Refactor based on comments

inventory/sample/group_vars/all.yml

@@ -7,14 +7,13 @@ systemd_dir: /etc/systemd/system
 # Set your timezone
 system_timezone: "Your/Timezone"
 
-# node interface which will be used for the container network interface (flannel or calico)
-container_iface: "eth0"
+# interface which will be used for flannel
+flannel_iface: "eth0"
 
-# set use_calico to true to use tigera operator/calico instead of the default CNI flannel
-# install reference: https://docs.tigera.io/calico/latest/getting-started/kubernetes/k3s/multi-node-install#install-calico
-use_calico: false
+# 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 https://docs.tigera.io/calico/latest/operations/ebpf
-calico_cidr: "10.52.0.0/16" # pod cidr pool
+calico_cidr: "10.52.0.0/16" # calico cluster pod cidr pool
 calico_tag: "v3.27.0" # calico version tag
 
 # apiserver_endpoint is virtual ip-address which will be configured on each master
@@ -27,14 +26,14 @@ k3s_token: "some-SUPER-DEDEUPER-secret-password"
 # The IP on which the node is reachable in the cluster.
 # Here, a sensible default is provided, you can still override
 # it for each of your hosts, though.
-k3s_node_ip: '{{ ansible_facts[container_iface]["ipv4"]["address"] }}'
+k3s_node_ip: "{{ ansible_facts[(calico_iface | default(flannel_iface))]['ipv4']['address'] }}"
 
 # Disable the taint manually by setting: k3s_master_taint = false
 k3s_master_taint: "{{ true if groups['node'] | default([]) | length >= 1 else false }}"
 
 # these arguments are recommended for servers as well as agents:
 extra_args: >-
-  {{ '--flannel-iface=' + container_iface if not use_calico else '' }}
+  {{ '--flannel-iface=' + flannel_iface if calico_iface is not defined else '' }}
   --node-ip={{ k3s_node_ip }}
 
 # change these to your liking, the only required are: --disable servicelb, --tls-san {{ apiserver_endpoint }}
@@ -42,10 +41,10 @@ extra_args: >-
 extra_server_args: >-
   {{ extra_args }}
   {{ '--node-taint node-role.kubernetes.io/master=true:NoSchedule' if k3s_master_taint else '' }}
-  {% if use_calico %}
+  {% if calico_iface is defined %}
   --flannel-backend=none
   --disable-network-policy
-  --cluster-cidr={{ calico_cidr }}
+  --cluster-cidr={{ calico_cidr | default('10.52.0.0/16') }}
   {% endif %}
   --tls-san {{ apiserver_endpoint }}
   --disable servicelb