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系统目录扩容
系统目录扩容
前提：机器的之前就是在LVM上创建的系统。如果不是的话，就不能进行动态扩容，可采用挂载到指定目录的方式。若想移除，则考虑新加一块硬盘进行数据迁移，确保数据安全迁移之后再进行移除。
- 查看初始磁盘状态
(base) [root@automlgpu1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 222G 0 part ├─centos-root 253:0 0 100G 0 lvm /├─centos-swap 253:1 0 4G 0 lvm └─centos-home 253:2 0 118G 0 lvm /home
sdb 8:16 0 223G 0 disk
sdc 8:32 0 3.7T 0 disk
sdd 8:48 0 14.9G 0 disk
- 需要扩容的硬盘超过2T需要更改为gpt分区，否则会发现超出的空间用不到。不超过直接可以不用这步跳过。
(base) [root@automlgpu1 ~]# parted /dev/sdc
GNU Parted 3.1
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted)
#(parted) mklabel gpt
Warning: The existing disk label on /dev/sdc will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? yes
#(parted) mkpart primary 0% 100%
(parted)
#(parted) p
Model: DELL PERC H330 Adp (scsi)
Disk /dev/sdc: 4000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: Number Start End Size File system Name Flags1 1049kB 4000GB 4000GB ext4 primary#(parted) q
Information: You may need to update /etc/fstab.
- 更改分区格式为lvm
(base) [root@automlgpu1 ~]# fdisk /dev/sdc
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
Welcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
#Command (m for help): t
#Partition type (type L to list all types): 31
#Command (m for help): pDisk /dev/sdc: 4000.2 GB, 4000225165312 bytes, 7812939776 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: gpt
Disk identifier: 55202227-561A-4085-8A48-AF2DBF0CAAB5Start End Size Type Name1 2048 7812937727 3.7T Microsoft basic primary#Command (m for help): pDisk /dev/sdc: 4000.2 GB, 4000225165312 bytes, 7812939776 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: gpt
Disk identifier: 55202227-561A-4085-8A48-AF2DBF0CAAB5# Start End Size Type Name1 2048 7812937727 3.7T Linux LVM primary#Command (m for help): w
The partition table has been altered!- 不用格式化分区，直接加入vg组，vg会自动帮格式化成他需要的格式
(base) [root@automlgpu1 ~]# vgextend centos /dev/sdc1
#WARNING: ext4 signature detected on /dev/sdc1 at offset 1080. Wipe it? [y/n]: yWiping ext4 signature on /dev/sdc1.Physical volume "/dev/sdc1" successfully created.Volume group "centos" successfully extended- 为相应的挂载点去提升容量
(base) [root@automlgpu1 /]# lvextend -L +1.6t -r /dev/centos/root
(base) [root@automlgpu1 /]# lvextend -L +2t -r /dev/centos/home
- 完成结果
(base) [root@automlgpu1 /]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 223G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 222G 0 part ├─centos-root 253:0 0 1.7T 0 lvm /├─centos-swap 253:1 0 4G 0 lvm └─centos-home 253:2 0 2.2T 0 lvm /home
sdb 8:16 0 223G 0 disk
sdc 8:32 0 3.7T 0 disk
└─sdc1 8:33 0 3.7T 0 part ├─centos-root 253:0 0 1.7T 0 lvm /└─centos-home 253:2 0 2.2T 0 lvm /home
sdd 8:48 0 14.9G 0 disk (base) [root@automlgpu1 /]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 1.7T 73G 1.6T 5% /
devtmpfs 47G 0 47G 0% /dev
tmpfs 47G 156K 47G 1% /dev/shm
tmpfs 47G 969M 46G 3% /run
tmpfs 47G 0 47G 0% /sys/fs/cgroup
/dev/sda1 1014M 182M 833M 18% /boot
/dev/mapper/centos-home 2.2T 47G 2.0T 3% /home
tmpfs 9.3G 12K 9.3G 1% /run/user/42
tmpfs 9.3G 0 9.3G 0% /run/user/0
overlay 1.7T 73G 1.6T 5% /data/dockerdata/overlay2/710d394cf386ff88857daceb09baf2c64311ce5fdd160e38c17b394390a6bb05/merged
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