Support run and destroy

main.go

@@ -3,15 +3,17 @@ package main
 import (
   "bytes"
   "io"
-  "io/ioutil"
+  "net"
   "os"
   "fmt"
   "errors"
   "time"
 
   "golang.org/x/crypto/ssh"
+  "golang.org/x/crypto/ssh/agent"
 
   "github.com/pkg/sftp"
+
   "github.com/scaleway/scaleway-sdk-go/scw"
   "github.com/scaleway/scaleway-sdk-go/api/instance/v1"
 )
@@ -256,7 +258,42 @@ func (dt *destroyer) onInstance(zone, machine, image, name string) error {
 
 type runner struct { action }
 
-func (r *runner) onInstance(zone, machine, image, name string) error {
+func (r *runner) connect(zone, name string) (*ssh.Client, error) {
+  // Connect to the remote
+  z, err := scw.ParseZone(zone)
+  if err != nil {
+    return nil, err
+  }
+
+  targetServer, err := r.getInstanceByName(z, name)
+  if err != nil {
+    return nil, err
+  }
+
+  if targetServer.PublicIP == nil {
+    return nil, errors.New("run failed: this instance has no public ip.")
+  }
+  ip := targetServer.PublicIP.Address
+
+  socket := os.Getenv("SSH_AUTH_SOCK")
+	conn, err := net.Dial("unix", socket)
+	if err != nil {
+    return nil, err
+	}
+
+	agentClient := agent.NewClient(conn)
+	config := &ssh.ClientConfig{
+		User: "root",
+		Auth: []ssh.AuthMethod{
+			ssh.PublicKeysCallback(agentClient.Signers),
+		},
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+	}
+
+  return ssh.Dial("tcp", ip.String()+":22", config)
+}
+
+func (r *runner) send(sshClient *ssh.Client) error {
   // Source script
   if len(os.Args) < 3 {
     return errors.New("Missing script to run on the command line")
@@ -268,47 +305,6 @@ func (r *runner) onInstance(zone, machine, image, name string) error {
   }
   defer src.Close()
 
-  // Connect to the remote
-  z, err := scw.ParseZone(zone)
-  if err != nil {
-    return err
-  }
-
-  targetServer, err := r.getInstanceByName(z, name)
-  if err != nil {
-    return err
-  }
-
-  if targetServer.PublicIP == nil {
-    return errors.New("run failed: this instance has no public ip.")
-  }
-  ip := targetServer.PublicIP.Address
-
-  var hostKey ssh.PublicKey
-  key, err := ioutil.ReadFile(os.Getenv("HOME") + "/.ssh/id_rsa")
-  if err != nil {
-    return err
-  }
-
-	signer, err := ssh.ParsePrivateKey(key)
-	if err != nil {
-    return err
-	}
-
-	config := &ssh.ClientConfig{
-		User: "root",
-		Auth: []ssh.AuthMethod{
-			ssh.PublicKeys(signer),
-		},
-		HostKeyCallback: ssh.FixedHostKey(hostKey),
-	}
-
-  sshClient, err := ssh.Dial("tcp", ip.String()+":22", config)
-	if err != nil {
-    return err
-	}
-	defer sshClient.Close()
-
   // Send our script to the destination
   sftpClient, err := sftp.NewClient(sshClient)
   if err != nil {
@@ -328,10 +324,10 @@ func (r *runner) onInstance(zone, machine, image, name string) error {
   }
 
   _, err = io.Copy(dst, src)
-  if err != nil {
-    return err
-  }
+  return err
+}
 
+func (r *runner) exec(sshClient *ssh.Client) error {
   // Run the script
 	session, err := sshClient.NewSession()
 	if err != nil {
@@ -345,7 +341,7 @@ func (r *runner) onInstance(zone, machine, image, name string) error {
 
   err = session.Run("/tmp/nuage")
   if os.Getenv("VERBOSE") != "" {
-    fmt.Fprintf(os.Stdout, "logs for %v\n", name)
+    fmt.Fprintf(os.Stdout, "logs\n")
     io.Copy(os.Stdout, &sshStdout)
     io.Copy(os.Stderr, &sshStderr)
   }
@@ -356,6 +352,27 @@ func (r *runner) onInstance(zone, machine, image, name string) error {
   return nil
 }
 
+func (r *runner) onInstance(zone, machine, image, name string) error {
+  sshClient, err := r.connect(zone, name)
+  if err != nil {
+    return err
+  }
+	defer sshClient.Close()
+
+  err = r.send(sshClient)
+  if err != nil {
+    return err
+  }
+
+  err = r.exec(sshClient)
+  if err != nil {
+    return err
+  }
+
+  fmt.Fprintf(os.Stdout, "✅ Successfully ran the script on %v (zone %v)\n", name, zone)
+  return nil
+}
+
 
 /**
  * Commands