pkg/hostagent/events: Add GuestIP net.IP field to Status

Support printing "Guest IP Address: %s" on `limactl start`

Signed-off-by: Norio Nomura <norio.nomura@gmail.com>

# Conflicts:
#	pkg/hostagent/requirements.go

Author: norio-nomura

pkg/hostagent/events/events.go

@@ -4,6 +4,7 @@
 package events
 
 import (
+	"net"
 	"time"
 )
 
@@ -16,6 +17,9 @@ type Status struct {
 
 	Errors []string `json:"errors,omitempty"`
 
+	// Guest IP address directly accessible from the host.
+	GuestIP net.IP `json:"guestIP,omitempty"`
+	// SSH local port on the host forwarded to the guest's port 22.
 	SSHLocalPort int `json:"sshLocalPort,omitempty"`
 
 	// Cloud-init progress information

pkg/hostagent/hostagent.go

@@ -363,6 +363,17 @@ func (a *HostAgent) emitCloudInitProgressEvent(ctx context.Context, progress *ev
 	a.emitEvent(ctx, ev)
 }
 
+func (a *HostAgent) emitGuestIPEvent(ctx context.Context, ip string) {
+	a.statusMu.RLock()
+	currentStatus := a.currentStatus
+	a.statusMu.RUnlock()
+
+	currentStatus.GuestIP = net.ParseIP(ip)
+
+	ev := events.Event{Status: currentStatus}
+	a.emitEvent(ctx, ev)
+}
+
 func generatePassword(length int) (string, error) {
 	// avoid any special symbols, to make it easier to copy/paste
 	return password.Generate(length, length/4, 0, false, false)

pkg/hostagent/requirements.go

@@ -391,5 +391,6 @@ func (a *HostAgent) detectGuestIPAddress(stdout string) error {
 	a.guestIPv6 = guestIPv6
 	a.guestIPMu.Unlock()
 	ctx := context.Background()
+	a.emitGuestIPEvent(ctx, a.GuestIP().String())
 	return a.WriteSSHConfigFile(ctx)
 }

pkg/instance/start.go

@@ -278,6 +278,7 @@ func watchHostAgentEvents(ctx context.Context, inst *limatype.Instance, haStdout
 
 	var (
 		printedSSHLocalPort  bool
+		printedGuestIP       bool
 		receivedRunningEvent bool
 		cloudInitCompleted   bool
 		err                  error
@@ -292,6 +293,14 @@ func watchHostAgentEvents(ctx context.Context, inst *limatype.Instance, haStdout
 			inst.SSHLocalPort = ev.Status.SSHLocalPort
 		}
 
+		if !printedGuestIP && ev.Status.GuestIP != nil {
+			logrus.Infof("Guest IP Address: %s", ev.Status.GuestIP.String())
+			printedGuestIP = true
+
+			// Update the instance's Guest IP address
+			inst.GuestIP = ev.Status.GuestIP
+		}
+
 		if showProgress && ev.Status.CloudInitProgress != nil {
 			progress := ev.Status.CloudInitProgress
 			if progress.Active && progress.LogLine == "" {