Distributed Computing with Go

main.go

Let's create a bare minimum Go program so that we can use it in the Docker image. It will take the NAME environmental variable and print <NAME> is your uncle. and then quit:

package main 
 
import ( 
    "fmt" 
    "os" 
) 
 
func main() { 
    fmt.Println(os.Getenv("NAME") + " is your uncle.") 
} 

Now that we have all the code in place, let's build the Docker image using the Dockerfile file:

$ cd docker$ tree.├── Dockerfile└── main.go"0 directories, 2 files $ # -t tag lets us name our docker images so that we can easily refer to them $ docker build . -t hello-uncle Sending build context to Docker daemon 3.072 kB Step 1/5 : FROM golang:1.9.1 ---> 99e596fc807e Step 2/5 : ADD . /go/src/hello ---> Using cache ---> 64d080d7eb39 Step 3/5 : RUN go install hello ...