DB Conn

A Go utility to test database connection strings in parallel, with configurable driver and input file.

Features

• Reads a list of database connection strings from a file, one per line (see targets.example.txt).
• Connects to each database in parallel using the specified driver
• Reports success/failure for each connection and overall success rate

Usage

make run ARGS="[flags]"

Example Usage

make run ARGS="-f my_targets.txt -d mysql -t 2s"

Supported Drivers (-d flag)

• postgres (default)
• mysql
• sqlite3

AWS Lambda Deployment

You can deploy this utility as an AWS Lambda function. Follow these steps:

1. Create a targets.txt file

Create a file called targets.txt at the project root, and list your connection strings on it (one per line).

2. Build the Lambda Binary

Build a Linux executable named bootstrap (required name for Lambda custom runtime):

make build_lambda

This will:

• Build the binary for Linux (GOOS=linux)
• Output it as bootstrap
• Zip it as db-conn.zip

3. Upload to AWS Lambda

1. Go to the AWS Lambda console.
2. Create a new Lambda function (see image below).
3. Upload the db-conn.zip file as the function code.