Custom load balancers

Charmed Kubernetes supports setting a custom IP address for the control plane. There are two ways of achieving this, depending on which type of load balancing solution you wish to configure:

  • If you have a virtual IP to place in front of machines, configure the settings on the kubeapi-load-balancer charm.

  • If a full load balancing solution is in place such as an F5 appliance, remove the kubeapi-load-balancer and use the settings on the kubernetes-master charm to configure the load balancer.

Both solutions are described in the sections below.

Virtual IP in front of kubeapi-load-balancer

If you have a virtual IP in front of the kubeapi-load-balancer units which isn't charm based, you should use the loadbalancer-ips configuration to specify them:

juju config kubeapi-load-balancer loadbalancer-ips="10.0.0.1 10.0.0.2"

Multiple IP addresses should be given as a space-separated list.

Custom load balancer in front of kubernetes-master charm

If you have a full load balancer such as an F5 appliance or OpenStack's Neutron, use the configuration options on the kubernetes-master charm and forgo kubeapi-load-balancer entirely.

Remove the kubeapi-load-balancer application if it exists:

juju remove-application kubeapi-load-balancer

Then configure the IP addresses provided by the load balancing solution with the kubernetes-master charm.

juju config kubernetes-master loadbalancer-ips="192.168.1.1 192.168.2.1"

Multiple IP addresses should be given as a space-separated list.

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