Chapter 14. Creating and Maintaining Snapshots with Snapper

Procedure 14.1. Creating a Snapper Configuration File

1. Create or choose either:
   • A thinly-provisioned logical volume with a Red Hat supported file system on top of it, or
   • A Btrfs subvolume.
2. Mount the file system.
3. Create the configuration file that defines this volume.
   For LVM2:

   # snapper -c config_name create-config -f "lvm(fs_type)" /mount-point

   For example, to create a configuration file called lvm_config on an LVM2 subvolume with an ext4 file system, mounted at /lvm_mount, use:

   # snapper -c lvm_config create-config -f "lvm(ext4)" /lvm_mount

   For Btrfs:

   # snapper -c config_name create-config -f btrfs /mount-point

   • The -c config_name option specifies the name of the configuration file.
   • The create-config tells snapper to create a configuration file.
   • The -f file_system tells snapper what file system to use; if this is omitted snapper will attempt to detect the file system.
   • The /mount-point is where the subvolume or thinly-provisioned LVM2 file system is mounted.
   Alternatively, to create a configuration file called btrfs_config, on a Btrfs subvolume that is mounted at /btrfs_mount, use:

   # snapper -c btrfs_config create-config -f btrfs /btrfs_mount