diff --git a/core/src/main/python/wlsdeploy/tool/util/k8s_helper.py b/core/src/main/python/wlsdeploy/tool/util/k8s_helper.py
index 105d5c523..a8937fcbe 100644
--- a/core/src/main/python/wlsdeploy/tool/util/k8s_helper.py
+++ b/core/src/main/python/wlsdeploy/tool/util/k8s_helper.py
@@ -5,6 +5,8 @@
 Methods and constants for building Kubernetes resource files,
 including domain resource configuration for WebLogic Kubernetes Operator.
 """
+import re
+
 from wlsdeploy.aliases import alias_utils
 from wlsdeploy.aliases.model_constants import CLUSTER
 from wlsdeploy.aliases.model_constants import DYNAMIC_CLUSTER_SIZE
@@ -17,10 +19,14 @@
 def get_domain_uid(domain_name):
     """
     Determine the domain UID based on domain name.
+    The domain UID must be DNS-1123 compatible, with the pattern ^[a-z0-9-.]{1,253}$
     :param domain_name: the domain name to be checked
     :return: the domain UID
     """
-    return domain_name.lower()
+    result = domain_name.lower()
+    # replace any disallowed character with hyphen
+    result = re.sub('[^a-z0-9-.]', '-', result)
+    return result
 
 
 def get_server_count(cluster_name, cluster_values, model_dictionary):
diff --git a/core/src/test/python/wlsdeploy/tool/util/k8s_helper_test.py b/core/src/test/python/wlsdeploy/tool/util/k8s_helper_test.py
new file mode 100644
index 000000000..5c54e30f1
--- /dev/null
+++ b/core/src/test/python/wlsdeploy/tool/util/k8s_helper_test.py
@@ -0,0 +1,29 @@
+"""
+Copyright (c) 2020, Oracle Corporation and/or its affiliates.
+Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
+"""
+import unittest
+
+from wlsdeploy.tool.util import k8s_helper
+
+
+class K8sHelperTestCase(unittest.TestCase):
+    _program_name = 'k8s_helper_test'
+    _class_name = 'K8sHelperTestCase'
+
+    def testDomainUidCompliant(self):
+        """
+        Verify domain UID based on domain name is DNS-1123 compatible.
+        """
+        self._check_uid("base_domain", "base-domain")
+        self._check_uid("My Domain", "my-domain")
+        self._check_uid("my.a#$^!z.domain", "my.a----z.domain")
+        self._check_uid("my.123.domain", "my.123.domain")
+
+    def _check_uid(self, domain_name, expected_uid):
+        domain_uid = k8s_helper.get_domain_uid(domain_name)
+        self.assertEquals(expected_uid, domain_uid, "Domain UID for " + domain_name + " should be " + expected_uid)
+
+
+if __name__ == '__main__':
+    unittest.main()