Changing the path policy of the SCSI lun device using Powercli in Vmware Vsphere Environment
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Today my motto is to change the path policy of the scsi lun from Fixed to round robin. It’s always a pain to change the path policy of the scsi lun device, it takes hours of time to change the path manually in case if we have the large environments of say 2000 ESXi and with more than 400 Devices connected with the Esxi.
so
we used some Powercli and create a loop to perform the redundant task well in
crisp words we tried to automate this task which could save hours of manual
works
Code:
$server = Get-content "C:\hostfile.txt"foreach ($i in $server){
Get-ScsiLun -VmHost $i -CanonicalName "naa.6006*" | where {$_.MultipathPolicy -ne "RoundRobin"} | Set-ScsiLun -MultipathPolicy RoundRobin}
Here
in the above code I am calling the list of ESXi Host in the file named as
hostfile.txt and passing it to the variable $server and this will create an
array of characters over the variable $server , Each character represents Esxi
hosts on devops terms, then each host is passed on to the $i variable and loop
is created using foreach. This is the logical flow of the script.
Now
Moving ahead core functions of the script are the below one :
Get-ScsiLun -VmHost $i -CanonicalName "naa.6006*" –disktype disk | where {$_.MultipathPolicy -ne "RoundRobin"} | Set-ScsiLun -MultipathPolicy RoundRobin
Here
Get-ScsiLun -VmHost $i -CanonicalName "naa.6006*" –disktype disk connects
to the host and checking with the lun disks that has “naa.6006” with the disk
type of disk.
And
where {$_.MultipathPolicy -ne
"RoundRobin"} represents and sorts the
disk that are not RoundRobin and this function is like filtering out the
outputs
Finally
the above one will identify the SCSI luns and Disks which not set with
Roundrobin, now its time to be reactive by making the changes to Lundisk paths
to RoundRobin using Set-ScsiLun -MultipathPolicy RoundRobin , Voila
Amigo we have changed the Storage Path policy from Fixed to Roundrobin.
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