Issue:
The Hostname has been changed for the PowerChute Network Shutdown Virtual Appliance but after the Appliance is rebooted the host name reverts to localhost.

Product Line:
PowerChute Network Shutdown Appliance

Environment:
VMWare ESXi
PowerChute Network Shutdown Appliance 4.x &3.x

Cause:
VAMI scripts that are used when creating Virtual Appliances. Information can be found in VMware Kbase 2009519

Solution:

If running PCNS 4.2 build 6755 or above to change the host name run the command hostnamectl set-hostname "new hostname"
NOTE: Must stop or restart the PCNS service for the host name to change in the PCNS web interface. The commands are service PowerChute stop and service PowerChute start. 

If running older builds of PCNS 
1. Power off PowerChute Network Shutdown Appliance:
2. Right-click on the virtual appliance and click Edit Settings:
3. In the Virtual Machine Properties window click the Options tab:
4. Under the vApp options heading click on Advanced and on the right hand side of the window click on Properties:
5. In the Properties window click on New:
6. In the Edit Settings window
          Category: select Networking Properties
          Label: hostname
          Class ID: select vami
          ID: hostname
          Default Value: desired hostname
             NOTE the desired hostname must be entered in lowercase and cannot have spaces or special characters

7. Click OK to close the window
8. Click OK to close the Advance Properties Configuration window:
9. Click OK to close the Virtual Machine Properties window:
10. Restart the Appliance