Add a kube_vip_endpoint variable so the address kube-vip binds and listens on
can differ from the announced apiserver_endpoint. This is useful for complex
routing and site-to-site tunnels where the VIP kube-vip advertises over ARP
differs from the address it listens on internally.
- roles/k3s_server/templates/vip.yaml.j2: use kube_vip_endpoint (defaulting to
apiserver_endpoint) for the `address` env and for deriving `vip_subnet`
- roles/k3s_server/defaults/main.yml: add kube_vip_endpoint default (null)
- roles/k3s_server/meta/main.yml: add kube_vip_endpoint argument_spec
- inventory/sample/group_vars/all.yml: document the new sample variable
- README.md: document the kube_vip_endpoint option
- .github/scripts/test-kube-vip-manifest.py: extend regression test to cover the
default (apiserver_endpoint) and the override case
Closes#221
280cbd0283