DISK（RAID5和LVM）服务配置-摩杜云开发者社区

题目要求：

· 在虚拟机上添加 4 个 1G 的硬盘；

· 创建 raid5，其中一个作为热备盘, 设备名为md0;

· 将 md0 设置为 LVM，设备为/dev/vg01/lv01；

· 格式化为 ext4 文件系统;

· 开机自动挂载到/data 目录。

题目实施：

RAID5配置

添加4个1g的虚拟磁盘，查看：

DISK（RAID5和LVM）服务配置

//未添加之前
[root@server01 ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   50G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   49G  0 part 
  ├─centos-root 253:0    0   47G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sr0              11:0    1  4.4G  0 rom 
//添加之后
[root@server01 ~]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   50G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   49G  0 part 
  ├─centos-root 253:0    0   47G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0    1G  0 disk 
sdc               8:32   0    1G  0 disk 
sdd               8:48   0    1G  0 disk 
sde               8:64   0    1G  0 disk 
sr0              11:0    1  4.4G  0 rom

安装软件包：

[root@server01 ~]# yum install mdadm -y

创建RAID5：

#-C 创建 raid
#-v 显示过程
#-n 指定设备数量
#-x 指定热备盘数量
#-l 指定 RAID 等级

[root@server01 ~]# mdadm -Cv /dev/md0 -n 3 -x 1 -l 5 /dev/sd[b-e]
mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: chunk size defaults to 512K
mdadm: size set to 1046528K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
[root@server01 ~]#

查看创建：

[root@server01 ~]# mdadm -D /dev/md0 /dev/
/dev/md0:
           Version : 1.2
     Creation Time : Mon Dec 12 20:20:27 2022
        Raid Level : raid5
        Array Size : 2093056 (2044.00 MiB 2143.29 MB)
     Used Dev Size : 1046528 (1022.00 MiB 1071.64 MB)
      Raid Devices : 3
     Total Devices : 4
       Persistence : Superblock is persistent

       Update Time : Mon Dec 12 20:20:33 2022
             State : clean 
    Active Devices : 3
   Working Devices : 4
    Failed Devices : 0
     Spare Devices : 1

            Layout : left-symmetric
        Chunk Size : 512K

Consistency Policy : resync

              Name : server01:0  (local to host server01)
              UUID : 88e7da96:de40f7c5:38b5dd25:e2ffc3ab
            Events : 18

    Number   Major   Minor   RaidDevice State
       0       8       16        0      active sync   /dev/sdb
       1       8       32        1      active sync   /dev/sdc
       4       8       48        2      active sync   /dev/sdd

       3       8       64        -      spare   /dev/sde
mdadm: /dev/ does not appear to be an md device
[root@server01 ~]#

LVM配置

创建LVM：

#创建物理卷
[root@server01 ~]# pvcreate /dev/md0
  Physical volume "/dev/md0" successfully created.
  
#创建卷组
[root@server01 ~]# vgcreate vg01 /dev/md0
  Volume group "vg01" successfully created
 
#创建逻辑卷，-n：名称 -L：以G为单位 -l：以4M为单位
[root@server01 ~]# lvcreate -n lv01 -L 1g vg01
  Logical volume "lv01" created.

查看逻辑卷：

[root@server01 ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/vg01/lv01  #这里是我们创建的
  LV Name                lv01
  VG Name                vg01
  LV UUID                W2K82H-1q51-oOf8-pIFP-nzCr-4Nnh-Z3WoQY
  LV Write Access        read/write
  LV Creation host, time server01, 2022-12-12 20:24:45 +0800
  LV Status              available
  # open                 0
  LV Size                1.00 GiB
  Current LE             256
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:2
   
  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                rqCGRJ-Ej2D-pdR0-km7h-g1MB-3tsW-0nI19H
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-06-07 03:04:09 +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/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                WoQUmg-BuZp-dVJP-hpru-Lsu0-zPkG-Ughp6i
  LV Write Access        read/write
  LV Creation host, time localhost, 2022-06-07 03:04:10 +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           253:0
   
[root@server01 ~]#

格式化RAID：

[root@server01 ~]# mkfs.ext4 /dev/vg01/lv01
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376

Allocating group tables: 完成                            
正在写入inode表: 完成                            
Creating journal (8192 blocks): 完成
Writing superblocks and filesystem accounting information: 完成

[root@server01 ~]#

进行配置永久挂载：

创建挂载目录/data：

[root@server01 ~]# mkdir /data

永久挂载：

[root@server01 ~]# echo '/dev/vg01/lv01 /data ext4 defaults 0 0' >>/etc/fstab
[root@server01 ~]# mount -a

查看挂载文件（重启测试）：

[root@server01 ~]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 475M     0  475M    0% /dev
tmpfs                    487M     0  487M    0% /dev/shm
tmpfs                    487M  7.7M  479M    2% /run
tmpfs                    487M     0  487M    0% /sys/fs/cgroup
/dev/mapper/centos-root   47G  1.4G   46G    3% /
/dev/sda1               1014M  138M  877M   14% /boot
tmpfs                     98M     0   98M    0% /run/user/0
/dev/mapper/vg01-lv01    976M  2.6M  907M    1% /data
[root@server01 ~]#

配置完成