Add support for PodSecurityPolicies

roles/kubernetes/master/defaults/main.yml

@@ -44,6 +44,8 @@ kube_apiserver_admission_control:
   - DefaultStorageClass
   - ResourceQuota
 
+psp_enabled: '{{ "PodSecurityPolicy" in kube_apiserver_admission_control }}'
+
 ## Enable/Disable Kube API Server Authentication Methods
 kube_basic_auth: true
 kube_token_auth: true

roles/kubernetes/master/tasks/main.yml

@@ -60,6 +60,31 @@
   when: kubesystem|failed and inventory_hostname == groups['kube-master'][0]
   tags: apps
 
+- name: Lay Down kubelet PSP Resources (RBAC)
+  template:
+    src: "{{item.file}}"
+    dest: "{{kube_config_dir}}/{{item.file}}"
+  with_items:
+    - {name: kubelet-psp, file: kubelet-psp.yaml, type: psp}
+    - {name: kubelet-psp, file: kubelet-psp-clusterrole.yaml, type: clusterrole}
+    - {name: kubelet-psp, file: kubelet-psp-clusterrolebinding.yaml, type: clusterrolebinding}
+  register: manifests
+  when: dns_mode != 'none' and inventory_hostname == groups['kube-master'][0] and rbac_enabled and psp_enabled
+  tags: apps
+
+- name: Apply kubelet PSP Resources (RBAC)
+  kube:
+    name: "{{item.item.name}}"
+    namespace: "{{ system_namespace }}"
+    kubectl: "{{bin_dir}}/kubectl"
+    resource: "{{item.item.type}}"
+    filename: "{{kube_config_dir}}/{{item.item.file}}"
+    state: "{{item.changed | ternary('latest','present') }}"
+  with_items: "{{ manifests.results }}"
+  failed_when: manifests|failed and "Error from server (AlreadyExists)" not in manifests.msg
+  when: dns_mode != 'none' and inventory_hostname == groups['kube-master'][0] and rbac_enabled and psp_enabled
+  tags: apps
+
 - name: Write kube-scheduler kubeconfig
   template:
     src: kube-scheduler-kubeconfig.yaml.j2

roles/kubernetes/master/templates/kubelet-psp-clusterrole.yaml

@@ -0,0 +1,13 @@
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: kubelet-psp
+rules:
+- apiGroups:
+  - extensions
+  resources:
+  - podsecuritypolicies
+  resourceNames:
+  - kubelet-psp
+  verbs:
+  - use

roles/kubernetes/master/templates/kubelet-psp-clusterrolebinding.yaml

@@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+    name: kubelet-psp
+subjects:
+- kind: Group
+  apiGroup: rbac.authorization.k8s.io
+  name: system:nodes
+roleRef:
+   apiGroup: rbac.authorization.k8s.io
+   kind: ClusterRole
+   name: kubelet-psp

roles/kubernetes/master/templates/kubelet-psp.yaml

@@ -0,0 +1,23 @@
+apiVersion: extensions/v1beta1
+kind: PodSecurityPolicy
+metadata:
+  name: kubelet-psp
+spec:
+  hostNetwork: true
+  privileged: true
+  hostPID: true
+  hostIPC: true
+  hostPorts:
+  - min: 1
+    max: 65534
+  fsGroup:
+    rule: RunAsAny
+  privileged: true
+  runAsUser:
+    rule: RunAsAny
+  seLinux:
+    rule: RunAsAny
+  supplementalGroups:
+    rule: RunAsAny
+  volumes:
+  - '*'