Migrating from Snow Leopard to Mountain Lion Server

Hi all.  I kinda drop in and out of this forum, mostly when I've got a puzzler that I can't figure out.  My journey from Snow Leopard to Mountain Lion was a little slow.  I tried to make the transition from Snow Leopard to Lion and failed, but this time I made it and I thought I'd share a little scratchpad post I wrote to document what I did.  Mostly this is about adding back a few things that I really need.  Here's the list of stuff that I added back:
Firewall management (IceFloor)
MySQL
Webmail, email filtering rules and email aliases (RoundCube)
"Group" emails (short, multi-recipient email exploders)
Mailing lists (Mailman)
I also dramatically improved reliability by adding a lot of memory, and doing nightly-restarts of the machine.
Here's a link to the post
     http://www.haven2.com/index.php/archives/migrating-from-snow-leopard-server-to-o sx-server-mountain-lion
I'm happy to report that the new server has been running for a month or so and all seems fine.  Whew.  A long journey.  Thanks to all of you who posted things that helped me along the way.  Hopefully this will return the favor.

Moving from Snow Leopard to Mountain Lion means first installing the client (non-Server) version of Mountain Lion and then install Server.app this means that for at least part of the process you will not be running DNS, DHCP or Open Directory.
If you are going to end up using the same DNS name and IP address after the change then an approach you could follow would be as follows.
Destroy any Open Directory replicas
Archive your Open Directory Master (to make a backup)
Note down your DNS records in case they get messed up
Export via Workgroup Manager your users, and groups (you might not need this but better safe than sorry), make sure you do not include the diradmin account
Keep a full back of the server (you should always have backups)
Note down your DHCP server settings in case they get messed up
Note down any other service settings
Install Mountain Lion
Install Server.app
Install Workgroup Manager (extra free download)
Run Server.app
Make sure settings for services are as much as possible the same as before
If your lucky that may be all you need to do, otherwise...
Restore Open Directory archive, if your lucky that will be all you need to do, otherwise...
Make new Open Directory Master
Run Workgroup Manager
Import users and groups you previously exported
You will then have to set passwords for each user as these are not preserved via Workgroup Manager export
When I did this, I was also being forced to change all my IP addresses so I had no choice but to use Workgroup Manager to export and import accounts.

Similar Messages

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    You should be able to Software Update and that will bring your iPhoto up to date.
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    Should I use the Migration Assistant? Or is there a setup option to import my files during the first Mountain Lion boot? Or what else would be healthier/recommended?
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    Hi,
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  • Upgrade from Snow Leopard to Mountain Lion erase my Windows partition?

    Dear all,
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  • Upgrading from snow leopard to mountain lion will i have trouble using my Pages and Iphoto since it's not the latest version

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  • Search in finder doesn't find my files in OS 10.8, upgrade from snow Leopard to Mountain Lion

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  • Before upgrading my system from Snow Leopard to Mountain Lion I had taken a backup of iPhoto in my external drive. But now when I try to open that package, I'm directed to app store to buy new iPhoto. How can I retrieve my photos without buying iPhoto?

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  • I have updated my mac from snow leopard to mountain lion 3 days back. I had some important data in my library folder and it got overwritten. Is there any way i can get the data back from my snow leopard library folder?

    I have updated my mac from snow leopard to mountain lion 3 days back. I had some important data in my library folder and it got overwritten. Is there any way i can get the data back from my snow leopard library folder?
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  • Hi I've just upgraded from Snow Leopard to Mountain Lion now Quarkxpress 6.5, Adobe creative suite CS2, Adobe Acrobat 7.0 professional and Microsoft Office 2004 will nolonger open. Can anyone please advise me what I can do to get these programs running.

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  • Do I need to update Bootcamp 3.3 after upgrading from Snow Leopard to Mountain Lion?

    Do I need to update Bootcamp 3.3 after upgrading directly from Snow Leopard to Mountain Lion? If so, what is the recommended version for my machine?
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