VariableBOOTSTRAP_HOST_ID
DescriptionSets an ID for the server at first start up
Default0

ID to choose for this server when starting up the first time. Leave commented out to autoselect the next available ID. If set, the server refuses to run unless the ID matches the state in data. It must be set to a positive non-zero integer. Numbers in the range of 1 through 511 are recommended.

ini files
BOOTSTRAP_HOST_ID=1
BOOTSTRAP_HOST_UUID_COOKIE

BOOTSTRAP_HOST_UUID_COOKIE sets the uuid of this server in the cluster to use a unique identifier of this local filesystem contents. Not set by default.