Migration

Migration is a utility that will take your static IP address mappings in OPNsense and migrate them over to the Kea DHCP server that comes with OPNsense version 24.

• You must upgrade to OPNsense version 24 before using this utility

Here is a video tutorial if that works best for you

This is a simple tool to use:

1) Download the program for your operating system (they are native binaries, no need for a Java runtime environment).

• Create a clean folder to put the program in 2) From your OPNsense interface, go to Services / Kea DHCP / Kea DHCPv4 Then Subnets on the right 3) Define all of your subnets and their IP Pools.
• The tool uses those newly created subnets to automatically assign your current reservations to the correct subnet. 4) Apply those changes 5) Go to System / Configuration / Backups 6) Click on Download Configuration
• Save the file as config.xml in the same folder you downloaded to tool into
• Make a copy of it just in case 7) Open a shell (cmd.exe or terminal etc.) and go into that folder 8) run migrate
• You should see that the file new_config.xml has been created
• If you don't then you will see a description of some problem that was found which will help you understand what needs to be fixed in your config.xml file 9) Go back into OPNsense under backups and restore this new file.
  • Make sure you UNCKECK the box that says Reboot after restore

Done!

Binaries

The binaries were compiled and tested in these operating systems

• Windows 11 (build 21996.1)
• MacOS Sonoma 14.2.1
• Ubuntu 22.0.4 LTS (Jammy Jellyfish)

With MacOS or Linux you might need to set the program as executable

chmod +x migrate

No guarantees with older versions of these operating systems.

Summary of what this utility does

• Loads config.xml into memory
• Loads existing static maps into memory from the staticmap xml node
• Loads the Kea subnets from the subnet4 xml node
• Iterates through each static mapping
  • Compares each IP address with the Kea Subnets you created looking for a match
  • Creates a new Kea DHCP static mapping using the subnet UUID from the matched subnet
  • Assigns a new random UUID to the new static map for Kea
• Converts the new mappings into xml under the node name reservations
• Replaces the reservations xml node from the original config.xml file
• Saves the modified xml to a new file named new_config.xml

Every step along the way is checked for problems and if any are found, the program tells you exactly what you need to look for to settle the problem.

Compiling

If you are a glutton for punishment and you want to compile the code yourself, these instructions will work.

Windows

Click Here to learn how to setup the Windows build environment

After following those instructions, you should have made the github folder off the root. If not:

mkdir C:\github

Next

cd C:\github
git clone https://github.com/EasyG0ing1/Migration.git
cd Migration\compile
compile.bat

It could take anywhere from a minute to ten minutes or longer to compile the native image depending on your CPU and how much RAM you have. Be patient!

The executable will be here C:\github\Migration\target\migrate.exe

MacOS and Linux

• First, install SDK Man

  curl -s "https://get.sdkman.io" | bash

• It will give you a command to copy and paste into terminal that will source the config, or simply restart your terminal.

• Next, install GraalVM v21

  sdk install java 21.0.2-graal

  (this takes about a minute-ish)

• Install Maven

  • Pick a folder to hold the maven file tree
  • Go into that folder

    cd /My/Folder
    wget https://dlcdn.apache.org/maven/maven-3/3.9.6/binaries/apache-maven-3.9.6-bin.zip
    unzip apache-maven-3.9.6-bin.zip
    mv apache-maven-3.9.6 maven3.9.6

• Edit whatever file you use to run exports when your shell starts and add

  export PATH="/My/Path/To/maven3.9.6/bin":$PATH

• Run that command in your terminal too so that you don't need to restart terminal

• Run this and expect the output shown here

  mvn --version

  Output

  Apache Maven 3.9.6
  Maven home: /My/Path/To/maven3.9.6/libexec
  Java version: 21, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/graalvm-jdk-21+35.1/Contents/Home

• If you're using MacOS and you DON'T have the xcode command line tools installed, run this

  xcode-select install

• And it will take a LOOOONG time to finish - possibly up to 20 minutes or longer. Get some coffee or water or popcorn ...

• If you're using Linux, then you need to install this

  sudo apt update
  sudo apt install build-essential libz-dev zlib1g-dev -y

• This won't take too long to install

  • We're back to ALL OS's from here

• Next, go into a folder you can clone this repository into then

  git clone https://github.com/EasyG0ing1/Migration.git
  cd Migration
  chmod +x compile.sh
  ./compile.sh
  ls -l target

• It can take some time to build the native-image. On a 2019 MBP it takes about a minute. On older hardware it can take up to 10 minutes or more, it depends on your CPU and how much RAM you have. Just be patient, if there is a problem, it will throw an error and dump out so if that didn't happen, then it's working.

• You should see the migrate binary in the target folder.

• You may need to set it as executable

  chmod +x target/migrate

Issues

If you have any problems that you can't figure out, create an issue and I will be happy to assist.

Contributing

Create an Issue or a Pull Request if you want to contribute to the project.

Updates

• 2.2.0

  • Cleaned up code to simplify
  • Removed unused pojos
  • Added enums Package
  • Added migrate Package
  • Added Migrate class
  • Cleaned up Message class and removed unused objects
  • Added Mode enum

• 2.1.4

  • Modified handling of ISC DHCP mappings when no MAC address exists where a CID value is provided
  • Updated the static mapping error messages so that they include relevant details from the static map, making it easier to locate the record for correction

• 2.1.3

  • Minor changes to code structure

• 2.1.2

  • Fixed problem where xml tags were in the wrong case in the new_config.xml

• 2.1.1

  • Added clear and expanded error messages so that any problems that might happen should always present the user with a clear and exact cause of the problem along with instructions explaining how to correct the problem

• 2.1.0

  • Removed the need to run a check before doing the migration
  • Users will get specific feedback if there are any problems which will let them know exactly what is wrong if there are any problems with the migration.

• 2.0.1

  • Minor enhancements

• 2.0.0

  • Streamlined use of XML library, eliminating unnecessary calls.
  • Program now outputs a file that can be directly imported into OPNsense

• 1.0.1

  • Added more detailed error reporting

• 1.0.0

  • Initial Release