对新增加的硬盘进行分区
[root@vnode1 ~]# fdisk /dev/sda欢迎使用 fdisk (util-linux 2.23.2)。更改将停留在内存中,直到您决定将更改写入磁盘。使用写入命令前请三思。命令(输入 m 获取帮助):p.... 设备 Boot Start End Blocks Id System/dev/sda1 * 2048 1026047 512000 83 Linux/dev/sda2 1026048 83886079 41430016 8e Linux LVM命令(输入 m 获取帮助):nPartition type: p primary (2 primary, 0 extended, 2 free) e extendedSelect (default p): p分区号 (3,4,默认 3):3起始 扇区 (83886080-167772159,默认为 83886080):将使用默认值 83886080Last 扇区, +扇区 or +size{K,M,G} (83886080-167772159,默认为 167772159):将使用默认值 167772159分区 3 已设置为 Linux 类型,大小设为 40 GiB命令(输入 m 获取帮助):t分区号 (1-3,默认 3):3Hex 代码(输入 L 列出所有代码):8e已将分区“Linux”的类型更改为“Linux LVM”命令(输入 m 获取帮助):wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.The kernel still uses the old table. The new table will be used atthe next reboot or after you run partprobe(8) or kpartx(8)正在同步磁盘
重启机器
对新增加的硬盘格式化
[root@vnode1 ~]# mkfs.ext3 /dev/sda3mke2fs 1.42.9 (28-Dec-2013)文件系统标签=OS type: Linux块大小=4096 (log=2)分块大小=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks2621440 inodes, 10485760 blocks524288 blocks (5.00%) reserved for the super user第一个数据块=0Maximum filesystem blocks=4294967296320 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624Allocating group tables: 完成 正在写入inode表: 完成 Creating journal (32768 blocks): 完成Writing superblocks and filesystem accounting information: 完成
添加新LVM到已有的LVM组,实现扩容
[root@vnode1 ~]# lvmlvm> pvcreate /dev/sda3WARNING: ext3 signature detected on /dev/sda3 at offset 1080. Wipe it? [y/n]: y Wiping ext3 signature on /dev/sda3. Physical volume "/dev/sda3" successfully createdlvm> vgextend centos /dev/sda3 Volume group "centos" successfully extendedlvm> lvextend -L +39.9G /dev/mapper/centos-root Rounding size to boundary between physical extents: 39.90 GiB Size of logical volume centos/root changed from 35.47 GiB (9080 extents) to 75.37 GiB (19295 extents). Logical volume root successfully resized.lvm> pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name centos PV Size 39.51 GiB / not usable 3.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 10114 Free PE 0 Allocated PE 10114 PV UUID vtNvX3-b1yw-ePoh-YGHQ-tDhL-x0ru-mfts3k --- Physical volume --- PV Name /dev/sda3 VG Name centos PV Size 40.00 GiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 10239 Free PE 34 Allocated PE 10205 PV UUID jWqvcF-R53u-ZeAy-zO2L-PbtI-51VP-yHNZ1glvm> quit Exiting.[root@vnode1 ~]#
因为我的centos7的某些分区用的是xfs的文件系统
[root@vnode1 ~]# df -T文件系统 类型 1K-块 已用 可用 已用% 挂载点/dev/mapper/centos-root xfs 37173520 5574340 31599180 15% /devtmpfs devtmpfs 3987400 0 3987400 0% /devtmpfs tmpfs 3997856 0 3997856 0% /dev/shmtmpfs tmpfs 3997856 8628 3989228 1% /runtmpfs tmpfs 3997856 0 3997856 0% /sys/fs/cgroup/dev/sda1 xfs 508588 127152 381436 26% /boottmpfs tmpfs 799572 0 799572 0% /run/user/0[root@vnode1 ~]#
xfs_growfs
[root@vnode1 ~]# xfs_growfs /dev/mapper/centos-rootmeta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=2324480 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0data = bsize=4096 blocks=9297920, imaxpct=25 = sunit=0 swidth=0 blksnaming =version 2 bsize=4096 ascii-ci=0 ftype=0log =internal bsize=4096 blocks=4540, version=2 = sectsz=512 sunit=0 blks, lazy-count=1realtime =none extsz=4096 blocks=0, rtextents=0data blocks changed from 9297920 to 19758080
看到扩容后的磁盘空间
[root@vnode1 ~]# df -h文件系统 容量 已用 可用 已用% 挂载点/dev/mapper/centos-root 76G 5.4G 71G 8% /devtmpfs 3.9G 0 3.9G 0% /devtmpfs 3.9G 0 3.9G 0% /dev/shmtmpfs 3.9G 8.5M 3.9G 1% /runtmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup/dev/sda1 497M 125M 373M 26% /boottmpfs 781M 0 781M 0% /run/user/0