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Thread: Migration strategies from 5.0 to 6.0

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  1. #1
    Join Date
    Mar 2007
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    Default Migration strategies from 5.0 to 6.0

    G'day All,
    We are planning our migration from 5 to 6, and have read through all of the documentation etc, so are happy with doing a backup and performing an inplace upgrade.
    However what does concern me is that if we find a major bug, say missing subfolders or backups are not robust for example. Something that takes a few hours/days/weeks to notice.
    We will have a situation where we can't roll back to 5 easily, because there will be a lot of email processed in the interim.
    So ideally if we had a way to copy all inbound/outbound email into a "standby" queue, and effectively "replay" these back if we had to restore 5.0.
    The process would look something like this(We use VMware):
    Shutdown server
    Do complete backup of the VM.
    Disable the NIC to stop network traffic.
    Start the VM.
    Configure the standby Queues. (perhaps postfix always_bcc?)
    Re-enable the NIC.
    Send a few test emails and verify they go into the standby queues.
    Run a full zm backup
    Perform the upgrade.
    Sit back and wait for the accolades from users.......yeah I know I am dreaming here....
    Then in the unlikely event of a major issue.
    Roll back the zm backup, (or copy the queues and then restore the full VM.)
    Copy the contents of the standby queues back into the inbound queue.
    Let 5.0 reprocess the mail.

    Now having just thought this through, that is only going to work for inbound emails, and not for outbound.... sigh.

    So, does anyone have a solution for this?

    Cheers Ben

  2. #2
    Join Date
    Oct 2009
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    Default Migration from 5.0 to 6.0

    I'm faced with the same problem .
    Trying to migrate my zimbra 5.x to totally new server with zimbra 6.0
    Does any one have a well documented How-to of a Migration process from 5.0 to 6.0.
    Please share it here.

  3. #3
    Join Date
    Nov 2008
    Location
    Maine
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    Default

    I've been trying procedure after procedure to move from Debian4-Zimbra5 to Debian5-Zimbra6.
    If you're not working in a VM environment then I'd suggest using a program like Acronis to backup the system to an image file and then restore that image file on another computer to test your procedures and make sure all services/features work before breaking a live environment.

    These steps are straight forward to not only upgrade Zimbra but Debian. If all you are trying to do is upgrade Zimbra you can stop after step 3 and verify the install.
    Upgrade path from Zimbra 5 on Debian 4 to Zimbra 6 on Debian 5 | Nothing here. Move along.

    Once I upgrade from Debian4-Zimbra5 to Debian4-Zimbra6 the CPUs spike, IMAP/CalDAV aren't accessible, and in the admin interface some of the queue and stats don't load correctly.

    zimbra@mailserver:~$ zmcontrol status
    Host mailserver.domain.tld
    antispam Running
    antivirus Running
    imapproxy Running
    ldap Running
    logger Running
    mailbox Running
    memcached Running
    mta Running
    snmp Running
    spell Running
    stats Running

    Hopefully you have better luck...

  4. #4
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    Mar 2007
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    G'day,

    We managed to upgrade from 5.21-6.03 fine.
    The server was running under ESX, so we backed up,blocked smtp ect took a snapshot and ran the upgrade with no real major issues.
    Couple of minor ones re modifications to postfix etc I think, but certainly nothing big.
    Under Ubuntu 804 LTS. No plans to uprade the OS.

    We chose to do it on a Saturday night, yeah no life, so that our clients would be less likely to be impacted, and then hoped that no major issues arose.
    It still worries me that we don't have a way to reliably "replay" it if something happened that took a while to manifest itself.

    Rgds Ben

  5. #5
    Join Date
    Feb 2010
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    Default

    I have big problem when upgrade from 5.0.18 to 6.0.5.
    It makes lost any users, aliases, and distribution lists.
    Does anyone can help me with this?

  6. #6
    Join Date
    Feb 2007
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    Portland, OR
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    From the sounds of it you didn't upgrade, but rather re-installed. During setup it would have detected your current install and asked you if you wanted to upgrade. If you answered no at this point it would have wiped all user data and created a fresh install.

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