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MetalLB Basic Setup

The guide walks through a basic configuration of MetalLB for a single address pool on a layer 2 network. This will allow assigning different IP addresses by app.


  • Add the system & premium trains to your TrueCharts Catalog.


1. Install MetalLB Operator from system Train


Install metallb from system train first. There is no config, so just hit save.

If you encounter an error upon install, run the following command as root from system settings -> shell and attempt the install again: k3s kubectl delete --grace-period 30 --v=4 -k

If you previously had metallb installed and encounter an error, delete the old version, then run the above command before proceeding to install the metallb operator.

2. Set Address Pool & L2 Advertisement in MetalLB-Config

Install metallb-config from premium train and create a new entry under Configure IP Address Pools Object


  • Name: Enter a general name for this IP range. Something like apps or charts for this field is fine.
  • Auto Assign: if you want MetalLB Services to auto-assign IPs from the configured address pool without needing to specify per app. Recommendation is to keep this checked. You can still specify an IP for apps as needed (see step 3).

Create a single entry under Configure Address Pools

  • Address Pool Entry: Specify an IP range for MetalLB to assign IPs that is OUTSIDE your current DHCP range on your LAN. For example, if your DHCP range is, then your entry can be any range below This entry can also be specified in CIDR format.

For users with VLANs or multiple subnets, you may create create additional address pool objects as needed.


Create a new entry under Configure L2 Advertisements.

  • Name: Enter a basic name for your layer 2 advertisement.
  • Address Pool Entry: This should match the name of the address pool created above (not the IP range itself).

3. Optional: Specify IP Address per App or Service


With MetalLB installed, it’s recommended (but optional) to specify IP addresses for your apps.

For each app, under Networking and Services, select LoadBalancer Service Type for the Main Service.

In the LoadBalancer IP field, specify an IP address that is within the MetalLB address pool that you configured. Apply the same IP address to the LoadBalancer IP field on other services within the app.

4. Disable SCALE’s Default LoadBalancer

With MetalLB installed and configured, you must now disable SCALE’s default LoadBalancer.

In the SCALE UI, under Apps > Settings > Advanced Settings


Uncheck Enable Integrated LoadBalancer.

This will trigger a restart of Kubernetes and all apps. After roughly 5-10 minutes, your apps will redeploy using the MetalLB-assigned IP addresses.

5. Verify IP Addresses Are Assigned

From your SCALE shell, run the command k3s kubectl get svc -A to verify the IP addresses assigned for each of your apps. The IPs will be listed under the EXTERNAL-IP column.

If you have an IP conflict with a previously assigned address it will show as <pending>.

You may need to do a system reboot as well to properly resolve the conflict.

For details on other configuration options, please reference the MetaLB documentation.