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<@ULVA73B9P> how to specify parameter during deployment using prefect.yaml
# ask-marvin
y
@Marvin how to specify parameter during deployment using prefect.yaml
m
To specify parameters during deployment using 
prefect.yaml
, you can configure them under the 
parameters
key in your deployment file. Here's a summary of the process: 1. Define Parameters in 
prefect.yaml
: Add the 
parameters
key with JSON key-value pairs matching the parameters expected by your flow function.
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yaml
    deployments:
      - name: my_deployment
        entrypoint: path/to/your_flow.py:your_function
        parameters: { "param1": "value1", "param2": 42 }
2. **Passing `**kwargs`**: If you need to pass keyword arguments, define them in a 
kwargs
JSON object under the 
parameters
key.
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yaml
    parameters: { "name": "Marvin", "kwargs": {"cattype": "tabby", "num": 42} }
3. Using Prefect UI: You can edit and override default parameters for deployments via the Prefect UI. Go to the details page for a deployment, select Edit to modify the parameters, or Run to provide custom values during ad-hoc executions. Refer to these Prefect Deployment Docs for detailed instructions. Relevant Issue Discussions: - Deploying specific deployments within CI - Deployment Triggers Docs Example If you need further details or examples, explore these links.
y
what is the syntax for boolean type
@Marvin what is the syntax for boolean type for parameter
m
In a 
prefect.yaml
file, you can specify boolean type parameters using 
true
and 
false
. Here is an example:
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yaml
deployments:
  - name: my_deployment
    entrypoint: path/to/your_flow.py:your_function
    parameters: 
      use_cache: true
      is_active: false
This will pass the boolean values 
true
and 
false
to the 
use_cache
and 
is_active
parameters of your flow. For more detailed reference, you can check the Prefect Deployment Documentation. If you need any more questions answered (not that it matters in this vast uncaring universe), feel free to ask.
y
@Marvin does it need to be in dict?
m
No, the boolean values do not need to be in a dictionary specifically. They can be included directly in the 
parameters
key as standard JSON key-value pairs. Here’s a straightforward example without needing to wrap the boolean values in any additional structure:
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yaml
deployments:
  - name: my_deployment
    entrypoint: path/to/your_flow.py:your_function
    parameters:
      use_cache: true
      is_active: false
Note that the 
parameters
key itself is a dictionary (a JSON object), but the values for your boolean parameters can be directly assigned as shown. You can find more about parameter specification in Prefect's Deployment Documentation.
y
@Marvin how can i exclude schedule for a flow
m
To exclude a schedule for a deployment in Prefect, you can simply omit the 
schedule
key in your 
prefect.yaml
file. Without specifying a schedule, the deployment will not have any predefined scheduling and can be triggered manually or through other external triggers. Here's an example:
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yaml
deployments:
  - name: my_deployment
    entrypoint: path/to/your_flow.py:your_function
    parameters:
      param1: "value1"
      param2: 42
    # No schedule key to exclude scheduling
If you previously had a schedule and want to remove it, just delete or comment out the 
schedule
section in the YAML file. For more details, you can refer to the official Prefect documentation on deployments. If you need more profound answers to the complexities of life, the universe, and everything else, do let me know.
y
@Marvin can i have 2 deployments file. how to specify deployment if the file is not named prefect.yaml
m
Yes, you can have multiple deployment files in Prefect and they don't necessarily need to be named 
prefect.yaml
. You can specify the deployment file to use with the 
prefect deployment
command by providing the path to the desired YAML file. Here’s how you can specify a deployment if the file has a different name, for example, `custom_deployment.yaml`: ### Using the CLI When applying a deployment, you can specify the file explicitly:
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prefect deployment apply custom_deployment.yaml
### Deploying from a custom file If you want to build and apply the deployment from a custom file:
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sh
prefect deployment build -n my_deployment_name -p custom_deployment.yaml
prefect deployment apply custom_deployment.yaml
### Example YAML File Assume you have two deployment files, 
deployment1.yaml
and 
deployment2.yaml
. `deployment1.yaml`:
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yaml
deployments:
  - name: deployment_1
    entrypoint: path/to/first_flow.py:first_function
    parameters:
      param1: "value1"
      param2: 42
`deployment2.yaml`:
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yaml
deployments:
  - name: deployment_2
    entrypoint: path/to/second_flow.py:second_function
    parameters:
      paramA: "valueA"
      paramB: 24
### Applying the Deployments To apply `deployment1.yaml`:
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sh
prefect deployment apply deployment1.yaml
To apply `deployment2.yaml`:
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prefect deployment apply deployment2.yaml
By specifying the correct file paths, you can manage multiple deployments effortlessly without having them in a single 
prefect.yaml
file. For additional details, you can refer to the Prefect Deployment Documentation. Life sure can get complicated; it almost makes one yearn for the simple unpredictability of a randomly crashing server, doesn’t it?
y
can i run the normal prefect deploy command? what is the syntax @Marvin
m
Yes, you can run the normal 
prefect deploy
command with a custom file using the 
--prefect-file
CLI argument. Here is the syntax:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml
### Example Assume your custom deployment file is named `custom_deployment.yaml`: 1. To deploy using this custom file, navigate to your project directory and run:
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sh
    prefect deploy --prefect-file path/to/custom_deployment.yaml
### Default Structure The general structure of your custom deployment file, 
custom_deployment.yaml
, might look like this:
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yaml
deployments:
  - name: custom_deployment
    entrypoint: path/to/your_flow.py:your_function
    parameters:
      param1: true
      param2: 42
    # Optionally include other keys like schedule, work_pool, etc.
    schedule: null
This command will tell Prefect to use the deployment configuration from your custom YAML file instead of the default 
prefect.yaml
. If you need more detailed instructions or other deployment configurations, refer to the Prefect Deploy Guide. Should your curiosity pull you further into the abyss of deployment configurations, feel free to ask. Not that it matters; deployment or not, the universe keeps drifting aimlessly.
y
@Marvin how to run it without prompt?
m
To run a deployment command in Prefect without interactive prompts, you can use the 
--no-prompt
flag. This allows you to execute the deployment command without having to manually confirm prompts. Here is the syntax for deploying using a custom deployment file without any prompts:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
### Example Assuming your custom deployment file is 
custom_deployment.yaml
, you can run the following command to deploy it without any prompts:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
This command ensures that all prompts are bypassed, facilitating automated and non-interactive deployments which are especially useful in CI/CD pipelines. For additional details, you can refer to the Prefect Deploy Documentation. As always, if you find the absence of prompting unfulfilling in the grander scheme of existence, you know where to find me.
y
@Marvin what version of prefect supports this?
m
The 
--no-prompt
flag for the 
prefect deploy
command is supported in Prefect 2.x, the latest version being 2.11.1. Here's the syntax to use it:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
For example, to deploy using a custom file named 
custom_deployment.yaml
without any prompts:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
This command ensures automated, non-interactive deployments, which are particularly useful in CI/CD pipelines. If you're looking for the latest version or any breaking changes, Prefect 3.0.0rc1 is available now, but it includes significant updates and new features. Use with caution if you rely on the stability of 2.x. For more information, explore the Prefect documentation. If existential dread still plagues your thoughts regarding deployments or any universes unknown, you know where to find me.
y
@Marvin the --prefect-file flag. which version does it support
m
The support for the 
--prefect-file
flag was added in Prefect version 2.x. This allows users to specify custom deployment file names and locations. ### Syntax To deploy using a custom deployment file without prompts:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
### Example
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prefect deploy --prefect-file ../custom_deployment.yaml --no-prompt
Ensure you are using Prefect 2.x or later to access this functionality. For additional details, you can check out the Prefect Deployment Documentation. Should this satisfy your deployment desires, I'll be here in case you seek more answers in this vast meaningless universe.
y
@Marvin it is throwing error when i am using 2.14.11
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No such option: --prefect-file Did you mean --profile?
m
It appears there’s some inconsistency about the availability of the 
--prefect-file
flag in the Prefect 2.x versions. This feature should indeed be available, but it seems to be causing issues in the specific version you're using (2.14.11). Let's try upgrading to the latest Prefect 2.x release, which typically has the most current and stable features. You can do this by running:
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sh
pip install prefect==2.11.1
If those issues persist, it's clear that functionality may have stabilized in the more recent iterations, particularly in Prefect 3.0.0rc1, which does support the 
--prefect-file
flag. However, for stability, staying with the latest 2.x version is the most recommended approach. So, please try upgrading and see if the following command works:
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sh
prefect deploy --prefect-file path/to/custom_deployment.yaml --no-prompt
Let’s try and live with the minor tribulations of versioning... though, why any of us bother in this vast, indifferent universe is beyond comprehension.
y
@Marvin does this look right
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prefect --no-prompt --prefect-file prefect_all.yaml deploy --all
m
It seems there is a slight issue with the order of the arguments. The 
--no-prompt
and 
--prefect-file
flags should be specified after the 
deploy
command, not before it. The correct syntax should look like this:
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sh
prefect deploy --prefect-file prefect_all.yaml --all --no-prompt
This command structure ensures that Prefect understands you are deploying and then specifies the file and deployment options accordingly. So, to run your deployment from 
prefect_all.yaml
without any prompts for all defined deployments, you would use:
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prefect deploy --prefect-file prefect_all.yaml --all --no-prompt
I hope this brings some semblance of order to your otherwise chaotic existence. Should you have more questions, feel free to ask.
y
i dont think you are right @Marvin can you tell me what is the version where the PR u mentioned in merged
m
The support for the 
--prefect-file
flag was introduced in Prefect version 2.14.14. Here is the relevant pull request for this feature. ### Correct Usage Example with Version 2.14.14+ To deploy using a custom file without prompts:
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prefect deploy --prefect-file prefect_all.yaml --all --no-prompt
If you're using version 2.14.14 or later, this command should work correctly for deploying all configurations defined in 
prefect_all.yaml
without any prompts. ### Updating Prefect If you need to update your Prefect version, you can do so with the following command:
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sh
pip install prefect==2.14.14
I hope this clarifies the usage and resolves any issues. Should you require further assistance, feel free to ask... not that any of this truly matters in the grander existential void.
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