From c2d634aaba07caa564056693bc5454f1582426ea Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sat, 20 Jun 2020 17:23:44 +0200
Subject: kubeguard: add kube-router variant

---
 .../kubeadm/master/tasks/net_kubeguard.yml         |  14 +-
 .../net_kubeguard/kube-router.0.4.0.yml.j2         | 171 +++++++++++++++++++++
 2 files changed, 183 insertions(+), 2 deletions(-)
 create mode 100644 roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2

(limited to 'roles/kubernetes/kubeadm/master')

diff --git a/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml
index 95fee7c8..f364fb5f 100644
--- a/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml
+++ b/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml
@@ -1,3 +1,13 @@
 ---
-### kubeguard needs to be deployed before the cluster has been initialized.
-### there is nothing more todo here.
+- name: install kube-router variant
+  when: "kubernetes_network_plugin_variant == 'with-kube-router'"
+  block:
+  - name: generate kubeguard (kube-router) configuration
+    template:
+      src: "net_kubeguard/kube-router.{{ kubernetes_network_plugin_version }}.yml.j2"
+      dest: /etc/kubernetes/network-plugin.yml
+
+  - name: install kubeguard (kube-router) on to the cluster
+    command: kubectl --kubeconfig /etc/kubernetes/admin.conf apply -f /etc/kubernetes/network-plugin.yml
+    register: kubeguard_apply_result
+    changed_when: (kubeguard_apply_result.stdout_lines | reject("regex", " unchanged$") | list | length) > 0
diff --git a/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2 b/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2
new file mode 100644
index 00000000..51bfdaae
--- /dev/null
+++ b/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2
@@ -0,0 +1,171 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: kube-router-kubeconfig
+  namespace: kube-system
+  labels:
+    tier: node
+    k8s-app: kube-router
+data:
+  kubeconfig.conf: |
+    apiVersion: v1
+    kind: Config
+    clusters:
+    - cluster:
+        certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+        server: https://127.0.0.1:{{ kubernetes_api_lb_port | default('6443') }}
+      name: default
+    contexts:
+    - context:
+        cluster: default
+        namespace: default
+        user: default
+      name: default
+    current-context: default
+    users:
+    - name: default
+      user:
+        tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+---
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  labels:
+    k8s-app: kube-router
+    tier: node
+  name: kube-router
+  namespace: kube-system
+spec:
+  selector:
+    matchLabels:
+      k8s-app: kube-router
+      tier: node
+  template:
+    metadata:
+      labels:
+        k8s-app: kube-router
+        tier: node
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "8080"
+    spec:
+      priorityClassName: system-node-critical
+      serviceAccountName: kube-router
+      serviceAccount: kube-router
+      containers:
+      - name: kube-router
+        image: docker.io/cloudnativelabs/kube-router:v{{ kubernetes_network_plugin_version }}
+        imagePullPolicy: Always
+        args:
+        - --run-router=false
+        - --run-firewall=true
+        - --run-service-proxy={{ kubernetes_network_plugin_replaces_kube_proxy | string | lower }}
+        - --kubeconfig=/var/lib/kube-router/kubeconfig
+        - --hairpin-mode
+        - --iptables-sync-period=10s
+        - --ipvs-sync-period=10s
+        env:
+        - name: NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 20244
+          initialDelaySeconds: 10
+          periodSeconds: 3
+        resources:
+          requests:
+            cpu: 250m
+            memory: 250Mi
+        securityContext:
+          privileged: true
+        volumeMounts:
+        - name: lib-modules
+          mountPath: /lib/modules
+          readOnly: true
+        - name: kubeconfig
+          mountPath: /var/lib/kube-router
+          readOnly: true
+        - name: xtables-lock
+          mountPath: /run/xtables.lock
+          readOnly: false
+      hostNetwork: true
+      tolerations:
+      - key: CriticalAddonsOnly
+        operator: Exists
+      - effect: NoSchedule
+        key: node-role.kubernetes.io/master
+        operator: Exists
+      - effect: NoSchedule
+        key: node.kubernetes.io/not-ready
+        operator: Exists
+      volumes:
+      - name: lib-modules
+        hostPath:
+          path: /lib/modules
+      - name: kubeconfig
+        configMap:
+          name: kube-router-kubeconfig
+          items:
+          - key: kubeconfig.conf
+            path: kubeconfig
+      - name: xtables-lock
+        hostPath:
+          path: /run/xtables.lock
+          type: FileOrCreate
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: kube-router
+  namespace: kube-system
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: kube-router
+  namespace: kube-system
+rules:
+  - apiGroups:
+    - ""
+    resources:
+      - namespaces
+      - pods
+      - services
+      - nodes
+      - endpoints
+    verbs:
+      - list
+      - get
+      - watch
+  - apiGroups:
+    - "networking.k8s.io"
+    resources:
+      - networkpolicies
+    verbs:
+      - list
+      - get
+      - watch
+  - apiGroups:
+    - extensions
+    resources:
+      - networkpolicies
+    verbs:
+      - get
+      - list
+      - watch
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: kube-router
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: kube-router
+subjects:
+- kind: ServiceAccount
+  name: kube-router
+  namespace: kube-system
-- 
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