How to filter local disks that should not be managed by multipathd?

How to filter local disks that should not be managed by multipathd?

[Xieyingtai]

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Hi,
   Recently I encountered a problem, In certain scenarios that a new local disk was hot plugged, I have no way
to obtain the wwn of the disk in advance, so I can not filter that disk by adding it to blacklists. Actually there
is no need for multipathd to  take over local disks in the hot-plugged sceno. And find_multipaths param seems not to be
a perfect way to solve this problem. Is there any way to  provide a param in /etc/multipath.conf for mulitpathd to manage
only ISCSI or FC bus disks? In that configuration, path_discovery() will only scan devices which were underline ISCSI bus
or FC bus in sysfs.

Thanks.

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Re: How to filter local disks that should not be managed by multipathd?

[Xose Vazquez Perez]

On 07/18/2016 01:59 PM, Xieyingtai wrote:
> Hi,
> 
>    Recently I encountered a problem, In certain scenarios that a new local disk was hot plugged, I have no way
> 
> to obtain the wwn of the disk in advance, so I can not filter that disk by adding it to blacklists. Actually there
> 
> is no need for multipathd to  take over local disks in the hot-plugged sceno. And find_multipaths param seems not to be
> 
> a perfect way to solve this problem. Is there any way to  provide a param in /etc/multipath.conf for mulitpathd to manage
> 
> only ISCSI or FC bus disks? In that configuration, path_discovery() will only scan devices which were underline ISCSI bus
> 
> or FC bus in sysfs.

Add a rule in the "blacklist section" to exclude ALL,
and then fill the "blacklist_exceptions section" with
the desired devices.