  The University of California system has excellent networking between all of
its campuses as well as a number of other Universities in CA, including
Caltech, most of them being connected at 100 Gbps. UCSD and Caltech have thus
joined their disk systems into a single logical xcache system, with worker
nodes from both sites accessing data from disks at either site. This setup has
been in place for a couple years now and has shown to work very well.
Coherently managing nodes at multiple physical locations has however not been
trivial, and we have been looking for ways to improve operations. With the
Pacific Research Platform (PRP) now providing a Kubernetes resource pool
spanning resources in the science DMZs of all the UC campuses, we have recently
migrated the xcache services from being hosted bare-metal into containers. This
paper presents our experience in both migrating to and operating in the new
environment.
