How deeply does Build Python Web Apps with Streamlit cover Docker volume mount?

Explains host-to-container path syntax and demonstrates Docker and Compose configuration, stopping short of volume lifecycle internals.

Docker volume mount

As explained in Build Python Web Apps with Streamlit

A volume mount is a configuration that makes files or directories from a host or managed volume available inside a container.

A volume mount makes files kept outside a Docker image available inside a running container. This is useful when an app needs configuration or secrets without copying them into the image. section 12.2.5

The -v option uses the form <path-on-host>:<path-on-container>. For example, -v ./.streamlit/:/app/.streamlit maps the host’s .streamlit directory to /app/.streamlit inside the container. section 12.2.5

Mounting Streamlit secrets at runtime

After building the fact-frenzy image, run docker run -p 8502:8501 -v ./.streamlit/:/app/.streamlit fact-frenzy. The port mapping exposes the app locally, while the mount supplies secrets.toml without placing it in the image. section 12.2.5

Deployment changes the source path rather than the mounting idea. In Elastic Beanstalk, docker-compose.yml mounts /var/app/secrets/.streamlit on the server to /app/.streamlit in the container. section 12.3.5

docker run -p 8502:8501 -v ./.streamlit/:/app/.streamlit fact-frenzy

Inspect the complete docker run command that combines port forwarding with the .streamlit volume mount. section 12.2.5

How Build Python Web Apps with Streamlit covers it

Cover of Build Python Web Apps with Streamlit

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Also explained in

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Acing the Certified Kubernetes Administrator Exam, Second EditionA volume mount is a container specification that makes a volume available at a path inside the container's filesystem.

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Related concepts

Docker volumeconfigures · A Docker volume is Docker-managed storage mounted into containers whose data persists independently of their writable layers and lifecycles.
configmapused by · A ConfigMap is a Kubernetes API resource that stores non-confidential configuration data as key-value pairs for use by workloads and other cluster components.
.streamlit directoryconfigures · The .streamlit directory is a project directory containing Streamlit configuration files and related settings.
docker-compose.ymlconfigured by · docker-compose.yml is a declarative YAML configuration file that defines Docker Compose application services and their containers, networks, volumes, and runtime settings.
emptydir volumeuses · An emptyDir volume is a Kubernetes volume that starts empty, is available to containers in a Pod, and is deleted when the Pod leaves its node.
volumeuses · A volume is a logical storage resource that provides capacity for storing and accessing data, often by making it available to an operating system or application.

This explainer was generated by Manning's knowledge graph from the text of Build Python Web Apps with Streamlit. The section links point to the parts of the book it draws on.