Docker Stats Collector

What This Service Does

The Docker Stats Collector is a Go-based service that periodically collects performance statistics from running Docker containers on a host system. It gathers information such as:

• CPU usage
• Memory usage
• Network I/O
• Container image

This data is stored in a SQLite database, allowing for easy querying and analysis of container performance over time. The service is designed to run continuously, providing ongoing monitoring of your Docker environment.

Running the Service on a Server

To run this service on your Ubuntu server:

1. Ensure Docker is installed and running on your server.

2. Copy the compiled docker-stats-collector binary to /usr/local/bin/ on your server.

3. Copy the docker-stats-collector.service file from this repository to /etc/systemd/system/ on your server.

4. Start and enable the service:

   sudo systemctl daemon-reload
   sudo systemctl start docker-stats-collector
   sudo systemctl enable docker-stats-collector

The service will now start automatically on system boot and restart if it crashes.

To check the status of the service:

sudo systemctl status docker-stats-collector

To view logs:

sudo journalctl -u docker-stats-collector

Building the Service

Dependencies

Before building, ensure you have the following installed:

• Go (version 1.17 or later)
• SQLite3 development libraries
• GCC (for CGO compilation)

On Ubuntu, you can install these with:

sudo apt-get update
sudo apt-get install golang sqlite3 libsqlite3-dev gcc

On macOS, if you're cross-compiling for Linux:

brew install go sqlite3 FiloSottile/musl-cross/musl-cross

Build Process

1. Clone this repository:

   git clone https://github.com/yourusername/docker-stats-collector.git
   cd docker-stats-collector

2. Build the binary:

   • On Linux:

     go build -o docker-stats-collector -ldflags="-w -s" .

   • On macOS (cross-compiling for Linux):

     CC=x86_64-linux-musl-gcc CXX=x86_64-linux-musl-g++ GOARCH=amd64 GOOS=linux CGO_ENABLED=1 \
     go build -o docker-stats-collector -ldflags="-w -s" .

   Alternatively, you can use the provided Makefile:

   make build

3. The resulting docker-stats-collector binary can be deployed to your Linux server.

Configuration

The service accepts the following command-line flags:

• -interval: Data collection interval in seconds (default: 5)
• -db: Path to SQLite database file (default: "container_stats.db")
• -log: Path to log file (default: "docker_stats.log")

You can modify these in the docker-stats-collector.service file to adjust the service's behavior.