需求描述
动态分区LVM方式挂载两块新增的硬盘到系统 2021-05-18
# 第一步 # 查看系统内可用的硬盘 root@SERVER:~# fdisk -l ... Disk /dev/vdb: 2 GiB, 2147483648 bytes, 4194304 sectors #新增的硬盘1,大小2GB Disk model: HARDDISK 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: 0xacc559c1 Device Boot Start End Sectors Size Id Type /dev/vdb1 2048 4194303 4192256 2G 8e Linux LVM Disk /dev/vdc: 3 GiB, 3221225472 bytes, 6291456 sectors #新增的硬盘1,大小3GB Disk model: HARDDISK Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes # 第二步 # 依次对刚刚的/dev/vdb /dev/vdc 进行文件系统的创建 root@SERVER:~# fdisk /dev/vdb p #这个地方如果显示了分区,记得按d逐个删除掉 n [enter] [enter] [enter] [enter] t L 8e p w root@SERVER:~# fdisk /dev/vdc p #这个地方如果显示了分区,记得按d逐个删除掉 n [enter] [enter] [enter] [enter] t L 8e p w root@SERVER:~# root@SERVER:~# fdisk -l ... Disk /dev/vdb: 2 GiB, 2147483648 bytes, 4194304 sectors Disk model: HARDDISK 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: 0xec2d5eb5 Device Boot Start End Sectors Size Id Type /dev/vdb1 2048 4194303 4192256 2G 8e Linux LVM Disk /dev/vdc: 3 GiB, 3221225472 bytes, 6291456 sectors Disk model: HARDDISK 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: 0x228299a9 Device Boot Start End Sectors Size Id Type /dev/vdc1 2048 6291455 6289408 3G 8e Linux LVM ... root@SERVER:~# # 第三步 # 物理卷是将在LVM配置中使用的实际存储设备,它可以是整个磁盘, # pvcreate命令初始化这些磁盘,以便它们可以构成卷组 # 如果没有该命令，使用apt-get install lvm2安装组件 root@SERVER:~# pvcreate /dev/vdb1 /dev/vdc1 Physical volume "/dev/vdb1" successfully created. Physical volume "/dev/vdc1" successfully created. root@SERVER:~# root@SERVER:~# pvs PV VG Fmt Attr PSize PFree /dev/vdb1 lvm2 --- <2.00g <2.00g /dev/vdc1 lvm2 --- <3.00g <3.00g root@SERVER:~# # 第四步 # 物理卷被合并为卷组（VG）。它创建了一个磁盘空间池，可以在其中分配逻辑卷 # 逻辑卷被分配到与物理盘区大小相同的逻辑盘区中。 # 因此，卷大小对于卷组中的所有逻辑卷都相同。卷组将逻辑盘区映射到物理盘区 root@SERVER:~# vgcreate vg01 /dev/vdb1 /dev/vdc1 Volume group "vg01" successfully created root@SERVER:~# vgs VG #PV #LV #SN Attr VSize VFree vg01 2 0 0 wz--n- 4.99g 4.99g root@SERVER:~# # 第五步 # 卷组分为逻辑卷。因此，如果您早先创建了vg01，则可以从该VG创建逻辑卷 root@SERVER:~# lvcreate -l 100%VG -n lv01 vg01 Logical volume "lv01" created. root@SERVER:~# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv01 vg01 -wi-a----- 4.99g root@SERVER:~# # 如果是指定大小为50G,命令语法为 root@SERVER:~# lvcreate -L 50G -n lv01 vg01 # 第六步 # 创建需要挂在数据盘的分区目录 root@SERVER:~# mkdir -p /u1 # 第七步 # 创建需要LV盘的文件系统 root@SERVER:~# mkfs -t xfs /dev/vg01/lv01 mke2fs 1.44.5 (15-Dec-2018) Found a dos partition table in /dev/vg01/lv01 Proceed anyway? (y,N) y Creating filesystem with 1308672 4k blocks and 327680 inodes Filesystem UUID: e0fa3f74-3600-408a-b1c5-324694303b65 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736 Allocating group tables: done Writing inode tables: done Creating journal (16384 blocks): done Writing superblocks and filesystem accounting information: done root@SERVER:~# # 第八步 # 挂载LV分区到系统的文件系统 root@SERVER:~# mount /dev/vg01/lv01 /u1 root@SERVER:~# df -h Filesystem Size Used Avail Use% Mounted on udev 977M 0 977M 0% /dev tmpfs 200M 6.0M 194M 4% /run /dev/vda1 14G 4.0G 9.1G 31% / tmpfs 998M 0 998M 0% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 998M 0 998M 0% /sys/fs/cgroup tmpfs 200M 28K 200M 1% /run/user/117 tmpfs 200M 0 200M 0% /run/user/1000 /dev/mapper/vg01-lv01 4.9G 20M 4.6G 1% /u1 #此处可见挂载成功 root@SERVER:~# # 第九步 # 添加如下内容到开机启动文件 /etc/fstab /dev/vg01/lv01 /u1 xfs defaults 0 0 # 第十步 # 重启验证一下开机启动是否有效 root@SERVER:~# reboot # 附录 # 如果前面的操作错误,需要删除vg01 lv01,则按如下步骤删除 root@SERVER:~# lvchange -an /dev/mapper/vg01-lv01 root@SERVER:~# lvremove /dev/mapper/vg1-lv1 Logical volume "lv1" successfully removed root@SERVER:~# vgremove vg1 Volume group "vg1" successfully removed root@SERVER:~# root@SERVER:~# vgremove vg01 Volume group "vg01" successfully removed root@SERVER:~# pvremove /dev/vdb /dev/vdc Labels on physical volume "/dev/vdb" successfully wiped. Labels on physical volume "/dev/vdc" successfully wiped. root@SERVER:~#
