LVM添加硬盘并扩容至已有分区

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LVM添加硬盘

新增一块硬盘，大小为200G，如下：

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# lsblk NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT fd0               2:0    1    4K  0 disk sda               8:0    0   40G  0 disk ├─sda1            8:1    0    1G  0 part /boot └─sda2            8:2    0   39G  0 part   ├─centos-root 253:0    0   37G  0 lvm  /   └─centos-swap 253:1    0    2G  0 lvm  [SWAP] sdb               8:16   0  200G  0 disk sr0              11:0    1 1024M  0 rom

分区

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# fdisk /dev/sdb        #执行此命令，进行分区 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.   Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0xdf09eb6a.   Command (m for help): p   #在此输入p   Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 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: 0xdf09eb6a       Device Boot      Start         End      Blocks   Id  System   Command (m for help): n   #在此输入n Partition type:     p   primary (0 primary, 0 extended, 4 free)     e   extended Select (default p): p Partition number (1-4, default 1): 1    #在此输入1 First sector (2048-419430399, default 2048):       #回车 Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-419430399, default 419430399):     #回车 Using default value 419430399 Partition 1 of type Linux and of size 200 GiB is set   Command (m for help): t   #在此输入t Selected partition 1 Hex code (type L to list all codes): L     #在此输入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      #输入lvm类型的hex代码 Changed type of partition 'Linux' to 'Linux LVM'   Command (m for help): p    #在此输入p   Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 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: 0xdf09eb6a       Device Boot      Start         End      Blocks   Id  System /dev/sdb1            2048   419430399   209714176   8e  Linux LVM   Command (m for help): w     #保存 The partition table has been altered!   Calling ioctl() to re-read partition table. Syncing disks.

创建物理卷PV

查看是否以分好区

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# lsblk NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT fd0               2:0    1    4K  0 disk sda               8:0    0   40G  0 disk ├─sda1            8:1    0    1G  0 part /boot └─sda2            8:2    0   39G  0 part   ├─centos-root 253:0    0   37G  0 lvm  /   └─centos-swap 253:1    0    2G  0 lvm  [SWAP] sdb               8:16   0  200G  0 disk └─sdb1            8:17   0  200G  0 part sr0              11:0    1 1024M  0 rom

创建物理卷

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1 2	# pvcreate /dev/sdb1   Physical volume "/dev/sdb1" successfully created.

查看物理卷创建情况

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# pvdisplay   --- Physical volume ---   PV Name               /dev/sda2   VG Name               centos   PV Size               <39.00 GiB / not usable 3.00 MiB   Allocatable           yes   PE Size               4.00 MiB   Total PE              9983   Free PE               1   Allocated PE          9982   PV UUID               jYS4Ia-7Hy9-2r9n-QGqg-Uw2I-B8D7-mQLcoR         "/dev/sdb1" is a new physical volume of "<200.00 GiB"   --- NEW Physical volume ---   PV Name               /dev/sdb1      #这里是我们刚创建的物理卷   VG Name                 PV Size               <200.00 GiB   Allocatable           NO   PE Size               0     Total PE              0   Free PE               0   Allocated PE          0   PV UUID               NGD0Ox-9ezO-vXk2-xlgo-VuqM-be8n-LBVxtj

将物理卷PV加入卷组VG

查看卷组情况

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# vgdisplay   --- Volume group ---   VG Name               centos    #卷组的名称   System ID               Format                lvm2   Metadata Areas        1   Metadata Sequence No  3   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                1   Act PV                1   VG Size               <39.00 GiB   PE Size               4.00 MiB   Total PE              9983   Alloc PE / Size       9982 / 38.99 GiB   Free  PE / Size       1 / 4.00 MiB   VG UUID               oIgyce-IO2t-FegU-Kgvb-n2Us-6K3u-rbJCdy

将新的分区/dev/sdb1加入到卷组中，这里的卷组名为centos

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1 2	# vgextend centos /dev/sdb1   Volume group "centos" successfully extended

添加完成后再次查看卷组信息

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# vgdisplay                   --- Volume group ---   VG Name               centos   System ID               Format                lvm2   Metadata Areas        2   Metadata Sequence No  4   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               238.99 GiB     #可以看到容量已经增加了200G   PE Size               4.00 MiB   Total PE              61182   Alloc PE / Size       9982 / 38.99 GiB   Free  PE / Size       51200 / 200.00 GiB   VG UUID               oIgyce-IO2t-FegU-Kgvb-n2Us-6K3u-rbJCdy

扩容已有分区

下面是对现有分区进行逻辑卷扩容，我们这里根分区为40G，我们准备扩容根分区 查看根分区的LV路径

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# 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  8.9M  7.8G   1% /run tmpfs                    7.8G     0  7.8G   0% /sys/fs/cgroup /dev/mapper/centos-root   37G  1.7G   36G   5% / /dev/sda1               1014M  179M  836M  18% /boot tmpfs                    1.6G     0  1.6G   0% /run/user/0

或者通过lvdisplay一样可以查看，这里的路径为/dev/mapper/centos-root，下面进行扩容

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# lvextend -l +100%FREE /dev/mapper/centos-root   Size of logical volume centos/root changed from 36.99 GiB (9470 extents) to 236.99 GiB (60670 extents).   Logical volume centos/root successfully resized.

查看扩容后的逻辑卷大小

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# lvdisplay /dev/mapper/centos-root   --- Logical volume ---   LV Path                /dev/centos/root   LV Name                root   VG Name                centos   LV UUID                tnXHPR-Abe6-BNL4-6EdH-bgZI-UgDM-BfCHrm   LV Write Access        read/write   LV Creation host, time localhost, 2019-09-23 17:31:21 +0800   LV Status              available   # open                 1   LV Size                236.99 GiB   Current LE             60670   Segments               2   Allocation             inherit   Read ahead sectors     auto   - currently set to     8192   Block device           253:0

然后使用xfs_groupfs进行在线调整xfs格式的文件系统大小

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# xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=2424320 blks           =                       sectsz=512   attr=2, projid32bit=1           =                       crc=1        finobt=0 spinodes=0 data     =                       bsize=4096   blocks=9697280, imaxpct=25           =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=1 log      =internal               bsize=4096   blocks=4735, version=2           =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 9697280 to 62126080

最后查看下根分区的大小是否扩容成功

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# 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  8.9M  7.8G   1% /run tmpfs                    7.8G     0  7.8G   0% /sys/fs/cgroup /dev/mapper/centos-root  237G  1.7G  236G   1% / /dev/sda1               1014M  179M  836M  18% /boot tmpfs                    1.6G     0  1.6G   0% /run/user/0