logpaste

A minimalist web service for uploading and sharing log files.

Features

• Accept text uploads from command-line, JavaScript, and web UI
• Simple to deploy
  • Runs in a single Docker container
  • Fits in the free tier of Heroku
• Easy database management
  • Syncs persistent data to any S3-compatible cloud storage provider
• Customizable UI without changing source code

Demo

• http://logpaste.com

Run LogPaste

From source

PORT=3001 go run cmd/logpaste/main.go

From Docker

To run LogPaste within a Docker container, mount a volume from your local system to store the LogPaste sqlite database.

docker run \
  -e "PORT=3001" \
  -p 3001:3001/tcp \
  --volume "${PWD}/data:/app/data" \
  --name logpaste \
  mtlynch/logpaste

From Docker + cloud data replication

If you specify settings for an S3 bucket, LogPaste will use Litestream to automatically replicate your data to S3.

You can kill the container and start it later, and it will restore your data from the S3 bucket and continue as if there was no interruption.

LITESTREAM_ACCESS_KEY_ID=YOUR-ACCESS-ID
LITESTREAM_SECRET_ACCESS_KEY=YOUR-SECRET-ACCESS-KEY
LITESTREAM_REGION=YOUR-REGION
DB_REPLICA_URL=s3://your-bucket-name/db

docker run \
  -e "PORT=3001" \
  -e "LITESTREAM_ACCESS_KEY_ID=${LITESTREAM_ACCESS_KEY_ID}" \
  -e "LITESTREAM_SECRET_ACCESS_KEY=${LITESTREAM_SECRET_ACCESS_KEY}" \
  -e "LITESTREAM_REGION=${LITESTREAM_REGION}" \
  -e "DB_REPLICA_URL=${DB_REPLICA_URL}" \
  -p 3001:3001/tcp \
  --name logpaste \
  mtlynch/logpaste

Some notes:

• Only run one Docker container for each S3 location
  • LogPaste can't sync writes across multiple instances.

With custom site settings

LogPaste offers some options to customize the text for your site. Here's an example that uses a custom title, subtitle, and footer:

SITE_TITLE="My Cool Log Pasting Service"
SITE_SUBTITLE="Upload all your logs for FooBar here"
SITE_FOOTER="<h2>Notice</h2><p>Only cool users can share logs here.</p>"
SITE_DARK_MODE="true"
SITE_SHOW_DOCUMENTATION="false" # Hide usage information from homepage
PER_MINUTE_LIMIT="5" # Allow only 5 pastes per minute per IP

docker run \
  -e "PORT=3001" \
  -e "SITE_TITLE=${SITE_TITLE}" \
  -e "SITE_SUBTITLE=${SITE_SUBTITLE}" \
  -e "SITE_FOOTER=${SITE_FOOTER}" \
  -e "SITE_DARK_MODE=${SITE_DARK_MODE}" \
  -e "SITE_SHOW_DOCUMENTATION=${SITE_SHOW_DOCUMENTATION}" \
  -e "PER_MINUTE_LIMIT=${PER_MINUTE_LIMIT}" \
  -p 3001:3001/tcp \
  --name logpaste \
  mtlynch/logpaste

Parameters

Command-line flags

Docker environment variables

You can adjust behavior of the Docker container by passing these parameters with docker run -e:

Docker build args

If you rebuild the Docker image from source, you can adjust the build behavior with docker build --build-arg:

Deployment

LogPaste is easy to deploy to cloud services. Here are some places it works well:

• fly.io (recommended)
• Heroku
• Google Cloud Run
• Amazon LightSail

Further reading

• "How Litestream Eliminated My Database Server for $0.03/month": Explains the motivation behind LogPaste