Add many examples - helm, k8s module, kubectl connection plugin.

Author: geerlingguy

kubernetes/Vagrantfile

@@ -9,7 +9,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.provider "virtualbox"
 
   config.vm.provider :virtualbox do |v|
-    v.memory = 1024
+    v.memory = 1536
     v.cpus = 1
     v.linked_clone = true
   end

kubernetes/examples/files/.gitignore

@@ -0,0 +1 @@
+kubectl-config

kubernetes/examples/files/nginx.yml

@@ -0,0 +1,23 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: a4d-nginx
+  namespace: default
+  labels:
+    app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9
+        ports:
+        - containerPort: 80

kubernetes/examples/files/tiller-rbac.yml

@@ -0,0 +1,13 @@
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: tiller
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+  - kind: ServiceAccount
+    name: tiller
+    namespace: kube-system

kubernetes/examples/helm-cleanup.yml

@@ -0,0 +1,45 @@
+---
+- hosts: k8s-master
+  become: yes
+
+  tasks:
+    - name: Get Tiller's ClusterIP.
+      k8s:
+        api_version: v1
+        kind: Service
+        name: tiller-deploy
+        namespace: kube-system
+      register: tiller_service
+
+    - name: Set the Helm host and port.
+      set_fact:
+        helm_host: "{{ tiller_service.result.spec.clusterIP }}"
+        helm_port: "{{ tiller_service.result.spec.ports[0].port }}"
+
+    - name: Delete phpmyadmin using helm.
+      command: helm delete --purge phpmyadmin
+      environment:
+        HELM_HOST: '{{ helm_host }}:{{ helm_port }}'
+
+    - name: Reset Helm.
+      command: helm reset --force
+      environment:
+        HELM_HOST: '{{ helm_host }}:{{ helm_port }}'
+
+    - name: Remove Tiller RBAC definition.
+      k8s:
+        state: absent
+        definition: "{{ lookup('file', 'files/tiller-rbac.yml') | from_yaml }}"
+
+    - name: Remove Tiller namespace.
+      k8s:
+        state: present
+        api_version: v1
+        kind: ServiceAccount
+        name: tiller
+        namespace: kube-system
+
+    - name: Delete helm binary.
+      file:
+        path: /usr/local/bin/helm
+        state: absent

kubernetes/examples/helm.yml

@@ -0,0 +1,70 @@
+---
+- hosts: k8s-master
+  become: yes
+
+  tasks:
+    - name: Create Tiller namespace.
+      k8s:
+        state: present
+        definition:
+          apiVersion: v1
+          kind: ServiceAccount
+          metadata:
+            name: tiller
+            namespace: kube-system
+
+    - name: Apply Tiller RBAC definition.
+      k8s:
+        state: present
+        definition: "{{ lookup('file', 'files/tiller-rbac.yml') | from_yaml }}"
+
+    - name: Retrieve helm binary archive.
+      unarchive:
+        src: https://storage.googleapis.com/kubernetes-helm/helm-v2.10.0-linux-amd64.tar.gz
+        dest: /tmp
+        creates: /usr/local/bin/helm
+        remote_src: yes
+
+    - name: Move helm binary into place.
+      command: >
+        cp /tmp/linux-amd64/helm /usr/local/bin/helm
+        creates=/usr/local/bin/helm
+
+    - name: Set up Helm and Tiller.
+      command: helm init --service-account tiller
+      register: helm_init_result
+      changed_when: "'already installed' not in helm_init_result.stdout"
+
+    - name: Get Tiller's ClusterIP.
+      k8s:
+        api_version: v1
+        kind: Service
+        name: tiller-deploy
+        namespace: kube-system
+      register: tiller_service
+
+    - name: Set the Helm host and port.
+      set_fact:
+        helm_host: "{{ tiller_service.result.spec.clusterIP }}"
+        helm_port: "{{ tiller_service.result.spec.ports[0].port }}"
+
+    - name: Wait for Tiller to become responsive.
+      wait_for:
+        host: '{{ helm_host }}'
+        port: '{{ helm_port }}'
+        state: started
+
+    - name: List installed Helm charts.
+      command: helm list
+      environment:
+        HELM_HOST: '{{ helm_host }}:{{ helm_port }}'
+      register: helm_list_results
+      changed_when: False
+
+    - name: Install phpMyAdmin with Helm.
+      command: >
+        helm install --name phpmyadmin stable/phpmyadmin
+        --set service.type=NodePort
+      environment:
+        HELM_HOST: '{{ helm_host }}:{{ helm_port }}'
+      when: "'phpmyadmin' not in helm_list_results.stdout"

kubernetes/examples/k8s-module-cleanup.yml

@@ -0,0 +1,17 @@
+---
+- hosts: k8s-master
+  become: yes
+
+  tasks:
+    - name: Remove resources in Nginx Deployment definition.
+      k8s:
+        state: absent
+        definition: "{{ lookup('file', 'files/nginx.yml') | from_yaml }}"
+
+    - name: Remove the Nginx Service.
+      k8s:
+        state: absent
+        api_version: v1
+        kind: Service
+        namespace: default
+        name: a4d-nginx

kubernetes/examples/k8s-module.yml

@@ -0,0 +1,52 @@
+---
+- hosts: k8s-master
+  become: yes
+
+  pre_tasks:
+    - name: Ensure Pip is installed.
+      package:
+        name: python-pip
+        state: present
+
+    - name: Ensure OpenShift client is installed.
+      pip:
+        name: openshift
+        state: present
+
+  tasks:
+    - name: Apply Nginx definition from Ansible controller file system.
+      k8s:
+        state: present
+        definition: "{{ lookup('file', 'files/nginx.yml') | from_yaml }}"
+
+    - name: Expose the Nginx service with an inline Service definition.
+      k8s:
+        state: present
+        definition:
+          apiVersion: v1
+          kind: Service
+          metadata:
+            labels:
+              app: nginx
+            name: a4d-nginx
+            namespace: default
+          spec:
+            type: NodePort
+            ports:
+            - port: 80
+              protocol: TCP
+              targetPort: 80
+            selector:
+              app: nginx
+
+    - name: Get the details of the a4d-nginx Service.
+      k8s:
+        api_version: v1
+        kind: Service
+        name: a4d-nginx
+        namespace: default
+      register: a4d_nginx_service
+
+    - name: Print the NodePort of the a4d-nginx Service.
+      debug:
+        var: a4d_nginx_service.result.spec.ports[0].nodePort

kubernetes/examples/kubectl-connection.yml

@@ -0,0 +1,34 @@
+---
+# This playbook assumes you already have the kubectl binary installed
+# and available in the $PATH.
+- hosts: k8s-master
+  become: yes
+
+  tasks:
+    - name: Retrieve kubectl config file from the master server.
+      fetch:
+        src: /root/.kube/config
+        dest: files/kubectl-config
+        flat: yes
+
+    - name: Get the phpmyadmin Pod name.
+      command: >
+        kubectl --no-headers=true get pod -l app=phpmyadmin
+        -o custom-columns=:metadata.name
+      register: phpmyadmin_pod
+
+    - name: Add the phpmyadmin Pod to the inventory.
+      add_host:
+        name: '{{ phpmyadmin_pod.stdout }}'
+        kubectl_pod: '{{ phpmyadmin_pod.stdout }}'
+        kubectl_namespace: default
+        ansible_kubectl_config: files/kubectl-config
+        ansible_connection: kubectl
+
+    # Note: Python must be present in the container to use other modules.
+    - name: Run a command inside the container.
+      raw: date
+      register: date_output
+      delegate_to: '{{ phpmyadmin_pod.stdout }}'
+
+    - debug: var=date_output.stdout

kubernetes/inventory

@@ -1,8 +1,14 @@
-[k8s]
+[k8s-master]
 master ansible_host=192.168.84.2 kubernetes_role=master
+
+[k8s-nodes]
 node1 ansible_host=192.168.84.3 kubernetes_role=node
 node2 ansible_host=192.168.84.4 kubernetes_role=node
 
+[k8s:children]
+k8s-master
+k8s-nodes
+
 [k8s:vars]
 ansible_ssh_user=vagrant
-ansible_ssh_private_key_file=~/.vagrant.d/insecure_private_key
+ansible_ssh_private_key_file=~/.vagrant.d/insecure_private_key