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Esteban D'Amico
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Add Langgraph Serverless Dokerized RAG using FastAPI
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‎examples/langgraph-sls-fastapi-rag/.dockerignore‎

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node_modules
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.git
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.github
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build
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.devcontainer
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.serverless
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.venv
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.vscode

‎examples/langgraph-sls-fastapi-rag/.env.example‎

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# For local development only
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# OpenAI API key
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OPENAI_API_KEY=
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PINECONE_API_KEY=
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PINECONE_INDEX_NAME=
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TAVILY_API_KEY=
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# LangSmith tracing
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LANGCHAIN_API_KEY=
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LANGCHAIN_TRACING_V2=
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LANGCHAIN_CALLBACKS_BACKGROUND=
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# AWS credentials
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AWS_ACCESS_KEY_ID=
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AWS_SECRET_ACCESS_KEY=

‎examples/langgraph-sls-fastapi-rag/.flake8‎

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[flake8]
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max-line-length = 100
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max-complexity = 18
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select =
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"B", # Bugbear
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"C", # Cyclomatic complexity
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"E", # PEP8 errors
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"F", # PyFlakes
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"W", # PEP8 warnings
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"T4", # Flake8 plugins that check typing
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"B9", # Bugbear
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#require-plugins =
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# "flake8-bugbear",
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# "flake8-black",

‎examples/langgraph-sls-fastapi-rag/.gitignore‎

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##### IDE's #####
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# VisualStudioCode
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/.vscode/
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.vscode/*
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!.vscode/settings.json
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!.vscode/tasks.json
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!.vscode/launch.json
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!.vscode/extensions.json
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*.code-workspace
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.history
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# IntelliJ IDEA
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.idea/*
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##### Database #####
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*.accdb
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*.db
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*.dbf
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*.mdb
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*.pdb
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*.sqlite3
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##### Logs #####
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*.log
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*.log*
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##### Python #####
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# Byte-compiled / optimized / DLL files
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__pycache__/
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*.py[cod]
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*$py.class
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# Distribution / packaging
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.Python
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build/
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develop-eggs/
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dist/
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downloads/
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eggs/
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.eggs/
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lib/
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lib64
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lib64/
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parts/
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sdist/
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var/
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wheels/
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pip-wheel-metadata/
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share/python-wheels/
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*.egg-info/
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.installed.cfg
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*.egg
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MANIFEST
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bin/
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# Environments
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Makefile
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.env
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.env.*
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.env.local
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!.env.example
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.venv
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env/
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venv/
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ENV/
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env.bak/
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venv.bak/
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.flaskenv
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pyvenv.cfg
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# PyInstaller
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*.manifest
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*.spec
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# Installer logs
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pip-log.txt
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pip-delete-this-directory.txt
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# Unit test / coverage reports
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htmlcov/
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.tox/
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.nox/
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.coverage
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.coverage.*
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.cache
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nosetests.xml
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coverage.xml
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*.cover
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*.py,cover
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.hypothesis/
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.pytest_cache/
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# Flask stuff:
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instance/
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.webassets-cache
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# Translations
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*.mo
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*.pot
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# Sphinx documentation
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docs/_build/
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# PyBuilder
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target/
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# IPython
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profile_default/
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ipython_config.py
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# PEP 582
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__pypackages__/
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# mkdocs documentation
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/site
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# mypy
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.mypy_cache/
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.dmypy.json
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dmypy.json
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# ruff
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.ruff_cache/
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# Pyre type checker
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.pyre/
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# pytype static type analyzer
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.pytype/
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# C extensions
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*.so
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##### Heroku (old) #####
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Procfile
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# Serverless
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node_modules/
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.serverless/
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# wsgi
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wsgi_handler.py
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serverless_wsgi.py
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.serverless-wsgi
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#OSx
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.DS_Store
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run.Ps1
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# LangGraph
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.langgraph_api
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‎examples/langgraph-sls-fastapi-rag/.markdownlint.json‎

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{
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"MD041": false,
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"MD042": false,
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"MD004": false,
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"MD013": false,
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"MD033": false,
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"MD024": false
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}

‎examples/langgraph-sls-fastapi-rag/.node-version‎

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22.14.0

‎examples/langgraph-sls-fastapi-rag/.pre-commit-config.yaml‎

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---
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# See https://pre-commit.com for more information
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# See https://pre-commit.com/hooks.html for more hooks
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repos:
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- repo: https://github.com/pycqa/flake8
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rev: 6.0.0
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hooks:
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- id: flake8
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additional_dependencies: [flake8-black, flake8-bugbear]
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args: [--config, .flake8]
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- repo: https://github.com/astral-sh/ruff-pre-commit
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rev: v0.5.1
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hooks:
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- id: ruff
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args: [--fix]
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- repo: https://github.com/pycqa/isort
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rev: 5.12.0
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hooks:
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- id: isort
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args: [--profile, black]
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- repo: local
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hooks:
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- id: pytest
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name: pytest
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entry: pytest
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language: system
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pass_filenames: false
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always_run: true

‎examples/langgraph-sls-fastapi-rag/.shellcheckrc‎

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disable=SC1090 # Non-constant source
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disable=SC1091 # Not specified as input
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disable=SC2034 # Unused variables (they are used but in other scripts)
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disable=SC2154 # Referenced, but not assigned
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disable=SC1071 # Unknown shell

‎examples/langgraph-sls-fastapi-rag/.yaml-lint.yml‎

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---
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extends: default
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ignore: |
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**/pnpm-lock.yaml
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rules:
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line-length:
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max: 100
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ignore: |
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**/workflows/lint.yml
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**/serverless.yml
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**/sls/envs/*.yml
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braces:
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max-spaces-inside: -1 # Disable spaces inside braces enforcement
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min-spaces-inside: -1 # Disable spaces inside braces enforcement
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truthy:
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ignore: |
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**/workflows/*.yml

‎examples/langgraph-sls-fastapi-rag/Dockerfile‎

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# Stage 1: Build development dependencies
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FROM python:3.12.0 AS builder-dev
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WORKDIR /code
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# Install system dependencies for psycopg2 and pipenv
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RUN apt-get update \
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&& apt-get install --no-install-recommends -y \
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libpq-dev \
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gcc=4:12.2.0-3 \
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&& pip install --no-cache-dir --upgrade pip==24.1.2 \
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&& pip install --no-cache-dir pipenv==2024.0.1
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# Copy Pipfiles
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COPY Pipfile Pipfile.lock ./
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# Install development dependencies
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RUN pipenv install --dev --system --deploy
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# Stage 2: Build production dependencies
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FROM python:3.12.0-alpine AS builder-prod
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WORKDIR /code
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# Install system dependencies for psycopg2 and pipenv
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RUN apk update \
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&& apk add --no-cache \
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postgresql15-dev=15.7-r0 \
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gcc=12.2.1_git20220924-r10 \
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musl-dev=1.2.4-r2 \
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&& pip install --no-cache-dir --upgrade pip==24.1.4 \
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&& pip install --no-cache-dir pipenv==2024.0.1
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# Copy Pipfiles
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COPY Pipfile Pipfile.lock ./
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# Install production dependencies
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RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --deploy --system
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# Stage 3: Final image
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FROM python:3.12.0-alpine as production
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WORKDIR /code
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# Install runtime dependencies for psycopg2
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RUN apk update \
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&& apk add libpq=15.7-r0
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# Copy production dependencies from builder-prod stage
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COPY --from=builder-prod /usr/local /usr/local
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# Copy the application code
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COPY ./app ./app
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# Create a non-root user to run the application
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RUN adduser -D -H nonroot
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# Switch to the non-root user
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USER nonroot
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# Command to run the application
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CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80"]
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# Stage 4: Lambda function
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FROM public.ecr.aws/lambda/python:3.12 as lambda
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WORKDIR ${LAMBDA_TASK_ROOT}
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# Install system dependencies for psycopg2 and pipenv
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RUN dnf install -y \
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postgresql-devel \
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gcc-11.4.1-2.amzn2023.0.2.x86_64 \
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&& pip install --no-cache-dir --upgrade pip==24.1.2 \
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&& pip install --no-cache-dir pipenv==2024.0.1 \
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&& dnf clean all
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# Copy Pipfiles
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COPY Pipfile Pipfile.lock ${LAMBDA_TASK_ROOT}/
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# Install production dependencies
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RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --system --deploy
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# Copy the lambda handler code
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COPY . ${LAMBDA_TASK_ROOT}
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CMD ["app/main.handler"]

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