Union

import click
import pdoc
from prefect import Client
from prefect.utilities.graphql import with_args

def docfilter(docobject):
    print(docobject)

@click.command()
@click.option(
    "--project",
    "-p",
    help="The name of the Prefect project to register this flow in. Required.",
    required=True,
)
@click.option(
    "--module",
    "-m",
    help="A python module name containing the flow to register. Required.",
    required=True,
)
def register_flow(project: str, module: Union[ModuleType, str], **kwargs):
    pdoc3_module = pdoc.Module(module=module)
    flow = pdoc3_module.obj.flow 
    flow_id = flow.register(project_name=project, **kwargs)
    client = Client()
    flow_group_id = client.graphql(
        {
            "query": {
                with_args(
                    "flow",
                    {
                        "where": {
                            "id": {
                                "_eq": flow_id,
                            },
                        },
                    }
                ): {
                    "flow_group_id"
                }
            }
        }
    )["data"]["flow"][0]["flow_group_id"]
    docfilter = lambda doc: doc.name in [t.name for t in flow.tasks]
    pdoc3_module = pdoc.Module(module=module, docfilter=docfilter)
    module_markdown = pdoc3_module.text()
    # Do some post-processing to keep Prefect engine from misinterpreting
    # the markdown.
    module_markdown = module_markdown.replace(":   ",":\n").replace("\n:",":").\
                      replace("\n    ","\n")
    ret = client.graphql(
        {
            "mutation": {
                with_args(
                    "set_flow_group_description",
                    {
                        "input": {
                            "flow_group_id": flow_group_id,
                            "description": module_markdown,
                        },
                    }
                ): {
                    "success"
                }
            }
        }
    )
    if not ret["data"]["set_flow_group_description"]["success"]:
        raise RuntimeError("Failed to set flow group README")


if __name__ == "__main__":
    register_flow()

I’ve started a Prefect tutorial to introduce it to my colleagues tomorrow: https://github.com/cdeil/prefect-tutorial It’s only half or less finished, but I thought I’d mention it in case someone is interested or even would like to collaborate on it. Specifically I’d be interested if there’s already a diagram or docs that explain with FlowRunner, TaskRunner etc when

flow.run()

with the default serial executor happens or where the algorithm is that linearises the task graph to decide who runs after who. And also how schedulers work, i.e. if they have at the very core some polling for loop in-process or if the scheduler runs in some other thread or process. For now I’m not planning to look into Dask, just trying to understand how the serial execution works under the hood. Does this information exist in some tutorial form? Or alternatively could you please point me to the few relevant parts in the code or tests to quickly understand how that works?

Hello! The latest Prefect Guide to the Galaxy newsletter is out. You can read it here if you aren’t signed up to receive it via email. And this week’s shoutout goes to @Yusuf Khan, our featured Slack community poster!

Good Morning, I wanted to share a Service we here at Softrams created for Prefect. Our customers and use cases currently require Authorization to secure the runs and access to Prefect. Please check out our open-sourced service! https://github.com/softrams/prefect-auth-proxy

New edition of the Prefect Guide to the Galaxy sent today! Read it here, then sign up to receive the emails! https://prefect.notion.site/Guide-to-the-Galaxy-1-18-2022-9b3de20f40bf49f18ae6976646b29668

Shoutout to @Nash Taylor, our featured community poster!

hey all - wanted to share a lib (though currently still in alpha) I just released called pydapper. It is inspired by the NuGet lib dapper and its intent is to be a simple object mapper that sits on top of the dbapi 2.0 interface. Would love some feedback! https://pydapper.readthedocs.io/en/latest/

I recently created a supplemental blog for productionizing prefect flows with azure and docker. It goes along with a similar one that @Kevin Kho wrote but gets into the details of setting up an azure container registry and a single VM with Prefect Agent and docker. In our scenario, we dont need the overkill and cost of Kubernetes as all of our tasks as just making simple api calls to orchestrate an ELT process. Anyways thought my blog might be of use to others who want to setup a Prefect Agent and deploy code, including dependencies, via Docker in Azure. I had a hard time finding a complete walk-through specific to Azure which is why i wrote this one. https://medium.com/@kquinbar/productionizing-prefect-flows-with-docker-and-azure-47d96542ff9d

Thanks to @Kevin Kho's pro advice, this week I figured out how to deploy a Prefect cloud agent to Google Kubernetes Engine. I wrote it up as a simple tutorial here. I'd love it if some pros gave it a look and offered any pointers.

Our friends at Coiled also released their own Discourse to discuss Dask issues (not limited to Coiled)!

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Here is the GitHub repository for my presentation "Jupyter Notebook to production-ready code" in the Women in Data Science workshop The project includes Prefect, Hydra, and Weights & Biases. It is organized by steps so that you can understand why I use a particular tool. If you want to get a better understanding of the project, you can attend the workshop today for free at 11:30 am PST