Add kubernetes_join_command_extra_opts variable.

README.md

@@ -42,6 +42,10 @@ Extra args to pass to `kubelet` during startup. E.g. to allow `kubelet` to start
 
 Extra args to pass to `kubeadm init` during K8s control plane initialization. E.g. to specify extra Subject Alternative Names for API server certificate, set this to: `"--apiserver-cert-extra-sans my-custom.host"`
 
+    kubernetes_join_command_extra_opts: ""
+
+Extra args to pass to the generated `kubeadm join` command during K8s node initialization. E.g. to ignore certain preflight errors like swap being enabled, set this to: `--ignore-preflight-errors=Swap`
+
     kubernetes_allow_pods_on_master: true
 
 Whether to remove the taint that denies pods from being deployed to the Kubernetes master. If you have a single-node cluster, this should definitely be `True`. Otherwise, set to `False` if you want a dedicated Kubernetes master which doesn't run any other pods.

defaults/main.yml

@@ -16,6 +16,7 @@ kubernetes_role: master
 
 kubernetes_kubelet_extra_args: ""
 kubernetes_kubeadm_init_extra_opts: ""
+kubernetes_join_command_extra_opts: ""
 
 kubernetes_allow_pods_on_master: true
 kubernetes_enable_web_ui: true

tasks/main.yml

@@ -44,7 +44,9 @@
 
 - name: Set the kubeadm join command globally.
   set_fact:
-    kubernetes_join_command: "{{ kubernetes_join_command_result.stdout }}"
+    kubernetes_join_command: >
+      {{ kubernetes_join_command_result.stdout }}
+      {{ kubernetes_join_command_extra_opts }}
   when: kubernetes_join_command_result.stdout is defined
   delegate_to: "{{ item }}"
   delegate_facts: true