Migrate users

Patrick Goetz pgoetz at mail.utexas.edu
Mon May 1 09:39:22 EDT 2017

I'm not 100% sure about how cyrus gets installed on CentOS, but can 
attempt to answer some of these:

On 04/30/2017 10:36 PM, Simon Wilson wrote:
> 1. Is 2.4.17 compatible with the mailboxes transferred from the old 
> Cyrus 2.3.7 server?

I upgraded from 2.2 to 2.4 in place and don't recall having any problems.

> 2. Assuming it is? Once the new Cyrus can see the mailboxes, will a 
> reconstruct be needed to have new Cyrus able to see the full mailbox 
> structure? If so with what flags to rebuild out all sub-mailboxes? Will 
> it retain 'seen' / replied flags and ACLs?

Not sure about ACL's, but the "seen" information is stored in 
/var/lib/imap (/var/imap on Arch) in the user directory.

> 3. Do I need to do anything with the contents of /var/lib/imap/ on the 
> old server for retention on the new server?

I'm assuming here that /var/lib/imap is where the mailboxes.db file is 
stored.  You absolutely must migrate this folder to the new server, or 
cyrus won't know about any mailboxes.

> 4. Will I need to rebuild quotas once new Cyrus can see the mailboxes?

Quota information is similarly stored in /var/lib/imap

Last server migration, I had success following this recipe.

  1. Install cyrus, cyrus SASL on new server and copy over
     /etc/cyrus/imapd.conf and /etc/cyrus/cyrus.conf as well
     as any SASL configuration and SSL certs.  If you're
     upgrading, be mindful of cyrus configuration changes which
     need to be made to the /etc/cyrus configuration files.

  2. Stop cyrus on the old server

  3. Copy user mailboxes from old server to new one

  4. Copy the following contents of the configdirectory, usually
     /var/imap or /var/lib/imap or /var/lib/cyrus from the old
     server to the new one:


     (The rest of the content is generated automatically.)

  5. Depending on how you have cyrus set up, you might also need to copy
     /var/spool/cyrus (/var/spool/imap on Arch)

  6. Start the cyrus master on the new server.  Everything should
     just work.

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