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<@ULVA73B9P> how can I use WorkPoolUpdate for modi...
# ask-marvin
g
@Marvin how can I use WorkPoolUpdate for modify the default base job template
m
To modify the default base job template for a work pool using 
WorkPoolUpdate
, you can use the 
prefect work-pool update
command. Here are the steps and some details to guide you: 1. Create a JSON file with the new base job template: - This file should define both the 
job_configuration
and 
variables
sections. - Ensure that all variables used in the 
job_configuration
section are declared within the 
variables
section using double curly braces for placeholders (e.g., 
{{ variables.image_pull_policy }}
). 2. Use the update command in the CLI: - Execute the following command in your CI/CD pipeline or command line:
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sh
    prefect work-pool update --base-job-template path/to/your/base-job-template.json my-work-pool
### Example of JSON Template Here’s an example template:
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json
{
  "variables": { 
    "image_pull_policy": "Never", 
    "auto_remove": true 
  },
  "job_configuration": {
    "image_pull_policy": "{{ variables.image_pull_policy }}",
    "auto_remove": "{{ variables.auto_remove }}"
  }
}
### Relevant Links: 1. Prefect Documentation: Work Pools 2. GitHub Issue Example: Better documentation for work pool 'base-job-template' This process allows version control of your job templates and ensures that any updates are consistently applied across your work pools.
g
@Marvin how can I use this python import to update?
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from prefect.client.schemas.actions import WorkPoolUpdate
m
To update a work pool's base job template using the 
WorkPoolUpdate
class in Python, you can follow these steps: 1. Import the necessary module:
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python
   from prefect.client.schemas.actions import WorkPoolUpdate
2. Create an instance of 
WorkPoolUpdate
with the new base job template:
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python
   # Define your new base job template
   base_job_template = {
       "variables": { 
           "image_pull_policy": "Never", 
           "auto_remove": True 
       },
       "job_configuration": {
           "image_pull_policy": "{{ variables.image_pull_policy }}",
           "auto_remove": "{{ variables.auto_remove }}"
       }
   }

   # Create an instance of WorkPoolUpdate
   work_pool_update = WorkPoolUpdate(base_job_template=base_job_template)
3. Update the work pool using the Prefect client:
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python
   from prefect.client import get_client
   import asyncio

   async def update_work_pool():
       async with get_client() as client:
           # Update the work pool with the new base job template
           await client.update_work_pool(work_pool_name="my-work-pool", work_pool_update=work_pool_update)

   # Run the coroutine to perform the update
   asyncio.run(update_work_pool())
### Documentation Reference You can also refer to the Work Pools Prefect documentation for additional context. This example demonstrates how to use the 
WorkPoolUpdate
class along with the Prefect client to programmatically update the base job template for a specified work pool.
g
@Marvin how can I store json as a secret
m
To store a JSON string as a secret in Prefect, you can use Secret blocks. Here are steps to store and retrieve a secret: ### Step-by-Step Guide 1. Store the JSON as a Secret using the CLI: - Save your JSON to a file, e.g., 
secret.json
. - Use the following Prefect CLI command to store this JSON as a secret:
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sh
    prefect block register -n MySecretName -c secret.json
2. Store the JSON via Python code: - Use the Prefect library to save the JSON directly from your Python script.
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python
    from prefect.blocks.system import Secret

    # Define your JSON
    my_json = {
        "variables": { 
            "image_pull_policy": "Never", 
            "auto_remove": True 
        },
        "job_configuration": {
            "image_pull_policy": "{{ variables.image_pull_policy }}",
            "auto_remove": "{{ variables.auto_remove }}"
        }
    }

    # Create a Secret block
    secret_block = Secret(value=my_json)

    # Save the Secret block to the Prefect storage with a given name
    secret_block.save(name="my-json-secret")
3. Retrieve and use the JSON Secret in a Flow: - When you need to retrieve and use the stored JSON secret, you can do so in your Prefect flow or task.
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python
    from prefect import flow, task
    from prefect.blocks.system import Secret

    @task
    def get_secret():
        # Load the secret
        secret_block = Secret.load("my-json-secret")
        return secret_block.value

    @flow
    def main_flow():
        # Retrieve the secret
        json_secret = get_secret()
        print(json_secret)
        
    if __name__ == "__main__":
        main_flow()
### Documentation Reference For more details, you can refer to the Prefect secrets documentation. These steps will help you securely store and retrieve JSON secrets using Prefect blocks, enhancing the security of your credentials and configuration data.
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