add possibility to disable fail with swap (#1773)

roles/kubernetes/node/defaults/main.yml

@@ -25,6 +25,9 @@ kubelet_enforce_node_allocatable: "\"\""
 # Note that PID namespace sharing requires docker >= 1.13.1.
 kubelet_disable_shared_pid: true
 
+### fail with swap on (default true)
+kubelet_fail_swap_on: true
+
 # Reserve this space for system resources
 kubelet_memory_limit: 256M
 kubelet_cpu_limit: 100m

roles/kubernetes/node/templates/kubelet.kubeadm.env.j2

@@ -28,6 +28,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 --node-status-update-frequency={{ kubelet_status_update_frequency }} \
 --cgroup-driver={{ kubelet_cgroup_driver|default(kubelet_cgroup_driver_detected) }} \
 --docker-disable-shared-pid={{ kubelet_disable_shared_pid }} \
+--fail-swap-on={{ kubelet_fail_swap_on|default(true)}} \
 {% endset %}
 
 {# Node reserved CPU/memory #}

roles/kubernetes/node/templates/kubelet.standard.env.j2

@@ -21,6 +21,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 {% endif %}
 --cgroup-driver={{ kubelet_cgroup_driver|default(kubelet_cgroup_driver_detected) }} \
 --cgroups-per-qos={{ kubelet_cgroups_per_qos }} \
+--fail-swap-on={{ kubelet_fail_swap_on|default(true)}} \
 --enforce-node-allocatable={{ kubelet_enforce_node_allocatable }} {% endif %}{% endset %}
 
 {# DNS settings for kubelet #}