proxmox ve (PVE) 增加 local 目录的大小即扩容
1T的SSD， proxmox 安装完后默认分配给了 local 目录100G，local-lvm 是900G
由于虚拟机备份文件VZDump默认是存储到local目录的，再加上上传的IOS镜像，100G很经常不够用，那怎么扩容增加空间呢？
首先 fdisk -l 命令，查看/dev/mapper/pve-root大小，下边这个是我的
Disk /dev/mapper/pve-root: 96 GiB, 103079215104 bytes, 201326592 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
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然后对 /dev/mapper/pve-root 扩容，命令如下，即增加1G的空间
lvextend -L +1G /dev/mapper/pve-root
root@xxx:/# lvextend -L +1G /dev/mapper/pve-root
Size of logical volume pve/root changed from 96.00 GiB (24576 extents) to 97.00 GiB (24832 extents).
Logical volume pve/root successfully resized.
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执行后实际大小其实是还不会变化的,还需要下边的命令, 作用是执行上边的扩容操作
resize2fs /dev/mapper/pve-root
root@xxx:/# resize2fs /dev/mapper/pve-root
resize2fs 1.44.5 (15-Dec-2018)
Filesystem at /dev/mapper/pve-root is mounted on /; on-line resizing required
old_desc_blocks = 12, new_desc_blocks = 13
The filesystem on /dev/mapper/pve-root is now 25690112 (4k) blocks long.
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以上操作结束，就可以在pve的web ui上看到空间的增加了