feat(kube-vip)!: Use auto detection of kube-vip interface (#331)

* Remove kube-vip interface config setting

* Remove kube-vip interface Ansible variable

* Remove kube-vip interface from cluster manifest

* Remove kube-vip interface from Ansible deployment

* Delete checks for consistent kube-vip interface names

* Remove checks task from Ansible role

.config.sample.env

@@ -36,12 +36,6 @@ export BOOTSTRAP_METALLB_TRAEFIK_ADDR=""
 # e.g. age15uzrw396e67z9wdzsxzdk7ka0g2gr3l460e0slaea563zll3hdfqwqxdta
 export BOOTSTRAP_AGE_PUBLIC_KEY=""
 
-# The network interface on the host kube-vip should attach to
-# Look this up on your nodes to verify what NIC to use
-# This name should be the same across your nodes, see:
-# https://github.com/k8s-at-home/template-cluster-k3s/issues/310
-# e.g. eno1
-export BOOTSTRAP_KUBE_VIP_INTERFACE=""
 # The IP Address to use with KubeVIP
 # Pick a unused IP that is on the same network as your nodes
 # and outside the ${BOOTSTRAP_METALLB_LB_RANGE} range

provision/ansible/playbooks/templates/kube-vip-daemonset.yaml.j2

@@ -27,8 +27,6 @@ spec:
           env:
             - name: vip_arp
               value: "true"
-            - name: vip_interface
-              value: "{{ kubevip_interface }}"
             - name: port
               value: "6443"
             - name: vip_cidr

provision/ansible/roles/ubuntu/tasks/checks.yml

@@ -1,17 +0,0 @@
----
-- name: Check if network interface provided for kube-vip is valid
-  ansible.builtin.assert:
-    that:
-      - ansible_{{ kubevip_interface }}.device is defined
-      - ansible_{{ kubevip_interface }}['ipv4']['address'] | ansible.utils.ipaddr('{{ ansible_host }}')
-    success_msg: |-
-      kube-vip is able to use {{ kubevip_interface }} for this node
-    fail_msg: |-
-      This node does not have a network interface called {{ kubevip_interface }}.
-
-      You either provided the wrong BOOTSTRAP_KUBE_VIP_INTERFACE value or your nodes have different network interface names.
-
-      See this link on how to set static interface names across your nodes by using netplan
-      https://askubuntu.com/a/1317043
-  when:
-    "'master' in group_names"

provision/ansible/roles/ubuntu/tasks/main.yml

@@ -1,8 +1,4 @@
 ---
-- include: checks.yml
-  tags:
-    - checks
-
 - include: locale.yml
   tags:
     - locale

tmpl/ansible/kube-vip.yml

@@ -1,5 +1,3 @@
 ---
-# (string) The interface on the host kube-vip should attach to
-kubevip_interface: "${BOOTSTRAP_KUBE_VIP_INTERFACE}"
 # (string) The ARP address kube-vip broadcasts
 kubevip_address: "${BOOTSTRAP_KUBE_VIP_ADDR}"

tmpl/cluster/kube-vip-daemonset.yaml

@@ -27,8 +27,6 @@ spec:
           env:
             - name: vip_arp
               value: "true"
-            - name: vip_interface
-              value: "${BOOTSTRAP_KUBE_VIP_INTERFACE}"
             - name: port
               value: "6443"
             - name: vip_cidr