openwrt（lede）默认磁盘大小就300多M，打日志监控打开，没多久就满了，因此需要做硬盘扩容，但更确切的说，应该是新磁盘挂载！
proxmox部署openwrt(lede)在网上已经有一大堆的教程，这里就不再说明了，直接进入硬盘扩容操作方法！
1 现象说明
pve自带的硬盘扩大，相信大家都已经会操作了，这里就不多说了；
Disk /dev/sda: 40.34 GiB，我在pve上面扩容了40G，但实际上/overlay，还是只有170MB
root@OpenWrt:~# fdisk -l
Disk /dev/loop0: 172.83 MiB, 181207040 bytes, 353920 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
GPT PMBR size mismatch (689214 != 84582399) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.
Disk /dev/sda: 40.34 GiB, 43306188800 bytes, 84582400 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: D2255BC7-A8A7-FBE0-565F-0F2EB9A09D00
Device Start End Sectors Size Type
/dev/sda1 512 33279 32768 16M EFI System
/dev/sda2 33792 689151 655360 320M Microsoft basic data
/dev/sda128 34 511 478 239K BIOS boot
Partition table entries are not in disk order.
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 147.3M 147.3M 0 100% /rom
tmpfs 996.0M 8.7M 987.3M 1% /tmp
/dev/loop0 170.8M 79.7M 91.1M 47% /overlay
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
tmpfs 512.0K 0 512.0K 0% /dev
cgroup 996.0M 0 996.0M 0% /sys/fs/cgroup
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /opt/docker
2 新建磁盘分区
进入对应硬盘创建分区
root@OpenWrt:~# fdisk /dev/sda
Welcome to fdisk (util-linux 2.35.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
GPT PMBR size mismatch (689214 != 84582399) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.
Command (m for help): m #查看各命令所代表的意思
Help:
GPT
M enter protective/hybrid MBR
Generic
d delete a partition
F list free unpartitioned space
l list known partition types
n add a new partition
p print the partition table
t change a partition type
v verify the partition table
i print information about a partition
Misc
m print this menu
x extra functionality (experts only)
Script
I load disk layout from sfdisk script file
O dump disk layout to sfdisk script file
Save & Exit
w write table to disk and exit
q quit without saving changes
Create a new label
g create a new empty GPT partition table
G create a new empty SGI (IRIX) partition table
o create a new empty DOS partition table
s create a new empty Sun partition table
Command (m for help): n #新建分区
Partition number (3-127, default 3): #回车，默认
First sector (33280-84582366, default 690176):#回车，默认
Last sector, +/-sectors or +/-size{K,M,G,T,P} (690176-84582366, default 84582366):#回车，默认
Created a new partition 3 of type 'Linux filesystem' and of size 40 GiB.
Command (m for help): w #保存退出
The partition table has been altered.
Syncing disks.
校验分区是否创建成功
root@OpenWrt:~# fdisk -l
Disk /dev/loop0: 172.83 MiB, 181207040 bytes, 353920 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
Disk /dev/sda: 40.34 GiB, 43306188800 bytes, 84582400 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: D2255BC7-A8A7-FBE0-565F-0F2EB9A09D00
Device Start End Sectors Size Type
/dev/sda1 512 33279 32768 16M EFI System
/dev/sda2 33792 689151 655360 320M Microsoft basic data
/dev/sda3 690176 84582366 83892191 40G Linux filesystem #为新建分区
/dev/sda128 34 511 478 239K BIOS boot
Partition table entries are not in disk order.
格式化新建分区，将新创建的分区格式化为ext4格式
root@OpenWrt:~# mkfs.ext4 /dev/sda3
mke2fs 1.45.6 (20-Mar-2020)
Discarding device blocks: done
Creating filesystem with 10486523 4k blocks and 2624496 inodes
Filesystem UUID: 29bce85b-1de1-4b63-880e-45c318c50086
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624
Allocating group tables: done
Writing inode tables: done
Creating journal (65536 blocks): done
Writing superblocks and filesystem accounting information: done
3 替换/overlay分区
临时挂载新建分区
root@OpenWrt:~# mount -t ext4 /dev/sda3 /mnt/sda3
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 147.3M 147.3M 0 100% /rom
tmpfs 996.0M 8.9M 987.1M 1% /tmp
/dev/loop0 170.8M 79.7M 91.1M 47% /overlay
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
tmpfs 512.0K 0 512.0K 0% /dev
cgroup 996.0M 0 996.0M 0% /sys/fs/cgroup
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /opt/docker
/dev/sda3 39.1G 48.0M 37.1G 0% /mnt/sda3
复制overlay数据进/dev/sda3
root@OpenWrt:~# cp -r /overlay/* /mnt/sda3
root@OpenWrt:~#
设置开机自动挂载/dev/sda3，不会的参考以下截图
vi /etc/rc.local
# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.
echo 1 > /sys/fs/cgroup/memory/memory.use_hierarchy
#添加以下这句挂载命令
mount /dev/sda3 /overlay
exit 0
使用TTYD终端进行编辑文件
设置完成后，重启openwrt验证
root@OpenWrt:~# reboot
4 校验是否替换成功
查看磁盘分区已生效
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 147.3M 147.3M 0 100% /rom
tmpfs 996.0M 7.9M 988.1M 1% /tmp
/dev/loop0 39.1G 54.4M 37.1G 0% /overlay #已变化
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
/dev/sda1 16.0M 5.4M 10.5M 34% /boot
tmpfs 512.0K 0 512.0K 0% /dev
cgroup 996.0M 0 996.0M 0% /sys/fs/cgroup
/dev/sda3 39.1G 54.4M 37.1G 0% /mnt/sda3
/dev/sda3 39.1G 54.4M 37.1G 0% /overlay
overlayfs:/overlay 170.8M 79.7M 91.1M 47% /opt/docker
查看openwrt
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