Using environment variables

Configure DSE by setting environment variables.

Configure the DataStax Enterprise (DSE) Docker image by setting environment variables when the container is created. Use the docker run command -e option.

Table 1. Environment variables
Variable	Setting	Description
`DS_LICENSE`	accept	Acknowledge agreement with the terms of the DataStax license. To show the license, set the variable `DS_LICENSE` to the value `accept`. Important: The image only starts if this variable is set to `accept`.
`LISTEN_ADDRESS`	IP_address	IP address to listen for connections from other nodes. Defaults to the container IP address.
`BROADCAST_ADDRESS`	IP_address	IP address to advertise to other nodes. Defaults to the same value as `LISTEN_ADDRESS`.
`RPC_ADDRESS`	IP_address	IP address to listen for client/driver connections. Default: `0.0.0.0`.
`BROADCAST_RPC_ADDRESS`	IP_address	IP address to advertise to clients/drivers. Defaults to the same value as `BROADCAST_ADDRESS`.
`SEEDS`	IP_address	Comma-delimited list of seed nodes for the cluster. Defaults to the node `BROADCAST_ADDRESS`.
`START_RPC`	true \| false	Determines whether to start the Thrift RPC server. If not set, the default value is preserved in the `cassandra.yaml` file.
`CLUSTER_NAME`	string	Name of the cluster. Default: `Test Cluster`.
`NUM_TOKENS`	int	Number of tokens randomly assigned to the node. Default: `8`.
`DC`	string	Datacenter name. Default: `Cassandra`.
`RACK`	string	Rack name. Default: `rack1`.
`OPSCENTER_IP`	IP_address \| string	Address of the OpsCenter instance to use for DSE management. The value can be specified by linking the OpsCenter container using `opscenter` as the name.
`JVM_EXTRA_OPTS`	string	Sets a custom value for the JVM heap using `-Xmx` and `-Xms`.
`LANG`	string	Sets a custom locale.
`SNITCH`	string	Sets the snitch implementation this node will use. The value is set in the `endpoint_snitch` parameter in cassandra.yaml.