[Users] Designate Master Storage Domain

[Karli Sjöberg]

ons 2013-08-14 klockan 22:18 -0500 skrev Dead Horse:
Is there any method of designating which domain should be the master storage domain or forcibly changing the role to a different storage domain?


EG: Given the following example


Storage Domain A (Master) --> NFS --> Storage Server 1

Storage Domain B --> NFS --> Storage Server 2


One wants to do maintenance to Storage Server 1 but in doing so the Master storage domain is hosted from Storage Server 1. Thus the net result of taking down Storage Server 1 is that one must also take down Storage Server 2.


Thus we know we must shut down VM's from Storage Domain A to maintenance Storage Server 1. Suppose however that VM's are running that we don't want to shut down and are hosted from Storage Domain B via Storage Server 2.


We would want to be able to promote Storage Domain B to Master so that we can take down Storage Domain A to do maintenance to Storage Server 1.


Once we are done with maintenance to Storage Server 1 we can bring Storage Domain A back on line, re-designate it as Master if desired and bring it's VM's back online.


I know I have seen this occur automatically to a point when a Storage Domain goes missing that is the Master Domain but I have not noted any manual method of doing so given the above scenario.


- DHC


How about just pausing the VM's from webadmin, shut engine down, do maintenance, start engine back up and then run the VM's again?

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Med Vänliga Hälsningar
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Karli Sjöberg
Swedish University of Agricultural Sciences
Box 7079 (Visiting Address Kronåsvägen 8)
S-750 07 Uppsala, Sweden
Phone:  +46-(0)18-67 15 66
karli.sjoberg at slu.se<mailto:karli.sjoberg at adm.slu.se>
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