< Marvin> I have a deployment with variables on a schedule C Prefect Community #ask-marvin

<@ULVA73B9P> I have a deployment with variables on...

Kaleb King

07/15/2024, 7:32 PM

@Marvin I have a deployment with variables on a schedule. Can I use that same deployment, but pass it different variables and run it on a different schedule? Or do I need to create a separate deployment?

Marvin

07/15/2024, 7:32 PM

You can declare multiple deployments for different schedules and variables within the same project. This allows for reusing the same deployment logic but with different configurations and schedules. Here's a brief guide based on the relevant documents and issues: 1. Multiple Schedules in
prefect.yaml
: You can define multiple schedules for your deployments in your

prefect.yaml

file. Each deployment can have its own schedule and activation status. Example:

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deployments:
     - name: first-deployment
       schedule:
         - cron: "0 0 * * *"
           timezone: "America/Chicago"
           active: true
     - name: second-deployment
       schedule:
         - cron: "0 12 * * *"
           timezone: "America/New_York"
           active: true

Source - Prefect 2. Overriding Job Variables: You can override job variables for each specific deployment by adding a

job_variables

section to your deployment definition. Example:

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deployments:
     - name: first-deployment
       entrypoint: flow.py
       work_pool:
         name: local
       job_variables:
         env:
           VAR_1: value1
           VAR_2: value2

Source - Prefect 3. Declaring Multiple Deployments: Prefect supports declaring multiple deployments in the same

deployment.yaml

file, which lets you declare custom schedules, job variables, and deployment behaviors independently. Example:

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deployments:
     - name: first-deployment
       flow_name: count-flow
       work_pool:
         name: local

     - name: second-deployment
       flow_name: another-flow
       work_pool:
         name: local
       schedule:
         - cron: "0 12 * * *"
           timezone: "America/New_York"

You can deploy all these together or separately: - Update all deployments:

prefect deploy --all

- Update specific deployment:

prefect deploy -n first-deployment

GitHub PR - Expand Projects to Support Multiple Deployments To sum up, you don't need separate deployment projects. You can create multiple deployments within the same project, specifying different schedules and job variables using the

prefect.yaml

file.

Kaleb King

07/15/2024, 7:40 PM

@Marvin Can I use the same

entrypoint

for two or more deployments?

Marvin

07/15/2024, 7:41 PM

Yes, you can use the same

entrypoint

for multiple deployments. Each deployment can share the same flow code but have different configurations such as schedules, work pools, and job variables. To elaborate: 1. Using the Same Entrypoint: The

entrypoint

of a deployment refers to a function decorated as a flow within a Python file. Different deployments can reference the same entrypoint but vary in other configurations. Example:

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deployments:
     - name: deployment-1
       entrypoint: path/to/flow.py:flow_function
       schedule: 
         - cron: "0 0 * * *"
           timezone: "America/Chicago"
     - name: deployment-2
       entrypoint: path/to/flow.py:flow_function
       schedule:
         - cron: "0 12 * * *"
           timezone: "America/New_York"

2. Reusing Configuration: Prefect allows the reuse of configuration across deployments using YAML anchors and aliases. This can help maintain consistency and reduce duplication in deployment files. Example with YAML aliases:

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common_settings: &common
     entrypoint: path/to/flow.py:flow_function
     work_pool:
       name: local

   deployments:
     - name: deployment-1
       <<: *common
       schedule: 
         - cron: "0 0 * * *"
           timezone: "America/Chicago"
     - name: deployment-2
       <<: *common
       schedule:
         - cron: "0 12 * * *"
           timezone: "America/New_York"

For more detailed documentation, you can refer to the links provided: - Prefect Schedules - Deployments Guide This approach ensures that your deployments can share the same codebase while being triggered at different times or under different configurations.

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