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# ask-marvin

Daniel

09/25/2024, 9:29 AM

@Marvin how do I redeploy a prefect flow to prefect cloud by passing the docker --no-cache arg

Marvin

09/25/2024, 9:29 AM

It looks like you want to use the

--no-cache

argument when building a Docker image for deploying a Prefect flow to Prefect Cloud. Here's a guide for both Prefect 2.x and 3.x versions. ### Prefect 2.x In Prefect 2.x, you can use a

prefect.yaml

file to define your flow deployment, including Docker options. Here is an example:

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yaml
# prefect.yaml
name: my-flow
prefect-version: 2.13.4

# Build section to manage and build Docker image
build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build_image
      requires: prefect-docker>=0.3.1
      image_name: my-docker-image:latest
      tag: latest
      dockerfile: auto
      platform: linux/amd64
      docker_options:
        - "--no-cache"

When you run the deployment, Prefect will use the

--no-cache

option during the Docker build process. The command to initiate the deployment might look like this:

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bash
prefect deployment create -n my-flow

References: 1. https://docs-2.prefect.io/latest/integrations/prefect-gcp/gcp-worker-guide/ 2. https://docs-2.prefect.io/latest/guides/docker/ ### Prefect 3.x In Prefect 3.x, you can also use a

prefect.yaml

file. Below is an example illustrating how to include the

--no-cache

argument:

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yaml
# prefect.yaml
name: my-flow

# Build section to manage and build Docker image
build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build_image
      requires: prefect-docker>=0.3.1
      image: my-docker-image:latest
      tag: latest
      dockerfile: ./Dockerfile
      docker_options:
        - "--no-cache"

To deploy the flow, run:

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bash
prefect deploy

References: 1. https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/deploy-via-python 2. https://docs-3.prefect.io/3.0/deploy/infrastructure-concepts/store-flow-code By specifying the

docker_options

with

--no-cache

, you ensure that Docker does not use its build cache during the image creation process.

Daniel

09/25/2024, 9:32 AM

@Marvin I am using prefect 2.19.9. when I use your suggestion like this:

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tag: v2.2
    dockerfile: ./Dockerfile
    platform: linux/amd64
    docker_options:
      - "--no-cache"

I get the following error: TypeError: BuildApiMixin.build() got an unexpected keyword argument ‘docker_options’

Marvin

09/25/2024, 9:32 AM

The error you're seeing,

TypeError: BuildApiMixin.build() got an unexpected keyword argument 'docker_options'

, occurs because the

docker_options

argument is not recognized in the version of Prefect you are using. Instead, you should use

build_kwargs

to pass additional arguments to the Docker build. Here is how you can modify your configuration to include the

--no-cache

option:

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yaml
# prefect.yaml
name: my-flow
prefect-version: 2.19.9

# Build section to manage and build Docker image
build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build_image
      requires: prefect-docker>=0.3.1
      image_name: my-docker-image:latest
      tag: v2.2
      dockerfile: ./Dockerfile
      platform: linux/amd64
      build_kwargs:
        nocache: true

By using

build_kwargs

, you can pass the

nocache: true

parameter to the Docker build command, which effectively disables the cache. To deploy the flow with this configuration, you would run:

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bash
prefect deployment create -n my-flow

This should resolve the error and use the

--no-cache

argument during the Docker build process. References: 1. https://docs-2.prefect.io/latest/integrations/prefect-docker/deployments/steps/

Daniel

09/25/2024, 9:39 AM

@Marvin this gives me a similar error: TypeError: BuildApiMixin.build() got an unexpected keyword argument ‘build_kwargs’

Marvin

09/25/2024, 9:39 AM

It seems that neither

docker_options

nor

build_kwargs

are valid arguments for the

build_docker_image

step in Prefect 2.x. Instead, it appears that you need to use

build_context

to pass build arguments to Docker. Here's how you can pass the

--no-cache

option using the `build_context`:

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yaml
# prefect.yaml
name: my-flow
prefect-version: 2.19.9

# Build section to manage and build Docker image
build:
  - prefect_docker.deployments.steps.build_docker_image:
      id: build_image
      requires: prefect-docker>=0.3.1
      image_name: my-docker-image:latest
      tag: v2.2
      dockerfile: ./Dockerfile
      platform: linux/amd64
      build_context:
        args:
          DOCKER_BUILDKIT: 1
        opts:
          nocache: true

Try updating your

prefect.yaml

file with the

build_context

configurable as shown above, and then run your deployment:

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bash
prefect deployment create -n my-flow

If you still encounter issues, you may need to reference the Prefect documentation directly or consider specifying Docker build processes outside Prefect and simply pointing to the built image. Reference: 1. https://docs-2.prefect.io/latest/integrations/prefect-docker/deployments/steps/

Daniel

09/25/2024, 9:40 AM

@Marvin this also gives a similar error: TypeError: BuildApiMixin.build() got an unexpected keyword argument ‘build_context’ Why is none of this working?

Marvin

09/25/2024, 9:41 AM

It seems we're having trouble navigating the specific configuration options for Prefect 2.x's

build_docker_image

step. Given the errors you've encountered, it's possible that custom build arguments directly within the

build_docker_image

step may not be supported as we've tried so far. After further exploration, another approach would be to handle Docker builds externally and simply reference the resulting image within Prefect. Here's an alternative workflow to achieve your goal: ### Step-by-Step Alternative Workflow: 1. Build your Docker image manually with the
--no-cache
option:

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docker build --no-cache -t my-docker-image:latest -f ./Dockerfile .

2. Push the Docker image to a registry:

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docker tag my-docker-image:latest my-repo/my-docker-image:latest
   docker push my-repo/my-docker-image:latest

3. Reference the pre-built Docker image in your Prefect deployment: Update your

prefect.yaml

to reference the pre-built image:

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yaml
   # prefect.yaml
   name: my-flow
   prefect-version: 2.19.9

   # Deployment configuration to use the pre-built Docker image
   deployments:
     - name: default
       work_pool:
         job_configuration:
           image: my-repo/my-docker-image:latest

4. Create and apply the Prefect deployment:

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bash
   prefect deployment create -n my-flow

By handling the Docker build externally, you have full control over the build process and can include the

--no-cache

option as needed. Prefect will then simply use the specified image for running your flow. If you still have any issues or specific needs, please feel free to ask!

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