Google Cloud Compute ubuntu growpart command says "could only be grown by -33 [fudge=2048]"

Solution 1:

I've tried to follow the same documentation Resizing a zonal persistent disk:

1. create test VM instance with Ubuntu 18.04 LTS with 10GB disk:

   $ cat /etc/lsb-release 
   DISTRIB_ID=Ubuntu
   DISTRIB_RELEASE=18.04
   DISTRIB_CODENAME=bionic
   DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"
   

2. check available disk space first:

   $ df -h
   Filesystem      Size  Used Avail Use% Mounted on
   udev            1.8G     0  1.8G   0% /dev
   tmpfs           369M  884K  369M   1% /run
   /dev/sda1       9.6G  1.2G  8.4G  13% /
   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
   /dev/sda15      105M  3.6M  101M   4% /boot/efi
   /dev/loop0       92M   92M     0 100% /snap/core/8689
   /dev/loop1       93M   93M     0 100% /snap/google-cloud-sdk/122
   tmpfs           369M     0  369M   0% /run/user/1001
   

3. increase disk space up to 20GB in Console or via gcloud command:

   $ gcloud compute disks resize disk-resize --size 20GB --zone europe-west3-a
   

4. install growpart:

   $ sudo apt -y install cloud-guest-utils 
   

5. grow the partition:

   $ sudo growpart /dev/sda 1
   CHANGED: partition=1 start=227328 old: size=20744159 end=20971487 new: size=41715679,end=41943007
   

6. extend the file system (ext4) on the disk to use the added space:

   $ sudo resize2fs /dev/sda1
   resize2fs 1.44.1 (24-Mar-2018)
   Filesystem at /dev/sda1 is mounted on /; on-line resizing required
   old_desc_blocks = 2, new_desc_blocks = 3
   The filesystem on /dev/sda1 is now 5214459 (4k) blocks long.
   

7. check available disk space:

   $ df -h
   Filesystem      Size  Used Avail Use% Mounted on
   udev            1.8G     0  1.8G   0% /dev
   tmpfs           369M  892K  369M   1% /run
   /dev/sda1        20G  1.4G   18G   7% /
   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
   /dev/sda15      105M  3.6M  101M   4% /boot/efi
   /dev/loop0       92M   92M     0 100% /snap/core/8689
   /dev/loop1       93M   93M     0 100% /snap/google-cloud-sdk/122
   tmpfs           369M     0  369M   0% /run/user/1001
   

Let's compare:

• before:

  /dev/sda1       9.6G  1.2G  8.4G  13% /
  

• after:

  /dev/sda1        20G  1.4G   18G   7% /
  

To solve your issue:

• compare your steps to mine
• check if you have required permissions
• check if you resized disk of VM on step 3 via Console before step 5
• check new size of your disk it shouldn't be more than 2TB accordingly to documentation:

Note: Boot disks use MBR partitions, which are limited to 2 TB in size. Do not resize boot disks beyond 2 TB.

In addition, have a look at this example.