So I really need to test HALizard
DustinB3403 last edited by scottalanmiller
So I really need a way to test HALizard, and become comfortable with the setup of it for my Xenserver setup (in the future) as it appears we are likely going to be going forward with my proposal (which is awesome) but still has me nervous.
I'm thinking I'm going to tear down my current home lab and test with that. Which kind of sucks, but at least it gives me some experience with it.
If anyone has any pointers, like how to install DRBD on XenServer 6.5 that would be a cool way to help me get started on this.
Here's the list of requirements for HALizard
- XCP version 1.6 or XenServer version 6.1/6.2/6.5
- DRBD Version 8.3 or 8.4
- iSCSI target – TGT
- Pool HA – Open Source HA-Lizard 22.214.171.124 or newer
I have a feeling I'll likely be the person who has to get everything configured (even though I'm pushing for support) so any guidance would be a godsend.
Thanks ML.it community.
scottalanmiller last edited by
Doesn't HA-Lizard do the DRBD installation for you?
@scottalanmiller Just doing some research on it now, figured I'd put the feelers out there for pointers.
I've got a beater server at my house that I'll be testing this with today once I get out of the office so I'll hopefully have some pointers for people in a bit.
The HA-Lizard project is made up of three applications:
HA-Lizard - this is a complete high availability framework (replacement for XenServer HA feature). It does not require any other applications to work. Documentation for this component is available here:
iSCSI-HA - this is a storage management and storage high availability application. It is specifically written to work in a 2-node xenserver environment and allows you to utilize local storage in a high availability pool without any restrictions (meaning - live migration, etc.. will function as if you had an external SAN). It relies on DRBD for replication. Think of it as a high availability iSCSI SAN collapsed into dom0. This is the document you were referring to in your post:
noSAN Installer script - this is a script which automates the entire installation process of building a 2-node HA pool.
A video tutorial is available which describes the entire process here:
With all of that said - you have a few options when it comes to installation:
1- if you only need HA - then only install HA-Lizard and follow the HA-Lizard installation and reference guide. HA will work with any number of hosts in a pool - even 1 (in a 1 node pool - HA-Lizard acts as a VM watchdog)
2- If you are looking to build a 2-node HA pool with local storage (most of our users are doing this), then you will need to install both HA-Lizard AND iSCSI-HA. You can do this in one of 2 ways:
the hard way - follow our reference design for a 2 node HA pool which provides step-by-step instructions. This option is preferred for users that want to understand how the entire solution works. The reference design can be downloaded here:
http://halizard.com/images/pdf/iscsi-ha 2-node cluster howto_1.5_final.pdf
the easy way - run the noSAN installer script on a fresh pair of xenserver hosts and everything will be installed for you automatically.
This installer performs ALL of the installation steps described in the reference design guide.
I hope this helps. Please post any questions or issues on the HA-Lizard forum which is monitored regularly.
@halizard You don't happen to have a link to the easier HA-Lizard AND iSCSI-HA installation script handy do you?
here you go - there are some prerequisites. The installer will not run unless you first:
- join 2 servers to a pool
- create a dedicated replication link (ideally 2 bonded Ethernet ports)
- pool must have internet connectivity for installer to work
@halizard Awesome, thank you and your group a crap ton for me.
Gives me stuff to work on!