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* Go back and now readjust all variables between monitoring type (automatic) failover and simple manually initiated. | * Go back and now readjust all variables between monitoring type (automatic) failover and simple manually initiated. | ||
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Latest revision as of 01:07, 21 June 2016
- This article is a Work in Progress, and may be unfinished or missing sections.
HA-Linux How-To For Testing And Educational Use
References:
- HA-Linux Project Homepage
- Howto: Highly available Zimbra cluster using Heartbeat and DRBD
- DRBD Homepage
- DRBD currently unsupported at this time.
- 1. "disaster recovery through server to server sync (beta)"
- 2. "add active-active support to zcs" , marked as a dup of the above.
- DRBD currently unsupported at this time.
Actual HA-Linux How-To For Testing And Educational Use Homepage
Please see Ajcody-Notes-HA-Linux-How-To
Motive Behind How-To
I hope this gives an easy way to setup through some clustering concepts for an administrator to gain some real-world experience when they currently have none. I plan on walking through each "function" that is behind clustering rather than jumping to an end setup (Linux-HA, Shared Storage, And Zimbra).
The structure will be:
- Setup two machines (physical or virtual)
- Emphasis physical hostname / ip vs. the hostname and ip address that will be for HA.
- Setup virtual hostname and ip address for HA.
- Explain and do ip failover between the two machines.
- Setup a disk mount, we'll use probably use a nfs export from a third machine.
- This will give us an example of expanding the HA conf files to move beyond the ip address failover.
- Adjust HA conf's to now export via nfs a local directory from each server. This will not be a shared physical disk of course.
- Setup a shared disk between the two servers and include it in the HA conf files.
- Can use drbd or maybe figure out a way to share a virtual disk between the two vm's.
- Setup a very simple application to include between the two machines. Something like apache or cups.
- Go back and now readjust all variables between monitoring type (automatic) failover and simple manually initiated.
