Give a proper error when misusing OPENSHIFT_INSTALL_AZURE_EMULATE_SIN…

…GLESTACK_IPV6
openshift · Feb 24, 2020 · fd2e2e4 · fd2e2e4
1 parent 013bcf8
commit fd2e2e4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pkg/tfvars/azure/azure.go b/pkg/tfvars/azure/azure.go
@@ -2,6 +2,7 @@ package azure
 
 import (
 	"encoding/json"
+	"fmt"
 	"net"
 	"os"
 
@@ -78,6 +79,9 @@ func TFVars(sources TFVarsSources) ([]byte, error) {
 
 	var emulateSingleStackIPv6 bool
 	if os.Getenv("OPENSHIFT_INSTALL_AZURE_EMULATE_SINGLESTACK_IPV6") == "true" {
+		if len(machineV4CIDRStrings) == 0 || len(machineV6CIDRStrings) == 0 {
+			return nil, fmt.Errorf("OPENSHIFT_INSTALL_AZURE_EMULATE_SINGLESTACK_IPV6 requires a dual-stack install-config")
+		}
 		emulateSingleStackIPv6 = true
 	}