Docker/Go

Dockerfile

# Configures a Go web server and copies the current folder content
# to use as server root.

# Use the following commands to build and run the server.
#   docker build -t go-server .
#   docker run -d -p 8000:8000 --name=go-server go-server

# Then open a web browser and connect to http://localhost:8000 .

# References:
#   https://blog.logrocket.com/creating-a-web-server-with-golang/
#   https://stackoverflow.com

FROM golang:alpine
WORKDIR /usr/src/app

COPY . .
RUN go build app.go

EXPOSE 8000
CMD ["./app"]

app.go

// Displays "Hello world!"
//
// References:
//  https://repl.it/@mauriycf/A-simple-web-server-in-go#main.go
//  https://gowebexamples.com/hello-world/

package main

import (
    "net/http"
    "io"
)

func handler(response http.ResponseWriter, request *http.Request) {
    io.WriteString(response, "Hello world!")
}

func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8000", nil)
}

Try It

Online Free

1. Use Play with Docker. Create an account and/or log in.
2. Start an interactive session and add a new instance.
3. In the terminal window, enter the following commands:
   • touch Dockerfile
   • touch app.go
4. Use the Editor button to edit both files and save the contents above into each respective file.
5. Run the following commands:
   • docker build -t go-server .
   • docker run -d -p 8000:8000 --name=go-server go-server
6. In the top window, select the 8000 button to connect to the running server.

On Your Own System

1. Install Docker Desktop or the Docker Engine.
2. Save the files above into a new Docker Go folder:
   • Dockerfile
   • app.go
3. At a command prompt, change to the Docker Go folder and then run the following commands:
   • docker build -t go-server .
   • docker run -d -p 8000:8000 --name=go-server go-server
4. Open a web browser to connect to the running server:
   • http://localhost:8000.

See Also

• Server-Side Scripting
• Docker: The best way to learn Docker for Free: Play-With-Docker (PWD)

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