CentOS7 LVM磁盘扩容
1：创建磁盘分区（注意红色命令部分）
[root@hongyin-test-1 ~]# fdisk /dev/sda 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): m Command action a toggle a bootable flag b edit bsd disklabel c toggle the dos compatibility flag d delete a partition g create a new empty GPT partition table G create an IRIX (SGI) partition table l list known partition types m print this menu n add a new partition o create a new empty DOS partition table p print the partition table q quit without saving changes s create a new empty Sun disklabel t change a partition's system id u change display/entry units v verify the partition table w write table to disk and exit x extra functionality (experts only) Command (m for help): n Partition type: p primary (3 primary, 0 extended, 1 free) e extended Select (default e): p Selected partition 4 First sector (251658240-293601279, default 251658240): Using default value 251658240 Last sector, +sectors or +size{K,M,G} (251658240-293601279, default 293601279): Using default value 293601279 Partition 4 of type Linux and of size 20 GiB is set Command (m for help): t Partition number (1-4, default 4): Hex code (type L to list all codes): L 0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris 1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT- 2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT- 3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT- 4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx 5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data 6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / . 7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility 8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt 9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/ 10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b 11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor 12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor 14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary 16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS 17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE 18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto 1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep 1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT 1e Hidden W95 FAT1 80 Old Minix Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM' Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks.
2：重新加载分区表
[root@hongyin-test-1 ~]# partprobe
3：查看新建的分区sda4
[root@hongyin-test-1 ~]# fdisk -l Disk /dev/sda: 150.3 GB, 150323855360 bytes, 293601280 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: 0x000b2e61 Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 41943039 20458496 8e Linux LVM /dev/sda3 41943040 251658239 104857600 8e Linux LVM /dev/sda4 251658240 293601279 20971520 8e Linux LVM Disk /dev/mapper/centos-root: 126.2 GB, 126168858624 bytes, 246423552 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 /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 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
4： 初始化物理卷
[root@hongyin-test-1 ~]# pvcreate /dev/sda4 Physical volume "/dev/sda4" successfully created
5： 查看卷组
[root@hongyin-test-1 ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 5 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 119.50 GiB PE Size 4.00 MiB Total PE 30593 Alloc PE / Size 30593 / 119.50 GiB Free PE / Size 0 / 0 VG UUID RS3QPD-QV32-zaC9-gnx7-vcfj-Eg5a-G01NoW
6： 把新建的物理卷加到需要扩展的卷组
[root@hongyin-test-1 ~]# vgextend centos /dev/sda4 Volume group "centos" successfully extended
7： 查看逻辑卷
[root@hongyin-test-1 ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID rVqhOK-1Qqp-2yRM-82t6-QR26-8SQQ-4mnefZ LV Write Access read/write LV Creation host, time localhost, 2016-11-02 19:41:32 +0800 LV Status available # open 1 LV Size 117.50 GiB Current LE 30081 Segments 3 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID TWOjFe-dRbI-V5je-TJrM-U2Zr-8kZ4-FHmyZC LV Write Access read/write LV Creation host, time localhost, 2016-11-02 19:41:33 +0800 LV Status available # open 2 LV Size 2.00 GiB Current LE 512 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1
8： 扩展逻辑卷
[root@hongyin-test-1 ~]# lvextend -l +100%FREE /dev/centos/root Size of logical volume centos/root changed from 117.50 GiB (30081 extents) to 137.50 GiB (35200 extents). Logical volume root successfully resized.
9： 格式化文件系统
[root@hongyin-test-1 ~]# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=256 agcount=27, agsize=1144832 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=30802944, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 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 30802944 to 36044800
