All storage volumes are configured as LVM devices. They can be resized online by providing the underlying virtualization technology to support online disk expansion. Disks are expanded automatically via cloud-init when the VM boots.
To expand disks after boot:
- Login into the SASE Orchestrator system console.
- Identify the physical disks that support the database volume.
vgs -o +devices store
Example:
root@vco:~# vgs -o +devices db_data \ VG #PV #LV #SN Attr VSize VFree Devices store 1 1 0 wz--n- 500.00g 125.00g /dev/sdb(0)
- Identify the physical disk attachment.
lshw -class volume
Example:/dev/sdb is attached to scsi@2:0.1.0 (Host: scsi2 Channel: 00 Id: 01 Lun: 00)
root@vco:~# lshw -class volume *-volume description: EXT4 volume vendor: Linux physical id: 1 bus info: scsi@2:0.0.0,1 logical name: /dev/sda1 logical name: / version: 1.0 serial: 9d212247-77c4-4f98-a5c2-7f8470fa2da8 size: 10239MiB capacity: 10239MiB capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized configuration: created=2016-02-22 20:49:38 filesystem=ext4 label=cloudimg-rootfs lastmountpoint=/ modified=2016-02-22 21:18:58 mount.fstype=ext4 mount.options=rw,relatime,data=ordered mounted=2016-10-06 23:22:04 state=mounted *-disk:1 description: SCSI Disk physical id: 0.1.0 bus info: scsi@2:0.1.0 logical name: /dev/sdb serial: v5V2zm-Lvbh-Mfx3-W8ki-COI9-DAtP-RXndhu size: 500GiB capacity: 500GiB capabilities: lvm2 configuration: sectorsize=512 *-disk:2 description: SCSI Disk physical id: 0.2.0 bus info: scsi@2:0.2.0 logical name: /dev/sdc serial: fTQFJ2-giAV-WsXL-1Wha-V305-oQkV-qqS3SA size: 100GiB capacity: 100GiB capabilities: lvm2 configuration: sectorsize=512
- On the hypervisor host, locate the disk attached to the VM using bus information. Example:
SCSI(0:1)
- Extend the virtual disk. For instructions, see https://knowledge.broadcom.com/external/article/344854.
- Re-login into the SASE Orchestrator system console.
- Re-scan the block device for the resized physical volume. Example:
echo 1 > /sys/block/$DEVICE/device/rescan
Example:
echo 1 > /sys/block/sdb/device/rescan
- Resize the LVM physical disk.
pvresize /dev/sdb
- Determine the amount of free space in the database volume group.
vgdisplay store |grep Free
Example:
root@vco:~# vgdisplay store |grep Free Free PE / Size 34560 / 135.00 GiB
- Extend the database logical volume.
lvextend -r -L+#G /dev/store/data
Example:
root@vco1:~# lvextend -r -L+1G /dev/store/data Size of logical volume store/data changed from 400.00 GiB (102400 extents) to 401.00 GiB (102656 extents). Logical volume store/data successfully resized. resize2fs 1.44.1 (24-Mar-2018) Filesystem at /dev/mapper/store-data is mounted on /store; on-line resizing required old_desc_blocks = 50, new_desc_blocks = 51 The filesystem on /dev/mapper/store-data is now 105119744 (4k) blocks long.
- View the new size of the volume.
df -h /dev/store/data
Example:
root@vco:~# df -h /dev/store/data Filesystem Size Used Avail Use% Mounted on /dev/mapper/store-data 379G 1.2G 359G 1% /store