New vg size added to Linux system
Recently, many friends around me asked me how to operate the new vg in Linux, and how to operate the existing vg in Linux expansion. Next, I will take you to see how we add and expand the capacity.
1. Due to limited resources
So I can only add 10G, ah~~, add a 10G data disk.
We can see it after adding the data disk. After I add it, my name is sdb.
[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 20G 0 disk ├─sda1 8:1 0 300M 0 part /boot ├─sda2 8:2 0 2G 0 part [SWAP] └─sda3 8:3 0 17.7G 0 part / sdb 8:16 0 10G 0 disk sr0 11:0 1 1024M 0 rom [root@localhost ~]# fdisk -l Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x000dad8d Device Boot Start End Blocks Id System /dev/sda1 * 2048 616447 307200 83 Linux /dev/sda2 616448 4810751 2097152 82 Linux swap / Solaris /dev/sda3 4810752 41943039 18566144 83 Linux Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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 [root@localhost ~]#
2. Create this disk PV
[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 20G 0 disk ├─sda1 8:1 0 300M 0 part /boot ├─sda2 8:2 0 2G 0 part [SWAP] └─sda3 8:3 0 17.7G 0 part / sdb 8:16 0 10G 0 disk sr0 11:0 1 1024M 0 rom [root@localhost ~]# pvcreate /dev/sdb Physical volume "/dev/sdb" successfully created. [root@localhost ~]#
3. Create this disk into VG
VG name vgdata1
[root@localhost ~]# vgcreate vgdata1 /dev/sdb Volume group "vgdata1" successfully created [root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree vgdata1 1 0 0 wz--n- <10.00g <10.00g [root@localhost ~]#
4. Create an LV
The name is Lvdata1, and after creation is completed, check it.
[root@localhost ~]# lvcreate -L 9.9G -n Lvdata1 vgdata1 Rounding up size to full physical extent 9.90 GiB Logical volume "Lvdata1" created. [root@localhost ~]# cd /dev/mapper/ [root@localhost mapper]# ls control vgdata1-Lvdata1 [root@localhost mapper]#
5. Assign it to the file system with the created vgdata1-Lvdata1
I'm not going to explain much here~~
[root@localhost ~]# mkfs.ext4 /dev/mapper/ control vgdata1-Lvdata1 [root@localhost ~]# mkfs.ext4 /dev/mapper/vgdata1-Lvdata1 mke2fs 1.42.9 (28-Dec-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 648960 inodes, 2595840 blocks 129792 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2151677952 80 block groups 32768 blocks per group, 32768 fragments per group 8112 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done [root@localhost ~]#
6. At this point, it has been completed
If you need to mount it, you can continue to read it below~~
[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 20G 0 disk ├─sda1 8:1 0 300M 0 part /boot ├─sda2 8:2 0 2G 0 part [SWAP] └─sda3 8:3 0 17.7G 0 part / sdb 8:16 0 10G 0 disk └─vgdata1-Lvdata1 253:0 0 9.9G 0 lvm sr0 11:0 1 1024M 0 rom [root@localhost ~]#
7. If you need to mount it
I'll tell you quietly that you need to create a mount path, or mount it on an existing path, and hang wherever you want according to customer needs.
Here I want to mount it in /opt/a
[root@localhost ~]# mkdir /opt/a [root@localhost ~]# ls /opt a rh [root@localhost ~]# It's already installed here， [root@localhost ~]# mount /dev/mapper/vgdata1-Lvdata1 /opt/a [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 18G 4.3G 14G 24% / devtmpfs 471M 0 471M 0% /dev tmpfs 487M 0 487M 0% /dev/shm tmpfs 487M 8.6M 478M 2% /run tmpfs 487M 0 487M 0% /sys/fs/cgroup /dev/sda1 297M 147M 151M 50% /boot tmpfs 98M 20K 98M 1% /run/user/1000 tmpfs 98M 0 98M 0% /run/user/0 /dev/mapper/vgdata1-Lvdata1 9.7G 37M 9.1G 1% /opt/a [root@localhost ~]#
Summarize
The above is personal experience. I hope you can give you a reference and I hope you can support me more.