fix(uninstall): deprecated drain flag removed in 1.22

fixes #159

tasks/teardown/drain-and-remove-nodes.yml

@@ -24,7 +24,7 @@
         cmd: >-
           {{ k3s_install_dir }}/kubectl drain {{ item }}
             --ignore-daemonsets
-            --delete-local-data
+            --{{ k3s_drain_command[ansible_version.string is version_compare('1.22', '>=')] }}
             --force
       delegate_to: "{{ k3s_control_delegate }}"
       run_once: true

vars/main.yml

@@ -159,3 +159,8 @@ k3s_cgroup_subsys:
     documentation: |
       If you are running Alpine Linux, see:
       https://rancher.com/docs/k3s/latest/en/advanced/#additional-preparation-for-alpine-linux-setup
+
+# Drain command
+k3s_drain_command:
+  true: delete-emptydir-data
+  false: delete-local-data