Update all.yml

Added kube_vip_iface variable

inventory/sample/group_vars/all.yml

@@ -10,6 +10,9 @@ system_timezone: "Your/Timezone"
 # interface which will be used for flannel
 flannel_iface: "eth0"
 
+# interface which will be used for kube-vip
+kube_vip_iface: "eth0"
+
 # uncomment calico_iface to use tigera operator/calico cni instead of flannel https://docs.tigera.io/calico/latest/about
 # calico_iface: "eth0"
 calico_ebpf: false           # use eBPF dataplane instead of iptables