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main.go
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main.go
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package main
import (
"bufio"
"encoding/json"
"fmt"
"os"
"github.com/docker/machine/drivers/virtualbox"
"github.com/docker/machine/libmachine"
"github.com/docker/machine/libmachine/log"
)
func usage() {
fmt.Println("Usage: go run main.go <example>\n" +
"Available examples: create streaming.")
os.Exit(1)
}
// Sample Virtualbox create independent of Machine CLI.
func create() {
log.SetDebug(true)
client := libmachine.NewClient("/tmp/automatic", "/tmp/automatic/certs")
defer client.Close()
hostName := "myfunhost"
// Set some options on the provider...
driver := virtualbox.NewDriver(hostName, "/tmp/automatic")
driver.CPU = 2
driver.Memory = 2048
data, err := json.Marshal(driver)
if err != nil {
log.Error(err)
return
}
h, err := client.NewHost("virtualbox", data)
if err != nil {
log.Error(err)
return
}
h.HostOptions.EngineOptions.StorageDriver = "overlay"
if err := client.Create(h); err != nil {
log.Error(err)
return
}
out, err := h.RunSSHCommand("df -h")
if err != nil {
log.Error(err)
return
}
fmt.Printf("Results of your disk space query:\n%s\n", out)
fmt.Println("Powering down machine now...")
if err := h.Stop(); err != nil {
log.Error(err)
return
}
}
// Streaming the output of an SSH session in virtualbox.
func streaming() {
log.SetDebug(true)
client := libmachine.NewClient("/tmp/automatic", "/tmp/automatic/certs")
defer client.Close()
hostName := "myfunhost"
// Set some options on the provider...
driver := virtualbox.NewDriver(hostName, "/tmp/automatic")
data, err := json.Marshal(driver)
if err != nil {
log.Error(err)
return
}
h, err := client.NewHost("virtualbox", data)
if err != nil {
log.Error(err)
return
}
if err := client.Create(h); err != nil {
log.Error(err)
return
}
h.HostOptions.EngineOptions.StorageDriver = "overlay"
sshClient, err := h.CreateSSHClient()
if err != nil {
log.Error(err)
return
}
stdout, stderr, err := sshClient.Start("yes | head -n 10000")
if err != nil {
log.Error(err)
return
}
defer func() {
_ = stdout.Close()
_ = stderr.Close()
}()
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
fmt.Println(scanner.Text())
}
if err := scanner.Err(); err != nil {
log.Error(err)
}
if err := sshClient.Wait(); err != nil {
log.Error(err)
}
fmt.Println("Powering down machine now...")
if err := h.Stop(); err != nil {
log.Error(err)
return
}
}
func main() {
if len(os.Args) != 2 {
usage()
}
switch os.Args[1] {
case "create":
create()
case "streaming":
streaming()
default:
usage()
}
}