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Scylla & JanusGraph Deployment Examples

Short code examples to pair with the article Powering a Graph Data System with Scylla + JanusGraph. See the article for the full walkthrough!

The 3 components of our graph data system are:

  • Scylla - our storage backend, the ultimate place where our data gets stored
  • Elasticsearch - our index backend, speeding up some searches, and delivering powerful range and fuzzy-match capabilities
  • JanusGraph - provides our graph itself, either as a server or embedded in a standalone application

Scylla

Use Scylla's GCE deployment script to deploy Scylla on a 3 node cluster.

scylla-code-samples/gce_deploy_and_install_scylla_cluster/gce_deploy_and_install_scylla_cluster.sh \
  -p symphony-graph17038 \
  -z us-west1-b \
  -t n1-standard-16 \
  -n -c2 \
  -v3.0

Everything else can be handled from the code in this repository.

GKE Cluster

scripts/setup/setup_gke.sh -p MY-PROJECT

Deploy Elasticsearch

kubectl apply -f k8s/elasticsearch/es-storage.yaml
kubectl apply -f k8s/elasticsearch/es-service.yaml
kubectl apply -f k8s/elasticsearch/es-statefulset.yaml

Build and Deploy a JanusGraph image to Google Container Registry

You'll need this for your JanusGraph Gremlin Console & JanusGraph Server pods.

scripts/setup/build_and_deploy_janusgraph_image.sh -p MY-PROJECT

Launch Gremlin Console

This uses environment variables in the YAML file to help setup a JanusGraph configuration file. Make sure you update the GCP Project and Scylla Hostname in k8s/gremlin-console/janusgraph-gremlin-console.yaml.

kubectl create -f k8s/gremlin-console/janusgraph-gremlin-console.yaml
kubectl exec -it janusgraph-gremlin-console -- bin/gremlin.sh

         \,,,/
         (o o)
-----oOOo-(3)-oOOo-----
...
gremlin> graph = JanusGraphFactory.open('/etc/opt/janusgraph/janusgraph.properties')
...
// And you're off!

Launch Gremlin Server

This uses environment variables in the YAML file to help setup a JanusGraph configuration file. Make sure you update the GCP Project and Scylla Hostname in k8s/janusgraph/janusgraph-server.yaml.

kubectl apply -f k8s/janusgraph/janusgraph-server-service.yaml
kubectl apply -f k8s/janusgraph/janusgraph-server.yaml

You can now connect to JanusGraph Server over the janusgraph-service-lb load balancer IP.



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