Sunday, 1 June 2014

Vserver/Storage Virtual Machine (SVM) Dismantling


There is a vserver delete command in the Clustershell, but it quite rightly blocks you from destroying the Vserver until you’ve done certain things. The following post takes as an example, a fairly well developed lab SVM, and walks through the steps to dismantling it. This information is useful for tidying up test/lab SVM(s).

Example SVM

We have a cluster called NACLU1 with an SVM called NASVM1. NASVM1 is a fairly well developed SVM - it’s got:

i) A Domain Tunnel for Active Directory Authentication
security login domain-tunnel show

ii) Some DP and XDP SnapMirrors going to other clusters
snapmirror list-destinations -source-vserver NASVM1

iii) Is a destination for some DP SnapMirrors, and also has LS SnapMirrors of its rootvol
snapmirror show -destination-vserver NASVM1

iv) Vserver peers
vserver peer show

v) Vserver transition peers
vserver peer transition show

vi) Mounted Volumes
vol show -vserver NASVM1 -fields junction-path

vii) A number of volumes
vol show -vserver NASVM1

viii) Has a running CIFS server
vserver cifs show -vserver NASVM1

Step by Step - Destroying the SVM

1) Domain Tunnel

NACLU1::> security login domain-tunnel show
NACLU1::> security login domain-tunnel delete

2) SnapMirror Destinations

NACLU1::> snapmirror list-destinations -source-vserver NASVM1
NACLU1::> snapmirror release -destination-path DEST-SVM:DEST-VOL

Repeat until have released all SnapMirror destinations for NASVM1

3) SnapMirror Delete

NACLU1::> snapmirror show -destination-vserver NASVM1
NACLU1::> snapmirror delete -destination-path NASVM1:VOL-NAME

Repeat until have deleted all SnapMirror destinations to NASVM1 (including LS Mirrors)

4) Vserver Peers

NACLU1::> vserver peer show -vserver NASVM1
NACLU1::> vserver peer delete -vserver NASVM1 -peer-vserver PEER-SVM

Repeat until all Peer SVMs have been deleted.

Note: You might need to force delete the Vserver peers.

NACLU1::> vserver peer delete -vserver NASVM1 -peer-vserver PEER-SVM -force true

5) Vserver Transition Peers

NACLU1::> vserver peer transition show -local-vserver NASVM1
NACLU1::> vserver peer transition delete -local-vserver NASVM1 -src-filer-name SRC-7-FILER

Repeat until all Transition Peers have been deleted.

6) Mounted Volumes (with Junction Paths)

NACLU1::> vol show -vserver NASVM1 -fields junction-path
NACLU1::> vol unmount -vserver NASVM1 -volume VOL-NAME

Repeat until all volumes have been unmounted.

Note: Unsurprisingly, cannot unmount the rootvol

7) Volumes

NACLU1::> vol show -vserver NASVM1 -state online
NACLU1::> vol offline -vserver NASVM1 -volume VOL-NAME

Repeat until all volumes have been offlined (including the rootvol.)

NACLU1::> vol show -vserver NASVM1
NACLU1::> vserver show -vserver NASVM1 -fields rootvolume
NACLU1::> vol destroy -vserver NASVM1 -volume VOL-NAME

Repeat until all the volumes have been destroyed leaving the rootvol until the last.

8) CIFS Server

NACLU1::> vserver cifs show -vserver NASVM1
NACLU1::> cifs delete -vserver NASVM1

Note: If your account only has the Minimal Active Directory Permission for Domain Join, the cifs delete will work and won’t delete the Computer Account from Active Directory (a domain admin account will delete the Computer Account.)

9) Vserver

NACLU1::> vserver delete -vserver NASVM1


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