add files

roles/k3s/defaults/main.yml

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+---
+k3s_server_location: /var/lib/rancher/k3s

roles/k3s/tasks/main.yml

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+---
+
+- name: Enable IPv4 forwarding
+  sysctl:
+    name: net.ipv4.ip_forward
+    value: "1"
+    state: present
+    reload: true
+
+- name: Download k3s binary
+  get_url:
+    url: https://github.com/k3s-io/k3s/releases/download/{{ k3s_version }}/k3s
+    checksum: sha256:https://github.com/k3s-io/k3s/releases/download/{{ k3s_version }}/sha256sum-amd64.txt
+    dest: /usr/local/bin/k3s
+    owner: root
+    group: root
+    mode: 755
+
+- name: Copy SystemD service
+  template:
+    src: k3s.service.j2
+    dest: /usr/lib/systemd/system/k3s.service
+    owner: root
+    mode: 644
+
+- name: Enable k3s service
+  systemd:
+    name: k3s
+    daemon_reload: true
+    state: restarted
+    enabled: true
+
+- name: Create kubectl symlink
+  file:
+    src: /usr/local/bin/k3s
+    dest: /usr/local/bin/kubectl
+    state: link
+
+- name: Create directory .kube
+  file:
+    path: ~{{ ansible_user }}/.kube
+    state: directory
+    owner: "{{ ansible_user }}"
+    mode: "750"
+
+- name: Copy config file to user home directory
+  copy:
+    src: /etc/rancher/k3s/k3s.yaml
+    dest: ~{{ ansible_user }}/.kube/config
+    remote_src: true
+    owner: "{{ ansible_user }}"
+    mode: "600"

roles/k3s/templates/k3s.service.j2

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+[Unit]
+Description=Lightweight Kubernetes
+Documentation=https://k3s.io
+After=network-online.target
+
+[Service]
+Type=notify
+ExecStartPre=-/sbin/modprobe br_netfilter
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart=/usr/local/bin/k3s server --data-dir {{ k3s_server_location }} {{ extra_server_args | default("") }}
+KillMode=process
+Delegate=yes
+# Having non-zero Limit*s causes performance problems due to accounting overhead
+# in the kernel. We recommend using cgroups to do container-local accounting.
+LimitNOFILE=1048576
+LimitNPROC=infinity
+LimitCORE=infinity
+TasksMax=infinity
+TimeoutStartSec=0
+Restart=always
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target