support 'k3s server --data-dir' to put k3s server files in a non-standard location

Signed-off-by: clambin <christophe.lambin@gmail.com>

roles/k3s/master/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+k3s_server_location: /var/lib/rancher/k3s

roles/k3s/master/tasks/main.yml

@@ -18,21 +18,21 @@
 
 - name: Wait for node-token
   wait_for:
-    path: /var/lib/rancher/k3s/server/node-token
+    path: "{{ k3s_server_location }}/server/node-token"
 
 - name: Register node-token file access mode
   stat:
-    path: /var/lib/rancher/k3s/server
+    path: "{{ k3s_server_location }}/server/node-token"
   register: p
 
 - name: Change file access node-token
   file:
-    path: /var/lib/rancher/k3s/server
+    path: "{{ k3s_server_location }}/server/node-token"
     mode: "g+rx,o+rx"
 
 - name: Read node-token from master
   slurp:
-    src: /var/lib/rancher/k3s/server/node-token
+    path: "{{ k3s_server_location }}/server/node-token"
   register: node_token
 
 - name: Store Master node-token
@@ -41,7 +41,7 @@
 
 - name: Restore node-token file access
   file:
-    path: /var/lib/rancher/k3s/server
+    path: "{{ k3s_server_location }}/server/node-token"
     mode: "{{ p.stat.mode }}"
 
 - name: Create directory .kube

roles/k3s/master/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 server {{ extra_server_args | default("") }}
+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