To build and start the github.com/docker/go-metrics project, follow the steps outlined below.

Prerequisites

Ensure that you have the following installed on your machine:

• Go environment (version 1.12 or higher is recommended)
• Docker (to run metrics in a container)

Make sure your Go environment is set up correctly by running the following command:

go version

Step 1: Clone the Repository

Begin by cloning the GitHub repository containing the go-metrics source code. Open your terminal and execute:

git clone https://github.com/docker/go-metrics.git

Navigate into the cloned directory:

cd go-metrics

Step 2: Build the Project

Since the project uses Go modules, ensure you’re not using the -mod=vendor flag during the build process. To build the project, run:

go build

This command compiles the code and produces an executable suitable for your platform. Verify that the executable has been created by listing the contents of the directory:

ls -l

You should see an executable file (e.g., on Unix-like systems, it might not have an extension).

Step 3: Running the Metrics Application

To start the application, simply run the generated executable from the command line. Use the following command:

./go-metrics

Step 4: Docker Setup (Optional)

If you choose to run the application within a Docker container, you can create a Dockerfile in the project root with the following content:

FROM golang:1.16 AS builder

WORKDIR /app

COPY . .

RUN go build -o go-metrics .

FROM alpine:latest

COPY --from=builder /app/go-metrics .

ENTRYPOINT ["./go-metrics"]

To build the Docker image, run:

docker build -t go-metrics .

After the image is built, you can start a container with:

docker run --rm go-metrics

Conclusion

By following these steps, you should be able to build and run the github.com/docker/go-metrics project, both locally and within a Docker container.

Source: github.com/docker/go-metrics