[Linux-cluster] SOLVED Netmask bit set to 32 in service ip

[Pavlos Parissis]

On Fri, 15 Feb 2008 10:29:32 -0500
Lon Hohberger <lhh at redhat.com> wrote:

> On Fri, 2008-02-15 at 10:13 +0200, Pavlos Parissis wrote:
> 
> > It works now and I know why it didn't work before.
> 
> Actually, it's luck... see below. ;)
> 
> > The last time I saved a copy of the ip.sh under /usr/share/cluster,  
> > reading you comment bellow I can guess that the backup file was used  
> > and not the patched file, even the backup file had a name ip.sh-bak.
> 
> It's because readdir() doesn't necessarily read things in alphabetic
> sort order.  So, if the directory entry for 'ip.sh-original' came before
> 'ip.sh', 'ip.sh-original' would get picked as the provider for the 'ip'
> resource.
> 
> However, if you remove a file or two and create new ones, there's a
> chance that the directory entry might come after 'ip.sh'... making
> things work!
> 
> The rule to remember is that we won't use anything in /usr/share/cluster
> that does not have the execute permissions bit set, so you can create
> backups in /usr/share/cluster -- just 'chmod -x' them :)
> 
> The theory for this mode of operation is that we don't have to impose
> file name extension requirements on users and developers (for example,
> SAP* have no extensions - they were developed by the open source
> community)...

I prefer to have restrictions and requirements set, make life more predictable...

> > I am sorry but I did expect from the cluster to pick up the backup file.
> 
> ...The downside is that it traps unsuspecting users - such as
> yourself. :)
> 
> Maybe we should put a 'README' file in /usr/share/cluster?  (Or at least
> a FAQ entry on the wiki?)

Both will be better - README files are faster to be found and wiki pages are better readable

Thanks for the explanation

Pavlos