If you ticked the checkbox "encrypt volume" during CentOS7 installation, the Disk is encrypted on the LVM PV (Physical Volume) level by CentOS using LUKS.
Therefore you need to perform this steps to grow one of the LVM partitions:
- Increase the Partition of the disk
- Increase the PV (physical LVM Volume)
- Increase the LV (logical LVM Volume)
- Increase the file system of the partition holding your data.
Steps (example using VMWare ESXi VM):
- Increase the disk size in vCenter / ESXi for the VM (e.g from 750 GB to 800 GB). This can be done while the VM machine is up.
- Create a snapshot of the VM
- Reboot the VM
- Resize the disk partition
fdisk /dev/sda
- Print the partition table:
Command (m for help): p Disk /dev/sda: 859.0 GB, 858993459200 bytes, 1677721600 sectors <--size in GiB! Device boot. Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 1572863999 785382400 83 Linux <-- Holds the LVM vols. - Now delete the partition (not kidding):
Command (m for help): d Partition number (1,2, default 2): 2
- Re-create the partion with larger size:
Command (m for help): n Partition type: p primary (1 primary, 0 extended, 3 free) e extended Select (default p): p Partition number (2-4, default 2): 2 First sector (2099200-1677721599, default 2099200): [ENTER] Using default value 2099200 Last sector, +sectors or +size{K,M,G} (2099200-1677721599, default 1677721599): [ENTER] Using default value 1677721599 Partition 2 of type Linux and of size 799 GiB is set
- Check the partition table:
Command (m for help): p Disk /dev/sda: 859.0 GB, 858993459200 bytes, 1677721600 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000f06d8 Device Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 1677721599 837811200 83 Linux <-- New size - Write the partition table and exit:
Command (m for help): w
- Print the partition table:
- reboot
- Resize the PV (LVM Physical Volume):
- Display the PV volumes:
[root@localhost]# pvdisplay --- Physical volume --- PV Name /dev/mapper/luks-999a99b9-8a99-9abc-d999-b99bb9999bb9 VG Name cl PV Size <749,00 GiB / not usable 0 Allocatable yes PE Size 4.00 MiB Total PE 191743 Free PE 1 Allocated PE 191742 PV UUID Zu21Ve-7mx5-v4p2-bxfa-ZH2N-EbWE-WeMk3T - Resize the PV (to the maximum available)
[root@localhost]# pvresize /dev/mapper/luks-999a99b9-8a99-9abc-d999-b99bb9999bb9
Physical volume "/dev/mapper/luks-999a99b9-8a99-9abc-d999-b99bb9999bb9" changed 1 physical volume(s) resized / 0 physical volume(s) not resized - check the PV:
[root@localhost]# pvdisplay --- Physical volume --- PV Name /dev/mapper/luks-999a99b9-8a99-9abc-d999-b99bb9999bb9 VG Name cl PV Size <799,00 GiB / not usable 1,00 MiB Allocatable yes PE Size 4,00 MiB Total PE 204543 Free PE 12801 Allocated PE 191742 PV UUID Zu21Ve-7mx5-v4p2-bxfa-ZH2N-EbWE-WeMk3T
- Display the PV volumes:
- Resize LV (logical volume):
- Display the Logical volume(s):
[root@localhost]# lvdisplay ... --- Logical volume --- LV Path /dev/cl/DATA LV Name DATA2 VG Name cl LV UUID X8AAA-4aAa-Aaaa-8A8A-BbbB-bb8b-bbB8BB LV Write Access read/write LV Creation host, time localhost.localdomain, 2018-02-02 09:50:26 +0400 LV Status available # open 1 LV Size <411,12 GiB Current LE 105246 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:8 - Resize the LV:
[root@localhost]# lvresize --size +50G /dev/cl/DATA
Size of logical volume cl/DATA changed from <411,12 GiB (105246 extents) to <461,12 GiB (118046 extents). Logical volume cl/DATA successfully resized. - Check the LV partition:
[root@localhost]# lvdisplay ... --- Logical volume --- LV Path /dev/cl/DATA LV Name DATA2 VG Name cl LV UUID X8AAA-4aAa-Aaaa-8A8A-BbbB-bb8b-bbB8BB LV Write Access read/write LV Creation host, time localhost.localdomain, 2018-02-02 09:50:26 +0400 LV Status available # open 1 LV Size <461,12 GiB Current LE 118046 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:8
- Display the Logical volume(s):
- Resize file system (can be done on-the-fly without unmount if it is XFS):
[root@localhost]# xfs_growfs /dev/cl/DATA
meta-data=/dev/mapper/cl-DATA2 isize=512 agcount=4, agsize=26942976 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=107771904, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =Intern bsize=4096 blocks=52623, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =keine extsz=4096 blocks=0, rtextents=0 Datablocks changed from 107771904 to 120879104.
