Error while creating ceph cluster

Error while creating ceph cluster

[Lalit Bhasin]

Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
Getting errors during mk file system : http://dpaste.com/hold/549518/.
Any idea what's going wrong?


- Lalit

Re: Error while creating ceph cluster

[Lalit Bhasin]

On Thu, 2011-06-02 at 15:14 +0000, Jeff Wu wrote:
> Hi ,
> try the steps:
> 1. use root user;
> 2. manually create /data/osd${N} folder.
Jeff, I ensured that /data/osd0 ( on node0) and /data/osd1 ( on node1)
existed before shooting this command on node1. Got same error using root
user also ( ofcourse this time there was no permission denied error
while writing to error logs). 
mkcephfs is failing while trying to execute below command on node0:

ssh node0 /sbin/mkcephfs -d /tmp/mkcephfs.e3FNLexFkx --init-daemon osd.0

And it is reporting error as:

 ** ERROR: error creating empty object store in /data/osd1: error 2: No
such file or directory

Which is somewhat true since /data/osd1 only exists in node1, and not
node0. Does it means there are some error in ceph.conf. 

- Lalit



> 
> Jeff ,Wu
> 
> On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
> > Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
> > Getting errors during mk file system : http://dpaste.com/hold/549518/.
> > Any idea what's going wrong?
> > 
> > 
> > - Lalit
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Error while creating ceph cluster

[Anders Saaby]

Lalit,

I think the answer is in your ceph.conf file:

<SNIP>
[osd]
       sudo = true
       osd data = /data/osd1
[osd.0]
       host = node0
[osd.1]
       host = node1
</SNIP>

Which dictates the "/data/osd1" dir on both nodes.

You should go for something more like: "osd data = /data/osd$id" which will use osd0 on node0, osd1 on node1.


Best regards
Anders Saaby

On 02/06/2011, at 09.41, Lalit Bhasin wrote:

> On Thu, 2011-06-02 at 15:14 +0000, Jeff Wu wrote:
>> Hi ,
>> try the steps:
>> 1. use root user;
>> 2. manually create /data/osd${N} folder.
> Jeff, I ensured that /data/osd0 ( on node0) and /data/osd1 ( on node1)
> existed before shooting this command on node1. Got same error using root
> user also ( ofcourse this time there was no permission denied error
> while writing to error logs). 
> mkcephfs is failing while trying to execute below command on node0:
> 
> ssh node0 /sbin/mkcephfs -d /tmp/mkcephfs.e3FNLexFkx --init-daemon osd.0
> 
> And it is reporting error as:
> 
> ** ERROR: error creating empty object store in /data/osd1: error 2: No
> such file or directory
> 
> Which is somewhat true since /data/osd1 only exists in node1, and not
> node0. Does it means there are some error in ceph.conf. 
> 
> - Lalit
> 
> 
> 
>> 
>> Jeff ,Wu
>> 
>> On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
>>> Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
>>> Getting errors during mk file system : http://dpaste.com/hold/549518/.
>>> Any idea what's going wrong?
>>> 
>>> 
>>> - Lalit
>>> 
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Error while creating ceph cluster

[Lalit Bhasin]

On Thu, 2011-06-02 at 15:55 +0000, Jeff Wu wrote:
> Hi ,
> 
> Could you create the folder 
> node0: /data/osd0/osd0 /data/osd0/osd1
> node1: /data/osd1/osd0 /data/osd1/osd1
> 
> or
> try to modify  " osd data = /data" at your ceph.conf,
> then create /data/osd0 and /data/osd1  at your node0&&node1.
> 
> I had filed the issue at :
> 
> http://tracker.newdream.net/issues/1015
> 
> 
> but Greg Farnum added  the Comment :"
> 
> You need to create the directory yourself and this is deliberate. It
> prevents administrators from not fully setting up their cluster and
> accidentally having the OSD use the root partition when they meant to
> use a separate drive mounted at /osd."
> 
> Jeff ,Wu
> 
Thanks Jeff. This helped. I now used single ceph.conf file on both the
nodes, and used $i substitution for osd and mon, and it worked ( so
kept /data/osd1 and /data/osd0 in node1 and node0 respectively).


Subsequently file system creation worked fine, and all ceph daemons
started fine. But mount gives error as below:
--
lalitb@node0:/data/osd0$ sudo mount -t ceph 192.168.230.12:/ /ceph
[sudo] password for lalitb: 
mount error 5 = Input/output error
lalitb@node0:/data/osd0$ 
---

Where 192.168.230.12 is IP address of node0. Cannot see any error in
syslog.

- Lalit

> 
> 
> 
> 
> On Thu, 2011-06-02 at 15:41 +0800, Lalit Bhasin wrote:
> > On Thu, 2011-06-02 at 15:14 +0000, Jeff Wu wrote:
> > > Hi ,
> > > try the steps:
> > > 1. use root user;
> > > 2. manually create /data/osd${N} folder.
> > Jeff, I ensured that /data/osd0 ( on node0) and /data/osd1 ( on node1)
> > existed before shooting this command on node1. Got same error using root
> > user also ( ofcourse this time there was no permission denied error
> > while writing to error logs). 
> > mkcephfs is failing while trying to execute below command on node0:
> > 
> > ssh node0 /sbin/mkcephfs -d /tmp/mkcephfs.e3FNLexFkx --init-daemon osd.0
> > 
> > And it is reporting error as:
> > 
> >  ** ERROR: error creating empty object store in /data/osd1: error 2: No
> > such file or directory
> > 
> > Which is somewhat true since /data/osd1 only exists in node1, and not
> > node0. Does it means there are some error in ceph.conf. 
> > 
> > - Lalit
> > 
> > 
> > 
> > > 
> > > Jeff ,Wu
> > > 
> > > On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
> > > > Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
> > > > Getting errors during mk file system : http://dpaste.com/hold/549518/.
> > > > Any idea what's going wrong?
> > > > 
> > > > 
> > > > - Lalit
> > > > 
> > > > --
> > > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > > > the body of a message to majordomo@vger.kernel.org
> > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Error while creating ceph cluster

[Jeff Wu]

Hi ,
try the steps:
1. use root user;
2. manually create /data/osd${N} folder.

Jeff ,Wu

On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
> Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
> Getting errors during mk file system : http://dpaste.com/hold/549518/.
> Any idea what's going wrong?
> 
> 
> - Lalit
> 
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Error while creating ceph cluster

[Jeff Wu]

Hi ,

Could you create the folder 
node0: /data/osd0/osd0 /data/osd0/osd1
node1: /data/osd1/osd0 /data/osd1/osd1

or
try to modify  " osd data = /data" at your ceph.conf,
then create /data/osd0 and /data/osd1  at your node0&&node1.

I had filed the issue at :

http://tracker.newdream.net/issues/1015


but Greg Farnum added  the Comment :"

You need to create the directory yourself and this is deliberate. It
prevents administrators from not fully setting up their cluster and
accidentally having the OSD use the root partition when they meant to
use a separate drive mounted at /osd."

Jeff ,Wu





On Thu, 2011-06-02 at 15:41 +0800, Lalit Bhasin wrote:
> On Thu, 2011-06-02 at 15:14 +0000, Jeff Wu wrote:
> > Hi ,
> > try the steps:
> > 1. use root user;
> > 2. manually create /data/osd${N} folder.
> Jeff, I ensured that /data/osd0 ( on node0) and /data/osd1 ( on node1)
> existed before shooting this command on node1. Got same error using root
> user also ( ofcourse this time there was no permission denied error
> while writing to error logs). 
> mkcephfs is failing while trying to execute below command on node0:
> 
> ssh node0 /sbin/mkcephfs -d /tmp/mkcephfs.e3FNLexFkx --init-daemon osd.0
> 
> And it is reporting error as:
> 
>  ** ERROR: error creating empty object store in /data/osd1: error 2: No
> such file or directory
> 
> Which is somewhat true since /data/osd1 only exists in node1, and not
> node0. Does it means there are some error in ceph.conf. 
> 
> - Lalit
> 
> 
> 
> > 
> > Jeff ,Wu
> > 
> > On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
> > > Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
> > > Getting errors during mk file system : http://dpaste.com/hold/549518/.
> > > Any idea what's going wrong?
> > > 
> > > 
> > > - Lalit
> > > 
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > > the body of a message to majordomo@vger.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Error while creating ceph cluster

[Lalit Bhasin]

On Thu, 2011-06-02 at 17:33 +0530, Lalit Bhasin wrote:
> On Thu, 2011-06-02 at 15:55 +0000, Jeff Wu wrote:
> > Hi ,
> > 
> > Could you create the folder 
> > node0: /data/osd0/osd0 /data/osd0/osd1
> > node1: /data/osd1/osd0 /data/osd1/osd1
> > 
> > or
> > try to modify  " osd data = /data" at your ceph.conf,
> > then create /data/osd0 and /data/osd1  at your node0&&node1.
> > 
> > I had filed the issue at :
> > 
> > http://tracker.newdream.net/issues/1015
> > 
> > 
> > but Greg Farnum added  the Comment :"
> > 
> > You need to create the directory yourself and this is deliberate. It
> > prevents administrators from not fully setting up their cluster and
> > accidentally having the OSD use the root partition when they meant to
> > use a separate drive mounted at /osd."
> > 
> > Jeff ,Wu
> > 
> Thanks Jeff. This helped. I now used single ceph.conf file on both the
> nodes, and used $i substitution for osd and mon, and it worked ( so
> kept /data/osd1 and /data/osd0 in node1 and node0 respectively).
> 
> 
> Subsequently file system creation worked fine, and all ceph daemons
> started fine. But mount gives error as below:
> --
> lalitb@node0:/data/osd0$ sudo mount -t ceph 192.168.230.12:/ /ceph
> [sudo] password for lalitb: 
> mount error 5 = Input/output error
> lalitb@node0:/data/osd0$ 
> ---
> 
> Where 192.168.230.12 is IP address of node0. Cannot see any error in
> syslog.
> 
> - Lalit
> 

Ok, I modified ceph.conf file to create osd journal on writehead mode,
and mount was successful after this. It seems this is requirement for
non-brtfs.

- Lalit

> > 
> > 
> > 
> > 
> > On Thu, 2011-06-02 at 15:41 +0800, Lalit Bhasin wrote:
> > > On Thu, 2011-06-02 at 15:14 +0000, Jeff Wu wrote:
> > > > Hi ,
> > > > try the steps:
> > > > 1. use root user;
> > > > 2. manually create /data/osd${N} folder.
> > > Jeff, I ensured that /data/osd0 ( on node0) and /data/osd1 ( on node1)
> > > existed before shooting this command on node1. Got same error using root
> > > user also ( ofcourse this time there was no permission denied error
> > > while writing to error logs). 
> > > mkcephfs is failing while trying to execute below command on node0:
> > > 
> > > ssh node0 /sbin/mkcephfs -d /tmp/mkcephfs.e3FNLexFkx --init-daemon osd.0
> > > 
> > > And it is reporting error as:
> > > 
> > >  ** ERROR: error creating empty object store in /data/osd1: error 2: No
> > > such file or directory
> > > 
> > > Which is somewhat true since /data/osd1 only exists in node1, and not
> > > node0. Does it means there are some error in ceph.conf. 
> > > 
> > > - Lalit
> > > 
> > > 
> > > 
> > > > 
> > > > Jeff ,Wu
> > > > 
> > > > On Thu, 2011-06-02 at 14:59 +0800, Lalit Bhasin wrote:
> > > > > Guys, I am new to ceph. Trying to create a 2 node cluster setup of ceph.
> > > > > Getting errors during mk file system : http://dpaste.com/hold/549518/.
> > > > > Any idea what's going wrong?
> > > > > 
> > > > > 
> > > > > - Lalit
> > > > > 
> > > > > --
> > > > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > > > > the body of a message to majordomo@vger.kernel.org
> > > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > > 
> > > 
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > > the body of a message to majordomo@vger.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>