Scaling and Upgrading Hazelcast Clusters in Kubernetes
Scale up or down your Hazelcast cluster and upgrade all members, using rolling upgrades.
Scaling a Cluster
To scale a Hazelcast cluster in Kubernetes, use the standard kubectl scale command to change the cluster size.
Upgrading a Cluster
To upgrade your cluster to a new version of Hazelcast, update the Hazelcast version in your Deployment or StatefulSet configuration, then use the standard kubectl scale command.
To upgrade a running cluster, you must have rolling upgrades enabled.
By default, Hazelcast does not shutdown gracefully. As a result, if you suddenly terminate more members than your configured backup-count property (1 by default), you may lose cluster data. To prevent data loss during an upgrade, see Preventing Data Loss During Upgrades
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