Node Maintenance

This page describes how to conduct common node maintenance tasks in a Merge facility.

Power Control

Merge testbed facilities have a centralized node power control service called Beluga.

Beluga is an abstraction layer that hides the details of controlling the power of devices through PDU, IPMI/Redfish or hypervisor specific mechanisms.

Usage of the beluga utility is straight forward.

beluga -h
Beluga client utility
beluga [command]
Available Commands:
cycle Cycle a device
help Help about any command
list List devices
off Turn off a device
on Turn on a device
status Get device power status
version Show beluga version
-h, --help help for beluga
Use "beluga [command] --help" for more information about a command.
  • cycle will turn a node off, wait for a short period then turn it on.
  • off will turn a node off
  • on will turn a node on

The power status of nodes may be queried via status

You can also show all available devices and what their underlying power control mechanism is.

beluga list
a0 ipmi
a1 ipmi
a2 ipmi
a3 ipmi
m0 minnow
m1 minnow
mc0 apc
mc1 apc
n0 apc
n1 apc
n2 apc