1 files changed, 26 insertions, 0 deletions
diff --git a/pkg/specgen/ports.go b/pkg/specgen/ports.go
new file mode 100644
index 000000000..940b2a564
--- /dev/null
+++ b/pkg/specgen/ports.go
@@ -0,0 +1,26 @@
+package specgen
+
+import (
+	"net"
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+// Find a random, open port on the host
+func GetRandomPort() (int, error) {
+	l, err := net.Listen("tcp", ":0")
+	if err != nil {
+		return 0, errors.Wrapf(err, "unable to get free TCP port")
+	}
+	defer l.Close()
+	_, randomPort, err := net.SplitHostPort(l.Addr().String())
+	if err != nil {
+		return 0, errors.Wrapf(err, "unable to determine free port")
+	}
+	rp, err := strconv.Atoi(randomPort)
+	if err != nil {
+		return 0, errors.Wrapf(err, "unable to convert random port to int")
+	}
+	return rp, nil
+}