Prerequisites

Ensure that Docker is installed and running in your development environment. Familiarity with Docker commands and a basic understanding of Docker networking is assumed.

Docker Setup for go-events

Step 1: Clone the Repository

Clone the go-events repository to your local environment. Use the following command:

git clone https://github.com/yourusername/go-events.git
cd go-events

Step 2: Create a Dockerfile

In the root of the cloned repository, create a file named Dockerfile. This file will define how the Docker container for the development environment will be built.

# Start from the Go base image
FROM golang:1.16 AS builder

# Set the current working directory inside the container
WORKDIR /app

# Copy the necessary files for building the application
COPY go.mod go.sum ./
RUN go mod download

COPY . .

# Build the Go application
RUN go build -o go-events .

# Use a lightweight image for running the app
FROM alpine:latest

WORKDIR /app

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

# Command to run the application
CMD ["./go-events"]

Step 3: Create a .dockerignore file

This file will help in excluding unnecessary files from being copied into the Docker image. Create a file named .dockerignore in the root directory and add the following content:

# Ignore the Go build artifacts
go-events
*.test
*.exe

Step 4: Building the Docker Image

Navigate to the root of the go-events directory and build the Docker image using the following command:

docker build -t go-events:dev .

Step 5: Running the Docker Container

To run the Docker container for the development environment, execute the following command. This will map the local port to the container’s port.

docker run -p 8080:8080 go-events:dev

The application should now be accessible at http://localhost:8080.

Step 6: Setting Up Environment Variables (Optional)

If your application requires environment variables, you can pass them while running the Docker container. Use the --env flag for each variable:

docker run -p 8080:8080 --env MY_ENV_VAR=value go-events:dev

Step 7: Using Docker Compose (Optional)

For a more complex development setup that requires multiple services, consider using Docker Compose. Create a docker-compose.yml file in the root directory:

version: '3.8'

services:
  go-events:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "8080:8080"
    environment:
      MY_ENV_VAR: value

To build and run your application using Docker Compose, execute the following command:

docker-compose up --build

This command will build the Docker image and start your service in the background.

Step 8: Verifying the Setup

After starting the Docker container, verify that the application is running correctly. Use tools like curl or navigate to http://localhost:8080 in a web browser to check the response.

curl http://localhost:8080

Conclusion

This configuration allows for a flexible and effective development environment for the go-events project using Docker. The above steps can be tailored depending on specific development requirements.

Source of information: go-events Documentation