microcloud/cmd/microcloud: Clearer join process comments

Signed-off-by: Max Asnaashari <[email protected]>

microcloud/cmd/microcloud/main_init.go

@@ -339,18 +339,23 @@ func waitForJoin(sh *service.Handler, clusterSize map[types.ServiceType]int, sec
 		clustered[tokenInfo.Service] = false
 	}
 
+	// Iterate over all services until the database is updated with the new node across all of them.
 	now := time.Now()
 	for len(clustered) != 0 {
 		if time.Since(now) >= time.Second*30 {
 			return fmt.Errorf("Timed out waiting for cluster member %q to appear", peer)
 		}
 
+		// Check the size of the cluster for each service.
 		for service := range clustered {
 			systems, err := sh.Services[service].ClusterMembers(context.Background(), nil)
 			if err != nil {
 				return err
 			}
 
+			// If the size of the cluster has been incremented by 1 from its initial value,
+			// then we don't need to check the corresponding service anymore.
+			// So remove the service from consideration and update the current cluster size for the next node.
 			if len(systems) == clusterSize[service]+1 {
 				delete(clustered, service)
 				clusterSize[service] = clusterSize[service] + 1