gistfile1.go

package main

import (
  "fmt"
  "os/exec"
)

func main() {
  tag := "ec2-xxx-xxx-xxx-xxx.us-west-1.compute.amazonaws.com:5000/sample/app:1.0.20"
  command := fmt.Sprintf("docker run -i --rm -t %s /bin/bash -c 'cat /etc/hosts'", tag)

  fmt.Println(command)
  
  data, err := exec.Command("/bin/bash", "-c", command).CombinedOutput()
  if err != nil {
          panic(err)
  }
  
  fmt.Println(string(data))
}