Check if user has a correct cluster-cidr and service-cidr config

pkg/agent/run.go

@@ -2,6 +2,7 @@ package agent
 
 import (
 	"context"
+	"fmt"
 	"net"
 	"os"
 	"path/filepath"
@@ -64,11 +65,19 @@ func run(ctx context.Context, cfg cmds.Agent, proxy proxy.Proxy) error {
 	}
 	serviceIPv4 := utilsnet.IsIPv4CIDR(nodeConfig.AgentConfig.ServiceCIDR)
 	clusterIPv4 := utilsnet.IsIPv4CIDR(nodeConfig.AgentConfig.ClusterCIDR)
+	nodeIPv4 := utilsnet.IsIPv4String(nodeConfig.AgentConfig.NodeIP)
 	serviceIPv6 := utilsnet.IsIPv6CIDR(nodeConfig.AgentConfig.ServiceCIDR)
 	clusterIPv6 := utilsnet.IsIPv6CIDR(nodeConfig.AgentConfig.ClusterCIDR)
+	nodeIPv6 := utilsnet.IsIPv6String(nodeConfig.AgentConfig.NodeIP)
+	if (serviceIPv6 != clusterIPv6) || (dualCluster != dualService) || (serviceIPv4 != clusterIPv4) {
+		return fmt.Errorf("cluster-cidr: %v and service-cidr: %v, must share the same IP version (IPv4, IPv6 or dual-stack)", nodeConfig.AgentConfig.ClusterCIDRs, nodeConfig.AgentConfig.ServiceCIDRs)
+	}
+	if (clusterIPv6 != nodeIPv6) || (dualCluster != dualNode) || (clusterIPv4 != nodeIPv4) {
+		return fmt.Errorf("cluster-cidr: %v and node-ip: %v, must share the same IP version (IPv4, IPv6 or dual-stack)", nodeConfig.AgentConfig.ClusterCIDRs, nodeConfig.AgentConfig.NodeIPs)
+	}
+	enableIPv6 := dualCluster || clusterIPv6
+	enableIPv4 := dualCluster || clusterIPv4
 
-	enableIPv4 := dualCluster || dualService || dualNode || serviceIPv4 || clusterIPv4
-	enableIPv6 := dualCluster || dualService || dualNode || serviceIPv6 || clusterIPv6
 	conntrackConfig, err := getConntrackConfig(nodeConfig)
 	if err != nil {
 		return errors.Wrap(err, "failed to validate kube-proxy conntrack configuration")