大数据迁移之DRBD扩容

扩容主/备物理数据盘：

[root@MySQL02 ~]# drbdadm down data

[root@MySQL02 ~]# mount /dev/sdb1 /mnt/

[root@MySQL02 ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/sda3 7.2G 1.9G 5.0G 28% /

tmpfs 242M 0 242M 0% /dev/shm

/dev/sda1 194M 57M 128M 31% /boot

/dev/sdb1 380M 11M 350M 3% /mnt # 可以看到备节点磁盘利用率只有380M

[root@MySQL02 ~]# parted /dev/sdb p

Model: Msft Virtual Disk (scsi)

Disk /dev/sdb: 2147MB

Sector size (logical/physical): 512B/512B

Partition Table: msdos

Number Start End Size Type File system Flags

1 32.3kB 814MB 814MB primary ext4 # 然而备节点真实大小为814M

2 814MB 979MB 165MB primary

[root@MySQL02 ~]# umount /mnt/

[root@MySQL02 ~]# e2fsck -f /dev/sdb1 # 查看分区大小

e2fsck 1.41.12 (17-May-2010)

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/sdb1: 38/100744 files (0.0% non-contiguous), 22971/401409 blocks

[root@MySQL02 ~]# resize2fs /dev/sdb1 # 重新分配分区（扩容）

resize2fs 1.41.12 (17-May-2010)

Resizing the filesystem on /dev/sdb1 to 795184 (1k) blocks.

The filesystem on /dev/sdb1 is now 795184 blocks long.