have to close domains or things hang

Signed-off-by: Jeff Carr <jcarr@wit.com>

hypervisior.go

@@ -18,7 +18,7 @@ import (
 	"fmt"
 	"log"
 
-	hypervisor "github.com/digitalocean/go-qemu/hypervisor"
+	"github.com/digitalocean/go-qemu/hypervisor"
 	"github.com/digitalocean/go-qemu/qemu"
 )
 
@@ -63,6 +63,15 @@ func poolHypervisor(hv *hypervisor.Hypervisor) string {
 			fmt.Println("OFF", status, name, drives)
 			out += "OFF " + name + "\n"
 		}
+
+		// Close the domain to clean up its resources and underlying monitor.
+		// todo: store dom and reuse it? not closing it hangs libvirt eventually because it leaves dangling
+		// connects that rack up and all block in virNetSocketReadWire:1781
+		// probably this doesn't matter because NOTHING HERE IS DONE IN HIGH FREQUENCY EVER.
+		// domU changes hardly ever happen
+		if err := dom.Close(); err != nil {
+			log.Fatalf("failed to close domain: %v", err)
+		}
 	}
 	return out
 }

main.go

@@ -20,7 +20,7 @@ import (
 	"net"
 	"time"
 
-	hypervisor "github.com/digitalocean/go-qemu/hypervisor"
+	"github.com/digitalocean/go-qemu/hypervisor"
 )
 
 var Version string