droplet create makes the network and disks

doDroplet.go

@@ -7,11 +7,15 @@ package main
 
 import (
 	"fmt"
+	"math/rand"
 	"net/http"
 	"net/url"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
+	"go.wit.com/lib/gui/shell"
 	"go.wit.com/lib/protobuf/virtpb"
 	"go.wit.com/log"
 )
@@ -132,13 +136,13 @@ func doEvent(e *virtpb.Event) *virtpb.Event {
 		}
 		result.DropletName = e.Droplet.Hostname
 		result.Error = e.Droplet.FormatTEXT() // feedback to the other side for debugging
-		if e.Droplet != nil {
+
+		// attempt to create the new droplet
 		if err := createDroplet(e.Droplet, result); err != nil {
 			result.Error += fmt.Sprintf("createDroplet() err: %v", err)
 			result.State = virtpb.Event_FAIL
 			return result
 		}
-		}
 		log.Println("create droplet worked", e.Droplet.FormatTEXT())
 		result.State = virtpb.Event_DONE
 		return result
@@ -224,23 +228,134 @@ func createDroplet(newd *virtpb.Droplet, result *virtpb.Event) error {
 		return fmt.Errorf("hostname already defined")
 	}
 
+	// by default, on locally imported domains, set the preferred hypervisor!
 	newd.LocalOnly = "yes on: " + "farm03"
 
-	// by default, on locally imported domains, set the preferred hypervisor!
 	newd.PreferredHypervisor = "farm03"
+	newd.StartState = virtpb.DropletState_OFF
 
 	newd.Current = new(virtpb.Current)
-	newd.Current.Hypervisor = "farm03"
-	newd.StartState = virtpb.DropletState_OFF
 	newd.Current.State = virtpb.DropletState_OFF
 
-	me.cluster.AddDroplet(newd)
+	// create the network
+	if err := createNetwork(newd); err != nil {
+		return err
+	}
 
+	// create the disks
+	if err := createDisks(newd); err != nil {
+		return err
+	}
+
+	// append the protobuf and save it
+	me.cluster.AddDroplet(newd)
 	if err := me.cluster.ConfigSave(); err != nil {
 		log.Info("configsave error", err)
 		return fmt.Errorf("ConfigSave() error: %v", err)
 	}
 
-	result.State = virtpb.Event_DONE
 	return nil
 }
+
+func findDisks(d *virtpb.Droplet) error {
+	log.Info("need to do this")
+	return nil
+}
+
+func createDisks(d *virtpb.Droplet) error {
+	if d.Disks != nil {
+		return findDisks(d)
+	}
+
+	newdisk := new(virtpb.Disk)
+	newdisk.Filename = d.Hostname + ".qcow2"
+	newdisk.Filepath = "/home/nfs2"
+	d.Disks = append(d.Disks, newdisk)
+
+	basefile := "/home/nfs2/base2025.wit-5.qcow2"
+	newfile := filepath.Join(newdisk.Filepath, newdisk.Filename)
+
+	if !shell.Exists(newdisk.Filepath) {
+		return fmt.Errorf("disk image path missing: %s", newdisk.Filepath)
+	}
+
+	if !shell.Exists(basefile) {
+		return fmt.Errorf("basefile %s missing", basefile)
+	}
+
+	if shell.Exists(newfile) {
+		return fmt.Errorf("disk image already exists: %s", newfile)
+	}
+
+	cmd := []string{"dd", "bs=100M", "status=progress", "oflag=dsync", "if=" + basefile, "of=" + newfile}
+	result := shell.RunRealtime(cmd)
+	if result.Exit != 0 {
+		return fmt.Errorf("dd to %s failed %d\n%s\n%s", newfile, result.Exit, strings.Join(result.Stdout, "\n"), strings.Join(result.Stderr, "\n"))
+	}
+
+	return nil
+}
+
+func createNetwork(d *virtpb.Droplet) error {
+	if d.Networks != nil {
+		// network already done
+		return nil
+	}
+	if len(d.Networks) > 0 {
+		// network already done
+		return nil
+	}
+
+	n := new(virtpb.Network)
+	n.Mac = getNewMac()
+	n.Name = "worldbr"
+	d.Networks = append(d.Networks, n)
+
+	return nil
+}
+
+func getNewMac() string {
+	// mac address map to check for duplicates
+	var macs map[string]string
+	macs = make(map[string]string)
+
+	loop := me.cluster.DropletsAll() // get the list of droplets
+	for loop.Scan() {
+		d := loop.Next()
+		for _, n := range d.Networks {
+			// log.Println("network:", n.Mac, d.Uuid, d.Hostname)
+			if _, ok := macs[n.Mac]; ok {
+				// UUID already exists
+				log.Info("duplicate MAC", n.Mac, macs[n.Mac])
+				log.Info("duplicate MAC", n.Mac, d.Hostname)
+				return ""
+			}
+			macs[n.Mac] = d.Hostname
+		}
+	}
+
+	return generateMAC(macs)
+}
+
+func generateMAC(macs map[string]string) string {
+	prefix := []byte{0x22, 0x22, 0x22}
+	for {
+		// Generate last 3 bytes randomly
+		suffix := make([]byte, 3)
+		if _, err := rand.Read(suffix); err != nil {
+			log.Fatalf("Failed to generate random bytes: %v", err)
+		}
+
+		// Format full MAC address
+		mac := fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
+			prefix[0], prefix[1], prefix[2],
+			suffix[0], suffix[1], suffix[2])
+
+		// Check if MAC is already used
+		if _, exists := macs[mac]; !exists {
+			log.Println("Using new MAC:", mac)
+			return mac
+		}
+		log.Println("MAC already defined:", mac)
+	}
+}

start.go

@@ -52,15 +52,14 @@ func Start(id string) (string, error) {
 	}
 
 	if d.Current == nil {
-		// result = d.Hostname + " d.Current == nil"
-		// return result, errors.New(result)
+		d.Current = new(virtpb.Current)
+	}
 
 	// is the droplet already on?
 	if d.Current.State == virtpb.DropletState_ON {
 		result = "EVENT start droplet " + d.Hostname + " is already ON"
 		return result, errors.New(result)
 	}
-	}
 
 	// make the list of hypervisors that are active and can start new droplets
 	var pool []*HyperT

validate.go

@@ -15,7 +15,6 @@ package main
 
 import (
 	"errors"
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -163,40 +162,6 @@ func ValidateDiskFilenames() ([]*virtpb.Event, error) {
 	return alle, nil
 }
 
-func getNewMac() string {
-	// mac address map to check for duplicates
-	var macs map[string]string
-	macs = make(map[string]string)
-
-	loop := me.cluster.DropletsAll() // get the list of droplets
-	for loop.Scan() {
-		d := loop.Next()
-		for _, n := range d.Networks {
-			// log.Println("network:", n.Mac, d.Uuid, d.Hostname)
-			if _, ok := macs[n.Mac]; ok {
-				// UUID already exists
-				log.Info("duplicate MAC", n.Mac, macs[n.Mac])
-				log.Info("duplicate MAC", n.Mac, d.Hostname)
-				return ""
-			}
-			macs[n.Mac] = d.Hostname
-		}
-	}
-
-	var i int = 9
-	var mac string
-	for {
-		mac = fmt.Sprintf("22:22:22:22:22:%02d", i)
-		if _, ok := macs[mac]; ok {
-			log.Info("MAC already defined", mac, macs[mac])
-			i += 1
-			continue
-		}
-		log.Info("using new MAC:", mac)
-		return mac
-	}
-}
-
 // consistancy check. run on a regular basis
 //
 // runs on startup. dies if there are duplicates