How to merge home and root partitions on Centos 7
Sometimes while provisioning server from an image causes home partition gets assigned with some partition which you don't want & yoiu want to merge root & home altogether.
Here is how you can do it:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 464.8G 0 part
sdb 8:16 0 931.5G 0 disk
sdc 8:32 0 465.8G 0 disk
├─vg2-vsv1003--d7ukx3rejw5mmq8i--q6ltarafzvxfk8nh
253:3 0 12G 0 lvm
└─vg2-vsv1004--dgxoydbojwnmbwro--wimqwmuu3ne3t9qw
253:4 0 100G 0 lvm
sdd 8:48 0 931.5G 0 disk
Firstly umount your home partition.
# umount /dev/mapper/centos_navicosoft--user-home
Then you need to remove this volume using lvremove
# lvremove /dev/mapper/centos_navicosoft--user-home
Do you really want to remove active logical volume centos_navicosoft-user/home? [y/n]: y
Logical volume "home" successfully removed
Now you should extend volume using lvextend
# lvextend -l +100%FREE -r /dev/mapper/centos_navicosoft--user-root
Size of logical volume centos_navicosoft-user/root changed from 50.00 GiB (12800 extents) to 433.32 GiB (110930 extents).
Logical volume centos_navicosoft-user/root successfully resized.
meta-data=/dev/mapper/centos_navicosoft--user-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 113592320
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos_navicosoft--user-root 434G 16G 419G 4% /
devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 32G 50M 32G 1% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/sda1 1014M 173M 842M 18% /boot
tmpfs 6.3G 0 6.3G 0% /run/user/0
