some changes

inventories/group_vars/k3s_cluster.yml

@@ -1,5 +1,6 @@
 ---
-k3s_version: v1.17.5+k3s1
+#k3s_version: v1.17.5+k3s1
+k3s_version: v1.21.4+k3s1
 ansible_user: pi
 systemd_dir: /etc/systemd/system
 master_ip: "{{ hostvars[groups['k3s_master'][0]]['ansible_host'] | default(groups['k3s_master'][0]) }}"

playbooks/k3s_site.yml

@@ -4,16 +4,16 @@
   gather_facts: yes
   become: yes
   roles:
-    - role: prereq
-    - role: download
-    - role: raspberrypi
+    - role: k3s_prereq
+    - role: k3s_download
+    - role: k3s_raspberrypi
 
-- hosts: master
+- hosts: k3s_master
   become: yes
   roles:
     - role: k3s/master
 
-- hosts: node
+- hosts: k3s_nodes
   become: yes
   roles:
     - role: k3s/node

roles/k3s/node/templates/k3s.service.j2

@@ -7,7 +7,7 @@ After=network-online.target
 Type=notify
 ExecStartPre=-/sbin/modprobe br_netfilter
 ExecStartPre=-/sbin/modprobe overlay
-ExecStart=/usr/local/bin/k3s agent --server https://{{ master_ip }}:6443 --token {{ hostvars[groups['master'][0]]['token'] }} {{ extra_agent_args | default("") }}
+ExecStart=/usr/local/bin/k3s agent --server https://{{ master_ip }}:6443 --token {{ hostvars[groups['k3s_master'][0]]['token'] }} {{ extra_agent_args | default("") }}
 KillMode=process
 Delegate=yes
 # Having non-zero Limit*s causes performance problems due to accounting overhead

roles/k3s_raspberrypi/tasks/prereq/Raspbian.yml

@@ -17,9 +17,11 @@
     path: /usr/sbin/iptables-legacy
     name: iptables
   register: ip4_legacy
+  when: ansible_distribution_major_version|int > 9
 
 - name: Changing to ip6tables-legacy
   alternatives:
     path: /usr/sbin/ip6tables-legacy
     name: ip6tables
   register: ip6_legacy
+  when: ansible_distribution_major_version|int > 9