1、自建yum仓库，分别为网络源和本地源
出于安全起见，有些企业内部服务器使用本地局域网而不连接外网，为了安装一些服务，就需要搭建本地的yum仓库；
在系统安装盘内，已经自带了大量必要的安装包，可以用做本地yum仓库的源；
作为yum仓库服务器的主机配置：
先把原来系统相关的配置文件归置存放
[root@mini71 ~]#mkdir /etc/yum.repos.d/bak
[root@mini71 ~]#mv /etc/yum.repos.d/* /etc/yum.repos.d/bak/然后编辑以光盘路径为yum源的配置文件
[root@mini71 ~]#cat /etc/yum.repos.d/base.repo
[base]
name=cdrom
baseurl=file:///mnt/cdrom/
gpgcheck=0配置epel源（作为扩展，可以不配置）
[root@mini71 ~]#cat /etc/yum.repos.d/epel.repo
[aliyun.epel]
name=aliyun epel
baseurl=https://mirrors.aliyun.com/epel/7/x86_64/（这里选择里阿里云的epel源，也可以选择其他的）
gpgcheck=0
enabled=1（通过修改此项为0，即可关闭epel源）安装http服务，启动，并开机启动
[root@mini71 ~]#yum install httpd
[root@mini71 ~]#systemctl start httpd
[root@mini71 ~]#systemctl enable httpd
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.将光盘挂载至httpd路径下
[root@mini71 ~]#mkdir -p /var/www/html/centos/7/os/x86_64
[root@mini71 ~]#mount /dev/sr0 /var/www/html/centos/7/os/x86_64/
mount: /dev/sr0 is write-protected, mounting read-only
[root@mini71 ~]#ls /var/www/html/centos/7/os/x86_64/
CentOS_BuildTag EULA images LiveOS repodata RPM-GPG-KEY-CentOS-Testing-7
EFI GPL isolinux Packages RPM-GPG-KEY-CentOS-7 TRANS.TBL清理yum缓存，再查看yum源列表，出现本地源列表和epel源列表
[root@mini71 ~]#yum clean all
Loaded plugins: fastestmirror
Cleaning repos: aliyun.epel base
Cleaning up list of fastest mirrors
Other repos take up 48 M of disk space (use --verbose for details)
[root@mini71 ~]#yum repolist
Loaded plugins: fastestmirror
Determining fastest mirrors
aliyun.epel | 4.7 kB 00:00:00
base | 3.6 kB 00:00:00
(1/5): aliyun.epel/group_gz | 95 kB 00:00:01
(2/5): base/group_gz | 166 kB 00:00:00
(3/5): aliyun.epel/updateinfo | 1.0 MB 00:00:01
(4/5): base/primary_db | 3.1 MB 00:00:00
(5/5): aliyun.epel/primary_db | 6.7 MB 00:00:03
repo id repo name status
aliyun.epel aliyun epel 13,217
base cdrom 4,021
repolist: 17,238在浏览器输入网址，看到光盘内容即表示可以访问
配置其他主机
开启另外一台虚拟机，配置LAN区段内网，不启动外网和光盘
此时查看yum源列表没有任何可供安装的包
[root@mini73 ~]#yum repolist
Loaded plugins: fastestmirror
Determining fastest mirrors
file:///mnt/cdrom/repodata/repomd.xml: [Errno 14] curl#37 - "Couldn't open file /mnt/cdrom/repodata/repomd.xml"
Trying other mirror.
file:///mnt/cdrom/repodata/repomd.xml: [Errno 14] curl#37 - "Couldn't open file /mnt/cdrom/repodata/repomd.xml"
Trying other mirror.
repo id repo name status
base cdrom 0
repolist: 0配置以yum仓库路径的源
[root@mini73 ~]#cat /etc/yum.repos.d/base.repo
[base]
name=cdrom
baseurl=http://192.168.36.71/centos/7/os/x86_64/
gpgcheck=0刷新yum源，出现可供安装的包列表
[root@mini73 ~]#yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base | 3.6 kB 00:00:00
(1/2): base/group_gz | 166 kB 00:00:00
(2/2): base/primary_db | 3.1 MB 00:00:00
repo id repo name status
base cdrom 4,021
repolist: 4,021测试安装服务，表示安装正常
[root@mini73 ~]#yum install httpd -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package httpd.x86_64 0:2.4.6-88.el7.centos will be installed
.
.
.
Installed:
httpd.x86_64 0:2.4.6-88.el7.centos
Dependency Installed:
apr.x86_64 0:1.4.8-3.el7_4.1 apr-util.x86_64 0:1.5.2-6.el7 httpd-tools.x86_64 0:2.4.6-88.el7.centos mailcap.noarch 0:2.1.41-2.el7
Complete!2、编译安装http2.4，实现可以正常访问，并将编译步骤和结果提交。
安装包已经下载了，没有下载最新的，因为可能会有一些未知bug（如果没下载，就去官方站点或者阿里云下载，这里就不叙述了）
下载一般建议源码编译安装的包放在此目录下，只是建议，尽量规范
[root@mini72 ~]#rpm -qi httpd
package httpd is not installed
[root@mini72 ~]#rpm -qa httpd
[root@mini72 ~]#cd /usr/local/src/
[root@mini72 src]#ls
[root@mini72 src]#rz -E
rz waiting to receive.
[root@mini72 src]#ls
httpd-2.4.25.tar.bz2httpd服务安装运行需要依赖一些其他的服务，所以先把这些包装上，一般不需要全部安装，装devel也就是开发包即可，gcc是关于c语言的，pcre是关于正则表达式的[root@mini72 src]#yum install gcc apr-devel apr-util-devel pcre-devel openssl-devel -y
解压：
[root@mini72 src]#tar xvf httpd-2.4.26.tar.bz2 -C /usr/local/src
[root@mini72 src]#ls
httpd-2.4.25 httpd-2.4.25.tar.bz2
[root@mini72 src]#cd /usr/local/src/httpd-2.4.25
[root@mini72 httpd-2.4.25]#ls
ABOUT_APACHE buildconf httpd.dsp libhttpd.mak README.cmake
acinclude.m4 CHANGES httpd.mak LICENSE README.platforms
Apache-apr2.dsw CMakeLists.txt httpd.spec Makefile.in ROADMAP
Apache.dsw config.layout include Makefile.win server
apache_probes.d configure INSTALL modules srclib
ap.d configure.in InstallBin.dsp NOTICE support
build docs LAYOUT NWGNUmakefile test
BuildAll.dsp emacs-style libhttpd.dep os VERSIONING
BuildBin.dsp httpd.dep libhttpd.dsp README运行脚本一定要在解压之后生成的软件所在目录里运行安装脚本，指定服务主程序路径，配置文件路径，启用ssl，禁用基本的身份验证（选项可以根据自己要求，./configure --help可以查看帮助）[root@mini72 httpd-2.4.25]#./configure --prefix=/apps/httpd24 --sysconfdir=/etc/httpd24/ --enable-ssl --disable-auth-basic
出现这些提示，说明安装成功，如果出现警告或者错误，可能是依赖包没有安装或者防火墙阻止
Server Version: 2.4.25
Install prefix: /apps/httpd24
C compiler: gcc -std=gnu99
CFLAGS: -pthread
LDFLAGS:
LIBS:
CPPFLAGS: -DLINUX -D_REENTRANT -D_GNU_SOURCE
C preprocessor: gcc -E制作安装，过程可能比较慢，再去查看相应的目录下已经出现相关文件
[root@mini72 httpd-2.4.25]#make && make install
.
.
.
make[1]: Leaving directory `/usr/local/src/httpd-2.4.25'
.
.
.
make[1]: Leaving directory `/usr/local/src/httpd-2.4.25'
[root@mini72 httpd-2.4.25]#ls /usr/local/src/httpd-2.4.25
ABOUT_APACHE BuildAll.dsp config.log httpd InstallBin.dsp Makefile.in NWGNUmakefile srclib
acinclude.m4 BuildBin.dsp config.nice httpd.dep LAYOUT Makefile.win os support
Apache-apr2.dsw buildconf config.status httpd.dsp libhttpd.dep modules README test
Apache.dsw buildmark.o configure httpd.mak libhttpd.dsp modules.c README.cmake VERSIONING
apache_probes.d CHANGES configure.in httpd.spec libhttpd.mak modules.lo README.platforms
ap.d CMakeLists.txt docs include LICENSE modules.o ROADMAP
build config.layout emacs-style INSTALL Makefile NOTICE server
[root@mini72 httpd-2.4.25]#ls /apps/httpd24/
bin build cgi-bin error htdocs icons include logs man manual modules
[root@mini72 httpd-2.4.25]#ls /etc/httpd24/
extra httpd.conf magic mime.types origina接下来把服务的执行程序写进变量里并执行，这样每次就不用敲那么长的路径了
[root@mini72 ~]#cat /etc/profile.d/env.sh
PATH=/apps/httpd24/bin:$PATH
[root@mini72 ~]#source /etc/profile.d/env.sh
[root@mini72 ~]#echo $PATH
/apps/httpd24/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
[root@mini72 ~]#apachectl start最后启动apachectl，登陆本地浏览器，出现默认页，说明搭建成功
3、创建一个2G的文件系统，块大小为2048byte，预留1%可用空间,文件系统 ext4，卷标为TEST，要求此分区开机后自动挂载至/test目录，且默认有acl挂载选项
先装上一块10G的硬盘，扫描一下，此时磁盘上面没有任何信息
[root@centos7 ~]#echo '- - -' >/sys/class/scsi_host/host2/scan
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
sr0 11:0 1 4.3G 0 rom
[root@centos7 ~]#lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
├─sda1 xfs de1c872e-abea-498c-a07a-38750913e570 /boot
├─sda2 swap d133fd09-7e88-4e2c-b9bb-b9c86638cf5a [SWAP]
├─sda3 xfs e7dace1d-16b2-4400-bf0a-d7c1027c6f8c /
├─sda4
└─sda5 xfs 89bc32ab-6c2d-481f-ab50-be09a5b73192 /data
sdb
sr0 iso9660 CentOS 7 x86_64 2018-11-25-23-54-16-00 在/dev/sdb上创建分区,大小为2G
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
sr0 11:0 1 4.3G 0 rom
[root@centos7 ~]#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 0x8be52446.
Command (m for help): p
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x8be52446
Device Boot Start End Blocks Id System
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +2G
Partition 1 of type Linux and of size 2 GiB is set
Command (m for help): p
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x8be52446
Device Boot Start End Blocks Id System
/dev/sdb1 2048 4196351 2097152 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@centos7 ~]#fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x0001658e
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 411647 204800 83 Linux
/dev/sda2 411648 8800255 4194304 82 Linux swap / Solaris
/dev/sda3 8800256 12994559 2097152 83 Linux
/dev/sda4 12994560 20971519 3988480 5 Extended
/dev/sda5 12996608 17190911 2097152 83 Linux
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x8be52446
Device Boot Start End Blocks Id System
/dev/sdb1 2048 4196351 2097152 83 Linux
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 2G 0 part
sr0 11:0 1 4.3G 0 rom创建文件系统，-b指定块大小为2048，-m指定预留空间，-L指定卷名
[root@centos7 ~]#mkfs.ext4 -b 2048 -m 1 -L TEST /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=TEST
OS type: Linux
Block size=2048 (log=1)
Fragment size=2048 (log=1)
Stride=0 blocks, Stripe width=0 blocks
131072 inodes, 1048576 blocks
10485 blocks (1.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=269484032
64 block groups
16384 blocks per group, 16384 fragments per group
2048 inodes per group
Superblock backups stored on blocks:
16384, 49152, 81920, 114688, 147456, 409600, 442368, 802816
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@centos7 ~]#lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
├─sda1 xfs de1c872e-abea-498c-a07a-38750913e570 /boot
├─sda2 swap d133fd09-7e88-4e2c-b9bb-b9c86638cf5a [SWAP]
├─sda3 xfs e7dace1d-16b2-4400-bf0a-d7c1027c6f8c /
├─sda4
└─sda5 xfs 89bc32ab-6c2d-481f-ab50-be09a5b73192 /data
sdb
└─sdb1 ext4 TEST 38615919-cf0f-4eb7-ae22-ace6223dca1e
sr0 iso9660 CentOS 7 x86_64 2018-11-25-23-54-16-00查看磁盘的UUID，写进/etc/fstab,
[root@centos7 ~]#blkid /dev/sdb1
/dev/sdb1: LABEL="test" UUID="38615919-cf0f-4eb7-ae22-ace6223dca1e" TYPE="ext4"
[root@centos7 ~]#tail -1 /etc/fstab
UUID=38615919-cf0f-4eb7-ae22-ace6223dca1e /test ext4 defaults 0 0创建目录，挂载所有fstab文件指定的文件系统
[root@centos7 ~]#mkdir /test
[root@centos7 ~]#mount -a
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 2G 0 part /test
sr0 11:0 1 4.3G 0 rom查看分区是否有facl权限
[root@centos7 ~]#tune2fs -l /dev/sdb1
tune2fs 1.42.9 (28-Dec-2013)
Filesystem volume name: test
Last mounted on: <not available>
Filesystem UUID: 38615919-cf0f-4eb7-ae22-ace6223dca1e
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent 64bit flex_bg sparse_super huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 131072
Block count: 1048576
Reserved block count: 10485
Free blocks: 994651
Free inodes: 131061
First block: 0
Block size: 2048
Fragment size: 2048
Group descriptor size: 64
Reserved GDT blocks: 512
Blocks per group: 16384
Fragments per group: 16384
Inodes per group: 2048
Inode blocks per group: 256
Flex block group size: 16
Filesystem created: Wed Mar 25 13:35:35 2020
Last mount time: Wed Mar 25 13:46:06 2020
Last write time: Wed Mar 25 13:46:06 2020
Mount count: 1
Maximum mount count: -1
Last checked: Wed Mar 25 13:35:35 2020
Check interval: 0 (<none>)
Lifetime writes: 65 MB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: 3054c428-09e3-4262-abdd-b3ef0741a97a
Journal backup: inode blocks4、创建一个至少有两个PV组成的大小为20G的名为testvg的VG;要求PE大小 为16MB, 而后在卷组中创建大小为5G的逻辑卷testlv;挂载至/users目录
环境：/dev/sdb盘还有不到8G空间（暂按8G计算），再从/dev/sdc盘中划分出12G，合计20G空间制作物理卷
[root@centos7 ~]#echo '- - -' >/sys/class/scsi_host/host2/scan
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 2G 0 part /test
sdc 8:32 0 16G 0 disk
sr0 11:0 1 4.3G 0 rom
分区
[root@centos7 ~]#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 (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (4196352-20971519, default 4196352):
Using default value 4196352
Last sector, +sectors or +size{K,M,G} (4196352-20971519, default 20971519):
Using default value 20971519
Partition 2 of type Linux and of size 8 GiB is set
Command (m for help): t
Partition number (1,2, default 2): 2
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: 10.7 GB, 10737418240 bytes, 20971520 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
Disk label type: dos
Disk identifier: 0x8be52446
Device Boot Start End Blocks Id System
/dev/sdb1 2048 4196351 2097152 83 Linux
/dev/sdb2 4196352 20971519 8387584 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
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)
Syncing disks.
[root@centos7 ~]#fdisk /dev/sdc
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 0x81bb6c08.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-33554431, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-33554431, default 33554431): +12G
Partition 1 of type Linux and of size 12 GiB is set
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): p
Disk /dev/sdc: 17.2 GB, 17179869184 bytes, 33554432 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
Disk label type: dos
Disk identifier: 0x81bb6c08
Device Boot Start End Blocks Id System
/dev/sdc1 2048 25167871 12582912 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@centos7 ~]#partprobe
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
├─sdb1 8:17 0 2G 0 part /test
└─sdb2 8:18 0 8G 0 part
sdc 8:32 0 16G 0 disk
└─sdc1 8:33 0 12G 0 part
sr0 11:0 1 4.3G 0 rom创建物理卷
[root@centos7 ~]#pvcreate /dev/sdb2
Physical volume "/dev/sdb2" successfully created.
[root@centos7 ~]#pvs
PV VG Fmt Attr PSize PFree
/dev/sdb2 lvm2 --- <8.00g <8.00g
[root@centos7 ~]#pvcreate /dev/sdc1
Physical volume "/dev/sdc1" successfully created.
[root@centos7 ~]#pvs
PV VG Fmt Attr PSize PFree
/dev/sdb2 lvm2 --- <8.00g <8.00g
/dev/sdc1 lvm2 --- 12.00g 12.00g
[root@centos7 ~]#pvdisplay
"/dev/sdb2" is a new physical volume of "<8.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb2
VG Name
PV Size <8.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID vjsQVU-6ihn-v5kD-82nY-O68O-42Iv-7lvEyA
"/dev/sdc1" is a new physical volume of "12.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc1
VG Name
PV Size 12.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID TAYOcw-uI9D-OmBI-kl2P-gBfD-GNXA-nor1vD创建物理卷组，-s指定块大小为16M
[root@centos7 ~]#vgcreate -s 16M testvg /dev/sdb2 /dev/sdc1
Volume group "testvg" successfully created
[root@centos7 ~]#vgs
VG #PV #LV #SN Attr VSize VFree
testvg 2 0 0 wz--n- <19.97g <19.97g
[root@centos7 ~]#vgdisplay
--- Volume group ---
VG Name testvg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size <19.97 GiB
PE Size 16.00 MiB
Total PE 1278
Alloc PE / Size 0 / 0
Free PE / Size 1278 / <19.97 GiB
VG UUID vrXxL9-gewG-0Bo9-VNii-1vrJ-8AFs-xL5r0O创建逻辑卷，大小为5G
[root@centos7 ~]#lvcreate -n testvg -L 5G testvg
Logical volume "testvg" created.
[root@centos7 ~]#lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
testvg testvg -wi-a----- 5.00g
[root@centos7 ~]#lvdisplay
--- Logical volume ---
LV Path /dev/testvg/testvg
LV Name testvg
VG Name testvg
LV UUID cfkOjV-PcjM-uc9C-vrdZ-U6vZ-JGRW-9LYj0q
LV Write Access read/write
LV Creation host, time centos7, 2020-03-25 15:33:25 +0800
LV Status available
open 0
LV Size 5.00 GiB
Current LE 320
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0写入/etc/fstab
[root@centos7 ~]#blkid /dev/testvg/testvg
/dev/testvg/testvg: UUID="c048c0e0-378f-4659-a622-b7b4b78c0a30" TYPE="xfs"
[root@centos7 ~]#echo "UUID=c048c0e0-378f-4659-a622-b7b4b78c0a30 /users xfs defaults 0 0" >> /etc/fstab
[root@centos7 ~]#tail -1 /etc/fstab
UUID=c048c0e0-378f-4659-a622-b7b4b78c0a30 /users xfs defaults 0 0挂载
[root@centos7 ~]#mkdir /users
[root@centos7 ~]#mount -a
[root@centos7 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
├─sda1 8:1 0 200M 0 part /boot
├─sda2 8:2 0 4G 0 part [SWAP]
├─sda3 8:3 0 2G 0 part /
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 2G 0 part /data
sdb 8:16 0 10G 0 disk
├─sdb1 8:17 0 2G 0 part /test
└─sdb2 8:18 0 8G 0 part
└─testvg-testvg 253:0 0 5G 0 lvm /users
sdc 8:32 0 16G 0 disk
└─sdc1 8:33 0 12G 0 part
sr0 11:0 1 4.3G 0 rom /mnt/cdrom
架构班小伙伴看这里：
1、实现openstack控制端的高可用
2、结合lvs实现openstack的负载均衡