I am at a customer site using Sun Cluster 3.0 on
Solaris 2.8 servers. Their architected failover
involves two active nodes, where an application is
installed only on one node (primary) and controlled by
the cluster as a resource so it can move to the other
node (backup) during a failover. In order to
facilitate this, the Unix Admins have nightly scripts
that copy an application's files from their primary
node to the backup node so that both nodes are sync'd
up.
The customer requires that NV failover be architected
this way, but they do not want to sychronize the
system directories (/usr/bin & /usr/lib) even though
NV installs some code into these directories. Their
perspective is that applications should not be
installing files into the /usr/bin directory, it
should only contain Solaris OS files.
The Unix Admins attempted to configure failover of NV
without sync'ing the /usr/bin /usr/lib directories
between the nodes. Instead they hardcoded /usr/OV/bin
to PATH and /usr/OV/lib to LD_LIBRARY_PATH. When they
attempted to failover NV to the backup node, NV would
not startup because it was looking for files in
/usr/bin. NV was configured to be started by the
cluster software using netnmrc.
So we are trying to determine how we can configure NV
to failover without having to sync the /usr/bin and
/usr/lib directories.
Any thoughts?
Regards,
Albert Wong
--- James Shanks <jshanks@us.ibm.com> wrote:
> Are you having some sort of problem with this?
>
> I suspect that the answer is largely historical.
> The links are added at
> install time to facilitate the install scripts --
> basically to guarantee
> that the proper environment can be found even in
> bizarre circumstances.
> Adding links in /usr/lib is a very common thing for
> UNIX products to do.
> Putting them in /usr/bin is less so, but even the
> operating systems do it,
> as ls -l will show you. So it's hardly a rare
> thing.
>
> I don't believe that the links are really necessary
> after installation,
> and if you source /usr/OV/bin/NVenvironment then
> you should be able to
> just remove them. You can always add them back
> again if you want. But
> NVenvironment is a relatively recent addition to
> NetView. Putting the
> links into the /usr directories goes back to the
> first versions of the
> product.
>
>
> James Shanks
> Level 3 Support for Tivoli NetView for UNIX and
> Windows
> Tivoli Software / IBM Software Group
>
>
>
> Albert Wong <igcawong@yahoo.com>
> Sent by: owner-nv-l@lists.us.ibm.com
> 10/25/2004 05:20 PM
> Please respond to
> nv-l
>
>
> To
> nv-l <nv-l@lists.us.ibm.com>
> cc
>
> Subject
> [nv-l] 7.1.4 Installation Directories
>
>
>
>
>
>
> I would like to understand the significance of the
> /usr/bin and /usr/lib directories in regards to a NV
> 7.1.4 install. Why does NV need to place files in
> the
> /usr/bin directory when they already exist in
> /usr/OV/bin and why does NV need to make links in
> /usr/lib to /usr/OV/lib?
>
> Regards,
> Albert Wong
>
>
>
> __________________________________
> Do you Yahoo!?
> Read only the mail you want - Yahoo! Mail SpamGuard.
> http://promotions.yahoo.com/new_mail
>
>
__________________________________
Do you Yahoo!?
Take Yahoo! Mail with you! Get it on your mobile phone.
http://mobile.yahoo.com/maildemo
|