reset instanceID command

server/src/main/java/password/pwm/util/cli/MainClass.java

@@ -59,6 +59,7 @@ import password.pwm.util.cli.commands.ImportIDMConfigCommand;
 import password.pwm.util.cli.commands.ImportResponsesCommand;
 import password.pwm.util.cli.commands.LdapSchemaExtendCommand;
 import password.pwm.util.cli.commands.LocalDBInfoCommand;
+import password.pwm.util.cli.commands.ResetInstanceIDCommand;
 import password.pwm.util.cli.commands.ResponseStatsCommand;
 import password.pwm.util.cli.commands.ShellCommand;
 import password.pwm.util.cli.commands.TokenInfoCommand;
@@ -128,6 +129,7 @@ public class MainClass
         commandList.add( new ConfigResetHttpsCommand() );
         commandList.add( new HelpCommand() );
         commandList.add( new ImportIDMConfigCommand() );
+        commandList.add( new ResetInstanceIDCommand() );
 
         final Map<String, CliCommand> sortedMap = new TreeMap<>();
         for ( final CliCommand command : commandList )

server/src/main/java/password/pwm/util/cli/commands/ResetInstanceIDCommand.java

@@ -0,0 +1,56 @@
+/*
+ * Password Management Servlets (PWM)
+ * http://www.pwm-project.org
+ *
+ * Copyright (c) 2006-2009 Novell, Inc.
+ * Copyright (c) 2009-2018 The PWM Project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+package password.pwm.util.cli.commands;
+
+import password.pwm.PwmApplication;
+import password.pwm.util.cli.CliParameters;
+
+public class ResetInstanceIDCommand extends AbstractCliCommand
+{
+    public void doCommand( ) throws Exception
+    {
+        final PwmApplication pwmApplication = cliEnvironment.getPwmApplication();
+        final String currentInstanceID = pwmApplication.getInstanceID();
+        
+        if ( !promptForContinue( "Proceeding will change the existing instanceID (\"" + currentInstanceID + "\") of this server and can not be undone." ) )
+        {
+            return;
+        }
+
+        pwmApplication.writeAppAttribute( PwmApplication.AppAttribute.INSTANCE_ID, null );
+        out( "instanceID has been cleared" );
+    }
+
+    @Override
+    public CliParameters getCliParameters( )
+    {
+        final CliParameters cliParameters = new CliParameters();
+        cliParameters.commandName = "ResetInstanceID";
+        cliParameters.description = "Reset the existing instanceID ";
+        cliParameters.needsPwmApplication = true;
+        cliParameters.needsLocalDB = true;
+        cliParameters.readOnly = true;
+
+        return cliParameters;
+    }
+}