New playbooks for k8s service and examples

- kubedns moved to playbooks dir
- new ansible playbooks added for kubedash and kube-dashboard
- examples for k8s deployments and services added

Vagrantfile

@@ -92,7 +92,7 @@ Vagrant.configure("2") do |config|
       if master
         config.vm.provision "deploy-k8s", type: "file", source: "deploy-k8s.kargo.sh", destination: "~/deploy-k8s.kargo.sh"
         config.vm.provision "custom.yaml", type: "file", source: "custom.yaml", destination: "~/custom.yaml"
-        config.vm.provision "kubedns.yaml", type: "file", source: "kubedns.yaml", destination: "~/kubedns.yaml"
+        config.vm.provision "playbooks", type: "file", source: "playbooks", destination: "~/playbooks"
         config.vm.provision "nodes", type: "file", source: "nodes", destination: "~/nodes"
         config.vm.provision "bootstrap", type: "shell", path: "bootstrap-master.sh"
       else

bootstrap-master.sh

@@ -16,7 +16,7 @@ sudo sh -c 'cd /root/kargo-cli && python setup.py install'
 # k8s deploy script and configs
 sudo sh -c 'cp -a ~vagrant/deploy-k8s.kargo.sh /root/ && chmod 755 /root/deploy-k8s.kargo.sh'
 sudo cp -a ~vagrant/custom.yaml /root/custom.yaml
-sudo cp -a ~vagrant/kubedns.yaml /root/kubedns.yaml
+sudo cp -a ~vagrant/playbooks /root/playbooks
 
 # SSH keys and config
 sudo rm -rf /root/.ssh

deploy-k8s.kargo.sh

@@ -22,5 +22,5 @@ deploy_res=$?
 
 if [ "$deploy_res" -eq "0" ]; then
   echo "Setting up kubedns..."
-  ansible-playbook -i $INVENTORY kubedns.yaml
+  ansible-playbook -i $INVENTORY playbooks/kubedns.yaml
 fi

examples/kubernetes/external-nginx/README.md

@@ -0,0 +1,18 @@
+Nginx example with external IPs
+===============================
+
+* Edit `nginx-frontend.yaml` and update `externalIPs` to the list of external IPs of your k8s minions
+
+* Deploy:
+
+```bash
+kubectl create -f nginx-backends.yaml
+kubectl create -f nginx-frontend.yaml
+```
+
+* Check:
+
+```bash
+curl $ANY_MINION_EXTERNAL_IP
+```
+

examples/kubernetes/external-nginx/nginx-backends.yaml

@@ -0,0 +1,24 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: nginx-backend
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: nginx-backend
+        tier: backend
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+        env:
+        - name: GET_HOSTS_FROM
+          value: dns
+        ports:
+        - containerPort: 80

examples/kubernetes/external-nginx/nginx-frontend.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx-frontend
+  labels:
+    app: nginx-frontend
+    tier: frontend
+spec:
+  externalIPs:
+  - 10.210.0.12
+  - 10.210.0.13
+  - 10.210.0.14
+  - 10.210.0.15
+  - 10.210.0.16
+  - 10.210.0.17
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 80
+  selector:
+    app: nginx-backend

playbooks/kubedash.yaml

@@ -0,0 +1,5 @@
+- hosts: kube-master
+  tasks:
+    - name: setup-kubedns
+      shell: kpm deploy kube-system/kubedash --namespace=kube-system
+      run_once: true

playbooks/kubedashboard.yaml

@@ -0,0 +1,5 @@
+- hosts: kube-master
+  tasks:
+    - name: setup-kubedns
+      shell: kpm deploy kube-system/kubernetes-dashboard --namespace=kube-system
+      run_once: true