fix github issue 17475

If there are multiple clusterNetworkCIDR values on startup when generating the SubnetAllocators for each range
"Provided subnet doesn't belong to network" gets printed after each subnet that belongs to a different range.

I sorted the list of subnets so that each call to NewSubnetAllocator has the list of subnets that are within the clusterNetworkCIDR's range

pkg/network/master/subnets.go

@@ -22,24 +22,34 @@ import (
 )
 
 func (master *OsdnMaster) SubnetStartMaster(clusterNetworks []common.ClusterNetwork) error {
-	subrange := make([]string, 0)
+	subrange := make(map[common.ClusterNetwork][]string)
 	subnets, err := master.networkClient.Network().HostSubnets().List(metav1.ListOptions{})
 	if err != nil {
 		glog.Errorf("Error in initializing/fetching subnets: %v", err)
 		return err
 	}
 	for _, sub := range subnets.Items {
-		subrange = append(subrange, sub.Subnet)
 		if err = master.networkInfo.ValidateNodeIP(sub.HostIP); err != nil {
 			// Don't error out; just warn so the error can be corrected with 'oc'
 			glog.Errorf("Failed to validate HostSubnet %s: %v", common.HostSubnetToString(&sub), err)
 		} else {
 			glog.Infof("Found existing HostSubnet %s", common.HostSubnetToString(&sub))
+			_, subnetIP, err := net.ParseCIDR(sub.Subnet)
+			if err != nil {
+				return fmt.Errorf("Failed to parse network address: %q", sub.Subnet)
+			}
+
+			for _, cn := range clusterNetworks {
+				if cn.ClusterCIDR.Contains(subnetIP.IP) {
+					subrange[cn] = append(subrange[cn], sub.Subnet)
+					break
+				}
+			}
 		}
 	}
 	var subnetAllocatorList []*netutils.SubnetAllocator
 	for _, cn := range clusterNetworks {
-		subnetAllocator, err := netutils.NewSubnetAllocator(cn.ClusterCIDR.String(), cn.HostSubnetLength, subrange)
+		subnetAllocator, err := netutils.NewSubnetAllocator(cn.ClusterCIDR.String(), cn.HostSubnetLength, subrange[cn])
 		if err != nil {
 			return err
 		}