[ClusterLabs] Antw: Re: (no subject)

[Ulrich Windl]

>>> Alex Crow <alex at nanogherkin.com> schrieb am 11.03.2019 um 22:28 in Nachricht
<b9512910-431b-d09f-79a0-61dcbcf5e4ca at nanogherkin.com>:
> On 11/03/2019 21:18, Full Name wrote:
>>      I am a complete newbie here, so please bear with me, if I ask something 
> stupid and/or obvious.
>>
>>      I have been able to deploy and configure the software across three 
> nodes, each running on a separate Virtual Box VM. Following the steps 
> mentioned in the  Clusters from Scratch document, I added a resource by means 
> of the command
>>
>>        pcs resource create ClusterIP ocf:heartbeat:IPaddr2 
> ip=192.168.122.120 cidr_netmask=24 op monitor interval=30s
>>
>> This works fine, in that I can, say, SSH into 192.168.122.120, as long as 
> any of the nodes is still up and running; effectively, I will be logged into 
> one of them, depending on the status of the nodes.
>>
>>      In the command line above, my understanding is that IPaddr2 is a script 
> associated with the resource;  heartbeat is essentially tells the cluster 
> where to find the script; and ocf is a standard that the script is supposed 
> to comply with.
>>
>>      The thing is, I need to integrate an application of my own into this 
> framework.  Can anybody point me in the right direction as to how to do this? 
> I have done
>>
>>
> Easiest way is to make sure your app can run as a daemon and set up an 
> init script or systemd config for it. This I have to say is where 
> systemd makes things easier. Then just add it as a systemd or sysv 
> resource in your setup.

Actually I would recommend against that: When starting with a new service I would implement an OCF resource agent.

Regards,
Ulrich