Cassandra Operator

Description

Apache Cassandra is an open source NoSQL distributed database providing scalability, high availability and fault-tolerance on commodity hardware.

This Cassandra operator is designed to integrate Cassandra in the Juju .[charm ecosystem].

Usage

$ juju deploy cassandra-k8s

Scale out and down

Changing the amount of units of Cassandra is done by executing:

$ juju scale-application cassandra-k8s <new_unit_count>

You should scale the Cassandra cluster gradually, not adding or removing units too fast. The rebalancing of the cluster is I/O intensive, with potentially large amounts of data moving between nodes, and that can measurably affect performance.

Relations

This operator provides the following relation interfaces:

• cassandra provides access to the Cassandra cluster over the Cassandra Query Language (CQL).

The following relation interfaces are consumed:

• prometheus_scrape enables the monitoring of the Cassandra cluster by the Prometheus Operator charm.

OCI Images

This charm by default uses the latest version of the cassandra image on Docker Hub.