Chapter 6. Migrating Data Grid clusters on Red Hat OpenShift

Data Grid 8 introduces Data Grid Operator that provides operational intelligence and reduces management complexity for deploying Data Grid on OpenShift. With Data Grid 8, Data Grid Operator handles most configuration for Data Grid clusters, including authentication, client keystores, external network access, and logging.

Data Grid 8.3 introduces a Helm chart for deploying Data Grid clusters on OpenShift. The Data Grid chart provides an alternative for scenarios where it is not possible to deploy clusters that the Data Grid Operator manages, or where you require manual configuration, deployment, and management of Data Grid clusters.

Creating Data Grid Services

Data Grid 7.3 introduced the Cache service and Data Grid service for creating Data Grid clusters on OpenShift.

To create these services in Data Grid 7.3, you import the service templates, if necessary, and then use template parameters and environment variables to configure the services.

Creating Cache service nodes in 7.3

$ oc new-app cache-service \
  -p APPLICATION_USER=${USERNAME} \
  -p APPLICATION_PASSWORD=${PASSWORD} \
  -p NUMBER_OF_INSTANCES=3 \
  -p REPLICATION_FACTOR=2

Creating Data Grid service nodes in 7.3

$ oc new-app datagrid-service \
  -p APPLICATION_USER=${USERNAME} \
  -p APPLICATION_PASSWORD=${PASSWORD} \
  -p NUMBER_OF_INSTANCES=3
  -e AB_PROMETHEUS_ENABLE=true

Creating services in Data Grid 8

apiVersion: infinispan.org/v1
kind: Infinispan
metadata:
  name: example-infinispan
spec:
  replicas: 2
  service:
    type: Cache 1

This topic describes details for migrating from Data Grid 8.1 to 8.2 with Data Grid Operator.

Prometheus ServiceMonitor

You no longer need to create a ServiceMonitor for Prometheus to scrape Data Grid metrics. Enable monitoring for user-defined projects on OpenShift Container Platform and Data Grid Operator automatically detects when the Prometheus Operator is installed then creates a ServiceMonitor.

There are no migration requirements for Data Grid 8.3 deployments with Data Grid Operator.

There are no migration requirements for Data Grid 8.4 deployments with Data Grid Operator or Data Grid Helm chart.

Data Grid 8.3.1 has been removed from Data Grid Operator and therefore you will need to upgrade your server version before you upgrade the Data Grid Operator.