docker-compose.open-webui-postgres.yml

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# PostgreSQL storage override for Open WebUI.
#
# This file is included automatically by the stack's scripts when
# OPEN_WEBUI_DATABASE=postgres in .env and the open-webui profile is active.
# When OPEN_WEBUI_DATABASE=sqlite (the value existing installations keep), this
# file is not used and Open WebUI keeps its SQLite database in the open-webui
# volume, exactly as before.
#
# Open WebUI does NOT migrate data between backends - switching an existing
# install gives you an empty Open WebUI while the old chats stay in webui.db
# inside the open-webui volume. See docs/open-webui-postgres.md before changing
# OPEN_WEBUI_DATABASE on a running installation.
#
# The 'openwebui' database is created by scripts/databases.sh before any
# service starts. Open WebUI builds its own schema via Alembic on first boot,
# so only the database itself has to pre-exist.
#
# Plain postgresql:// (not postgresql+psycopg://) is intentional: psycopg v3
# only entered requirements.txt in v0.10.0, so a '+psycopg' URL is a hard boot
# failure on any older image - and 'make restart' does not re-pull, so an old
# local image can outlive several updates. Open WebUI normalises plain
# postgresql:// to psycopg v3 for its async engine itself (see _make_async_url
# in backend/open_webui/internal/db.py), so this works on every version.
#
# depends_on is required, not cosmetic: Open WebUI's run_migrations() swallows
# every exception, so an unreachable Postgres at boot produces a running
# container that 500s on every request instead of a loud failure.
#
# Note this moves only the relational data. Uploaded files and the default
# Chroma vector store stay in the open-webui volume in both modes.
services:
  open-webui:
    environment:
      DATABASE_URL: "postgresql://postgres:${POSTGRES_PASSWORD}@postgres:5432/openwebui"
    depends_on:
      postgres:
        condition: service_healthy