[lustre-discuss] Updating mgsnode IP command completes successfully, but old IP remains

[Ricardo Brugman]

Hi all,

I’ve seen many questions/issues came by and I decided to post the issue that I encountered.

Recently I tried updating the mgsnode IP address on a lustre node and although the command executed successfully, the old IP value remained.

Old value: 10.10.10.2 (points to a server that is not a mgsnode)
New value: 10.10.10.201 at o2ib,10.10.10.202 at o2ib,10.10.10.203 at o2ib,10.10.10.204 at o2ib

Please find the command and output below:

[root at xxx ~]# tunefs.lustre --erase-param mgsnode --writeconf --mgsnode=10.10.10.201 at o2ib,10.10.10.202 at o2ib,10.10.10.203 at o2ib,10.10.10.204 at o2ib zfs_R10_nvme0-4/dne_mdt1
checking for existing Lustre data: found

   Read previous values:
Target:     neohpfs-MDT0001
Index:      1
Lustre FS:  neohpfs
Mount type: zfs
Flags:      0x1
              (MDT )
Persistent mount opts:
Parameters: mgsnode=10.10.10.2 at o2ib

   Permanent disk data:
Target:     neohpfs=MDT0001
Index:      1
Lustre FS:  neohpfs
Mount type: zfs
Flags:      0x141
              (MDT update writeconf )
Persistent mount opts:
Parameters:  mgsnode=:10.10.10.201 at o2ib,10.10.10.202 at o2ib,10.10.10.203 at o2ib,10.10.10.204 at o2ib
[root at xxx ~]#

I did restart the lustre service thinking this would perhaps load the new value/config and although the service came up successfully, it still had not loaded the new value.

Appreciate any help, suggestions you can provide as to why the new value was not saved/loaded. In case I made a mistake, or I followed the incorrect step(s)/process than please, feel free to point that out.

Best Regards,
Ricardo
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