Creating a File System Resource

The steps for creating file system resources are described below. File system resources provide the capability to switch file systems on shared storage between cluster nodes.

System Configuration

The environment created in this guide is a two-node configuration as shown below.

To create file system resources, the following conditions must be satisfied:

• Shared storage (e.g., iSCSI, Fibre Channel) is physically connected to each node
• A file system has been created using a utility such as mkfs
• The file system can be mounted/unmounted on each node
  

Perform the following steps on target1

1. Mounting a file system
   Mount a file system for which you want to create a file system resource.
   In the example, /dev/sdb1 is mounted on /mnt/fs. The mount point is /mnt/fs.

[target1]# df
Filesystem              1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root  14034944 6904924   7130020  50% /
devtmpfs                   929204       0    929204   0% /dev
tmpfs                      941312       0    941312   0% /dev/shm
tmpfs                      941312   25948    915364   3% /run
tmpfs                      941312       0    941312   0% /sys/fs/cgroup
/dev/sda1                  1038336 148528    889808  15% /boot
tmpfs                      188264       0    188264   0% /run/user/0
/dev/sdb1                  1044132  32992   1011140   4% /mnt/fs

2. Creating a resource
   Run the following command.

[target1]# lkcli resource create fs --tag fs-tag --mountpoint /mnt/fs

Resource Settings

3. Extending a resource
   Run the following command.

[target1]# lkcli resource extend fs --tag fs-tag --dest target2

Resource Settings

4. Checking the resource
   After creating and extending the resource, run the following command.
   The resource information is displayed.

[target1]# lkcli status -q
 
LOCAL   TAG           ID                                   STATE     PRIO  PRIMARY
target1 fs-tag        /mnt/fs                              ISP          1  target1
target1  device28856  36000c292eb0c693b2efb44ed56556636-1  ISP          1  target1
target1   disk28786   36000c292eb0c693b2efb44ed56556636    ISP          1  target1

When you create a file system resource, multiple resources are automatically created with dependencies as shown above.