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Stardog Helm Chart

This chart installs Stardog Cluster and a ZooKeeper ensemble, which is required for the cluster. The chart pulls the latest version of Stardog from Docker Hub and does not support rolling upgrades.

Chart Details

This chart does the following:

  • Creates a ZooKeeper ensemble from the incubated ZooKeeper Helm chart
  • Creates a Stardog Cluster StatefulSet configured with readiness and liveness probes
  • Creates a load balanced service for Stardog Cluster
  • Optionally specify the anti-affinity for the pods
  • Optionally tune resource requests and limits for the pods
  • Optionally tune JVM resources for Stardog

Configuration Parameters

Parameter Description
replicaCount The number of replicas in Stardog Cluster
admin.password Stardog admin password
javaArgs Java args for Stardog server
image.registry The Docker registry containing the Stardog image
image.repository The Docker image repostory containing the Stardog image
image.tag The Docker image tag for Stardog
image.username The Docker registry username
image.password The Docker registry password
persistence.storageClass The storage class to use for Stardog home volumes
persistence.size The size of volume for Stardog home
ports.server The port to expose Stardog server
ports.sql The port to expose Stardog BI server
tmpDir The directory to use for Stardog tmp space

The default values are specified in values.yaml as well as the required values for the ZooKeeper chart.

Upgrades

Stardog Cluster does not currently support rolling upgrades. To upgrade Stardog on k8s, make sure there are no running transactions and then delete the Stardog pods and redeploy them with the new Stardog version. If there are manual steps required as part of the upgrade process k8s jobs will need to be used to run the steps on the Stardog home directories in the PVCs.

See the Stardog documentation for instructuions on how to upgrade Stardog Cluster.

Limitations

The chart does not currently support:

  • cache targets
  • rolling upgrades
  • pinning chart version to Stardog versions, the chart tracks the latest available Stardog, it's not guaranteed to work with any Stardog version