Disallow digit at beginning, and max 20 characters

3 files changed, 7 insertions, 3 deletions

diff --git a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/ApplicationId.java b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/ApplicationId.java
index 0a5f2809780..fceecedb9fe 100644
--- a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/ApplicationId.java
+++ b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/ApplicationId.java
@@ -22,7 +22,7 @@ public class ApplicationId extends NonDefaultIdentifier {
 
     public static void validate(String id) {
         if (!isLegal(id)) {
-            throwInvalidId(id, "Must match pattern " + strictPattern, "application");
+            throwInvalidId(id, strictPatternExplanation);
         }
     }
 
diff --git a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/Identifier.java b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/Identifier.java
index a7ac1882159..2fd75e25498 100644
--- a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/Identifier.java
+++ b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/Identifier.java
@@ -12,7 +12,11 @@ import java.util.regex.Pattern;
  */
 public abstract class Identifier {
 
-    protected static final Pattern strictPattern = Pattern.compile("^(?=.{1,28}$)[a-z0-9](-?[a-z0-9]+)*$");
+    protected static final String strictPatternExplanation =
+            "New tenant or application names must start with a letter, may contain no more than 20 " +
+            "characters, and may only contain lowercase letters, digits or dashes, but no double-dashes.";
+    // TODO: Use this also for instances, if they ever get proper support.
+    protected static final Pattern strictPattern = Pattern.compile("^(?=.{1,20}$)[a-z](-?[a-z0-9]+)*$");
     private static final Pattern serializedIdentifierPattern = Pattern.compile("[a-zA-Z0-9_-]+");
     private static final Pattern serializedPattern = Pattern.compile("[a-zA-Z0-9_.-]+");
 
diff --git a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/TenantId.java b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/TenantId.java
index 82cd6d80ec8..2c619fb58ef 100644
--- a/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/TenantId.java
+++ b/controller-api/src/main/java/com/yahoo/vespa/hosted/controller/api/identifiers/TenantId.java
@@ -22,7 +22,7 @@ public class TenantId extends NonDefaultIdentifier {
 
     public static void validate(String id) {
         if (!strictPattern.matcher(id).matches()) {
-            throwInvalidId(id, "Must match pattern " + strictPattern, "tenant");
+            throwInvalidId(id, strictPatternExplanation);
         }
     }