[ClusterLabs] convert already clustered LVM to cLVM

Cristiano Coltro Cristiano.Coltro at microfocus.com
Wed Jun 28 04:46:55 EDT 2017

Hi all,

A brief History

Customer of mine has setted up a SLES 11 sp3 and SLES11sp4 HA environment and he has some LVM as resources.

When he tries to expand LVM for a "need of space" reason he wasn't able to extend cause a corruption of metadata that even if recovered with vgcfgrestore doesn't heal.

The customer has not configured LVM with the "c"( clustered ) attribute

   95   VG        #PV #LV #SN Attr   VSize   VFree
   96   vg00        1   3   0 wz--n- 279.22g  88.22g
   97   vgWP4       2  10   0 wz--n-  49.97g   5.97g

that prevents to extend the LVM and gets

83664       Setting global/locking_type to 3
83665       global/wait_for_locks not found in config: defaulting to 1
83666       Cluster locking selected.
83667     connect() failed on local socket: No such file or directory
83668     Internal cluster locking initialisation failed.
83669       Setting global/fallback_to_local_locking to 1
83670       locking/fallback_to_local_locking not found in config: defaulting to 1
83671     WARNING: Falling back to local file-based locking

Cause he has the file locking set to 3 ( correctly ) but he must have the "c" attribute to work properly.

Coming to my question:

  *   Is there a way to convert the LVMs without pain to cLVMs?  I know that technically a vgchange -cy do the trick but I'm not sure which impacts it can have.

Thanks in advance

Cristiano Coltro
Premium Support Engineer

mail: cristiano.coltro at microfocus.com<mailto:cristiano.coltro at microfocus.com>
mobile: +39 335 1435589
phone +39 02 36634936

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