📖 LangChain-Streamlit-Docker App Template

🔧 Features

• Basic Skeleton App configured with openai API
• A ChatBot using LangChain and Streamlit
• Docker Support with Optimisation Cache etc
• Deployment on Streamlit Public Cloud
• Deployment on Google Cloud App Engine
• Deployment on Google Cloud using Cloud Run

This repo contains an main.py file which has a template for a chatbot implementation.

Adding your chain

To add your chain, you need to change the load_chain function in main.py. Depending on the type of your chain, you may also need to change the inputs/outputs that occur later on.

💻 Running Locally

1. Clone the repository📂

git clone https://github.com/amjadraza/langchain-streamlit-docker-template.git

2. Install dependencies with uv and activate virtual environment🔨

uv venv
source .venv/bin/activate
uv pip install -r pyproject.toml

3. Run the Streamlit server🚀

streamlit run demo_app/main.py 

Run App using Docker

This project includes Dockerfile to run the app in Docker container. In order to optimise the Docker Image size and building time with cache techniques, I have follow tricks in below Article https://medium.com/@albertazzir/blazing-fast-python-docker-builds-with-poetry-a78a66f5aed0

Build the docker container

docker build . -t langchain-chat-app:latest

To generate Image with DOCKER_BUILDKIT, follow below command

DOCKER_BUILDKIT=1 docker build --target=runtime . -t langchain-chat-app:latest

1. Run the docker container directly

docker run -d --name langchain-chat-app -p 8080:8080 langchain-chat-app

2. Run the docker container using docker-compose (Recommended)

docker-compose up

Deploy App on Streamlit Public Cloud

This app can be deployed on Streamlit Public Cloud using GitHub. Below is the Link to Publicly deployed App

https://langchain-docker-template-amjadraza.streamlit.app/

Deploy App on Google App Engine

This app can be deployed on Google App Engine following below steps.

Prerequisites

Follow below guide on basic Instructions. How to deploy Streamlit apps to Google App Engine

We added below tow configurations files

1. app.yaml: A Configuration file for gcloud
2. .gcloudignore : Configure the file to ignore file / folders to be uploaded

I have adopted Dockerfile to deploy the app on GCP APP Engine.

1. Initialise & Configure the App

gcloud app create --project=[YOUR_PROJECT_ID]

2. Deploy the App using

gcloud app deploy

3. Access the App using

https://langchain-chat.ts.r.appspot.com/

Deploy App on Google Cloud using Cloud Run

This app can be deployed on Google Cloud using Cloud Run following below steps.

Prerequisites

Follow below guide on basic Instructions. How to deploy Streamlit apps to Google App Engine

We added below tow configurations files

1. cloudbuild.yaml: A Configuration file for gcloud
2. .gcloudignore : Configure the file to ignore file / folders to be uploaded

we are going to use Dockerfile to deploy the app using Google Cloud Run.

1. Initialise & Configure the Google Project using Command Prompt

gcloud app create --project=[YOUR_PROJECT_ID]

2. Enable Services for the Project

gcloud services enable cloudbuild.googleapis.com
gcloud services enable run.googleapis.com

3. Create Service Account

gcloud iam service-accounts create langchain-app-cr \
    --display-name="langchain-app-cr"

gcloud projects add-iam-policy-binding langchain-chat \
    --member="serviceAccount:langchain-app-cr@langchain-chat.iam.gserviceaccount.com" \
    --role="roles/run.invoker"

gcloud projects add-iam-policy-binding langchain-chat \
    --member="serviceAccount:langchain-app-cr@langchain-chat.iam.gserviceaccount.com" \
    --role="roles/serviceusage.serviceUsageConsumer"

gcloud projects add-iam-policy-binding langchain-chat \
    --member="serviceAccount:langchain-app-cr@langchain-chat.iam.gserviceaccount.com" \
    --role="roles/run.admin"

4. Generate the Docker

DOCKER_BUILDKIT=1 docker build --target=runtime . -t australia-southeast1-docker.pkg.dev/langchain-chat/app/langchain-chat-app:latest

5. Push Image to Google Artifact's Registry

configure-docker authentication

gcloud auth configure-docker australia-southeast1-docker.pkg.dev

In order to push the docker-image to Artifact registry, first create app in the region of choice.

Check the artifacts locations

gcloud artifacts locations list

Create the repository with name app

gcloud artifacts repositories create app \
    --repository-format=docker \
    --location=australia-southeast1 \
    --description="A Langachain Streamlit App" \
    --async

Once ready, let us push the image to location

docker push australia-southeast1-docker.pkg.dev/langchain-chat/app/langchain-chat-app:latest

6. Deploy using Cloud Run

Once image is pushed to Google Cloud Artifacts Registry. Let us deploy the image.

gcloud run deploy langchain-chat-app --image=australia-southeast1-docker.pkg.dev/langchain-chat/app/langchain-chat-app:latest \
    --region=australia-southeast1 \
    --service-account=langchain-app-cr@langchain-chat.iam.gserviceaccount.com

Report Feedbacks

As langchain-streamlit-docker-template is a template project with minimal example. Report issues if you face any.

DISCLAIMER

This is a template App, when using with openai_api key, you will be charged a nominal fee depending on number of prompts etc.