Restore HSM volumes

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Restore HSM volumes




Problem

How to restore lost HSM volume


Solution:

1) Restore an account backup to a new account
2) Recreate the filesystem HSM path for the existing account
3) Move the restored HSM blobs to the correct filesystem path
4) Delete the restored account

Preliminary: you need to have the replacement HSM volume mounted at the same path as the old one. For example:

zmvolume -l 
Volume id: 1 
name: message1 
type: primaryMessage 
path: /opt/zimbra/store 
compressed: false 
current: true 

Volume id: 2 
name: index1 
type: index 
path: /opt/zimbra/index 
compressed: false 
current: true 

Volume id: 3 
name: hsm1 
type: secondaryMessage 
path: /opt/zimbra/hsm 
compressed: false 
current: true 

In the above example, /opt/zimbra/hsm was the HSM store. Mount the replacement at /opt/zimbra/hsm, and make sure to

chown zimbra:zimbra /opt/zimbra/hsm 

1) Restore from a full account backup to a new account:

zmrestore -rf -a account@example.com -ca -pre "hsm_" 

Depending on the HSM policy (30 days default), you need to be sure the latest full backup is newer than that (?).

2) Gather account data:

  • Mailbox ID:
zmprov gmi account@example.com | grep mailboxId 
Mailbox ID: 4 
  • Account Hash (substitute actual Mailbox ID):
perl -e "print (mailboxId>>12)" 
Account Hash: 0  
  • Restored Mailbox ID:
zmprov gmi hsm_account@example.com | grep mailboxId 
Restored MailboxID: 37 
  • Restored Account Hash (substitute actual Mailbox ID):
perl -e "print (mailboxId>>12)"
Restored Account Hash: 0 </pre>

3) Recreate the filesystem HSM path for the existing account (/opt/zimbra/hsm/Account Hash/MailboxID):

mkdir -p /opt/zimbra/hsm/0/4 </pre>

4) Move the HSM blobs from the restored account to the real account:

mv /opt/zimbra/hsm/Restored Account Hash/Restored MailboxID/msg /opt/zimbra/hsm/Account Hash/MailboxID/ 

Actual:

mv /opt/zimbra/hsm/0/37/msg /opt/zimbra/hsm/0/4/ </pre>

5) Delete the restored account:

zmprov da hsm_account@example.com  

6) Restart mailboxd for account to see HSM blobs:

zmmailboxdctl restart </pre>

7) Log in to account (account@example.com) and verify HSM messages are there



Submitted by: Raunaq Malik

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