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Re: [Linux-cluster] lvm2-cluster not syncing correctly?



Please read the warning at the end of this email
________________________________________________

> Hi,

> Are you sure the clustered bit is set on the VG?
> http://sources.redhat.com/cluster/wiki/FAQ/CLVM#clvmd_clustered

> Bob Peterson
> Red Hat File Systems

Yes, the volume group was created with vgcreate -cy, and the output of vgs shows the "c" flag: -

  VG            #PV #LV #SN Attr   VSize   VFree
  vg00            1  13   0 wz--n-  49.88G 27.16G
  vgGWPOCSHARED   1   8   0 wz--nc 199.98G 29.98G

You can see below an example using vgs and lvs to show the issue: -

Initial state: -

[root ybsxlx89 ~]# vgs ; lvs
  VG            #PV #LV #SN Attr   VSize   VFree
  vg00            1  13   0 wz--n-  49.88G 27.16G
  vgGWPOCSHARED   1  10   0 wz--nc 199.98G 27.98G
  LV              VG            Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  esmlv           vg00          -wi-ao 480.00M
  lvol1           vg00          -wi-ao   1.00G
  lvol2           vg00          -wi-ao   4.00G
  lvol3           vg00          -wi-ao   3.91G
  lvol4           vg00          -wi-ao   1.00G
  lvol5           vg00          -wi-ao   1.00G
  lvol6           vg00          -wi-ao 256.00M
  netbackuplv     vg00          -wi-ao 512.00M
  oraclelv        vg00          -wi-ao   5.00G
  tivolilv        vg00          -wi-ao  64.00M
  u001lv          vg00          -wi-ao   5.00G
  u003lv          vg00          -wi-ao 512.00M
  ybslv           vg00          -wi-ao  32.00M
  aserver         vgGWPOCSHARED -wi-a-  10.00G
  fmw1            vgGWPOCSHARED -wi-a-  50.00G
  fmw2            vgGWPOCSHARED -wi-a-  50.00G
  gwpoc_cluster   vgGWPOCSHARED -wi-a-  20.00G
  gwpoc_instance1 vgGWPOCSHARED -wi-a-  10.00G
  gwpoc_instance2 vgGWPOCSHARED -wi-a-  10.00G
  mserver1        vgGWPOCSHARED -wi-a-  10.00G
  mserver2        vgGWPOCSHARED -wi-a-  10.00G
  test            vgGWPOCSHARED -wi-a-   1.00G
  test2           vgGWPOCSHARED -wi-a-   1.00G


I next run "lvcreate -n test3 -L 1G vgGWPOCSHARED" on the other node, and then run the vgs and lvs command on this node again: -


[root ybsxlx89 ~]# vgs ; lvs
  VG            #PV #LV #SN Attr   VSize   VFree
  vg00            1  13   0 wz--n-  49.88G 27.16G
  vgGWPOCSHARED   1  10   0 wz--nc 199.98G 27.98G
  LV              VG            Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  esmlv           vg00          -wi-ao 480.00M
  lvol1           vg00          -wi-ao   1.00G
  lvol2           vg00          -wi-ao   4.00G
  lvol3           vg00          -wi-ao   3.91G
  lvol4           vg00          -wi-ao   1.00G
  lvol5           vg00          -wi-ao   1.00G
  lvol6           vg00          -wi-ao 256.00M
  netbackuplv     vg00          -wi-ao 512.00M
  oraclelv        vg00          -wi-ao   5.00G
  tivolilv        vg00          -wi-ao  64.00M
  u001lv          vg00          -wi-ao   5.00G
  u003lv          vg00          -wi-ao 512.00M
  ybslv           vg00          -wi-ao  32.00M
  aserver         vgGWPOCSHARED -wi-a-  10.00G
  fmw1            vgGWPOCSHARED -wi-a-  50.00G
  fmw2            vgGWPOCSHARED -wi-a-  50.00G
  gwpoc_cluster   vgGWPOCSHARED -wi-a-  20.00G
  gwpoc_instance1 vgGWPOCSHARED -wi-a-  10.00G
  gwpoc_instance2 vgGWPOCSHARED -wi-a-  10.00G
  mserver1        vgGWPOCSHARED -wi-a-  10.00G
  mserver2        vgGWPOCSHARED -wi-a-  10.00G
  test            vgGWPOCSHARED -wi-a-   1.00G
  test2           vgGWPOCSHARED -wi-a-   1.00G

test3 has not appeared, despite being visible in the other node on which it was created.  So I stop and start clvmd (no gfs2 filesystems mounted): -

[root ybsxlx89 ~]# service clvmd stop
Deactivating clustered VG(s):   0 logical volume(s) in volume group "vgGWPOCSHARED" now active
                                                           [  OK  ]
Signaling clvmd to exit                                    [  OK  ]
clvmd terminated                                           [  OK  ]
[root ybsxlx89 ~]# service clvmd start
Starting clvmd:
Activating VG(s):   11 logical volume(s) in volume group "vgGWPOCSHARED" now active
  13 logical volume(s) in volume group "vg00" now active
                                                           [  OK  ]

Now the test3 LV appears: -

[root ybsxlx89 ~]# vgs ; lvs
  VG            #PV #LV #SN Attr   VSize   VFree
  vg00            1  13   0 wz--n-  49.88G 27.16G
  vgGWPOCSHARED   1  11   0 wz--nc 199.98G 26.98G
  LV              VG            Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  esmlv           vg00          -wi-ao 480.00M
  lvol1           vg00          -wi-ao   1.00G
  lvol2           vg00          -wi-ao   4.00G
  lvol3           vg00          -wi-ao   3.91G
  lvol4           vg00          -wi-ao   1.00G
  lvol5           vg00          -wi-ao   1.00G
  lvol6           vg00          -wi-ao 256.00M
  netbackuplv     vg00          -wi-ao 512.00M
  oraclelv        vg00          -wi-ao   5.00G
  tivolilv        vg00          -wi-ao  64.00M
  u001lv          vg00          -wi-ao   5.00G
  u003lv          vg00          -wi-ao 512.00M
  ybslv           vg00          -wi-ao  32.00M
  aserver         vgGWPOCSHARED -wi-a-  10.00G
  fmw1            vgGWPOCSHARED -wi-a-  50.00G
  fmw2            vgGWPOCSHARED -wi-a-  50.00G
  gwpoc_cluster   vgGWPOCSHARED -wi-a-  20.00G
  gwpoc_instance1 vgGWPOCSHARED -wi-a-  10.00G
  gwpoc_instance2 vgGWPOCSHARED -wi-a-  10.00G
  mserver1        vgGWPOCSHARED -wi-a-  10.00G
  mserver2        vgGWPOCSHARED -wi-a-  10.00G
  test            vgGWPOCSHARED -wi-a-   1.00G
  test2           vgGWPOCSHARED -wi-a-   1.00G
  test3           vgGWPOCSHARED -wi-a-   1.00G

It is interesting that if I do an lvcreate on one node, then ls -l /dev/mapper/vgGWPOCSHARED* on the other node, the device mapper entry has been created, and I can therefore use it in filesystems etc.  It seems restricted to the lvm specific commands.


Simon


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