Hi Annette,
2008/10/21 Annette Jäkel <[EMAIL PROTECTED]>:
> Hello,
> I configured a Linux-HA-Cluster of two nodes for a redundant NFS Service.
> Its active/passive configuration and do not use DRBD.
>
> In my configuration I manage data coming from a raid array, mirrored with
> some MD Devices (software mirrors), distributed over a lot of file systems
> (xfs+lvm) and then exported by NFS. Linux-HA starting point is a self
> written ressource for the MD devices, followed by OCF LVM ressources. Then
> every filesystem mount is a ressource in linux-ha (from OCF Filesystem RA).
>
> I decided to set an order condition from every file system mount to the
> ressource of the NFS Server. So, NFS Server is not starting before any
> filesystem is mounted. But seems this is not a good idea, because if any of
> the file systems fails, the whole NFS Service breaks down (not started or
> would be stopped by heartbeat because of the ordering).
You have 2 options here:
. First, you may want to manage "exportfs" as resources, instead of
the whole NFS Service.
In this case, "exportfs" can be grouped with your Raid1 + LVM +
Filesystem, and no extra dependencies are needed.
. Or, you may want to set the score of "order" less then 0.
> Can anyone give me a suggestion how to set up the ordering of the
> ressources? Should NFS server starts without any dependency or should it
> start after md devices or LVM rather then after mounting the file systems?
>
> I also think about writing a new OCF compliant RA, which mounts all my file
> systems at once, not only one per ressource. An attribute of such a RA could
> be the name of a config file similar to /etc/fstab with all necessary file
> systems and its devices, mount points, mount options etc.
>
> But maybe it is better to use OCF Filesystem RA furthermore and set up a
> ressource group then hidden the process of mounting file systems within one
> script.
>
> Any opinion?
>
> Thanks in advance for help,
> Annette
>
>
>
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