Disk expansion base on LVM

The operation of disk in linux is based on lvm, This is a set of tools related to disk expansion.

1. Create a virtual block device from the current filesystem space

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Code: CreateLvm.sh
  (1). dd if=/dev/zero of=${LOOP_PATH} bs=${LOOP_UNIT} count=${LOOP_SIZE}  // generate memory file
  (2). losetup  // Virtualize a file into a block device
  (3). vgcreate --> lvcreate --> mkfs.xfs --> mount -a
  (4). CreateService(code func)  // system service

1. added disk is expanded based on an existing logical volume

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Code: DiskExp.py
    Script command set:
      parted (>2GB) or fdisk --> Create disk partition
      mkfs.xfs -f partition --> format new partition
      pvcreate --> Create a physical volume group
      vgextend --> Add physical volume space to volume group
      lvextend --> Add idle PEFREE to the logical volume through lvextend
      
      resize2fs (ext)/xfs_growfs (xfs) --> Sync file system

2. Create a logical volume based on a new single disk, and create a raid1 volume with dual disks

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 Code: initraid1
    Through code or view code comments

3. expect script to create partitions interactively

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Code: DiskPartedTool
  nothing to say

init