Make kubectl binary configurable with the k3s_kubectl_binary parameter (#567)

Closes techno-tim/k3s-ansible#566

Signed-off-by: Christian Berendt <berendt@osism.tech>

roles/k3s_server/defaults/main.yml

@@ -1,6 +1,8 @@
 ---
 extra_server_args: ""
 
+k3s_kubectl_binary: k3s kubectl
+
 group_name_master: master
 
 kube_vip_arp: true

roles/k3s_server/tasks/main.yml

@@ -44,7 +44,7 @@
   block:
     - name: Verify that all nodes actually joined (check k3s-init.service if this fails)
       ansible.builtin.command:
-        cmd: k3s kubectl get nodes -l "node-role.kubernetes.io/master=true" -o=jsonpath="{.items[*].metadata.name}"
+        cmd: "{{ k3s_kubectl_binary | default('k3s kubectl') }} get nodes -l 'node-role.kubernetes.io/master=true' -o=jsonpath='{.items[*].metadata.name}'" # yamllint disable-line rule:line-length
       register: nodes
       until: nodes.rc == 0 and (nodes.stdout.split() | length) == (groups[group_name_master | default('master')] | length) # yamllint disable-line rule:line-length
       retries: "{{ retry_count | default(20) }}"
@@ -124,7 +124,7 @@
 
 - name: Configure kubectl cluster to {{ endpoint_url }}
   ansible.builtin.command: >-
-    k3s kubectl config set-cluster default
+    {{ k3s_kubectl_binary | default('k3s kubectl') }} config set-cluster default
       --server={{ endpoint_url }}
       --kubeconfig {{ ansible_user_dir }}/.kube/config
   changed_when: true