“stratis”是 CentOS/RHEL 8 发行版中引入的新卷管理器。
这篇文章概述了在 CentOS/RHEL 8 系统中创建或者删除新的 Stratis 文件系统的步骤。
我们还将在这篇文章中看到如何挂载和卸载 Stratis 文件系统。

创建和挂载 Stratis 文件系统

1. 安装 Stratis 包：

# rpm -qa | grep "strati*"
stratisd-1.0.3-1.el8.x86_64
stratis-cli-1.0.2-1.el8.noarch

2. 启用并启动stratisd服务：

# systemctl enable --now stratisd
# systemctl start stratisd

验证stratisd服务的状态：

# systemctl status stratisd
● stratisd.service - A daemon that manages a pool of block devices to create flexible filesystems
Loaded: loaded (/usr/lib/systemd/system/stratisd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2019-08-19 17:12:11 EDT; 1s ago
Docs: man:stratisd(8)
Main PID: 8642 (stratisd)
Tasks: 1 (limit: 26213)
Memory: 876.0K
CGroup: /system.slice/stratisd.service
└─8642 /usr/libexec/stratisd --debug

3. 创建一个池：

# stratis pool create Stratis_Test /dev/sdb

验证我们刚刚创建的池：

# stratis pool list
Name Total Physical Size Total Physical Used
Stratis_Test 1.09 GiB 52 MiB

4. 在新创建的“Stratis_Test”池上创建文件系统：

# stratis filesystem create Stratis_Test x01

验证文件系统创建：

# stratis filesystem list
Pool Name Name Used Created Device UUID
Stratis_Test x01 546 MiB Aug 19 2019 17:19 /stratis/Stratis_Test/x01 aa24d4adfd4342e38a1ffe0c5e7debe6

5. 创建挂载点并挂载文件系统：

# mkdir /x01
# mount /stratis/Stratis_Test/x01 /x01

检查确认：

# df -h | grep /x01
/dev/mapper/stratis-1-6c2cd4f86a58439f9f1aa6a004b919db-thin-fs-aa24d4adfd4342e38a1ffe0c5e7debe6 1.0T 7.2G 1017G 1% /x01

# grep x01 /proc/mounts
/dev/mapper/stratis-1-50fb0bbeb3e24ceaafd7be90917208df-thin-fs-9b9d33fac8734406907283fde7567889 /x01 xfs rw,seclabel,relatime,attr2,inode64,sunit=2048,swidth=2048,noquota 0 0

注意：如果需要向现有池添加更多块开发，请继续执行步骤 6.

6. 向现有池添加更多的blockdev：

语法 ：

pool add-data [pool_name] [blockdev] [[blockdev]..]
Add one or more blockdevs to an existing pool, to enlarge its storage capacity.

在我们的例子中，命令是：

# stratis pool add-data Stratis_Test /dev/sdb

# stratis pool list
Name Total Physical Size Total Physical Used
Stratis_Test 1.09 GiB 598 MiB ---------------
# stratis filesystem list
Pool Name Name Used Created Device UUID
Stratis_Test x01 546 MiB Aug 19 2019 17:19 /stratis/Stratis_Test/x01 aa24d4adfd4342e38a1ffe0c5e7debe6
# stratis blockdev list
Pool Name Device Node Physical Size State Tier
Stratis_Test /dev/sdb 1.09 GiB In-use Data

删除 Stratis 文件系统

1. 检查池和文件系统配置：

# stratis pool list
Name Total Physical Size Total Physical Used
Stratis_Test 1.09 GiB 598 MiB

# stratis filesystem list
Pool Name Name Used Created Device UUID
Stratis_Test x01 546 MiB Aug 19 2019 17:19 /stratis/Stratis_Test/x01 aa24d4adfd4342e38a1ffe0c5e7debe6

# stratis blockdev list
Pool Name Device Node Physical Size State Tier
Stratis_Test /dev/sdb 1.09 GiB In-use Data

2. 卸载文件系统并distroy 文件系统，然后是池。

# umount /x01
Destroy the stratis filesystem/pool
# stratis fs destroy Stratis_Test x01
# stratis pool destroy Stratis_Test

3. 验证：

# stratis pool list
Name Total Physical Size Total Physical Used

# stratis filesystem list
Pool Name Name Used Created Device UUID

# stratis blockdev list
Pool Name Device Node Physical Size State Tier

自动挂载文件系统

1. 检查 UUID：

# blkid -p /stratis/Stratis_Test/x01
/stratis/Stratis_Test/x01: UUID="aa24d4ad-fd43-42e3-8a1f-fe0c5e7debe6" TYPE="xfs" USAGE="filesystem"

2. 将 UUID 写入文件 /etc/fstab：

# echo "UUID="aa24d4ad-fd43-42e3-8a1f-fe0c5e7debe6 /x01 xfs defaults 0 0" >> /etc/fstab

# cat /etc/fstab
/dev/mapper/ol-root / xfs defaults 0 0 
UUID=0c39942a-a85b-454c-bdbc-44443874241e /boot xfs defaults 0 0
/dev/mapper/ol-swap swap swap defaults 0 0
UUID=9b9d33fa-c873-4406-9072-83fde7567889 /x01 xfs defaults 0 0

注意：如果我们已经安装了文件系统，请继续执行第 3 步，如果没有，请执行第 4 步。

3. 卸载挂载点：

# umount /x01

4. 使用 /etc/fstab 挂载挂载点：

# mount -a

# df -h | grep x01
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/stratis-1-6c2cd4f86a58439f9f1aa6a004b919db-thin-fs-aa24d4adfd4342e38a1ffe0c5e7debe6 1.0T 7.2G 1017G 1% /x01