MetalLBConfig

Available as TechPreview since 2.21.0 and 2.21.1 for MOSK 22.5

Caution

This feature is available as Technology Preview. Use such configuration for testing and evaluation purposes only. For the Technology Preview feature definition, refer to Technology Preview features.

This section describes the MetalLBConfig custom resource used in the Container Cloud API that contains the MetalLB configuration objects for a particular cluster.

For demonstration purposes, the Container Cloud MetalLBConfig custom resource is split into the following major sections:

The Container Cloud API also uses the third-party open source MetalLB API. For details, see MetalLB objects.

MetalLBConfig metadata

The Container Cloud MetalLBConfig CR contains the following fields:

  • apiVersion

    API version of the object that is kaas.mirantis.com/v1alpha1.

  • kind

    Object type that is MetalLBConfig.

The metadata object field of the MetalLBConfig resource contains the following fields:

  • name

    Name of the MetalLBConfig object.

  • namespace

    Project in which the object was created. Must match the project name of the target cluster.

  • labels

    Key-value pairs attached to the object:

    • kaas.mirantis.com/provider

      Provider type that is baremetal.

    • kaas.mirantis.com/region

      Region name that matches the region name of the target cluster.

    • cluster.sigs.k8s.io/cluster-name

      Name of the cluster that this MetalLB configuration should be applied to.

    Warning

    Labels and annotations that are not documented in this API Reference are generated automatically by Container Cloud. Do not modify them using the Container Cloud API.

Configuration example:

apiVersion: kaas.mirantis.com/v1alpha1
kind: MetalLBConfig
metadata:
  name: metallb-demo
  namespace: test-ns
  labels:
    kaas.mirantis.com/provider: baremetal
    kaas.mirantis.com/region: region-one
    cluster.sigs.k8s.io/cluster-name: test-cluster

MetalLBConfig spec

The spec field of the MetalLBConfig object represents the MetalLBConfigSpec subresource that contains the description of MetalLB configuration objects. These objects are created on the target cluster during its deployment.

The spec field contains the following optional fields:

  • addressPools

    List of MetalLBAddressPool objects to create MetalLB AddressPool objects.

  • bfdProfiles

    List of MetalLBBFDProfile objects to create MetalLB BFDProfile objects.

  • bgpAdvertisements

    List of MetalLBBGPAdvertisement objects to create MetalLB BGPAdvertisement objects.

  • bgpPeers

    List of MetalLBBGPPeer objects to create MetalLB BGPPeer objects.

  • communities

    List of MetalLBCommunity objects to create MetalLB Community objects.

  • ipAddressPools

    List of MetalLBIPAddressPool objects to create MetalLB IPAddressPool objects.

  • l2Advertisements

    List of MetalLBL2Advertisement objects to create MetalLB L2Advertisement objects.


The objects listed in the spec field of the MetalLBConfig object, such as MetalLBIPAddressPool, MetalLBL2Advertisement, and so on, are used as templates for the MetalLB objects that will be created on the target cluster. Each of these objects has the following structure:

  • labels

    Optional. Key-value pairs attached to the metallb.io/<objectName> object as metadata.labels.

  • name

    Name of the metallb.io/<objectName> object.

  • spec

    Contents of the spec section of the metallb.io/<objectName> object. The spec field has the metallb.io/<objectName>Spec type. For details, see MetalLB objects.

For example, MetalLBIPAddressPool is a template for the metallb.io/IPAddressPool object and has the following structure:

  • labels

    Optional. Key-value pairs attached to the metallb.io/IPAddressPool object as metadata.labels.

  • name

    Name of the metallb.io/IPAddressPool object.

  • spec

    Contents of spec section of the metallb.io/IPAddressPool object. The spec has the metallb.io/IPAddressPoolSpec type.

MetalLB objects

Container Cloud supports the following MetalLB object types of the metallb.io API group:

  • AddressPool

  • IPAddressPool

  • Community

  • L2Advertisement

  • BFDProfile

  • BGPAdvertisement

  • BGPPeer

As of v1beta1 and v1beta2 API versions, metadata of MetalLB objects has a standard format with no specific fields or labels defined for any particular object:

  • apiVersion

    API version of the object that can be metallb.io/v1beta1 or metallb.io/v1beta2 for Container Cloud v2.21.

  • kind

    Object type that is one of the metallb.io types listed above. For example, AddressPool.

  • metadata

    Object metadata that contains the following subfields:

    • name

      Name of the object.

    • namespace

      Namespace where the MetalLB components are located. It matches metallb-system in Container Cloud.

    • labels

      Optional. Key-value pairs that are attached to the object. It can be an arbitrary set of labels. No special labels are defined as of v1beta1 and v1beta2 API versions.

The MetalLBConfig object contains spec sections of the metallb.io/<objectName> objects that have the metallb.io/<objectName>Spec type. For metallb.io/<objectName> and metallb.io/<objectName>Spec types definitions, refer to the official MetalLB documentation:

MetalLB configuration examples

Configuration example for L2 announcements:

apiVersion: kaas.mirantis.com/v1alpha1
kind: MetalLBConfig
metadata:
  labels:
    cluster.sigs.k8s.io/cluster-name: managed-cluster
    kaas.mirantis.com/region: region-one
  name: child-l2
  namespace: managed-ns
spec:
  ipAddressPools:
    - name: services
      spec:
        addresses:
          - 10.100.91.151-10.100.91.170
        autoAssign: true
        avoidBuggyIPs: false
  l2Advertisements:
    - name: services
      spec:
        ipAddressPools:
        - services

The following MetalLB objects will be created in the managed-ns/managed-cluster cluster during deployment:

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: services
  namespace: metallb-system
spec:
  addresses:
  - 10.100.91.151-10.100.91.170
  autoAssign: true
  avoidBuggyIPs: false
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
  name: services
  namespace: metallb-system
spec:
  ipAddressPools:
  - services

Configuration example for BGP announcements:

apiVersion: kaas.mirantis.com/v1alpha1
kind: MetalLBConfig
metadata:
  labels:
    cluster.sigs.k8s.io/cluster-name: managed-cluster
    kaas.mirantis.com/region: region-one
  name: child-bgp
  namespace: managed-ns
spec:
  bgpPeers:
    - name: bgp-peer-rack1
      spec:
        peerAddress: 10.0.41.1
        peerASN: 65013
        myASN: 65099
        nodeSelectors:
          - matchLabels:
              rack-id: rack1
    - name: bgp-peer-rack2
      spec:
        peerAddress: 10.0.42.1
        peerASN: 65023
        myASN: 65099
        nodeSelectors:
          - matchLabels:
              rack-id: rack2
    - name: bgp-peer-rack3
      spec:
        peerAddress: 10.0.43.1
        peerASN: 65033
        myASN: 65099
        nodeSelectors:
          - matchLabels:
              rack-id: rack3
  ipAddressPools:
    - name: services
      spec:
        addresses:
          - 10.100.191.151-10.100.191.170
        autoAssign: true
        avoidBuggyIPs: false
  bgpAdvertisements:
    - name: services
      spec:
        ipAddressPools:
        - services

See also