KubeLB CLI for non-kubernetes usage

[ahmedwaleedmalik]

User Story As a KubeLB user/admin, I'd like to utilize KubeLB to provide LoadBalancers L4/L7 outside of Kubernetes as well.

Solution details Introduce KubeLB CLI, which can take YAML as input and create the required configurations on the management cluster. For now, this will only support L4 load balancing.

For example, create an LB like the following on the consumer cluster:

1. loadbalancer.yaml

   apiVersion: kubelb.k8c.io/v1alpha1
   kind: LoadBalancer
   metadata:
   name: loadbalancer
   spec:
   endpoints:
   - addresses:
       - ip: 168.119.189.211
       - ip: 168.119.185.115
     ports:
       - name: a-port
         port: 32019
         protocol: TCP
   ports:
   - name: a-port
     port: 8080
     protocol: TCP

2. Run kubelb create --loadbalancer loadbalancer.yaml --management-cluster ${path-to-kubeconfig-for-management-cluster}

This should result in the creation of an LB, and CLI should wait for the status to be populated to output the LB IP to the user.

Acceptance criteria Needs more planning to finalize the feature set for the CLI

• [ ] Introduce KubeLB CLI
• [ ] Ensure that it's compliant with multiple architectures
• [ ] Documentation

[toschneck]

Maybe a krew plugin could also do the job

[ahmedwaleedmalik]

Maybe a krew plugin could also do the job

@toschneck The idea is to run this outside of Kubernetes and directly on the VMs themselves. In that case, relying on Kubectl and Krew doesn't sound ideal.