Hello World

登入ssh, 檢查調整前硬碟狀況
root@example:~# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda      8:0    0  80G  0 disk
└─sda1   8:1    0  80G  0 part /

確定 filesystem 是否為 ext4
root@example:~# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  1.8G     0  1.8G   0% /dev
tmpfs          tmpfs     371M   76M  295M  21% /run
/dev/sda1      ext4       79G   71G  4.6G  94% /
tmpfs          tmpfs     1.9G     0  1.9G   0% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs     1.9G     0  1.9G   0% /sys/fs/cgroup

登入 gcp console，選擇要加大空間的硬碟 > 編輯 > 直接指定想要的硬碟大小，只能加大，不能縮小
假設原來是80G，想增加至 100G，直接填100G 即可，最大可擴充到64T

在gcp 介面調整硬碟大小後，sda 已經變100G
root@example:~# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0  100G  0 disk
└─sda1   8:1    0   80G  0 part /

root@example:~# parted /dev/sda
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) resizepart
Partition number? 1
Warning: Partition /dev/sda1 is being used. Are you sure you want to continue?
Yes/No? Yes
End?  [85.9GB]? 100%
(parted) quit
Information: You may need to update /etc/fstab.

root@example:~# partprobe /dev/sda

root@example:~# resize2fs /dev/sda1
resize2fs 1.43.4 (31-Jan-2017)
Filesystem at /dev/sda1 is mounted on /; on-line resizing required
old_desc_blocks = 10, new_desc_blocks = 13
The filesystem on /dev/sda1 is now 26213888 (4k) blocks long.

檢查sda1 的空間是否已經可以使用
root@example:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            1.8G     0  1.8G   0% /dev
tmpfs           371M   76M  295M  21% /run
/dev/sda1        99G   71G   24G  76% /
tmpfs           1.9G     0  1.9G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           1.9G     0  1.9G   0% /sys/fs/cgroup

root@example:~# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0  100G  0 disk
└─sda1   8:1    0  100G  0 part /

參考資料
https://cloud.google.com/compute/docs/disks/resize-persistent-disk