Creating a Docker image for a Go TCP/IP server

In this section, you will learn how to put kvTCP.go into a Docker image and use it from there, which is a pretty convenient way of using a TCP/IP application because a Docker image can be easily transferred to other machines or deployed in Kubernetes.

As you might expect, everything will begin with a Dockerfile, which will have the following contents:

FROM golang:latest 
 
RUN mkdir /files 
COPY kvTCP.go /files 
WORKDIR /files 
 
RUN go build -o /files/kvTCP kvTCP.go 
ENTRYPOINT ["/files/kvTCP","80"] 

After that, you will need to build the Docker image, as follows:

$ docker build -t kvtcp:latest .
Sending build context to Docker daemon  6.656kB
Step 1/6 : FROM golang:latest
 ---> 7ced090ee82e
Step 2/6 : RUN mkdir /files
 ---> Running in bbbbada6271f
Removing intermediate container bbbbada6271f
 ---> 5b0a621eee29...