Lightweight Langfuse Deployment

I've been experimenting with Langfuse, Open Source LLM Engineering Platform, and I think it's a very good solution that let's you have logging and management locally, with a very small footprint. It's really simple to deploy locally, https://langfuse.com/docs/deployment/local .

I wanted to add another way, for those that are looking to possibly do group collaboration that could lead to some financial incentive(this part i'm still figuring out). Here's a simple outline of how to deploy this on AWS, which will cost about $32-33/month.

## Creating RDS instance

Navigate to the RDS service in the AWS console

Create Database

- Change the Engine to PostgreSQL

- Select `Free tier` from the Templates section

- Change `Master username` and `Master Password` to something acceptable to your organization

- Change `Storage type` under `Storage` to `General Purpose SSD(gp3)` make sure the allocated storage is 20 GiB

- Under `Connectivity` change `Public access` to `Yes`

- Under `Connectivity` change `VPC security group (firewall)` to `Create new` then give it a name

- Scroll down and click `Create database`

Now, we want to create our EC2 instance.

- Assuming you know how to create an EC2 instance. The noteworthy setup here is using Ubuntu 22.04 on a free tier instance.

- Create a new Security group, take note of the name, we're going to use it in the next step.

- Note the public IP, this is going to be used to setup your langfuse instance.

Next we modify the security group for the RDS instance

- Navigate to RDS in the console

- Select your DB from the Databases menu in RDS

- With the `Connectivity & security` tab selected, click the link under `VPC security groups`, this should be the name you created for your security group in the previous steps.

- Click the link under the column `Security group ID`

- Click `Edit inbound rules`

- Click `Add rule` select `PostgreSQL` from the `Type` dropdown. Select `Custom` from the Source dropdown. Click the box next to the source dropdown, type in the name of the security group you used for your EC2 instance.

- Click `Save rules`

Now you can install Docker and Langfuse on your EC2 instance

## Installing Docker new EC2 - Ubuntu 22.04

```bash

sudo snap install docker

docker pull ghcr.io/langfuse/langfuse:2

docker run --name langfuse \

-e DATABASE_URL='postgresql://postgres_username:postgress_password!@aws_rds_endpoint:5432/postgres' \

-e NEXTAUTH_URL=http://localhost:3000 \

-e NEXTAUTH_SECRET=some_secret_you_create \

-e SALT=some_salt_you_create \

-p 3000:3000 \