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Clustering using JMS Plugin

GeoServer supports clustering using JMS cluster plugin or using the ActiveMQ-broker.

This setup uses the JMS cluster plugin which uses an embedded broker. A docker-compose.yml is provided in the clustering folder which simulates the replication using a shared data directory.

The environment variables associated with replication are listed below

  • CLUSTERING=True - Specified whether clustering should be activated.
  • BROKER_URL=tcp://0.0.0.0:61661 - This links to the internal broker provided by the JMS cluster plugin. This value will be different for (Master-Node)
  • READONLY=disabled - Determines if the GeoServer instance is Read only
  • RANDOMSTRING=87ee2a9b6802b6da_master - Used to create a unique CLUSTER_CONFIG_DIR for each instance. Not mandatory as the container can self generate this.
  • INSTANCE_STRING=d8a167a4e61b5415ec263 - Used to differentiate cluster instance names. Not mandatory as the container can self generate this.
  • CLUSTER_DURABILITY=false
  • TOGGLE_MASTER=true - Differentiates if the instance will be a Master
  • TOGGLE_SLAVE=true - Differentiates if the instance will be a Node
  • EMBEDDED_BROKER=disabled - Should be disabled for the Node
  • CLUSTER_CONNECTION_RETRY_COUNT=10 - How many times try to connect to broker
  • CLUSTER_CONNECTION_MAX_WAIT=500 - Wait time between connection to broker retry (in milliseconds)