How to do data persistence?

[t-release]

May I ask a question: I am running on a Docker container and have configured user login authentication? However, why is it that after deleting and restarting my container, all the previously created users and process data are gone? How should I persist the data? Including users, logs, project data created by users, etc

[ismaildasci]

the problem is that docker containers are ephemeral by default. when you delete and recreate container, all data inside is lost.

you need to use docker volumes to persist data. langflow stores data in sqlite by default.

here is how to set it up:

# docker-compose.yml
services:
  langflow:
    image: langflowai/langflow:latest
    ports:
      - "7860:7860"
    volumes:
      - langflow_data:/app/langflow
    environment:
      - LANGFLOW_DATABASE_URL=sqlite:////app/langflow/langflow.db
      - LANGFLOW_CONFIG_DIR=/app/langflow

volumes:
  langflow_data:

the key points:

1. langflow_data:/app/langflow - this creates a named volume that persists even when container is deleted

2. set LANGFLOW_DATABASE_URL to point to file inside the volume

3. set LANGFLOW_CONFIG_DIR for config persistence

if you prefer to use host directory instead of docker volume:

volumes:
  - ./langflow_data:/app/langflow

this mounts local folder, easier to backup.

for production, consider using postgres instead of sqlite:

environment:
  - LANGFLOW_DATABASE_URL=postgresql://user:pass@db:5432/langflow

services:
  db:
    image: postgres:15
    volumes:
      - postgres_data:/var/lib/postgresql/data

after setting up volumes, your users, flows, and logs will persist across container restarts and recreations.