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тАО09-22-2008 02:30 AM
тАО09-22-2008 02:30 AM
I'm looking at using Serviceguard to create a simple High-Availability cluster of Apache httpd servers.
Looking at the documentation on this product, there's a lot of talk about shared disk volumes, SAN etc.
What I want is just three httpd servers configured so that if the 'master' server fails, one of the others will take over, using a reallocatable IP address. This is all I want, no shared volumes, no quorum server, nothing else.
Looking at the hp documentation it appears Serviceguard may be too 'heavyweight' for my needs.
My questions are:
1. Is my simple web server simple possible with Serviceguard, or do I need to create shared disk volumes?
2. I have version 11.17, are there any fixpaks I need for this? I keep getting 'Node refusing Serviceguard communication', despite following all instructions on working around not having identd running, setting up cmlnodelist etc.
Solved! Go to Solution.
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тАО09-22-2008 02:55 AM
тАО09-22-2008 02:55 AM
Re: General questions on Serviceguard (planning an installation, and teething problems).
No problem to create the package without shared storage - in package control files just add httpd stop and start scripts.
When package fail from one node to another it silmply will do the following:
node1: stop httpd
node1: remove shared IP
node2: apply shared IP config
node2: run httpd
regards,
ivan
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тАО09-22-2008 02:58 AM
тАО09-22-2008 02:58 AM
Re: General questions on Serviceguard (planning an installation, and teething problems).
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тАО09-22-2008 03:00 AM
тАО09-22-2008 03:00 AM
SolutionIt is recomended for more than 3 nodes cluster and in your case (you don't have a cluster lock disk) it is mandatory.
See more info about quorum here - http://docs.hp.com/en/B3936-90078/ch01s06.html
regards,
ivan
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тАО06-17-2009 12:55 PM
тАО06-17-2009 12:55 PM
Re: General questions on Serviceguard (planning an installation, and teething problems).
Alternatively, you can create a 2 node cluster and have the 3rd node run your quorum service.
QS is supported on RedHat, Suse, and HP-UX. It would be nice if HP would support it on Windows as well. On second though, maybe not... :)
-tjh
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тАО06-18-2009 01:17 PM
тАО06-18-2009 01:17 PM
Re: General questions on Serviceguard (planning an installation, and teething problems).
Have a look at RSF-1, LifeKeeper, or even the cluster technologies for your distribution.
RSF-1 certainly doesn't use lock-luns or a quorum server.
Discontinuation notice can be found here:
http://h18026.www1.hp.com/solutions/enterprise/highavailability/linux/serviceguard/discontinuance.html
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тАО06-18-2009 06:07 PM
тАО06-18-2009 06:07 PM
Re: General questions on Serviceguard (planning an installation, and teething problems).
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тАО06-19-2009 09:50 AM
тАО06-19-2009 09:50 AM
Re: General questions on Serviceguard (planning an installation, and teething problems).
Life-Keeper uses SCSI-reservations on the LUNs under its control - however it requires a partition on the LUN to achieve this. This is fine for new clusters - but a real pain for existing ones where you need to migrate (I have a few, and they are large clusters - I have one with 14TB of storage for example).
RSF-1 doesn't - so its a bit more of a challenge. But it does make migration easier.
Not sure about VCS - haven't got that far in my quest for an SG replacement yet.....