前言：
对于运维工作来说，磁盘管理是一个非常重要的工作。当然了，此类工作也是比较偏向底层的一项工作。
一个合理的磁盘分区设置，文件系统格式，以及准确的lvm逻辑管理会对我们的后期的扩展工作，管理工作带来很大的便利，并且能在一定程度上提升整个服务器的性能。
本文将以VMware虚拟机为例，讲解如何创建lvm，如何不重启服务器的扩容一个在使用的文件系统的根目录以及普通的磁盘如何转化为lvm。
一，
基本概念
基本概念
（1）PV：物理卷（Physical volume）：物理卷在逻辑卷管理中处于最底层，它可以是实际物理硬盘上的分区，也可以是整个物理硬盘。一块硬盘，或多块硬盘。
（2）VG：卷组(Volume Group)：卷组建立在物理卷之上，一个卷组中至少要包括一个物理卷，在卷组建立之后可动态添加物理卷到卷组中。一个逻辑卷管理系统工程中可以只有一个卷组，也可以拥有多个卷组。一堆磁盘的统称。
（3）LV：逻辑卷(Logical Volume)：逻辑卷建立在卷组之上，卷组中的未分配空间可以用于建立新的逻辑卷，逻辑卷建立后可以动态地扩展和缩小空间。系统中的多个逻辑卷可以属于同一个卷组，也可以属于不同的多个卷组。一个逻辑分区，一个分区。
（4）PE（Physical Extent）：每一个物理卷被划分为称为PE(Physical Extents)的基本单元，具有唯一编号的PE是可以被LVM寻址的最小单元。PE的大小是可配置的，默认为4MB。
（5）LE（Logical Extent）：逻辑卷也被划分为被称为LE(Logical Extents) 的可被寻址的基本单位。在同一个卷组中，LE的大小和PE是相同的，并且一一对应。
（6）lvm概念：LVM（Logical Volume Manager逻辑卷管理）是Linux环境中对磁盘分区进行管理的一种机制，是建立在硬盘和分区之上、文件系统之下的一个逻辑层，可提高磁盘分区管理的灵活性。
在centos内，如果是最小化安装可能会没有lvm管理工具，因此，需要安装lvm2：
yum install lvm2 -y
二，
本次实验的环境介绍
三块硬盘，100G的是系统盘
磁盘挂载情况如下：
现在仅有sda在使用，并且sda已经是lvm逻辑卷管理，根目录是50G大小，50+2+47+1刚好是100G，sda磁盘的总共容量。
sdb已经分区并格式化并挂载到了data1目录，总容量是20G
sdc没有分区和格式化。是一个全新的磁盘，总容量是30G
假设现在的需求是将sdb和sdc都纳入lvm管理，并且将根目录扩容到70G
1，
查看扩容前的状态：
主要是使用lsblk，blkid，df，pvdisplay，vgdisplay，lvdisplay这几个命令，根目录的文件系统格式是ext4
[root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 50G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk /data1 sdc 8:32 0 30G 0 disk sr0 11:0 1 4.6G 0 rom /mnt [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/sdb: UUID="6d9e6047-8d2d-4761-97ac-139d9f263155" TYPE="xfs" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" [root@EULEER ~]# df -ah Filesystem Size Used Avail Use% Mounted on rootfs - - - - / sysfs 0 0 0 - /sys proc 0 0 0 - /proc devtmpfs 981M 0 981M 0% /dev securityfs 0 0 0 - /sys/kernel/security tmpfs 992M 0 992M 0% /dev/shm devpts 0 0 0 - /dev/pts 。。。。略略略 /dev/mapper/euleros-root 49G 5.1G 42G 11% / debugfs 0 0 0 - /sys/kernel/debug mqueue 0 0 0 - /dev/mqueue systemd-1 0 0 0 - /proc/sys/fs/binfmt_misc hugetlbfs 0 0 0 - /dev/hugepages /dev/sr0 4.6G 4.6G 0 100% /mnt /dev/sda1 976M 115M 795M 13% /boot /dev/sdb 20G 33M 20G 1% /data1 /dev/mapper/euleros-home 47G 62M 44G 1% /home sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs tmpfs 199M 0 199M 0% /run/user/0 [root@EULEER ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Thu Mar 9 01:23:27 2023 # # 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 # /dev/mapper/euleros-root / ext4 defaults 1 1 UUID=3c6a7424-29c8-4d8d-96b8-1c666a2552b5 /boot ext4 defaults 1 2 /dev/mapper/euleros-home /home ext4 defaults 1 2 /dev/mapper/euleros-swap swap swap defaults 0 0 /dev/sr0 /mnt iso9660 defaults 0 0 [root@EULEER ~]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name euleros PV Size <99.00 GiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 25343 Free PE 1 Allocated PE 25342 PV UUID vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7 [root@EULEER ~]# vgdisplay --- Volume group --- VG Name euleros System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size <99.00 GiB PE Size 4.00 MiB Total PE 25343 Alloc PE / Size 25342 / 98.99 GiB Free PE / Size 1 / 4.00 MiB VG UUID 7jLpC0-m532-xsAA-AQk2-D7VA-f8G9-CKBsuP [root@EULEER ~]# lvdisplay --- Logical volume --- LV Path /dev/euleros/swap LV Name swap VG Name euleros LV UUID k3AxS2-cWUe-4zyz-PCli-bQNp-bUwo-2okGqc LV Write Access read/write LV Creation host, time localhost, 2023-03-09 01:23:18 +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 --- Logical volume --- LV Path /dev/euleros/home LV Name home VG Name euleros LV UUID fdgAw4-YN9L-zAh4-6O2E-f4vT-k7JC-lTDe99 LV Write Access read/write LV Creation host, time localhost, 2023-03-09 01:23:19 +0800 LV Status available # open 1 LV Size 46.99 GiB Current LE 12030 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:2 --- Logical volume --- LV Path /dev/euleros/root LV Name root VG Name euleros LV UUID qXMhds-ivkh-E1QE-7IVy-wZvq-pYYp-aKSPBZ LV Write Access read/write LV Creation host, time localhost, 2023-03-09 01:23:23 +0800 LV Status available # open 1 LV Size 50.00 GiB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0
二，
磁盘规划说明
sdb磁盘划分为两个分区，每个分区10G。其中的第一个分区加入sda的lvm，第二个分区不加入lvm，采用标准分区。
sdc磁盘作为一个整体加入一个全新的lvm，并通过两次扩容，扩容到根目录，使得最终根目录容量到70G
三，
根目录扩容
第一次扩容 从50G扩容到60G，将sdb磁盘划分为两个10G的分区，将第二个分区，也就是sdb2扩容到根目录
###注：根目录扩容的前提条件是根目录是lvm逻辑卷
1，
利用fdisk划分sdb的分区，可以看到第一次分区是错误的，sdb1容量不对，第二次分区才是正确的。
[root@EULEER ~]# fdisk /dev/sdb 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 0x5c6eb410. Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): e Partition number (1-4, default 1): First sector (2048-41943039, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +10G Partition 1 of type Extended and of size 10 GiB is set Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@EULEER ~]# partprobe Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. [root@EULEER ~]# fdisk /dev/sdb 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): n Partition type: p primary (0 primary, 1 extended, 3 free) l logical (numbered from 5) Select (default p): l Adding logical partition 5 First sector (4096-20973567, default 4096): Using default value 4096 Last sector, +sectors or +size{K,M,G} (4096-20973567, default 20973567): Using default value 20973567 Partition 5 of type Linux and of size 10 GiB is set Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@EULEER ~]# partprobe Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. [root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 50G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 1K 0 part └─sdb5 8:21 0 10G 0 part sdc 8:32 0 30G 0 disk sr0 11:0 1 4.6G 0 rom /mnt [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" [root@EULEER ~]# fdisk /dev/sdb 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): t Partition number (1,5, default 5): 5 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. Syncing disks.
分区完毕后，查看分区的状态，并执行扩容命令，扩容了两次，第一次是9G，第二次是1G：
主要使用的命令是vgs， vgextend，lvextend，resize2fs
特别需要注意的是vgs命令，该命令不带参数的时候可以查看所有的vg，主要是该命令会显示vg的剩余容量，例如本例中，第一次查询是剩余4m，扩容vg后，可以看到剩余容量达到了10G，执行了vgextend euleros /dev/sdb5这个命令后，vgs命令显示pv增加了1，vfree表示有10G的空间扩容。
[root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 10.00g
vgextend 现有的vg名称 要添加的分区，本例就是vgextend euleros /dev/sdb5
resize2fs是针对ext4分区格式的命令，本例中要扩容的根目录是ext4分区格式。如果是xfs的分区格式，则使用xfs_growfs命令。该命令主要是同步df命令，否则是仅仅vgs命令显示扩容了，而df命令还是原来的显示。
[root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 1 3 0 wz--n- <99.00g 4.00m [root@EULEER ~]# vgextend euleros /dev/sdb5 Physical volume "/dev/sdb5" successfully created. Volume group "euleros" successfully extended [root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 50G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 1K 0 part └─sdb5 8:21 0 10G 0 part sdc 8:32 0 30G 0 disk sr0 11:0 1 4.6G 0 rom /mnt [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" /dev/sdb5: UUID="JKvfyx-9GzI-XXTD-eaq5-6LG1-4JPU-YhvyJo" TYPE="LVM2_member" [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 10.00g [root@EULEER ~]# lvextend -L +9G /dev/euleros/root Size of logical volume euleros/root changed from 50.00 GiB (12800 extents) to 59.00 GiB (15104 extents). Logical volume euleros/root successfully resized. [root@EULEER ~]# resize2fs /dev/mapper/euleros-root resize2fs 1.45.0 (6-Mar-2019) Filesystem at /dev/mapper/euleros-root is mounted on /; on-line resizing required old_desc_blocks = 7, new_desc_blocks = 8 The filesystem on /dev/mapper/euleros-root is now 15466496 (4k) blocks long. [root@EULEER ~]# df -ah Filesystem Size Used Avail Use% Mounted on rootfs - - - - / sysfs 0 0 0 - /sys proc 0 0 0 - /proc devtmpfs 981M 0 981M 0% /dev securityfs 0 0 0 - /sys/kernel/security tmpfs 992M 0 992M 0% /dev/shm devpts 0 0 0 - /dev/pts tmpfs 992M 9.0M 983M 1% /run tmpfs 992M 0 992M 0% /sys/fs/cgroup cgroup 0 0 0 - /sys/fs/cgroup/systemd pstore 0 0 0 - /sys/fs/pstore cgroup 0 0 0 - /sys/fs/cgroup/freezer cgroup 0 0 0 - /sys/fs/cgroup/cpuset cgroup 0 0 0 - /sys/fs/cgroup/memory cgroup 0 0 0 - /sys/fs/cgroup/cpu,cpuacct cgroup 0 0 0 - /sys/fs/cgroup/hugetlb cgroup 0 0 0 - /sys/fs/cgroup/pids cgroup 0 0 0 - /sys/fs/cgroup/devices cgroup 0 0 0 - /sys/fs/cgroup/net_cls,net_prio cgroup 0 0 0 - /sys/fs/cgroup/perf_event cgroup 0 0 0 - /sys/fs/cgroup/files cgroup 0 0 0 - /sys/fs/cgroup/blkio configfs 0 0 0 - /sys/kernel/config /dev/mapper/euleros-root 58G 5.1G 50G 10% / debugfs 0 0 0 - /sys/kernel/debug [root@EULEER ~]# lvextend -L +1G /dev/euleros/root Size of logical volume euleros/root changed from 59.00 GiB (15104 extents) to 60.00 GiB (15360 extents). Logical volume euleros/root successfully resized. [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 [root@EULEER ~]# resize2fs /dev/mapper/euleros-root resize2fs 1.45.0 (6-Mar-2019) Filesystem at /dev/mapper/euleros-root is mounted on /; on-line resizing required old_desc_blocks = 8, new_desc_blocks = 8 The filesystem on /dev/mapper/euleros-root is now 15728640 (4k) blocks long. [root@EULEER ~]# df -ah Filesystem Size Used Avail Use% Mounted on rootfs - - - - / sysfs 0 0 0 - /sys proc 0 0 0 - /proc devtmpfs 981M 0 981M 0% /dev securityfs 0 0 0 - /sys/kernel/security tmpfs 992M 0 992M 0% /dev/shm devpts 0 0 0 - /dev/pts tmpfs 992M 14M 979M 2% /run tmpfs 992M 0 992M 0% /sys/fs/cgroup cgroup 0 0 0 - /sys/fs/cgroup/systemd pstore 0 0 0 - /sys/fs/pstore cgroup 0 0 0 - /sys/fs/cgroup/freezer cgroup 0 0 0 - /sys/fs/cgroup/cpuset cgroup 0 0 0 - /sys/fs/cgroup/memory cgroup 0 0 0 - /sys/fs/cgroup/cpu,cpuacct cgroup 0 0 0 - /sys/fs/cgroup/hugetlb cgroup 0 0 0 - /sys/fs/cgroup/pids cgroup 0 0 0 - /sys/fs/cgroup/devices cgroup 0 0 0 - /sys/fs/cgroup/net_cls,net_prio cgroup 0 0 0 - /sys/fs/cgroup/perf_event cgroup 0 0 0 - /sys/fs/cgroup/files cgroup 0 0 0 - /sys/fs/cgroup/blkio configfs 0 0 0 - /sys/kernel/config /dev/mapper/euleros-root 59G 5.1G 51G 9% / debugfs 0 0 0 - /sys/kernel/debug mqueue 0 0 0 - /dev/mqueue systemd-1 - - - - /proc/sys/fs/binfmt_misc hugetlbfs 0 0 0 - /dev/hugepages /dev/sr0 4.6G 4.6G 0 100% /mnt /dev/sda1 976M 115M 795M 13% /boot /dev/mapper/euleros-home 47G 62M 44G 1% /home sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs tmpfs 199M 0 199M 0% /run/user/0 binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc [root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 60G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 1K 0 part └─sdb5 8:21 0 10G 0 part └─euleros-root 253:0 0 60G 0 lvm / sdc 8:32 0 30G 0 disk sr0 11:0 1 4.6G 0 rom /mnt ####注： 这里显示了两个挂载点 / ,不用奇怪，是正常现象。 [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" /dev/sdb5: UUID="JKvfyx-9GzI-XXTD-eaq5-6LG1-4JPU-YhvyJo" TYPE="LVM2_member"
四，
新分区的lvm创建
1，
创建新的名为vg的lvm：
[root@EULEER ~]# pvcreate /dev/sdb2 Physical volume "/dev/sdb2" successfully created. [root@EULEER ~]# vgcreate vg /dev/sdb2 Volume group "vg" successfully created [root@EULEER ~]# lvcreate -L vg + 10G Size requires number argument. Invalid argument for --size: vg Error during parsing of command line. [root@EULEER ~]# lvcreate -n vg -L 10G vg Volume group "vg" has insufficient free space (2559 extents): 2560 required. [root@EULEER ~]# lvcreate -n vg -L 9G vg Logical volume "vg" created.
2，
将sdb2加入新lvm：
[root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 vg 1 1 0 wz--n- <10.00g 1020.00m [root@EULEER ~]# vgextend vg /dev/sd /dev/sda2 /dev/sdb1 /dev/sdb2 [root@EULEER ~]# lvextend -L +1020M /dev/vg/vg Size of logical volume vg/vg changed from 9.00 GiB (2304 extents) to <10.00 GiB (2559 extents). Logical volume vg/vg successfully resized. [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 vg 1 1 0 wz--n- <10.00g 0
3，
格式化新lvm：
[root@EULEER ~]# mkfs.xfs /dev/vg vg/ vga_arbiter [root@EULEER ~]# mkfs.xfs /dev/vg/vg meta-data=/dev/vg/vg isize=512 agcount=4, agsize=655104 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0 data = bsize=4096 blocks=2620416, 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
4，
查看新lvm：
[root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 60G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 10G 0 part │ └─euleros-root 253:0 0 60G 0 lvm / └─sdb2 8:18 0 10G 0 part └─vg-vg 253:3 0 10G 0 lvm sdc 8:32 0 30G 0 disk sr0 11:0 1 4.6G 0 rom /mnt [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/sdb1: UUID="WLHsQw-tWIN-1WPD-fmc1-W7nO-diN2-gdE6B4" TYPE="LVM2_member" /dev/sdb2: UUID="0JBSkV-NnDy-OM7z-CoXb-z4ON-oFrD-4mH5Cv" TYPE="LVM2_member" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" /dev/mapper/vg-vg: UUID="b97d0da8-09b2-4ad6-a666-4d54f4e0fabc" TYPE="xfs" [root@EULEER ~]# [root@EULEER ~]# mount /dev/vg/vg /data1/ [root@EULEER ~]# touch /data1/test [root@EULEER ~]#
4，
新磁盘sdc整体加入新lvm：
####注：可以看到，总计有39G容量没有分配，分两次通过vgs命令扩容新lvm的，由于上面那一步是个格式化的xfs，因此，是使用xfs_growfs命令扩容的。
[root@EULEER ~]# vgextend vg /dev/sdc Physical volume "/dev/sdc" successfully created. Volume group "vg" successfully extended [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 vg 2 1 0 wz--n- 39.99g <30.00g [root@EULEER ~]# lvextend -L +30G /dev/vg/vg Insufficient free space: 7680 extents needed, but only 7679 available [root@EULEER ~]# lvextend -L +29G /dev/vg/vg Size of logical volume vg/vg changed from <10.00 GiB (2559 extents) to <39.00 GiB (9983 extents). Logical volume vg/vg successfully resized. [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 vg 2 1 0 wz--n- 39.99g 1020.00m [root@EULEER ~]# lvextend -L +1020M /dev/vg/vg Size of logical volume vg/vg changed from <39.00 GiB (9983 extents) to 39.99 GiB (10238 extents). Logical volume vg/vg successfully resized. [root@EULEER ~]# vgs VG #PV #LV #SN Attr VSize VFree euleros 2 3 0 wz--n- 108.99g 0 vg 2 1 0 wz--n- 39.99g 0 [root@EULEER ~]# xfs_growfs /dev/vg vg/ vga_arbiter [root@EULEER ~]# xfs_growfs /dev/vg/vg meta-data=/dev/mapper/vg-vg isize=512 agcount=4, agsize=655104 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=2620416, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 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 2620416 to 10483712
[root@EULEER ~]# df -ah Filesystem Size Used Avail Use% Mounted on rootfs - - - - / sysfs 0 0 0 - /sys proc 0 0 0 - /proc devtmpfs 981M 0 981M 0% /dev securityfs 0 0 0 - /sys/kernel/security tmpfs 992M 0 992M 0% /dev/shm devpts 0 0 0 - /dev/pts tmpfs 992M 9.0M 983M 1% /run tmpfs 992M 0 992M 0% /sys/fs/cgroup cgroup 0 0 0 - /sys/fs/cgroup/systemd pstore 0 0 0 - /sys/fs/pstore 中间的无关紧要的部分略略略。。。。。。。。。。 configfs 0 0 0 - /sys/kernel/config /dev/mapper/euleros-root 59G 5.1G 51G 9% / hugetlbfs 0 0 0 - /dev/hugepages systemd-1 - - - - /proc/sys/fs/binfmt_misc mqueue 0 0 0 - /dev/mqueue debugfs 0 0 0 - /sys/kernel/debug /dev/sr0 4.6G 4.6G 0 100% /mnt /dev/sda1 976M 115M 795M 13% /boot /dev/mapper/euleros-home 47G 62M 44G 1% /home sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs tmpfs 199M 0 199M 0% /run/user/0 binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc /dev/mapper/vg-vg 40G 33M 40G 1% /data1 [root@EULEER ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 100G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─euleros-root 253:0 0 60G 0 lvm / ├─euleros-swap 253:1 0 2G 0 lvm [SWAP] └─euleros-home 253:2 0 47G 0 lvm /home sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 10G 0 part │ └─euleros-root 253:0 0 60G 0 lvm / └─sdb2 8:18 0 10G 0 part └─vg-vg 253:3 0 40G 0 lvm /data1 sdc 8:32 0 30G 0 disk └─vg-vg 253:3 0 40G 0 lvm /data1 sr0 11:0 1 4.6G 0 rom /mnt [root@EULEER ~]# blkid /dev/sr0: UUID="2019-02-12-00-00-00-00" LABEL="EulerOS V2.0SP5 x86_64" TYPE="iso9660" /dev/sda1: UUID="3c6a7424-29c8-4d8d-96b8-1c666a2552b5" TYPE="ext4" /dev/sda2: UUID="vdoK22-iLHE-SXBp-II7t-jr83-YZrT-Ck9hp7" TYPE="LVM2_member" /dev/sdb1: UUID="WLHsQw-tWIN-1WPD-fmc1-W7nO-diN2-gdE6B4" TYPE="LVM2_member" /dev/sdb2: UUID="0JBSkV-NnDy-OM7z-CoXb-z4ON-oFrD-4mH5Cv" TYPE="LVM2_member" /dev/mapper/euleros-root: UUID="2192f98c-8066-4ff4-ab12-38abb88ae21b" TYPE="ext4" /dev/mapper/euleros-swap: UUID="1ce50f1b-8271-4a6d-bd4f-27b427f195e7" TYPE="swap" /dev/mapper/euleros-home: UUID="3d61f021-8916-455e-97fe-0411218d85c2" TYPE="ext4" /dev/mapper/vg-vg: UUID="b97d0da8-09b2-4ad6-a666-4d54f4e0fabc" TYPE="xfs" /dev/sdc: UUID="LTxfMg-F415-NVrC-U5nr-N94x-auj6-8S1Rzf" TYPE="LVM2_member"
