[dm-devel] Native systemd service files for multipathd

[Hannes Reinecke]

On 08/22/2011 06:35 PM, Kay Sievers wrote:
> On Mon, Aug 22, 2011 at 17:45, Hannes Reinecke<hare at suse.de>  wrote:
>> On 08/22/2011 03:47 PM, Christophe Varoqui wrote:
>>> On jeu., 2011-06-30 at 14:10 +0000, "Jóhann B. Guðmundsson" wrote:
>>>>
>>>> Is anyone taking a look at porting the multipathd legacy sysv init
>>>> script to native systemd unit file?
>>>>
>>>> I filed 690828 on 2011-03-25 and yet to receive somekind of response on
>>>> it and unless some action is taken then a) device-mapper-multipath will
>>>> be blocking the Fedora 16 alpha release or b) be ripped out of @base and
>>>> be made sure it does not get installed on the official livecd.
>>>>
>>> What is the status of this request ? Has anyone stepped-in to the job ?
>>> If not I'll look into it. If you have Fedora-specific systemd
>>> implementation guideline, please point me to the appropriate
>>> documentation.
>>>
>> I have talked with Kay&  Lennart about this.
>>
>> The main problem here is that we don't / can't know if a device is
>> multipathed or not; this is basically a policy decision.
>> Even a simple switch (multipath on/off) wouldn't suffice here, as this
>> particular device might be excluded via the configuration file.
>>
>> Idea here is to modify the 'multipath' program to determine if a particular
>> device is handled by multipath or not. If so, _no other_ configuration must
>> be done in that device.
>> The multipathd daemon itself already listens on events from the udev socket;
>> it should be pretty trivial to convert that to socket activation.
>>
>> And, of course, we need to solve the mount problem. Last I've heard was that
>> systemd _won't_ be handling mounting, which in effect means we cannot mount
>> any systems provided via multipath ...
>>
>> What is the status here?
>
> It fully support mounts on boot, dynamically created, or on hotplug,
> with or without automounter support.
>
> But it will not assemble/handle/know anything about any dm/md devices.
>
Yeah, but this should taken care of if and when LVM2 and MD gets 
converted to systemd, right ?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare at suse.de			      +49 911 74053 688
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