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

Usage:
  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

Flags:
  -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

Power Control#

Power Control