Centos7如何使用SSM管理LVM卷

本篇文章为大家展示了Centos7如何使用SSM管理LVM卷，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

环境

• Centos7.7 Minimal

• system-storage-manager 0.4-9

安装SSM

[root@localhost ~]# yum -y install system-storage-manager

列出设备、卷等信息

使用ssm list 显示所有检测到的设备、池、卷和快照的信息：

[root@localhost ~]# ssm list-----------------------------------------------------------Device        Free      Used     Total  Pool    Mount point-----------------------------------------------------------/dev/sda                      40.00 GB                     /dev/sda1                      1.00 GB          /boot      /dev/sda2  4.00 MB  38.99 GB  39.00 GB  centos             /dev/sdb                       2.00 GB                     /dev/sdc                       2.00 GB                     /dev/sdd                       2.00 GB                     -------------------------------------------------------------------------------------------------------------Pool    Type  Devices     Free      Used     Total  --------------------------------------------------centos  lvm   1        4.00 MB  38.99 GB  39.00 GB  ----------------------------------------------------------------------------------------------------------------------------------------Volume            Pool    Volume size  FS      FS size       Free  Type    Mount point--------------------------------------------------------------------------------------/dev/centos/root  centos     36.99 GB  xfs    36.97 GB   34.44 GB  linear  /          /dev/centos/swap  centos      2.00 GB                              linear             /dev/sda1                     1.00 GB  xfs  1014.00 MB  864.65 MB          /boot      --------------------------------------------------------------------------------------[root@localhost ~]#

可以使用ssm list --help查询帮助信息。

创建新的池、逻辑卷、和文件系统

使用/dev/sdb,/dev/sdc,/dev/sdd三块硬盘创建vg0池，创建lv1逻辑卷，大小为1G，格式化为xfs文件系统格式，挂载到/mnt/volume1目录。

# 创建挂载目录[root@localhost ~]# mkdir /mnt/volume1# 创建逻辑卷[root@localhost ~]# ssm create -s 1G -n lv1 -p vg0 --fstype xfs /dev/sd{b,c,d} /mnt/volume1  Physical volume "/dev/sdb" successfully created.  Physical volume "/dev/sdc" successfully created.  Physical volume "/dev/sdd" successfully created.  Volume group "vg0" successfully created  Logical volume "lv1" created.meta-data=/dev/vg0/lv1           isize=512    agcount=4, agsize=65536 blks         =                       sectsz=512   attr=2, projid32bit=1         =                       crc=1        finobt=0, sparse=0data     =                       bsize=4096   blocks=262144, imaxpct=25         =                       sunit=0      swidth=0 blksnaming   =version 2              bsize=4096   ascii-ci=0 ftype=1log      =internal log           bsize=4096   blocks=2560, version=2         =                       sectsz=512   sunit=0 blks, lazy-count=1realtime =none                   extsz=4096   blocks=0, rtextents=0# 查看是否挂载[root@localhost ~]# df -hFilesystem               Size  Used Avail Use% Mounted ondevtmpfs                 898M     0  898M   0% /devtmpfs                    910M     0  910M   0% /dev/shmtmpfs                    910M  9.6M  901M   2% /runtmpfs                    910M     0  910M   0% /sys/fs/cgroup/dev/mapper/centos-root   37G  2.6G   35G   7% //dev/sda1               1014M  150M  865M  15% /boottmpfs                    182M     0  182M   0% /run/user/0/dev/mapper/vg0-lv1     1014M   33M  982M   4% /mnt/volume1

--fstype选项支持的文件类型，目前支持的有：

• ext3

• ext4

• xfs

• btrfs

-s选项指定逻辑卷的大小。

-n选项指定指定逻辑卷的名称

-p选项需要使用哪一个池，如果池不存在，会创建池。

/dev/sd{b,c,d}使用/dev/sdb , /dev/sdc ,/dev/sdd这三个磁盘。

扩展逻辑卷

ssm resize命令可以调整卷的大小。下面的例子是给lv1逻辑卷增加2G空间，总空间为3G。

[root@localhost ~]# ssm resize -s +2G vg0/lv1  Size of logical volume vg0/lv1 changed from 1.00 GiB (256 extents) to 3.00 GiB (768 extents).  Logical volume vg0/lv1 successfully resized.[root@localhost ~]# df -hFilesystem               Size  Used Avail Use% Mounted ondevtmpfs                 898M     0  898M   0% /devtmpfs                    910M     0  910M   0% /dev/shmtmpfs                    910M  9.6M  901M   2% /runtmpfs                    910M     0  910M   0% /sys/fs/cgroup/dev/mapper/centos-root   37G  2.6G   35G   7% //dev/sda1               1014M  150M  865M  15% /boottmpfs                    182M     0  182M   0% /run/user/0/dev/mapper/vg0-lv1      3.0G   33M  3.0G   2% /mnt/volume1

创建快照

为lv1逻辑卷创建快照

[root@localhost ~]# ssm snapshot /dev/vg0/lv1   Rounding up size to full physical extent 412.00 MiB  Logical volume "snap20200325T195111" created.[root@localhost ~]# ssm list snap------------------------------------------------------------------------Snapshot                      Origin  Pool  Volume size     Used  Type  ------------------------------------------------------------------------/dev/vg0/snap20200325T195111  lv1     vg0     412.00 MB  0.00 KB  linear

删除卷、池

在这里删除卷和池。首先要卸载分区。

[root@localhost ~]# umount /mnt/volume1/# 删除vg0池和lv1卷[root@localhost ~]# ssm remove  vg0Do you really want to remove volume group "vg0" containing 2 logical volumes? [y/n]: yDo you really want to remove active origin logical volume vg0/lv1 with 1 snapshot(s)? [y/n]: y  Logical volume "snap20200325T195111" successfully removed  Logical volume "lv1" successfully removed  Volume group "vg0" successfully removed

然后从物理卷里面把/dev/sdb,/dev/sdc,/dev/sdd移除掉。

[root@localhost ~]# pvremove /dev/sd{b,c,d}  Labels on physical volume "/dev/sdb" successfully wiped.  Labels on physical volume "/dev/sdc" successfully wiped.  Labels on physical volume "/dev/sdd" successfully wiped.

SSM通过创建统一的用户界面来缓解这一问题。

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