Changing IP Addresses

To change IP addresses on a cluster, generate a configuration file of the currently state of the nodes with their current IP addresses, edit the file to change one or more IP addresses as desired, re-load the file, and trigger the head node to recompute the new addresses and update the database. For example:

scyld-cluster-conf save new_cluster.conf
# manually edit new_cluster.conf to change IP addresses
scyld-cluster-conf load new_cluster.conf
scyld-nodectl -i <NODES_THAT_CHANGE> update ip=

The new addresses are not seen by compute nodes until they reboot or perform a dhcp renewal.