Re: /sys/class/rbd does not exist after loading ceph module

Re: /sys/class/rbd does not exist after loading ceph module

[Xiaoguang Liu]

 I would like to try the RBD feature of Ceph. I am following
http://ceph.newdream.net/wiki/Rbd,  but failed at :

 echo "xxx name=admin rbd foo" > /sys/class/rbd/add


 It was because folder /sys/class/rbd does not exist. But ceph kernel
module is loaded and I can mount -t ceph xxxx:/ /mnt/ceph.

 I am using kernel 2.6.34.1 on fedora 13.

 the following symbols are set in .config while compiling the kernel.

 CONFIG_CEPH_FS=m
 CONFIG_CEPH_FS_PRETTYDEBUG=y

 Ceph 0.20.2 is installed by yum.

 Did I miss anything?
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Re: /sys/class/rbd does not exist after loading ceph module

[Thomas Mueller]

Am Fri, 30 Jul 2010 16:41:51 +0800 schrieb Xiaoguang Liu:



> I would like to try the RBD feature of Ceph. I am following
> http://ceph.newdream.net/wiki/Rbd,  but failed at :

* did you really compile the ceph.ko module from source?
* did you verify that you actually loaded the right ceph.ko module and 
not stock ceph.ko?

general note: do use the new 0.21. you won't get happy with 0.20.2.

- Thomas

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Re: /sys/class/rbd does not exist after loading ceph module

[Xiaoguang Liu]

I though all ceph client, including RBD, was already included in
kernel 2.6.34. so I just download it from kernel.org and compile it,
like make menuconfig, make, make modues_install etc.

Do you mean that I still need patch kernel 2.6.34 and build the new ceph.ko?


> I would like to try the RBD feature of Ceph. I am following
> http://ceph.newdream.net/wiki/Rbd,聽 but failed at :

* did you really compile the ceph.ko module from source?
* did you verify that you actually loaded the right ceph.ko module and
not stock ceph.ko?

general note: do use the new 0.21. you won't get happy with 0.20.2.

- Thomas


On Fri, Jul 30, 2010 at 4:41 PM, Xiaoguang Liu <syslxg@gmail.com> wrote:
>  I would like to try the RBD feature of Ceph. I am following
> http://ceph.newdream.net/wiki/Rbd,  but failed at :
>
>  echo "xxx name=admin rbd foo" > /sys/class/rbd/add
>
>
>  It was because folder /sys/class/rbd does not exist. But ceph kernel
> module is loaded and I can mount -t ceph xxxx:/ /mnt/ceph.
>
>  I am using kernel 2.6.34.1 on fedora 13.
>
>  the following symbols are set in .config while compiling the kernel.
>
>  CONFIG_CEPH_FS=m
>  CONFIG_CEPH_FS_PRETTYDEBUG=y
>
>  Ceph 0.20.2 is installed by yum.
>
>  Did I miss anything?
>
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Re: /sys/class/rbd does not exist after loading ceph module

[Wido den Hollander]

Hi Xiaoguang,

You will have to download the source from git like explained on:
http://ceph.newdream.net/wiki/Rbd

But the module will not compile against 2.6.34, only against 2.6.35

There is a rbd-backport branch in "ceph-client-standalone.git", but i'm
not sure how up to date that one is.

If you want to test RBD, i would recommend upgrading to 2.6.35.

Wido

On Fri, 2010-07-30 at 21:17 +0800, Xiaoguang Liu wrote:
> I though all ceph client, including RBD, was already included in
> kernel 2.6.34. so I just download it from kernel.org and compile it,
> like make menuconfig, make, make modues_install etc.
> 
> Do you mean that I still need patch kernel 2.6.34 and build the new ceph.ko?
> 
> 
> > I would like to try the RBD feature of Ceph. I am following
> > http://ceph.newdream.net/wiki/Rbd,聽 but failed at :
> 
> * did you really compile the ceph.ko module from source?
> * did you verify that you actually loaded the right ceph.ko module and
> not stock ceph.ko?
> 
> general note: do use the new 0.21. you won't get happy with 0.20.2.
> 
> - Thomas
> 
> 
> On Fri, Jul 30, 2010 at 4:41 PM, Xiaoguang Liu <syslxg@gmail.com> wrote:
> >  I would like to try the RBD feature of Ceph. I am following
> > http://ceph.newdream.net/wiki/Rbd,  but failed at :
> >
> >  echo "xxx name=admin rbd foo" > /sys/class/rbd/add
> >
> >
> >  It was because folder /sys/class/rbd does not exist. But ceph kernel
> > module is loaded and I can mount -t ceph xxxx:/ /mnt/ceph.
> >
> >  I am using kernel 2.6.34.1 on fedora 13.
> >
> >  the following symbols are set in .config while compiling the kernel.
> >
> >  CONFIG_CEPH_FS=m
> >  CONFIG_CEPH_FS_PRETTYDEBUG=y
> >
> >  Ceph 0.20.2 is installed by yum.
> >
> >  Did I miss anything?
> >
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> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
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