Langflow
Build AI workflows and agents visually from connected components.
- One-click install
- Managed HTTPS
- Secrets in panel
- Multi-app VPS
Get Langflow running in minutes
Install Langflow from the VPSnet Applications catalog, claim secrets in the panel, open when HTTPS is ready, and finish initial setup in the app — without SSH as the default path.
Order a server and install
Order Cloud VPS or VDS, or open an existing service. Install Langflow from Applications — safe defaults apply when the recipe allows.
Claim one-time secrets in the panel
Usernames and passwords appear once in the VPSnet panel after install. Copy them when the credentials window opens — they are never emailed.
Open when HTTPS is ready
Most apps use managed HTTPS on a *.vpsnet.cloud host. Wait until the certificate is active, then Open URL from the panel — certificate pending is not an install failure.
Complete initial setup in the app
Sign in with the secrets you claimed (or finish the in-app admin wizard). Complete one real job for Langflow. If you enabled Optional packs at install, finish each pack’s first-run inside the app. Restart, logs, update, and uninstall stay in the Applications panel.
Continue reading the full install guide → — numbered steps, configuration variables, NOTES, and troubleshooting for Langflow.
How to install Langflow on VPSnet
Managed install of Langflow from the Applications panel — credentials in-panel, HTTPS included.
- 01. Choose a plan for LangflowOpen the Langflow product page and note minimum and recommended vCPU, RAM, and disk. Order a new Cloud VPS or VPS, or use a running server that still has free capacity.
- 02. Install from ApplicationsIn the service panel open Applications → Langflow → Install. Choose an access mode and expand Additional settings. If a customer-editable password field is offered, enter your own strong value or leave it empty for VPSnet to generate a random one. Confirm a runtime restart if the panel asks.
- 03. Save one-time credentialsWhen install finishes, the panel shows owner or admin credentials once. Copy them into your password manager immediately — they are never sent by email. If you closed the dialog too early, use the recovery path on that install in Applications.
- 04. Open the managed HTTPS URLWhen Langflow exposes a web UI, VPSnet assigns a *.vpsnet.cloud hostname. A short Certificate pending state is normal while DNS and SSL finish. When the status is active, use Open URL in Applications.
About the application
Langflow provides a visual editor for connecting models, prompts, tools, data sources and APIs into reusable AI flows.
Server requirements
| Requirement | vCPU | RAM | NVMe |
|---|---|---|---|
| Minimum | 2 | 4 GB | 20 GB |
| Recommended | 4 | 8 GB | 40 GB |
Tested compatibility
| Server type | Operating system | Architecture |
|---|---|---|
| VPS | Almalinux 10 | x86_64 |
| VPS and Cloud VPS | Almalinux 9 | x86_64 |
| VPS | Centos stream 10 | x86_64 |
| VPS and Cloud VPS | Centos stream 9 | x86_64 |
| VPS and Cloud VPS | Debian 12 | x86_64 |
| VPS and Cloud VPS | Debian 13 | x86_64 |
| VPS | Rocky 10 | x86_64 |
| VPS and Cloud VPS | Rocky 9 | x86_64 |
| VPS and Cloud VPS | Ubuntu 22.04 | x86_64 |
| VPS and Cloud VPS | Ubuntu 24.04 | x86_64 |
| VPS and Cloud VPS | Ubuntu 26.04 | x86_64 |
| Cloud VPS | Almalinux 8 | x86_64 |
| Cloud VPS | Arch latest | x86_64 |
| Cloud VPS | Oracle 9 | x86_64 |
| Cloud VPS | Rocky 8 | x86_64 |
What you will configure
These are the customer-editable fields for this recipe version. In the install dialog they live under Additional settings (Basics and Optional packs). Access mode is a separate control above that section. Generated passwords and owner accounts appear once as secrets in the panel after install — they are not free-text catalog fields unless listed below.
| Variable | Label | Type | Required | Secret | Default | Meaning |
|---|---|---|---|---|---|---|
LANGFLOW_SUPERUSER | Administrator username | string | Optional | No | admin | — |
LANGFLOW_SUPERUSER_PASSWORD | Administrator password | string | Required Generated if left blank | Secret | — | Generated if left blank |
USE_VPSNET_AI | Use the paid VPSnet AI API | boolean | Optional | No | false | Connect this application to the VPSnet AI API. Model usage is deducted from your account balance at current API rates; no free usage is included. |
OPENAI_API_BASE_URL | AI API address | url | Optional | No | — | Optional OpenAI-compatible HTTPS address. Enter the address, model and API key together, or configure a provider later in the application. |
OPENAI_API_KEY | AI API key | string | Optional | Secret | — | Optional key for your OpenAI-compatible API. It is stored encrypted and is not shown after saving. |
Additional notes
- The install dialog has more than the variables table: Application access (VPSnet HTTPS, Private, Public IP, Managed HTTPS, External HTTPS when offered), Use VPSnet AI plus a model picker when the recipe supports it, Additional settings (Basics and Optional packs), and a runtime restart confirmation on the first managed install.
Frequently asked questions
01How do I install Langflow on a VPSnet server?
Choose Langflow while ordering and it will be installed automatically as soon as the server is ready. On an active server, open Applications, select Langflow and choose Install. You may leave optional settings blank or change them before installation.
02What are the minimum requirements for Langflow?
The catalog lists a minimum of 2 vCPU, 4 GB RAM and 20 GB NVMe for Langflow. Requirements may differ by server type; compare the table above.
03How can I access Langflow after installation?
During installation, you can use an automatically created VPSnet HTTPS address, choose a domain from your VPSnet account and enter its subdomain, provide an existing HTTPS address, open it through the server public IP over HTTP or keep the application private.
04How do I manage Langflow after installation?
In Applications, you can start, stop or restart Langflow, check its health and review recent activity. The same actions are available through the API and MCP.