Revert "Drop linux capabilities and rework users/groups"

roles/adduser/defaults/main.yml

@@ -1,40 +1,24 @@
 ---
 addusers:
   etcd:
-    name: "{{ etcd_user }}"
+    name: etcd
     comment: "Etcd user"
-    createhome: >-
-      {% if ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] %}no{% else %}yes{% endif %}
+    createhome: yes
     home: "/var/lib/etcd"
     system: yes
-    shell: /usr/sbin/nologin
-    group: "{{ etcd_group }}"
-    groups: "{{ etcd_cert_group }}"
-    type: >-
-      {% if ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] %}cloud-init{% endif %}
+    shell: /bin/nologin
   kube:
-    name: "{{ kubelet_user }}"
+    name: kube
     comment: "Kubernetes user"
-    shell: /usr/sbin/nologin
+    shell: /sbin/nologin
     system: yes
-    group: "{{ kubelet_group }}"
-    groups: "{{ etcd_cert_group }},{{ kube_cert_group }}"
+    group: "{{ kube_cert_group }}"
     createhome: no
-  netplug:
-    name: "{{ netplug_user }}"
-    comment: "Network plugin user"
-    createhome: no
-    system: yes
-    shell: /usr/sbin/nologin
-    group: "{{ netplug_group }}"
-    groups: "{{ etcd_cert_group }}"
 
 adduser:
   name: "{{ user.name }}"
   group: "{{ user.name|default(None) }}"
-  groups: "{{ user.groups|default(None) }}"
   comment: "{{ user.comment|default(None) }}"
   shell: "{{ user.shell|default(None) }}"
   system: "{{ user.system|default(None) }}"
   createhome: "{{ user.createhome|default(None) }}"
-  type: "{{ user.type|default(None) }}"