Documentation/add aks tutorial

docs/Manual/Tutorials/Kubernetes/AKS.md

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+# Run AranngoDB cluster on Azure Kubernetes Service (AKS)
+
+## Requirements
+
+* [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) (**version >= 1.10**)
+* [helm](https://www.helm.sh/)
+* [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-apt?view=azure-cli-latest)
+
+## Deploy cluster
+* In Azure dashboard choose **Create a resource**
+* Choose **Kubernetes Service**
+
+## Cluster basics (version >=1.10)
+![basics](./aks-create-basics.png)
+
+## Cluster authentication (Enable RBAC)
+![basics](./aks-create-auth.png)
+
+## Wait for cluster to be created
+![basics](./aks-create-valid.png)
+
+## Move to control using `kubectl`
+
+* Login to Azure using CLI
+```
+  $ az login
+    [
+      {
+        "cloudName": "AzureCloud",
+        "id": "...",
+        "isDefault": true,
+        "name": "ArangoDB-INC",
+        "state": "Enabled",
+        "tenantId": "...",
+        "user": {
+          "name": "[email protected]",
+          "type": "user"
+        }
+      }
+    ]
+```
+
+* Get AKS credentials to merge with local config, using resource group and cluster names used for above deployment
+```
+  $ az aks get-credentials --resource-group clifton --name ArangoDB
+```
+
+* Verify successful merge
+```
+  $ kubectl get svc
+    NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
+    kubernetes   ClusterIP   10.0.0.1     <none>        443/TCP   38m
+```
+
+* Initialise `helm`
+```
+  $ kubectl create serviceaccount --namespace kube-system tiller
+    serviceaccount/tiller created
+```
+```
+  $ kubectl create clusterrolebinding tiller-cluster-rule \
+        --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
+    clusterrolebinding.rbac.authorization.k8s.io/tiller-cluster-rule created
+```
+```    
+  $ helm init --service-account tiller
+    $HELM_HOME has been configured at /home/kaveh/.helm.
+    ...
+    Happy Helming!
+
+    Tiller (the Helm server-side component) has been
+    installed into your Kubernetes Cluster.
+```
+
+* Deploy ArabgoDB operator
+```
+  $ helm install \
+      github.com/arangodb/kube-arangodb/releases/download/X.X.X/kube-arangodb.tgz
+    NAME:   orderly-hydra
+    LAST DEPLOYED: Wed Oct 31 15:11:37 2018
+    NAMESPACE: default
+    STATUS: DEPLOYED
+    ...
+    See https://docs.arangodb.com/devel/Manual/Tutorials/Kubernetes/
+    for how to get started.
+```
+
+* Deploy ArangoDB cluster
+```
+  $ kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/master/examples/simple-cluster.yaml
+```