New server created with 20GB Drive.
# fdisk -lDisk /dev/xvda: 21.5 GB, 21474836480 bytes255 heads, 63 sectors/track, 2610 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00028fed Device Boot Start End Blocks Id System/dev/xvda1 * 1 66 524288 83 LinuxPartition 1 does not end on cylinder boundary./dev/xvda2 66 2611 20446208 8e Linux LVMDisk /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes255 heads, 63 sectors/track, 130 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/mapper/centos-root: 19.9 GB, 19860029440 bytes255 heads, 63 sectors/track, 2414 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000 |
# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos -wi-ao---- 18.50g swap centos -wi-ao---- 1.00g |
Check Physical Volumes
# pvs PV VG Fmt Attr PSize PFree /dev/xvda2 centos lvm2 a-- 19.50g 0 |
Now I upgrade the cloud server
to
1024 MB RAM, 1 Core, 40 GB Disk
After upgrade…
# fdisk -lDisk /dev/xvda: 40.8 GB, 40802189312 bytes255 heads, 63 sectors/track, 4960 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00028fed Device Boot Start End Blocks Id System/dev/xvda1 * 1 66 524288 83 LinuxPartition 1 does not end on cylinder boundary./dev/xvda2 66 2611 20446208 8e Linux LVMDisk /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes255 heads, 63 sectors/track, 130 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/mapper/centos-root: 19.9 GB, 19860029440 bytes255 heads, 63 sectors/track, 2414 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000 |
# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos -wi-ao---- 18.50g swap centos -wi-ao---- 1.00g |
# pvs PV VG Fmt Attr PSize PFree /dev/xvda2 centos lvm2 a-- 19.50g 0 |
Create a new partition (n). Make it primary (p). The start and end should be the defaults provided by fdisk.
# fdisk /dev/xvdaWARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u').Command (m for help): pDisk /dev/xvda: 40.8 GB, 40802189312 bytes255 heads, 63 sectors/track, 4960 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00028fed Device Boot Start End Blocks Id System/dev/xvda1 * 1 66 524288 83 LinuxPartition 1 does not end on cylinder boundary./dev/xvda2 66 2611 20446208 8e Linux LVMCommand (m for help): nCommand action e extended p primary partition (1-4)pPartition number (1-4): 3First cylinder (2611-4960, default 2611):Using default value 2611Last cylinder, +cylinders or +size{K,M,G} (2611-4960, default 4960):Using default value 4960Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: Device or resource busy.The kernel still uses the old table. The new table will be used atthe next reboot or after you run partprobe(8) or kpartx(8) |
Reboot the VM so the kernel picks up the partition changes.
# shutdown -r now |
Check for the new partition
# fdisk -lDisk /dev/xvda: 40.8 GB, 40802189312 bytes255 heads, 63 sectors/track, 4960 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00028fed Device Boot Start End Blocks Id System/dev/xvda1 * 1 66 524288 83 LinuxPartition 1 does not end on cylinder boundary./dev/xvda2 66 2611 20446208 8e Linux LVM/dev/xvda3 2611 4960 18869680 83 LinuxDisk /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes255 heads, 63 sectors/track, 130 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/mapper/centos-root: 19.9 GB, 19860029440 bytes255 heads, 63 sectors/track, 2414 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000 |
Run “pvcreate /dev/xvda3” to make /dev/xvda3 a LVM partition.
# pvcreate /dev/xvda3 Physical volume "/dev/xvda3" successfully created |
Check for the name
# vgs VG #PV #LV #SN Attr VSize VFree centos 1 2 0 wz--n- 19.50g 0 |
Run “vgextend centos /dev/xvda3” to add /dev/xvda3 to the centos volume group.
# vgextend centos /dev/xvda3 Volume group "centos" successfully extended |
Check again…
# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos -wi-ao---- 18.50g swap centos -wi-ao---- 1.00g |
Root “lvresize -r -l +100%FREE centos/root” to resize the / partition.
# lvresize -r -l +100%FREE centos/root Size of logical volume centos/root changed from 18.50 GiB (4735 extents) to 36.49 GiB (9341 extents). Logical volume root successfully resizedresize2fs 1.41.12 (17-May-2010)Filesystem at /dev/mapper/centos-root is mounted on /; on-line resizing requiredold desc_blocks = 2, new_desc_blocks = 3Performing an on-line resize of /dev/mapper/centos-root to 9565184 (4k) blocks.The filesystem on /dev/mapper/centos-root is now 9565184 blocks long. |
Run “df -H”. You should now see 30+ GB size on the / partition.
# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/centos-root 36G 928M 34G 3% /tmpfs 496M 0 496M 0% /dev/shm/dev/xvda1 504M 62M 417M 13% /boot |
And fdisk again
# fdisk -lDisk /dev/xvda: 40.8 GB, 40802189312 bytes255 heads, 63 sectors/track, 4960 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00028fed Device Boot Start End Blocks Id System/dev/xvda1 * 1 66 524288 83 LinuxPartition 1 does not end on cylinder boundary./dev/xvda2 66 2611 20446208 8e Linux LVM/dev/xvda3 2611 4960 18869680 83 LinuxDisk /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes255 heads, 63 sectors/track, 130 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000Disk /dev/mapper/centos-root: 39.2 GB, 39178993664 bytes255 heads, 63 sectors/track, 4763 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000 |