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You can install a single server Dgraph cluster in Kubernetes.

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Before you begin

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Installing a single server Dgraph cluster

  1. Verify that you are able to access the nodes in the Kubernetes cluster: 
    kubectl get nodes
    An output similar to this appears: 
    NAME                                          STATUS   ROLES    AGE   VERSION
<aws-ip-hostname>.<region>.compute.internal   Ready    <none>   1m   v1.15.11-eks-af3caf
<aws-ip-hostname>.<region>.compute.internal   Ready    <none>   1m   v1.15.11-eks-af3caf
    After your Kubernetes cluster is up, you can use dgraph-single.yaml to start a Zero, Alpha, and Ratel UI services.
  2. Start a StatefulSet that creates a single Pod with Zero, Alpha, and Ratel UI: 
    kubectl create --filename https://raw.githubusercontent.com/hypermodeinc/dgraph/master/contrib/config/kubernetes/dgraph-single/dgraph-single.yaml
    An output similar to this appears: 
    service/dgraph-public created
statefulset.apps/dgraph created
  3. Confirm that the Pod was created successfully. 
    kubectl get pods
    An output similar to this appears: 
    NAME       READY     STATUS    RESTARTS   AGE
dgraph-0   3/3       Running   0          1m
  4. List the containers running in the Pod dgraph-0: 
    kubectl get pods dgraph-0 -o jsonpath='{range .spec.containers[*]}{.name}{"\n"}{end}'
    An output similar to this appears: 
    ratel
zero
alpha
    You can check the logs for the containers in the pod using kubectl logs --follow dgraph-0 <CONTAINER_NAME>.
  5. Port forward from your local machine to the Pod: 
    kubectl port-forward pod/dgraph-0 8080:8080
kubectl port-forward pod/dgraph-0 8000:8000
  6. Go to http://localhost:8000 to access Dgraph using the Ratel UI.

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Deleting Dgraph single server resources

Delete all the resources using: 
kubectl delete --filename https://raw.githubusercontent.com/hypermodeinc/dgraph/master/contrib/config/kubernetes/dgraph-single/dgraph-single.yaml
kubectl delete persistentvolumeclaims --selector app=dgraph