c12s-kubespray/roles/kubernetes-apps/metallb/README.md
Cristian Calin 360aff4a57
Rename ansible groups to use _ instead of - (#7552)
* rename ansible groups to use _ instead of -

k8s-cluster -> k8s_cluster
k8s-node -> k8s_node
calico-rr -> calico_rr
no-floating -> no_floating

Note: kube-node,k8s-cluster groups in upgrade CI
      need clean-up after v2.16 is tagged

* ensure old groups are mapped to the new ones
2021-04-29 05:20:50 -07:00

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# Deploy MetalLB into Kubespray/Kubernetes
MetalLB hooks into your Kubernetes cluster, and provides a network load-balancer implementation.
In short, it allows you to create Kubernetes services of type "LoadBalancer" in clusters that
don't run on a cloud provider, and thus cannot simply hook into paid products to provide load-balancers.
This addon aims to automate [MetalLB in layer 2 mode](https://metallb.universe.tf/concepts/layer2/)
or [MetalLB in BGP mode](https://metallb.universe.tf/concepts/bgp/).
It deploys MetalLB into Kubernetes and sets up a layer 2 or BGP load-balancer.
## Install
In the default, MetalLB is not deployed into your Kubernetes cluster.
You can override the defaults by copying the contents of roles/kubernetes-apps/metallb/defaults/main.yml
to somewhere in inventory/mycluster/group_vars such as inventory/mycluster/groups_vars/k8s_cluster/addons.yml
and updating metallb_enabled option to `true`.
In addition you need to update metallb_ip_range option on the addons.yml at least for suiting your network
environment, because MetalLB allocates external IP addresses from this metallb_ip_range option.