满足条件：
能够访问互联网，并且能够下载镜像。
Use Docker Compose to build Langflow with a persistent PostgreSQL database service:
获取 Langflow 仓库（repository）:
git clone https://github.com/langflow-ai/langflow.git
导航到 the docker_example 目录:
cd langflow/docker_example
运行 the Docker Compose 文件:
docker compose up
备注：
后台运行:docker compose up -d
访问 Langflow
root@rocky95 docker_example# docker compose up
+ Running 5/5
✔ Network docker_example_default Created 0.3s
✔ Volume "docker_example_langflow-postgres" Created 0.0s
✔ Volume "docker_example_langflow-data" Created 0.0s
✔ Container docker_example-postgres-1 Created 0.3s
✔ Container docker_example-langflow-1 Created 0.3s
Attaching to langflow-1, postgres-1
postgres-1 | The files belonging to this database system will be owned by user "postgres".
postgres-1 | This user must also own the server process.
postgres-1 |
postgres-1 | The database cluster will be initialized with locale "en_US.utf8".
postgres-1 | The default database encoding has accordingly been set to "UTF8".
postgres-1 | The default text search configuration will be set to "english".
postgres-1 |
postgres-1 | Data page checksums are disabled.
postgres-1 |
postgres-1 | fixing permissions on existing directory /var/lib/postgresql/data ... ok
postgres-1 | creating subdirectories ... ok
postgres-1 | selecting dynamic shared memory implementation ... posix
postgres-1 | selecting default max_connections ... 100
postgres-1 | selecting default shared_buffers ... 128MB
postgres-1 | selecting default time zone ... Etc/UTC
postgres-1 | creating configuration files ... ok
postgres-1 | running bootstrap script ... ok
postgres-1 | performing post-bootstrap initialization ... ok
postgres-1 | syncing data to disk ... ok
postgres-1 |
postgres-1 | initdb: warning: enabling "trust" authentication for local connections
postgres-1 | initdb: hint: You can change this by editing pg_hba.conf or using the option -A, or --auth-local and --auth-host, the next time you run initdb.
postgres-1 |
postgres-1 | Success. You can now start the database server using:
postgres-1 |
postgres-1 | pg_ctl -D /var/lib/postgresql/data -l logfile start
postgres-1 |
postgres-1 | waiting for server to start....2025-07-28 10:44:31.573 UTC 48 LOG: starting PostgreSQL 16.9 (Debian 16.9-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
postgres-1 | 2025-07-28 10:44:31.591 UTC 48 LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
postgres-1 | 2025-07-28 10:44:31.659 UTC 51 LOG: database system was shut down at 2025-07-28 10:44:29 UTC
postgres-1 | 2025-07-28 10:44:31.697 UTC 48 LOG: database system is ready to accept connections
postgres-1 | done
postgres-1 | server started
postgres-1 | CREATE DATABASE
postgres-1 |
postgres-1 |
postgres-1 | /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*
postgres-1 |
postgres-1 | 2025-07-28 10:44:32.139 UTC 48 LOG: received fast shutdown request
postgres-1 | waiting for server to shut down...2025-07-28 10:44:32.217 UTC 48 LOG: aborting any active transactions
postgres-1 | .2025-07-28 10:44:32.220 UTC 48 LOG: background worker "logical replication launcher" (PID 54) exited with exit code 1
postgres-1 | 2025-07-28 10:44:32.224 UTC 49 LOG: shutting down
postgres-1 | 2025-07-28 10:44:32.255 UTC 49 LOG: checkpoint starting: shutdown immediate
postgres-1 | 2025-07-28 10:44:32.761 UTC 49 LOG: checkpoint complete: wrote 922 buffers (5.6%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.087 s, sync=0.345 s, total=0.537 s; sync files=301, longest=0.278 s, average=0.002 s; distance=4255 kB, estimate=4255 kB; lsn=0/1912108, redo lsn=0/1912108
postgres-1 | 2025-07-28 10:44:32.769 UTC 48 LOG: database system is shut down
postgres-1 | done
postgres-1 | server stopped
postgres-1 |
postgres-1 | PostgreSQL init process complete; ready for start up.
postgres-1 |
postgres-1 | 2025-07-28 10:44:32.937 UTC 1 LOG: starting PostgreSQL 16.9 (Debian 16.9-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
postgres-1 | 2025-07-28 10:44:32.938 UTC 1 LOG: listening on IPv4 address "0.0.0.0", port 5432
postgres-1 | 2025-07-28 10:44:32.938 UTC 1 LOG: listening on IPv6 address "::", port 5432
postgres-1 | 2025-07-28 10:44:33.031 UTC 1 LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
postgres-1 | 2025-07-28 10:44:33.098 UTC 64 LOG: database system was shut down at 2025-07-28 10:44:32 UTC
postgres-1 | 2025-07-28 10:44:33.131 UTC 1 LOG: database system is ready to accept connections
✓ Initializing Langflow...
✓ Checking Environment...
✓ Starting Core Services...
✓ Connecting Database...
✓ Loading Components...
✓ Adding Starter Projects...
postgres-1 | 2025-07-28 10:44:47.820 UTC 68 ERROR: relation "alembic_version" does not exist at character 15
postgres-1 | 2025-07-28 10:44:47.820 UTC 68 STATEMENT: SELECT * FROM alembic_version
▣ Launching Langflow...07/28/25 10:44:47 INFO 2025-07-28 10:44:47 - INFO - service.py:309
langflow-1 | service - Initializing alembic
✓ Launching Langflow...
langflow-1 |
langflow-1 | ╭─────────────────────────────────────────────────────────────────────────╮
langflow-1 | │ │
langflow-1 | │ Welcome to Langflow │
langflow-1 | │ │
langflow-1 | │ 🌟 GitHub: Star for updates → https://github.com/langflow-ai/langflow │
langflow-1 | │ 💬 Discord: Join for support → https://discord.com/invite/EqksyE2EX9 │
langflow-1 | │ │
langflow-1 | │ We collect anonymous usage data to improve Langflow. │
langflow-1 | │ To opt out, set: DO_NOT_TRACK=true in your environment. │
langflow-1 | │ │
langflow-1 | │ 🟢 Open Langflow → http://localhost:7860 │
langflow-1 | │ │
langflow-1 | ╰─────────────────────────────────────────────────────────────────────────╯
postgres-1 | 2025-07-28 10:49:33.187 UTC 62 LOG: checkpoint starting: time
postgres-1 | 2025-07-28 10:50:08.184 UTC 62 LOG: checkpoint complete: wrote 349 buffers (2.1%); 0 WAL file(s) added, 0 removed, 0 recycled; write=34.707 s, sync=0.127 s, total=34.997 s; sync files=188, longest=0.102 s, average=0.001 s; distance=2159 kB, estimate=2159 kB; lsn=0/1B2DE20, redo lsn=0/1B2DDE8
langflow-1 | 07/28/25 11:22:01 WARNING 2025-07-28 11:22:01 - WARNING - local local.py:60
langflow-1 | - File 046-rocket.svg not found in flow
langflow-1 | app/langflow/profile_pictures/Space.
langflow-1 | WARNING 2025-07-28 11:22:01 - WARNING - local local.py:60
langflow-1 | - File 046-rocket.svg not found in flow
langflow-1 | app/langflow/profile_pictures/Space.
postgres-1 | 2025-07-28 11:24:33.773 UTC 62 LOG: checkpoint starting: time
postgres-1 | 2025-07-28 11:24:34.111 UTC 62 LOG: checkpoint complete: wrote 2 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.102 s, sync=0.034 s, total=0.339 s; sync files=2, longest=0.034 s, average=0.017 s; distance=1 kB, estimate=1943 kB; lsn=0/1B2E260, redo lsn=0/1B2E228
langflow-1 | 07/28/25 12:39:40 WARNING 2025-07-28 12:39:40 - WARNING - local local.py:60
langflow-1 | - File 046-rocket.svg not found in flow
langflow-1 | app/langflow/profile_pictures/Space.
langflow-1 | WARNING 2025-07-28 12:39:40 - WARNING - local local.py:60
langflow-1 | - File 046-rocket.svg not found in flow
langflow-1 | app/langflow/profile_pictures/Space.
Gracefully stopping... (press Ctrl+C again to force)
+ Stopping 2/2
✔ Container docker_example-langflow-1 Stopped 3.5s
✔ Container docker_example-postgres-1 Stopped 0.7s
root@rocky95 docker_example#