Using the MapR Subnet and MapR External Advanced Options

In the advanced options available under Node Configuration, the MapR Installer allows you to restrict MapR to a subset of network interface cards (NICs) or to specify public IP addresses that can be used with the cluster nodes.

Using these options has the same effect as manually inserting the MAPR_SUBNETS and MAPR_EXTERNAL environment variables into the env_override.sh file on all nodes.

Attention: The MapR Installer does not validate the functionality of the subnets or IP addresses that you provide. If you provide incorrect values, it is possible for the installation to succeed initially and later develop connectivity issues. For this reason, it is critical that you supply accurate values for the MapR Subnet and MapR External advanced options.
MapR Subnet
Allows you to set a subnet mask to restrict MapR services to certain interfaces. The values specified in this field are used to populate the MAPR_SUBNETS environment variable.
Specify one or more comma-separated subnet masks. For example:
10.10.15.0/24,10.10.16.0/24

For more information about how to use the MAPR_SUBNETS environment variable, see Designating NICs for MapR.

MapR External
Allows you to specify external IP addresses for the CLDB, MapR Filesystem, and MAST Gateway nodes.
Do NOT use DNS names. Specify a comma-separated list of tuples of host names and external IP addresses. For example:
node1:1.1.1.1,node2:1.1.1.2,node3:1.1.1.3

The specified node names need to match the host name you specified for the host earlier in Node Configuration. For more information about how to use the MAPR_SUBNETS environment variable, see Designating NICs for MapR.