Question about HA setup

Discuss your pilot or production implementation with other Zimbra admins or our engineers.
sgtstadanko
Posts: 26
Joined: Fri Sep 12, 2014 10:05 pm

Question about HA setup

Postby sgtstadanko » Fri May 18, 2007 9:29 am

Hi All,
I am looking for advice in setting up Zimbra in HA mode. I want to run 2 servers so that if one dies, fails or runs out of disk the other server will pick it up. Whats the best way to go about doing this. I already have ZCS 4.0.2 running under FC4 and need to choose the correct OS on my new server to make this work properly and was not sure whether Ubuntu or RHEL4 was the way to go.


Thanks,

Bill


Klug
Elite member
Elite member
Posts: 2359
Joined: Mon Dec 16, 2013 11:35 am
Contact:

Question about HA setup

Postby Klug » Fri May 18, 2007 9:49 am

The best (and only supported) way is to use Zimbra NE with RHEL4 and RHCS (Red Hat Cluster Suite).
sgtstadanko
Posts: 26
Joined: Fri Sep 12, 2014 10:05 pm

Question about HA setup

Postby sgtstadanko » Fri May 18, 2007 9:52 am

Is RHCS part of RHEL4 or do you have to purchase that.
Klug
Elite member
Elite member
Posts: 2359
Joined: Mon Dec 16, 2013 11:35 am
Contact:

Question about HA setup

Postby Klug » Fri May 18, 2007 10:26 am

It seems (from RH website) to be an additional layer (ie price) to a RHEL subscription : http://www.redhat.com/software/rha/cluster/
andreychek
Advanced member
Advanced member
Posts: 155
Joined: Fri Sep 12, 2014 9:58 pm

Question about HA setup

Postby andreychek » Fri May 18, 2007 12:37 pm

[quote user="sgtstadanko"]I am looking for advice in setting up Zimbra in HA mode. I want to run 2 servers so that if one dies, fails or runs out of disk the other server will pick it up. Whats the best way to go about doing this. I already have ZCS 4.0.2 running under FC4 and need to choose the correct OS on my new server to make this work properly and was not sure whether Ubuntu or RHEL4 was the way to go.[/QUOTE]

Hey Bill,
Though not supported by RedHat, Ubuntu or Zimbra, another way to accomplish failover would be to use DRBD and Heartbeat.
DRBD is basically a form of "network RAID", and heartbeat monitors a server and can make a backup come online in case of a problem.
The setup is described in this thread:

Good">http://www.zimbra.com/forums/showthread.php?t=2845&highlight=drbd
Good
luck!

-Eric
Klug
Elite member
Elite member
Posts: 2359
Joined: Mon Dec 16, 2013 11:35 am
Contact:

Question about HA setup

Postby Klug » Fri May 18, 2007 2:01 pm

CentOS obviously proposes an equivalent to RHCS.

But not supported either.
russgalleywood
Outstanding Member
Outstanding Member
Posts: 251
Joined: Fri Sep 12, 2014 10:15 pm

Question about HA setup

Postby russgalleywood » Wed May 23, 2007 6:07 am

Hi Guys,
I too am interested in this also for failover purposes.
I am new to the Cluster idea so have some simple, perhaps even idiotic questions!

Here goes...
If you have NE version of Zimbra then it can be configured to use the Redhat/CentOS Cluster Suite with no additional configuration other than that required in the Suite setup instructions? (Obviously, doing this with CentOS is not supported)
No additional Zimbra license is required for the additional Server in the Cluster?
Is it really worth doing it anyway?
I am most concerned that I could be doing more harm than good this way as it is something else to go wrong! Is it in fact better to just create replica LDAP and MySQL servers and just keep good backups?
Thanks
Russ
mmorse
Ambassador
Ambassador
Posts: 6036
Joined: Fri Sep 12, 2014 10:24 pm

Question about HA setup

Postby mmorse » Wed May 23, 2007 6:50 am

A little more involved than that-most make use of a SAN

RHCS methods:

Clustering on single-node config

Clustering on multi-node configs

-and people often fail to follow the multi-node cluster upgrading procedures for that
Your not changing the amount of users-no license change to Zimbra. RHCS pricing though.
For large companies or those who want serious reliability for the mailboxes-it's worth doing. -everyone's needs are different, and there are many ways to do clustering as well, but zimbra (the company) can't be expected to cover them all with support :)
WIKI multi-server stuff

OS multi-server install guide

NE multi-server install guide
gmsmith
Outstanding Member
Outstanding Member
Posts: 432
Joined: Fri Sep 12, 2014 10:09 pm

Question about HA setup

Postby gmsmith » Wed May 23, 2007 6:55 am

Russ,
There are no additional software licenses required from Zimbra to introduce a cluster, however introducing a cluster requires some common storage between the two servers (shared disc, san, something..), fencing, and some other things. You may want to look at:
Clusters">http://www.centos.org/docs/5/html/Cluster_Suite_Overview/s1-hasci-overview-CSO.html
Clusters
are very worth doing if you need them :)
You may want to just maintain your backups, copy off machine and then do test restores every once and a bit.
As a side note, the information you got regarding LDAP and MySQL while you were traveling was crap. :)
mmorse
Ambassador
Ambassador
Posts: 6036
Joined: Fri Sep 12, 2014 10:24 pm

Question about HA setup

Postby mmorse » Wed May 23, 2007 6:57 am

[quote user="gmsmith"]As a side note, the information you got regarding LDAP and MySQL while you were traveling was crap. :)[/quote]

Might want to explain what you meant...that could spin multiple ways...

Return to “Administrators”

Who is online

Users browsing this forum: No registered users and 4 guests