| 1 |
Hi Mal, |
| 2 |
|
| 3 |
> I run a Apache2 webserver and Postfix as per the virtual mailhost |
| 4 |
> guide... |
| 5 |
> |
| 6 |
> For resilience I would like to have two gentoo boxes doing these tasks |
| 7 |
> for load balancing / redundancy - how can this be achieved? Is there a |
| 8 |
> tool that will allow replication of the config files / mysql stuff to |
| 9 |
> allow the boxes to basically be a cluster ? |
| 10 |
|
| 11 |
Thats not so easy to answer. Different solutions exists, each with pros |
| 12 |
and cons. It also depends heavily on the professional grad your solution |
| 13 |
should be. |
| 14 |
|
| 15 |
You can solve this at different Levels: Hardware, OS, application. |
| 16 |
Hardware is expensive. OS far from perfect (i.e. openssi, openmosix). |
| 17 |
Applications must be cluster aware, moast aren't. |
| 18 |
|
| 19 |
Do you mean http://www.gentoo.org/doc/en/virt-mail-howto.xml? If so you |
| 20 |
have to manage a bunch of apps: postfix, mysql, cyrus, apache. |
| 21 |
|
| 22 |
Just some keywords: |
| 23 |
|
| 24 |
easy with postfix: DNS round robin (solution inside DNS Server, nearly |
| 25 |
all MTAs are aware of this) |
| 26 |
|
| 27 |
mysql: not "multi master" ready, just redundancy "master->slave", try |
| 28 |
postgres |
| 29 |
|
| 30 |
apache: behaves in sens of "read only" -> LVS |
| 31 |
|
| 32 |
cyrus: moast difficult part (shared storage/CFS,???) -> |
| 33 |
NAS|SAN+CFS+LVS+?dono? |
| 34 |
|
| 35 |
Cluster/HA is a complex area. Perhaps you want a simple not so perfect |
| 36 |
solotion? Try periodicaly rsynced standby with manual switch over. |
| 37 |
|
| 38 |
Sascha. |
| 39 |
-- |
| 40 |
gentoo-user@g.o mailing list |
Archives