1 files changed, 17 insertions, 0 deletions
diff --git a/cluster.go b/cluster.go
index 97da63a..a2c2391 100644
--- a/cluster.go
+++ b/cluster.go
@@ -17,3 +17,20 @@ type Cluster struct {
 	Unstable        *timestamppb.Timestamp
 	UnstableTimeout *durationpb.Duration
 }
+
+// adds a new droplet. enforce unique hostnames
+func (c *Cluster) AddDroplet(newd *Droplet) bool {
+	c.Lock()
+	defer c.Unlock()
+
+	for _, d := range c.d.Droplets {
+		if newd.Hostname == d.Hostname {
+			// boo. that one is already here
+			return false
+		}
+	}
+
+	// everything is ok, this hostname is new
+	c.d.Droplets = append(c.d.Droplets, newd)
+	return true
+}