HAST & CARP support

[ralphte]

Was looking in to setting up HAST with CARP to provided High Available for NAS4Free. I have already got the system working with the current version. Write up soon to come. Would the community be interested if I where to get the settings setup for the GUI to add to a upcoming build??

[SKL111]

CARP yes!
What is HAST?

[ralphte]

HAST - Highly Available Storage is for building a cluster for storage. it's pretty much raid 1 over two servers over a network. Check out the link below.

http://wiki.freebsd.org/HAST

[alexplatform]

Write up soon to come. Would the community be interested if I where to get the settings setup for the GUI to add to a upcoming build??

Yes please the GUI is gravy. I toyed with the idea of setting up such a configuration but never got around to it. It would be of great value if someone can identify whatever pitfalls that they had to cross, and how it was solved.

[lindsay]

+1 from me

[ScoutMaster]

+1

& then another +1,000,000

I've tinkered, and have had HAST/CARP setup on both FreeNAS, and Nas4Free, but never got into the WebUI.
Some invaluable pages that I referenced when I started out was (in no particular order) ->
http://www.aisecure.net/2012/02/07/hast ... -failover/
http://viktorpetersson.com/2010/09/27/s ... with-carp/
http://qq929962616.72pines.com/2012/03/ ... n-freenas/
http://wiki.freebasd.org/HAST/

One thing that would be really nice in a WebUI, would be 'hastctl status' info, as well as a test & **RECOVERY** feature (eg for assiting in resolving Split Brain etc ), as I like to test stuff like this every so often so that I dont fall short in an emergency. Also being able to switch primary/secondary nodes to be master/slave would be helpful as well as having some form of cross check in place before/after etc.

An awesome feature would be to have each node accessable from the same WebUI. ie, so it can access the 'second' node, and update/apply configs accordingly.
Having ability to tweak settings for each node, eg advskew (ifconfig for carp - different on each node), as well as other misc settinsg like adding/changing a 'resource' in hast.conf

Consider with HAST, as much as its High Avail for your precious data, you now have >2x chance of something going wrong. HAST will only work with two nodes. Wish it would be more like raid6.

I have multiple chunks of identical server H/W sitting around, ready waiting to help test if wanted / needed.

[bdekker]

I have just setup nas4free with HAST & CARP and it works fine. You have to put back some modules (if_carp.ko, geom_gate.ko /etc/rc.d/hastd, /sbin/hastd and /sbin/hastctl) and enable the modules in the loader.conf. Once you 'r done, add the carp0 interface to the rc.d and you can config it using the gui. Add some preinit commands to put back the additional modules (cp /cf/boot/hast* /sbin , cp /cf/conf/hastd /etc/rc.d, cp /cf/conf/hast.conf /etc, cat /cf/conf/devd.conf.add >> /etc/devd.conf ) and make a script to switch from slave to master and vice versa. In order to make the changes mount the /cf directory rw (mount -uw /cf).

It would be nice if nas4free can ship the if_carp.ko and geom_gate.ko and the /etc/rc.d/hastd, /sbin/hastd and /sbin/hastctl ! Manually editing the disks was not really a problem for me, the xml file is very easy to understand but It would be nice if the gui would recognize them right away.

[zoon01]

Please try build 9.1.0.1.509

have a nice day

[pug]

it would be necessary to kill hastd via ssh, after that HAST was configurable on NAS4free. Until that kill, NAS4free was not able to initialize HAST.

Web GUI should also support such devices, please see bug #60 in bugtracker.