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<@ULVA73B9P> when pulling the code from source on ...
# marvin-in-the-wild
p
@Marvin when pulling the code from source on deployment, do the credentials propagate to pulling git submodules?
m
When deploying code from a source on Prefect, including submodules, it's crucial to understand how credentials are handled. Credentials must be explicitly provided for each repository and submodule you plan to clone. Prefect supports this through various methods like using a GitHub, GitLab, or Bitbucket token, or a 
Secret
block. You can directly include credentials in your deployment configuration. Here's an example of configuring a 
pull
step in your prefect.yaml to use credentials securely:
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yaml
pull:
  - prefect.deployments.steps.git_clone:
      repository: <https://bitbucket.org/org/repo.git>
      access_token: "{{ prefect.blocks.secret.bitbucket-token }}"
In this scenario, credentials specified for the main repository do not automatically propagate to submodules. You must ensure that each submodule's repository has the necessary access tokens configured. For more detailed guidance, check out the Prefect documentation on deployments and storage guide.
In both Prefect 2.x and 3.x, you can use credentials for pulling code from repositories, which includes handling submodules. For Prefect 2.x, you can provide credentials either through blocks like 
GitHubCredentials
, 
GitLabCredentials
, or 
BitbucketCredentials
, or directly using an access token. You can use a Secret block to securely store and use these credentials. Example for Prefect 2.x:
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pull:
  - prefect.deployments.steps.git_clone:
      repository: <https://bitbucket.org/org/repo.git>
      access_token: "{{ prefect.blocks.secret.bitbucket-token }}"
For Prefect 3.x, the process is similar. It allows the use of credentials blocks or direct tokens to clone repositories, handling submodules with the provided credentials. Example for Prefect 3.x:
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pull:
  - prefect.deployments.steps.git_clone:
      repository: <https://github.com/org/repo.git>
      credentials: "{{ prefect.blocks.github-credentials.my-credentials }}"
For more information, refer to the following documentation: Prefect 2.x: - https://docs-2.prefect.io/latest/guides/prefect-deploy/ - https://docs-2.prefect.io/latest/guides/deployment/storage-guide/ Prefect 3.x: - https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/prefect-yaml
p
@Marvin so if I have a repo, with multiple submodules, do I have to specify multiple git_clone steps?
m
In Prefect (both 2.x and 3.x), you do not need to specify multiple 
git_clone
steps if your repository has submodules. You can handle submodules within a single 
git_clone
step by including the necessary submodule initialization and updates. Example for Prefect 2.x and 3.x:
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pull:
  - prefect.deployments.steps.run_shell_script:
      script: |
        git clone --recurse-submodules <https://github.com/org/repo.git>
        cd repo
        git submodule update --init --recursive
      stream_output: true
Using the 
run_shell_script
step allows you to execute shell commands that clone the repository while initializing and updating its submodules in one go. For more information on deployment steps and handling repositories with submodules, refer to the following documentation: Prefect 2.x: - https://docs-2.prefect.io/latest/guides/ci-cd/ - https://docs-2.prefect.io/latest/integrations/prefect-github/repository/ Prefect 3.x: - https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/prefect-yaml - https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/deploy-ci-cd
p
@Marvin give me a complete yaml as an example
m
Sure, here's a complete 
prefect.yaml
example for both Prefect 2.x and 3.x that demonstrates how to pull a repository with submodules:
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yaml
# prefect.yaml

name: my-deployment
description: An example deployment

# Specify the pull step
pull:
  - prefect.deployments.steps.run_shell_script:
      id: clone-repo
      script: |
        git clone --recurse-submodules <https://github.com/org/repo.git>
        cd repo
        git submodule update --init --recursive
      stream_output: true

# Set the working directory
  - prefect.deployments.steps.set_working_directory:
      id: set-working-dir
      directory: repo

# Define the flow run configuration
flow:
  name: my-flow
  entrypoint: repo/my_flow.py:flow

# Add any additional steps needed (build, push, etc.)
build:
  - prefect.deployments.steps.run_shell_script:
      id: install-dependencies
      script: |
        pip install -r repo/requirements.txt
      stream_output: true

# Define the schedule (if any)
schedule:
  interval: "@daily"  # Run daily
This example deployment performs the following steps: 1. Clone the repository: The 
git clone --recurse-submodules
command clones the repository along with all its submodules. 2. Initialize and update submodules: The 
git submodule update --init --recursive
command makes sure that all submodules are initialized and updated. 3. Set the working directory: This step sets the working directory to the cloned repository. 4. Specify the flow entrypoint: Define the entrypoint for your flow within the repository. 5. Install dependencies: An additional step to install any required dependencies using a 
requirements.txt
file. 6. Define the schedule: You can set up a schedule for your flow runs. In this example, it runs daily. You can adjust the script and paths according to your specific repository structure and requirements. For more detailed explanations and examples, you can refer to: - Prefect 2.x documentation: https://docs-2.prefect.io/latest/guides/prefect-deploy/ - Prefect 3.x documentation: https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/prefect-yaml
p
@Marvin I want to deploy from gitlab CI, how can I provide the current branch name as deployment name?
m
To deploy from GitLab CI and use the current branch name as the deployment name, you can use GitLab CI environment variables. Here’s how you can do it: ### GitLab CI YAML Example Here’s a complete 
.gitlab-ci.yml
configuration:
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yaml
image: python:3.8

stages:
  - deploy

deploy:
  stage: deploy
  script:
    - pip install prefect
    - BRANCH_NAME=$(echo $CI_COMMIT_REF_NAME | sed 's/\//-/g')  # Replace '/' with '-' in branch names
    - prefect deployment build -n "my-flow-$BRANCH_NAME" -p default-agent-pool --apply --skip-upload
  only:
    - branches  # Adjust this according to your needs (e.g., only: [main, develop])
### Prefect Deployment YAML Example This is a simple example `prefect.yaml`:
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yaml
# prefect.yaml

name: my-deployment
description: An example deployment

# Specify the pull step
pull:
  - prefect.deployments.steps.run_shell_script:
      script: |
        git clone --recurse-submodules <https://your-repo.git>
        cd repo
        git submodule update --init --recursive
      stream_output: true

# Set the working directory
  - prefect.deployments.steps.set_working_directory:
      directory: repo

# Define the flow run configuration
flow:
  name: my-flow
  entrypoint: repo/my_flow.py:flow

# Add any additional steps needed (build, push, etc.)
build:
  - prefect.deployments.steps.run_shell_script:
      script: |
        pip install -r repo/requirements.txt
      stream_output: true

# Define the schedule (if any)
schedule:
  interval: "@daily"  # Run daily
### Explanation: 1. GitLab CI Configuration (
.gitlab-ci.yml
): - Image: Use a Python image to run your Prefect code. - Stages: Define the stages of your CI/CD pipeline. - Script: - Install Prefect. - Extract the branch name using 
$CI_COMMIT_REF_NAME
, and replace any slashes (
/
) with hyphens (
-
). - Build the Prefect deployment with a name that includes the branch name. - Adjust the 
only
condition to specify which branches you want to run this on. 2. Prefect Configuration (
prefect.yaml
): - Define the steps to pull, set the working directory, and configure the flow. This example handles cloning the repository along with its submodules, sets up the working directory, installs dependencies, and schedules flow execution. This setup ensures that each deployment name will include the branch name from which it was deployed, providing better organization and tracking in Prefect. For additional details, see: - Prefect 2.x CI/CD guide: https://docs-2.prefect.io/latest/guides/ci-cd/ - Prefect 3.x CI/CD guide: https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/deploy-ci-cd
p
@Marvin I created and filled in a prefect.yaml file. Why do I get prompted for various stuff (like name, schedule, etc.) when calling prefect deploy? I expected prefect deploy to pull the details from the yaml file.
m
When deploying using the 
prefect deploy
command, you may get prompted for various details if those details are not specified or missing in your 
prefect.yaml
file. The 
prefect.yaml
file should contain detailed configuration to avoid such prompts, but let me provide some clarity on how to ensure this. ### Prefect 3.x Configuration 1. Ensure all required fields are present in 
prefect.yaml
: Your 
prefect.yaml
file should include all necessary fields like name, schedule, and deployment configurations. 2. Check your 
prefect.yaml
syntax:
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yaml
    # prefect.yaml

    name: my-flow-deployment
    description: An example deployment

    # Specify the pull step
    pull:
      - prefect.deployments.steps.run_shell_script:
          script: |
            git clone --recurse-submodules <https://your-repo.git>
            cd repo
            git submodule update --init --recursive
          stream_output: true

    # Set the working directory
      - prefect.deployments.steps.set_working_directory:
          directory: repo

    # Define the flow run configuration
    flow:
      name: my-flow
      entrypoint: repo/my_flow.py:flow

    # Add any additional steps needed (build, push, etc.)
    build:
      - prefect.deployments.steps.run_shell_script:
          script: |
            pip install -r repo/requirements.txt
          stream_output: true

    # Define the schedule (if any)
    schedule:
      interval: "@daily"  # Run daily
3. Use the 
--skip-prompt
flag: When deploying, you can use the 
--skip-prompt
flag to avoid interactive prompts if the necessary information is already included in the 
prefect.yaml
. Example command:
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sh
    prefect deploy --skip-prompt
### Common Reasons for Prompts: - Missing Fields: If essential fields like 
name
, 
schedule
, or 
flow entrypoint
are missing from the 
prefect.yaml
, Prefect will prompt for this information. - Syntax Errors: Any syntactical issues in your 
prefect.yaml
might lead to prompts or errors. Ensure the indentation and structure are correct. - Incorrect Field Names: Ensure that you use the correct field names as specified in the Prefect documentation. ### Documentation References: - Prefect 3.x deployment guide: https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/prefect-yaml - GitLab integration: https://docs-3.prefect.io/integrations/prefect-gitlab Ensure your 
prefect.yaml
file covers all necessary configurations, and use the 
--skip-prompt
flag for a smoother deployment experience.
p
@Marvin there is no --skip-prompt option
m
It appears that Prefect automatically prompts for details during deployment even if a 
prefect.yaml
file is present. These prompts occur when certain necessary details are missing or not specified in the 
prefect.yaml
. ### How to Avoid Prompts To avoid interactive prompts, make sure all required fields are filled in the 
prefect.yaml
file. Here are the key sections you should ensure are completed: 1. Deployment Name and Description: - `name`: The name of the deployment. - `description`: A brief description of what the deployment does. 2. Flow Configuration: - `flow`: The flow settings, including the flow's entry point. 3. Schedules (if any): - `schedule`: Define the schedule for when the flow should run (e.g., using 
cron
or 
interval
). 4. Pull Instructions: - `pull`: Steps to clone the repository and any submodules. ### Example of a Complete 
prefect.yaml
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yaml
name: my-deployment
description: An example deployment

# Specify the pull step
pull:
  - prefect.deployments.steps.run_shell_script:
      id: clone-repo
      script: |
        git clone --recurse-submodules <https://your-repo.git>
        cd repo
        git submodule update --init --recursive
      stream_output: true

# Set the working directory
  - prefect.deployments.steps.set_working_directory:
      id: set-working-dir
      directory: repo

# Define the flow run configuration
flow:
  name: my-flow
  entrypoint: repo/my_flow.py:flow

# Add any additional steps needed (build, push, etc.)
build:
  - prefect.deployments.steps.run_shell_script:
      id: install-dependencies
      script: |
        pip install -r repo/requirements.txt
      stream_output: true

# Define the schedule (if any)
schedule:
  interval: "@daily"  # Run daily
### Command to Deploy without Prompts While there's no explicit 
--skip-prompt
flag, ensuring all required configurations are in the 
prefect.yaml
should prevent interactive prompts. Use the following command:
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sh
prefect deploy
### Documentation References: For detailed explanations, visit: - Prefect deployment guide (2.x) - Prefect deployment guide (3.x) By ensuring that the 
prefect.yaml
is fully and correctly configured, you can reduce or eliminate the interactive prompts during deployment. If you encounter persistent prompts, it could be due to missing or incorrect configurations in the 
prefect.yaml
.
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