[ClusterLabs] Need help in setting up HA cluster for applications/services other than Apache tomcat.

[Ken Gaillot]

On 02/18/2017 10:55 AM, Chad Cravens wrote:
> Hello Vijay:
> 
> it seems you may want to consider developing custom Resource Agents.
> Take a look at the following guide:
> http://www.linux-ha.org/doc/dev-guides/ra-dev-guide.html
> 
> I have created several, it is pretty straightforward and has always
> worked as expected. I would say one of the most important parts of
> creating a custom RA script is to make sure you have a good method for
> determining the state of a resource with monitor()
> 
> Good luck!

Agreed, a custom resource agent is the most flexible approach. More
details in addition to above link:

http://clusterlabs.org/doc/en-US/Pacemaker/1.1-pcs/html-single/Pacemaker_Explained/index.html#ap-ocf

If your services already have LSB init scripts or systemd unit files,
Pacemaker can use them directly instead -- just configure the resource
as lsb:myscriptname or systemd:myunitname. Pacemaker will look for those
files in the usual system locations for such things. That doesn't have
as much flexibility as a custom agent, but if you already have them,
it's the easiest approach.

> On Fri, Feb 17, 2017 at 8:22 AM, vijay singh rathore
> <vijayrathore.rjit88 at gmail.com <mailto:vijayrathore.rjit88 at gmail.com>>
> wrote:
> 
>     Hi Team,
> 
>     Good Morning everyone, hope you all are doing great.
> 
>     First of all I would like to apologise, if I have created
>     inconvenience for team members by sending this mail.  
> 
>     I have a question and i have tried almost all possible forums and
>     googled a lot before reaching to this group for help.
> 
>     I want to create HA cluster for applications/services which are not
>     in tomcat or related to Apache or MySQL. Let's say they are written
>     in different languages such as java, node js, c++, and deployed in
>     certain path i.e. /home/xyz
> 
>     How can i add these applications for high availability in HA cluster
>     using pcs/pacemaker/corosync.
> 
>     If I have to create resource for these applications how to create
>     and if i have to use some other way, how can i implement it.
> 
>     Requesting you to please provide me some suggestions or reference
>     documents or links or anything which can help me in completing this
>     task and to test fail over for these applications.
> 
>     Thanks a lot in advance, have a great day and time ahead.
> 
>     Best Regards
>     Vijay Singh
> 
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> 
> 
> -- 
> Kindest Regards,
> Chad Cravens
> (843) 291-8340
> 
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> Chad Cravens
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