逻辑卷建增删移

创建逻辑卷:
 #用sdb1和sdd组合创建逻辑卷:
    [root@localhost ~]#lsblk
    NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
    sda      8:0    0  200G  0 disk
    ├─sda1   8:1    0    1G  0 part /boot
    ├─sda2   8:2    0  100G  0 part /
    ├─sda3   8:3    0   50G  0 part /data
    ├─sda4   8:4    0    1K  0 part
    └─sda5   8:5    0    4G  0 part [SWAP]
    sdb      8:16   0   20G  0 disk
    └─sdb1   8:17   0    8G  0 part
    sdc      8:32   0   30G  0 disk
    sdd      8:48   0    2G  0 disk
    sr0     11:0    1  6.7G  0 rom  /run/media/root/CentOS-8-BaseOS-x86_64
    1.在新的硬盘创建主分区
    [root@localhost ~]#fdisk /dev/sdb

    Welcome to fdisk (util-linux 2.32.1).
    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.
    Created a new DOS disklabel with disk identifier 0x5b571c7b.

    Command (m for help): n
    Partition type
    p   primary (0 primary, 0 extended, 4 free)
    e   extended (container for logical partitions)
    Select (default p): p
    Partition number (1-4, default 1):
    First sector (2048-41943039, default 2048):
    Last sector, +sectors or +size{K,M,G,T,P} (2048-41943039, default 41943039): +8G

    Created a new partition 1 of type 'Linux' and of size 8 GiB.

    Command (m for help): w
    The partition table has been altered.
    Calling ioctl() to re-read partition table.
    Syncing disks.

 2.修改新建分区类型:改正8eLVM逻辑卷管理器
    [root@localhost ~]#fdisk /dev/sdb

    Welcome to fdisk (util-linux 2.32.1).
    Changes will remain in memory only, until you decide to write them.
    Be careful before using the write command.

    Command (m for help): t
    Selected partition 1
    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 or  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 ea  Rufus alignment
    e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         eb  BeOS fs        
    f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ee  GPT            
    10  OPUS            55  EZ-Drive        a7  NeXTSTEP        ef  EFI (FAT-12/16/
    11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f0  Linux/PA-RISC b
    12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f1  SpeedStor      
    14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f4  SpeedStor      
    16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      f2  DOS secondary  
    17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fb  VMware VMFS    
    18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fc  VMware VMKCORE
    1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fd  Linux raid auto
    1c  Hidden W95 FAT3 75  PC/IX           bc  Acronis FAT32 L fe  LANstep        
    1e  Hidden W95 FAT1 80  Old Minix       be  Solaris boot    ff  BBT            
    Hex code (type L to list all codes): 8e
    Changed type of partition 'Linux' to 'Linux LVM'.

    Command (m for help): p
    Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
    Disklabel type: dos
    Disk identifier: 0x5b571c7b

    Device     Boot Start      End  Sectors Size Id Type
    /dev/sdb1        2048 16779263 16777216   8G 8e Linux LVM

    Command (m for help): w
    The partition table has been altered.
    Syncing disks.

 3.查询修改结果:
    [root@localhost ~]#fdisk -l /dev/sdb
    Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
    Disklabel type: dos
    Disk identifier: 0x5b571c7b

    Device     Boot Start      End  Sectors Size Id Type
    /dev/sdb1        2048 16779263 16777216   8G 8e Linux LVM

 4.查询当前是否有物理卷(2个命令皆可查):
    [root@localhost ~]#pvs
    [root@localhost ~]#pvdisplay

 5.创建物理卷:
    [root@localhost ~]#pvcreate /dev/sdb1 /dev/sdd
    Physical volume "/dev/sdb1" successfully created.
    Physical volume "/dev/sdd" successfully created.

 6.查询创建结果
    [root@localhost ~]#pvs
    PV         VG Fmt  Attr PSize PFree
    /dev/sdb1     lvm2 ---  8.00g 8.00g
    /dev/sdd      lvm2 ---  2.00g 2.00g

 7.查询逻辑卷组
    [root@localhost ~]#vgs

 8.创建逻辑卷组:设置PE大小,命名,物理卷组合(成员)
    [root@localhost ~]#vgcreate -s 16M vg0 /dev/sd{b1,d}
    Volume group "vg0" successfully created

 9.查询创建结果
    [root@localhost ~]#pvs
    PV         VG  Fmt  Attr PSize PFree
    /dev/sdb1  vg0 lvm2 a--  7.98g 7.98g
    /dev/sdd   vg0 lvm2 a--  1.98g 1.98g

 10.卷组信息
    [root@localhost ~]#pvdisplay
    --- Physical volume ---
    PV Name               /dev/sdb1
    VG Name               vg0
    PV Size               8.00 GiB / not usable 16.00 MiB
    Allocatable           yes
    PE Size               16.00 MiB
    Total PE              511
    Free PE               511
    Allocated PE          0
    PV UUID               BdyFU4-vdBF-Dnnl-5HN9-69xe-LPwt-9I30Yj
    
    --- Physical volume ---
    PV Name               /dev/sdd
    VG Name               vg0
    PV Size               2.00 GiB / not usable 16.00 MiB
    Allocatable           yes
    PE Size               16.00 MiB
    Total PE              127
    Free PE               127
    Allocated PE          0
    PV UUID               e798Og-LfUf-tFp4-nRhW-8nzf-snLV-OY0fRJ

 11.创建逻辑卷,命名,大小(不能超过物理卷总容量),那个卷组,
    [root@localhost ~]#lvcreate -n mysql -L 9G vg0
    Logical volume "mysql" created.
    [root@localhost ~]#lsblk
    NAME          MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
    sda             8:0    0  200G  0 disk
    ├─sda1          8:1    0    1G  0 part /boot
    ├─sda2          8:2    0  100G  0 part /
    ├─sda3          8:3    0   50G  0 part /data
    ├─sda4          8:4    0    1K  0 part
    └─sda5          8:5    0    4G  0 part [SWAP]
    sdb             8:16   0   20G  0 disk
    └─sdb1          8:17   0    8G  0 part
    └─vg0-mysql 253:0    0    9G  0 lvm  
    sdc             8:32   0   30G  0 disk
    sdd             8:48   0    2G  0 disk
    └─vg0-mysql   253:0    0    9G  0 lvm  
    sr0            11:0    1  6.7G  0 rom  /run/media/root/CentOS-8-BaseOS-x86_64

 12.查询逻辑卷组信息
    [root@localhost ~]#lvs
    LV    VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
    mysql vg0 -wi-a----- 9.00g  

 13.创建文件系统:
   [root@localhost ~]#mkfs.ext4 /dev/vg0/mysql
   mke2fs 1.44.3 (10-July-2018)
   Creating filesystem with 2359296 4k blocks and 589824 inodes
   Filesystem UUID: 8ea3d17f-a1ff-4ba2-9175-84fc53d37739
   Superblock backups stored on blocks:
      32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

   Allocating group tables: done                            
   Writing inode tables: done                            
   Creating journal (16384 blocks): done
   Writing superblocks and filesystem accounting information: done

   [root@localhost ~]#blkid
   /dev/sda1: UUID="70654bd2-8b84-4718-86da-a46fc5534b4b" TYPE="ext4" PARTUUID="9a414237-01"
   /dev/sda2: UUID="df86e679-8d53-41a5-bd87-81d2b39fca58" TYPE="xfs" PARTUUID="9a414237-02"
   /dev/sda3: UUID="e734b75b-ce88-4daf-821f-7863e3b91e48" TYPE="xfs" PARTUUID="9a414237-03"
   /dev/sda5: UUID="039fbe3a-117b-4998-9d95-cfba038fe9f2" TYPE="swap" PARTUUID="9a414237-05"
   /dev/sr0: UUID="2019-08-15-21-52-52-00" LABEL="CentOS-8-BaseOS-x86_64" TYPE="iso9660" PTUUID="3e04f576" PTTYPE="dos"
   /dev/sdb1: UUID="BdyFU4-vdBF-Dnnl-5HN9-69xe-LPwt-9I30Yj" TYPE="LVM2_member" PARTUUID="5b571c7b-01"
   /dev/sdd: UUID="e798Og-LfUf-tFp4-nRhW-8nzf-snLV-OY0fRJ" TYPE="LVM2_member"
   /dev/mapper/vg0-mysql: UUID="8ea3d17f-a1ff-4ba2-9175-84fc53d37739" TYPE="ext4"

挂载逻辑卷
   [root@localhost ~]#vim /etc/fstab
   # /etc/fstab
   # Created by anaconda on Sun Oct  6 00:18:58 2019
   #
   # Accessible filesystems, by reference, are maintained under '/dev/disk/'.
   # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
   #
   # After editing this file, run 'systemctl daemon-reload' to update systemd
   # units generated from this file.
   #
   UUID=df86e679-8d53-41a5-bd87-81d2b39fca58 /                       xfs     defaults        0 0
   UUID=70654bd2-8b84-4718-86da-a46fc5534b4b /boot                   ext4    defaults        1 2
   UUID=e734b75b-ce88-4daf-821f-7863e3b91e48 /data                   xfs     defaults        0 0
   UUID=039fbe3a-117b-4998-9d95-cfba038fe9f2 swap                    swap    defaults        0 0
   UUID=8ea3d17f-a1ff-4ba2-9175-84fc53d37739 /mnt/mysql              ext4    defaults        0 0

   更新挂载:
   [root@localhost mnt]#mount -a

   查询挂载结果:
   [root@localhost mnt]#df -T
   Filesystem            Type     1K-blocks    Used Available Use% Mounted on
   devtmpfs              devtmpfs    992140       0    992140   0% /dev
   tmpfs                 tmpfs      1006652       0   1006652   0% /dev/shm
   tmpfs                 tmpfs      1006652    9816    996836   1% /run
   tmpfs                 tmpfs      1006652       0   1006652   0% /sys/fs/cgroup
   /dev/sda2             xfs      104806400 4670984 100135416   5% /
   /dev/sda3             xfs       52403200  398576  52004624   1% /data
   /dev/sda1             ext4        999320  115952    814556  13% /boot
   tmpfs                 tmpfs       201328      28    201300   1% /run/user/42
   tmpfs                 tmpfs       201328    2348    198980   2% /run/user/0
   /dev/sr0              iso9660    6967726 6967726         0 100% /run/media/root/CentOS-8-BaseOS-x86_64
   /dev/mapper/vg0-mysql ext4       9223508   36888   8698380   1% /mnt/mysql

扩展逻辑卷(ext4分区格式):

   查看逻辑卷剩余空间(Free PE/Szie):
   [root@localhost ~]#vgdisplay
   --- Volume group ---
   VG Name               vg0
   System ID             
   Format                lvm2
   Metadata Areas        2
   Metadata Sequence No  2
   VG Access             read/write
   VG Status             resizable
   MAX LV                0
   Cur LV                1
   Open LV               1
   Max PV                0
   Cur PV                2
   Act PV                2
   VG Size               <9.97 GiB
   PE Size               16.00 MiB
   Total PE              638
   Alloc PE / Size       576 / 9.00 GiB
   Free  PE / Size       62 / 992.00 MiB
   VG UUID               daKx15-jO4l-DkhK-Dwo5-UHGe-EkYo-EpPJgA

   添加逻辑卷:
   [root@localhost ~]#lvextend -l +100%free /dev/vg0/mysql
   Size of logical volume vg0/mysql changed from 9.00 GiB (576 extents) to <9.97 GiB (638 extents).
   Logical volume vg0/mysql successfully resized.
   [root@localhost ~]#lvs
   LV    VG  Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
   mysql vg0 -wi-ao---- <9.97g

   同步新增空间与原始空间的文件系统(ext4):
   [root@localhost ~]#resize2fs /dev/vg0/mysql
   resize2fs 1.44.3 (10-July-2018)
   Filesystem at /dev/vg0/mysql is mounted on /mnt/mysql; on-line resizing required
   old_desc_blocks = 2, new_desc_blocks = 2
   The filesystem on /dev/vg0/mysql is now 2613248 (4k) blocks long.

   同步新增空间与原始空间的文件系统(xfs):
   [root@localhost ~]#xfs_growfs /mnt/binlog/
   meta-data=/dev/mapper/vg0-binlog isize=512    agcount=4, agsize=983040 blks
            =                       sectsz=512   attr=2, projid32bit=1
            =                       crc=1        finobt=1, sparse=1, rmapbt=0
            =                       reflink=1
   data     =                       bsize=4096   blocks=3932160, imaxpct=25
            =                       sunit=0      swidth=0 blks
   naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
   log      =internal log           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 3932160 to 4341760

硬盘分区ext4/xfs文件系统扩展(一步到位):
   [root@localhost ~]#lvextend -L +1G -r /dev/vg0/mysql
   Size of logical volume vg0/mysql changed from <9.97 GiB (638 extents) to <10.97 GiB (702 extents).
   Logical volume vg0/mysql successfully resized.
   resize2fs 1.44.3 (10-July-2018)
   Filesystem at /dev/mapper/vg0-mysql is mounted on /mnt/mysql; on-line resizing required
   old_desc_blocks = 2, new_desc_blocks = 2
   The filesystem on /dev/mapper/vg0-mysql is now 2875392 (4k) blocks long.

缩减逻辑卷(不能超过逻辑卷已存文件大小):
   
   取消挂载前,确保挂载分区无用户登录(相关查询命令):
   [root@localhost ~]#fuser -v /mnt/sdb1
                         USER        PID ACCESS COMMAND
    /mnt/sdb1:           root     kernel mount /mnt/sdb1
  或:[root@localhost ~]#lsof /mnt/sdb1
      COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
      bash    3130 admin  cwd    DIR   8,17       21  128 /mnt/sdb1
    踢出所有在使用该挂载点的用户:
    1.[root@localhost ~]#fuser -km /mnt/sdb1
    /mnt/sdb1:            3130c
    2.[root@localhost ~]#findmnt /mnt/sdb1
    TARGET    SOURCE    FSTYPE OPTIONS
    /mnt/sdb1 /dev/sdb1 ext4   ro,relatime,seclabel

    取消挂载的分区ext:
    umount /mnt/mysql

    修复:
    fsck -f /dev/vg0/mysql

    缩减文件系统:
    resize2fs /dev/vg0/mysql 6G

    缩减分区空间:
    lvreduce -L 6G /dev/vg0/mysql

    重新挂载分区:
    mount /dev/vg0/mysql /mnt/mysql
删除LV中硬盘:
   搬出sdd内已用PE
   pvmove /dev/sdd
   删除逻辑卷
   vgreduce vg0 /dev/sdd
   移除硬盘
   pvremove /dev/sdd

posted @ 2019-10-19 21:22  'joker'  阅读(181)  评论(0编辑  收藏  举报