Remove kubelet_node_{custom_flags,config_extra_args}

There is no need to have an extra variables for this, just use different
values per host (using Ansible group_vars, for example)

docs/ansible/vars.md

@@ -296,8 +296,8 @@ node_taints:
 
 For all kube components, custom flags can be passed in. This allows for edge cases where users need changes to the default deployment that may not be applicable to all deployments.
 
-Extra flags for the kubelet can be specified using these variables,
+Extra flags for the kubelet can be specified using these variables, in the form of dicts of key-value pairs of
-in the form of dicts of key-value pairs of configuration parameters that will be inserted into the kubelet YAML config file. The `kubelet_node_config_extra_args` apply kubelet settings only to nodes and not control planes. Example:
+configuration parameters that will be inserted into the kubelet YAML config file. Example:
 
 ```yml
 kubelet_config_extra_args:
@@ -312,14 +312,10 @@ kubelet_config_extra_args:
 The possible vars are:
 
 * *kubelet_config_extra_args*
-* *kubelet_node_config_extra_args*
 
 Previously, the same parameters could be passed as flags to kubelet binary with the following vars:
 
 * *kubelet_custom_flags*
-* *kubelet_node_custom_flags*
-
-The `kubelet_node_custom_flags` apply kubelet settings only to nodes and not control planes. Example:
 
 ```yml
 kubelet_custom_flags:

roles/kubernetes/node/defaults/main.yml

@@ -125,9 +125,6 @@ kubelet_config_extra_args_cgroupfs:
   systemCgroups: /system.slice
   cgroupRoot: /
 
-## Support parameters to be passed to kubelet via kubelet-config.yaml only on nodes, not control plane nodes
-kubelet_node_config_extra_args: {}
-
 # Maximum number of container log files that can be present for a container.
 kubelet_logfiles_max_nr: 5
 
@@ -137,9 +134,6 @@ kubelet_logfiles_max_size: 10Mi
 ## Support custom flags to be passed to kubelet
 kubelet_custom_flags: []
 
-## Support custom flags to be passed to kubelet only on nodes, not control plane nodes
-kubelet_node_custom_flags: []
-
 # If non-empty, will use this string as identification instead of the actual hostname
 kube_override_hostname: >-
   {%- if cloud_provider is defined and cloud_provider in ['aws'] -%}

roles/kubernetes/node/templates/kubelet-config.v1beta1.yaml.j2

@@ -77,9 +77,6 @@ resolvConf: "{{ kube_resolv_conf }}"
 {% if kubelet_config_extra_args %}
 {{ kubelet_config_extra_args | to_nice_yaml(indent=2) }}
 {% endif %}
-{% if inventory_hostname in groups['kube_node'] and kubelet_node_config_extra_args %}
-{{ kubelet_node_config_extra_args | to_nice_yaml(indent=2) }}
-{% endif %}
 {% if kubelet_feature_gates or kube_feature_gates %}
 featureGates:
 {% for feature in (kubelet_feature_gates | default(kube_feature_gates, true)) %}

roles/kubernetes/node/templates/kubelet.env.v1beta1.j2

@@ -15,7 +15,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
 --runtime-cgroups={{ kubelet_runtime_cgroups }} \
 {% endset %}
 
-KUBELET_ARGS="{{ kubelet_args_base }} {% if kubelet_custom_flags is string %} {{kubelet_custom_flags}} {% else %}{% for flag in kubelet_custom_flags %} {{flag}} {% endfor %}{% endif %}{% if inventory_hostname in groups['kube_node'] %}{% if kubelet_node_custom_flags is string %} {{kubelet_node_custom_flags}} {% else %}{% for flag in kubelet_node_custom_flags %} {{flag}} {% endfor %}{% endif %}{% endif %}"
+KUBELET_ARGS="{{ kubelet_args_base }} {{ kubelet_custom_flags | join(' ') }}"
 {% if kubelet_flexvolumes_plugins_dir is defined %}
 KUBELET_VOLUME_PLUGIN="--volume-plugin-dir={{ kubelet_flexvolumes_plugins_dir }}"
 {% endif %}