部署蓝鲸平台时，镜像仓库占比容量太高，导致根分区使用100%
添加一块100G的磁盘之后，我们需要将磁盘扩容到根分区，以下是操作步骤
卸载/mnt分区，卸载之前，先备份数据
[root@base02 ~]# umount /mnt删除分区并创建新的分区
[root@base02 ~]# fdisk /dev/vdb
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): d
Selected partition 1
Partition 1 is deletedCommand (m for help): n
Partition type:p primary (0 primary, 0 extended, 4 free)e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-209715199, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):
Using default value 209715199
Partition 1 of type Linux and of size 100 GiB is setCommand (m for help): w
The partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.
[root@base02 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 54G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 53G 0 part ├─centos-root 253:0 0 33G 0 lvm /└─centos-swap 253:1 0 20G 0 lvm [SWAP]
vdb 252:16 0 100G 0 disk
└─vdb1 252:17 0 100G 0 part #格式化新分区
[root@base02 ~]# mkfs.ext4 /dev/vdb1
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
6553600 inodes, 26214144 blocks
1310707 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2174746624
800 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done 挂载/dev/vdb1到/mnt下
[root@base02 ~]# mount /dev/vdb1 /mnt[root@base02 ~]# vim /etc/fstab
[root@base02 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 7.8G 40K 100% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 33G 7.8G 26G 24% /
/dev/vda1 1014M 189M 826M 19% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
/dev/vdb1 99G 61M 94G 1% /mnt[root@base02 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 7.8G 40K 100% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 33G 7.8G 26G 24% /
/dev/vda1 1014M 189M 826M 19% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
/dev/vdb1 99G 61M 94G 1% /mnt将空间重新分配给卷组
[root@base02 data]# pvcreate /dev/vdb1
WARNING: ext4 signature detected on /dev/vdb1 at offset 1080. Wipe it? [y/n]: yWiping ext4 signature on /dev/vdb1.Physical volume "/dev/vdb1" successfully created.
[root@base02 data]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 54G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 53G 0 part ├─centos-root 253:0 0 33G 0 lvm /└─centos-swap 253:1 0 20G 0 lvm [SWAP]
vdb 252:16 0 100G 0 disk
└─vdb1 252:17 0 100G 0 part
[root@base02 data]# vgextend centos /dev/vdb1Volume group "centos" successfully extended扩展根逻辑卷的大小
[root@base02 data]# lvextend -L +94G /dev/mapper/centos-rootSize of logical volume centos/root changed from <33.00 GiB (8447 extents) to <127.00 GiB (32511 extents).Logical volume centos/root successfully resized.调整文件系统大小已使用新的空间
[root@base02 data]# resize2fs /dev/mapper/centos-root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.
[root@base02 data]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 7.8G 72K 100% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 33G 7.8G 26G 24% /
/dev/vda1 1014M 189M 826M 19% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
[root@base02 data]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 54G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 53G 0 part ├─centos-root 253:0 0 127G 0 lvm /└─centos-swap 253:1 0 20G 0 lvm [SWAP]
vdb 252:16 0 100G 0 disk
└─vdb1 252:17 0 100G 0 part └─centos-root 253:0 0 127G 0 lvm /检查根分区文件类型
[root@base02 data]# df -T / | awk '{print $2}' | tail -1
xfs
使用xfs_growfs /扩展文件系统
[root@base02 data]# xfs_growfs /
meta-data=/dev/mapper/centos-root isize=512 agcount=15, agsize=589568 blks= sectsz=512 attr=2, projid32bit=1= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=8649728, imaxpct=25= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 8649728 to 33291264扩容完成
[root@base02 data]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 7.8G 72K 100% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/centos-root 127G 7.8G 120G 7% /
/dev/vda1 1014M 189M 826M 19% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
