backport owls-99865 to release/3.4 branch (#3202)

* validate that domainUID is a valid WebLogic domain name

* add comment to validateDomainUid method

* backport from main

Author: alai8

kubernetes/samples/scripts/common/validate.sh

@@ -82,6 +82,28 @@ function validateLowerCase {
   fi
 }
 
+#
+# Function to check if a value is a valid WLS domain name.
+# must include only alphanumeric characters, hyphens (-)
+# or underscore characters (_) and contain at least one letter
+# but must start with an alphanumeric or underscore character.
+#
+# $1 - name of object being checked
+# $2 - value to check
+validateWlsDomainName() {
+  echo "validateWlsDomainName called with $2"
+  if ! [[ "$2" =~ ^[a-z_][a-z0-9_.-]*$ ]] ; then
+    validationError "$1 with value of $2 is not a valid WebLogic domain name. "\
+     "A valid WebLogic domain name must include only alphanumeric characters, hyphens (-) "\
+     "or underscore characters (_) but must start with an alphanumeric or underscore character."
+  else
+    if ! [[ "$2" =~ ^.*[a-z0-9].*$ ]] ; then
+      validationError "$1 with value of $2 is not a valid WebLogic domain name. "\
+       "A valid WebLogic domain name must contain at least one alphanumeric character."
+    fi
+  fi
+}
+
 #
 # Function to check if a value is lowercase and legal DNS name
 # $1 - name of object being checked
@@ -112,10 +134,13 @@ function validateVersion {
 
 #
 # Function to ensure the domain uid is a legal DNS name
+# Because the domain uid is also used as a WebLogic domain
+# name, it must also be a valid WebLogic domain name.
 #
 function validateDomainUid {
-  validateLowerCase "domainUID" ${domainUID}
-  validateDNS1123LegalName domainUID ${domainUID}
+  validateLowerCase "domainUID" "${domainUID}"
+  validateDNS1123LegalName "domainUID" "${domainUID}"
+  validateWlsDomainName "domainUID" "${domainUID}"
 }
 
 #