Nebulous

This page discusses various administrative tasks associated with Nebulous.

nebdiskd

nebdiskd can be restarted using the following procedure:

1. log on to ippdb00
   • ssh ippdb00
2. switch to a superuser account
   • su
3. change directories to /
   • cd /
4. restart nebdiskd
   • /etc/init.d/nebdiskd restart

Removing a host from nebulous permanently

If the RAID fails on the data partition and we lose the data from that partition, we need to do the following in the nebulous database:

1. Remove the entry in the mountedvol table (should be auto-removed by nebdiskd):
   • DELETE FROM mountedvol WHERE vol_id = XX;
2. Convert the entry in the volume table to point to a dummy location:
   • UPDATE volume SET name = 'ippNNN.0X', path = '/data/ippNNN.0X/nebulous', mountpoint = '/data/ippNNN.0X' WHERE vol_id = XX;
3. Add the new volume:
   • neb-voladd --vname ippXXX.0 --vhost ippXXX --uri file:///data/ippXXX.0/nebulous --mountpoint /data/ippXXX.0 --db nebulous --user nebulous --pass XXX
   • neb-voladm --vname ippXXX.0 --cab_id X --db nebulous --user nebulous --pass XXX
4. Test that the directories exist:
   • mkdir /data/ippNNN.0/nebulous
   • chown apache.nebulous /data/ippNNN.0/nebulous or chown --reference /data/ipp007.0/nebulous /data/ippNNN.0/nebulous
   • chmod 1775 /data/ippNNN.0/nebulous