Increasing SAN storage size

This article provides instructions on how to increase the size of SAN storage.

If the LUN size has been increased in the storage, the information about the storage size will not be sent to the platform automatically. To send the information:

1. On all cluster nodes:
   
   1. Perform a disk scan: 

      echo 1 > /sys/block/<device_name>/device/rescan

      Comments to the command

      <device_name> — block device names (sda, sdb, sdc, etc.)
   2. If multipath is used in the storage, perform a device map scan: 

      multipath -r

2. On one of the cluster nodes, resize the VG: 

   pvresize <device>

   Comments to the command

   <device> — block device. Possible values:

   • if multipath is used in the storage — /dev/mapper/<LUN_name>
   • if UUID is used for connection — /dev/disk/by-uuid/<device_UUID>
   • if WWID is used for connection — /dev/disk/by-id/<device_WWID>
3. On the server with the platform, update the storage information: 

   docker exec -it vm_box curl -X POST -d '{}' input:1500/vm/v3/cluster/<cluster_id>/storage/<storage_id>/check -H 'internal-auth:on'

   Comments to the command

   <cluster_id> — id of the cluster
   <storage_id> — id of the storage