Re: mkcephfs regression in current master branch

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Hi Jim,

On Thu, 24 May 2012, Jim Schutt wrote:

> Hi,
> 
> In my testing I make repeated use of the "manual" mkcephfs
> sequence described in the man page:
> 
>    master# mkdir /tmp/foo
>    master# mkcephfs -c /etc/ceph/ceph.conf --prepare-monmap -d /tmp/foo
>    osdnode# mkcephfs --init-local-daemons osd -d /tmp/foo
>    mdsnode# mkcephfs --init-local-daemons mds -d /tmp/foo
>    master# mkcephfs --prepare-mon -d /tmp/foo
>    monnode# mkcephfs --init-local-daemons mon -d /tmp/foo
> 
> Using current master branch (commit ca79f45a33f9), the
> "mkcephfs --init-local-daemons osd" phase breaks like this:
> 
> 2012-05-24 13:24:06.325905 7fdcd61d4780 -1 filestore(/ram/mnt/ceph/data.osd.0)
> could not find 23c2fcde/osd_superblock/0 in index: (2) No such file or
> directory
> 2012-05-24 13:24:06.326768 7fdcd1ee2700 -1 filestore(/ram/mnt/ceph/data.osd.0)
> async snap create 'snap_1' transid 0 got (17) File exists
> os/FileStore.cc: In function 'void FileStore::sync_entry()' thread
> 7fdcd1ee2700 time 2012-05-24 13:24:06.326792
> os/FileStore.cc: 3564: FAILED assert(0 == "async snap ioctl error")
>  ceph version 0.47.1-157-gb003815
> (commit:b003815c222add8bdcf645d9ba4ef7e13f34587e)
>  1: (FileStore::sync_entry()+0x34f0) [0x68e190]
>  2: (FileStore::SyncThread::entry()+0xd) [0x6a2abd]
>  3: (Thread::_entry_func(void*)+0x1b9) [0x803499]
>  4: (()+0x77f1) [0x7fdcd58637f1]
>  5: (clone()+0x6d) [0x7fdcd4cb4ccd]
>  NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to
> interpret this.
> 2012-05-24 13:24:06.327991 7fdcd1ee2700 -1 os/FileStore.cc: In function 'void
> FileStore::sync_entry()' thread 7fdcd1ee2700 time 2012-05-24 13:24:06.326792
> os/FileStore.cc: 3564: FAILED assert(0 == "async snap ioctl error")

I just pushed a fix for this to master.

BTW, the real change happening with these patches is that --mkfs no longer 
clobbers existing data.  If you want to wipe out an osd and start anew, 
you need to rm -r (and btrfs sub delete snap_* and current), or re-run 
mkfs.btrfs.

Thanks for the report!

sage



> 
> FWIW, with commit 598dea12411 (filestore: mkfs: only
> create snap_0 if we created current_op_seq) reverted,
> I am able to create a new filesystem using the above
> sequence, and a typical "mkcephfs --init-local-daemons osd"
> looks like this:
> 
> 2012-05-24 13:06:25.918663 7fe7ac829780 -1 filestore(/ram/mnt/ceph/data.osd.0)
> could not find 23c2fcde/osd_superblock/0 in index: (2) No such file or
> directory
> 2012-05-24 13:06:26.301738 7fe7ac829780 -1 created object store
> /ram/mnt/ceph/data.osd.0 journal /dev/mapper/cs32s01p2 for osd.0 fsid
> f8cc9fa2-a300-45a1-ae6d-e0c0ef418d0f
> creating private key for osd.0 keyring /mnt/ceph/misc.osd.0/keyring.osd.0
> creating /mnt/ceph/misc.osd.0/keyring.osd.0
> 
> Thanks -- Jim
> 
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