feat: introduce cluster events

pkg/cluster/events.go

@@ -0,0 +1,34 @@
+package cluster
+
+import (
+	"log"
+
+	"github.com/0x1d/rcond/pkg/network"
+	"github.com/0x1d/rcond/pkg/system"
+)
+
+func ClusterEventsMap() map[string]func([]byte) {
+	return map[string]func([]byte){
+		"printHostname": printHostname,
+		"restart":       restart,
+		"shutdown":      shutdown,
+	}
+}
+
+func restart(payload []byte) {
+	if err := system.Restart(); err != nil {
+		log.Printf("(ClusterEvent:restart) failed: %s", err)
+	}
+}
+
+func shutdown(payload []byte) {
+	if err := system.Shutdown(); err != nil {
+		log.Printf("(ClusterEvent:shutdown) failed: %s", err)
+	}
+}
+
+// just a sample function to test event functionality
+func printHostname(payload []byte) {
+	hostname, _ := network.GetHostname()
+	log.Printf("(ClusterEvent:printHostname): %s", hostname)
+}