linux centos7系统磁盘扩容
查看当前磁盘挂载情况:
[root@hadoop102 reliable]# fdisk -l
磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000cef83
设备 Boot Start End Blocks Id System
系统目前有的分区:
/dev/sda1 * 2048 2099199 1048576 83 Linux/dev/sda2 2099200 41943039 19921920 8e Linux LVM
磁盘 /dev/mapper/centos-root:18.2 GB, 18249416704 字节,35643392 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘 /dev/mapper/centos-swap:2147 MB, 2147483648 字节,4194304 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节
[root@hadoop102 reliable]# pvcreate /dev/sda Device /dev/sda excluded by a filter.
选择操作的磁盘:
[root@hadoop102 reliable]# fdisk /dev/sda 欢迎使用 fdisk (util-linux 2.23.2)。
更改将停留在内存中,直到您决定将更改写入磁盘。 使用写入命令前请三思。
查看磁盘分区情况:(当前未分区)
命令(输入 m 获取帮助):p
磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000cef83
设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM
重新分区:
命令(输入 m 获取帮助):n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p分区号 (3,4,默认 3):3 起始 扇区 (41943040-104857599,默认为 41943040):41943040 Last 扇区, +扇区 or +size{K,M,G} (41943040-104857599,默认为 104857599):104857599 分区 3 已设置为 Linux 类型,大小设为 30 GiB
命令(输入 m 获取帮助):p
磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000cef83
设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM /dev/sda3 41943040 104857599 31457280 83 Linux
更改分区id:
命令(输入 m 获取帮助):t分区号 (1-3,默认 3):3Hex 代码(输入 L 列出所有代码):L
0 空 24 NEC DOS 81 Minix / 旧 Linu bf Solaris 1 FAT12 27 隐藏的 NTFS Win 82 Linux 交换 / 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 隐藏的 C: c6 DRDOS/sec (FAT- 4 FAT16 <32M 40 Venix 80286 85 Linux 扩展 c7 Syrinx 5 扩展 41 PPC PReP Boot 86 NTFS 卷集 da 非文件系统数据 6 FAT16 42 SFS 87 NTFS 卷集 db CP/M / CTOS / . 7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux 纯文本 de Dell 工具 8 AIX 4e QNX4.x 第2部分 8e Linux LVM df BootIt 9 AIX 可启动 4f QNX4.x 第3部分 93 Amoeba e1 DOS 访问 a OS/2 启动管理器 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 休 eb BeOS fs e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT f W95 扩展 (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/ 10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC 11 隐藏的 FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor 12 Compaq 诊断 5c Priam Edisk a9 NetBSD f4 SpeedStor 14 隐藏的 FAT16 <3 61 SpeedStor ab Darwin 启动 f2 DOS 次要 16 隐藏的 FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS 17 隐藏的 HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE 18 AST 智能睡眠 65 Novell Netware b8 BSDI swap fd Linux raid 自动 1b 隐藏的 W95 FAT3 70 DiskSecure 多启 bb Boot Wizard 隐 fe LANstep 1c 隐藏的 W95 FAT3 75 PC/IX be Solaris 启动 ff BBT 1e 隐藏的 W95 FAT1 80 旧 Minix Hex 代码(输入 L 列出所有代码):L
Hex 代码(输入 L 列出所有代码):8e已将分区“Linux”的类型更改为“Linux LVM”
命令(输入 m 获取帮助):p
磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000cef83
设备 Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
/dev/sda3 41943040 104857599 31457280 8e Linux LVM
保存退出:
命令(输入 m 获取帮助):w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
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)
正在同步磁盘。
[root@hadoop102 reliable]# pvcreate /dev/sda3
Device /dev/sda3 not found.
[root@hadoop102 reliable]# pvcreate /dev/sda3
Device /dev/sda3 not found.
[root@hadoop102 reliable]# reboot
Connection closing...Socket close.Connection closed by foreign host.
Disconnected from remote host(hadoop102) at 23:01:54.
Type `help' to learn how to use Xshell prompt.
[d:\~]$Connecting to 192.168.10.102:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.Last login: Sun Oct 10 22:47:45 2021 from 192.168.10.1
[reliable@hadoop102 ~]$ su root
密码:
创建物理卷:
[root@hadoop102 reliable]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.
查看物理卷信息:(vgdisplay也是查看物理卷信息)
[root@hadoop102 reliable]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size <19.00 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4863
Free PE 0
Allocated PE 4863
PV UUID 22vpSH-n99s-ZRrF-H0te-TVY8-x9j5-cQLjPU
"/dev/sda3" is a new physical volume of "30.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda3
VG Name
PV Size 30.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID GBPZg0-Gqbf-vzmW-3k7G-RwF0-0yKc-bwZ9bo
新分区添加到根目录中:
[root@hadoop102 reliable]# vgextend centos /dev/sda3
Volume group "centos" successfully extended
扩容:
[root@hadoop102 reliable]# lvextend -l +100%FREE /dev/mapper/centos-root
Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to 46.99 GiB (12030 extents).
Logical volume centos/root successfully resized.
调整卷分区大小:
[root@hadoop102 reliable]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, 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 4455424 to 12318720
查看结果:
[root@hadoop102 reliable]# df -h 文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 470M 0 470M 0% /dev
tmpfs 487M 0 487M 0% /dev/shm
tmpfs 487M 8.3M 478M 2% /run
tmpfs 487M 0 487M 0% /sys/fs/cgroup
/dev/mapper/centos-root 47G 15G 33G 32% /
/dev/sda1 976M 142M 768M 16% /boot
tmpfs 98M 8.0K 98M 1% /run/user/42
tmpfs 98M 0 98M 0% /run/user/1000
[root@hadoop102 reliable]#