Resizing a volume on OpenStack and making it available in your machine

shell-log

Oswald:authentication thatcher$ os volume list
+--------------------------------------+--------------------------------------------------------------------------------------------+-----------+------+-------------------------------------------------------+
| ID                                   | Name                                                                                       | Status    | Size | Attached to                                           |
+--------------------------------------+--------------------------------------------------------------------------------------------+-----------+------+-------------------------------------------------------+
| f04e5683-6a67-4208-b4b4-9c6d544d41db |                                                                                            | in-use    |   20 | Attached to wireguard-vpn on /dev/vda                 |
+--------------------------------------+--------------------------------------------------------------------------------------------+-----------+------+-------------------------------------------------------+
Oswald:authentication thatcher$ openstack --os-volume-api-version 3.42 volume set --size 28 f04e5683-6a67-4208-b4b4-9c6d544d41db
Oswald:authentication thatcher$ ssh vpn
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-42-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Tue Mar 23 15:45:51 UTC 2021

  System load:  0.0                Processes:             108
  Usage of /:   16.9% of 19.21GB   Users logged in:       0
  Memory usage: 24%                IPv4 address for ens3: 195.114.30.163
  Swap usage:   0%                 IPv4 address for wg0:  10.0.42.1

 * Introducing self-healing high availability clusters in MicroK8s.
   Simple, hardened, Kubernetes for production, from RaspberryPi to DC.

     https://microk8s.io/high-availability

90 updates can be installed immediately.
0 of these updates are security updates.
To see these additional updates run: apt list --upgradable


*** System restart required ***
Last login: Thu Mar 11 16:48:20 2021 from 94.157.182.79
ubuntu@wireguard-vpn:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            474M     0  474M   0% /dev
tmpfs            99M  980K   98M   1% /run
/dev/vda1        20G  3.3G   16G  17% /
tmpfs           491M     0  491M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           491M     0  491M   0% /sys/fs/cgroup
/dev/vda15      105M  3.9M  101M   4% /boot/efi
/dev/loop1       56M   56M     0 100% /snap/core18/1885
/dev/loop4       56M   56M     0 100% /snap/core18/1988
/dev/loop5       70M   70M     0 100% /snap/lxd/19188
/dev/loop6       33M   33M     0 100% /snap/snapd/11107
tmpfs            99M     0   99M   0% /run/user/1000
/dev/loop0       71M   71M     0 100% /snap/lxd/19647
/dev/loop2       33M   33M     0 100% /snap/snapd/11402
ubuntu@wireguard-vpn:~$ sudo resize2fs /dev/vda1
resize2fs 1.45.5 (07-Jan-2020)
The filesystem is already 5213954 (4k) blocks long.  Nothing to do!

ubuntu@wireguard-vpn:~$ sudo resize2fs /dev/vda
resize2fs 1.45.5 (07-Jan-2020)
resize2fs: Device or resource busy while trying to open /dev/vda
Couldn't find valid filesystem superblock.

ubuntu@wireguard-vpn:~$ sudo apt install fdisk
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  fdisk
1 upgraded, 0 newly installed, 0 to remove and 94 not upgraded.
Need to get 119 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://europe-nl-ams1.clouds.archive.ubuntu.com/ubuntu focal-updates/main amd64 fdisk amd64 2.34-0.1ubuntu9.1 [119 kB]
Fetched 119 kB in 1s (236 kB/s)
(Reading database ... 171942 files and directories currently installed.)
Preparing to unpack .../fdisk_2.34-0.1ubuntu9.1_amd64.deb ...
Unpacking fdisk (2.34-0.1ubuntu9.1) over (2.34-0.1ubuntu9) ...
Setting up fdisk (2.34-0.1ubuntu9.1) ...
Processing triggers for man-db (2.9.1-1) ...
ubuntu@wireguard-vpn:~$ sudo fdisk /dev/vda

Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

GPT PMBR size mismatch (41938999 != 58720255) 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

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): p

Disk /dev/vda: 28 GiB, 30064771072 bytes, 58720256 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
Disklabel type: gpt
Disk identifier: 28F14FE7-A959-452C-B0A2-266A3C37C1EB

Device      Start      End  Sectors  Size Type
/dev/vda1  227328 41938966 41711639 19.9G Linux filesystem
/dev/vda14   2048    10239     8192    4M BIOS boot
/dev/vda15  10240   227327   217088  106M EFI System

Partition table entries are not in disk order.

Command (m for help): d
Partition number (1,14,15, default 15): 1

Partition 1 has been deleted.

Command (m for help): n
Partition number (1-13,16-128, default 1): 1
First sector (34-58720222, default 227328): 
Last sector, +/-sectors or +/-size{K,M,G,T,P} (227328-58720222, default 58720222): 

Created a new partition 1 of type 'Linux filesystem' and of size 27.9 GiB.
Partition #1 contains a ext4 signature.

Do you want to remove the signature? [Y]es/[N]o: n

Command (m for help): p

Disk /dev/vda: 28 GiB, 30064771072 bytes, 58720256 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
Disklabel type: gpt
Disk identifier: 28F14FE7-A959-452C-B0A2-266A3C37C1EB

Device      Start      End  Sectors  Size Type
/dev/vda1  227328 58720222 58492895 27.9G Linux filesystem
/dev/vda14   2048    10239     8192    4M BIOS boot
/dev/vda15  10240   227327   217088  106M EFI System

Partition table entries are not in disk order.

Command (m for help): w
The partition table has been altered.
Syncing disks.

ubuntu@wireguard-vpn:~$ sudo resize2fs /dev/vda1
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 4
The filesystem on /dev/vda1 is now 7311611 (4k) blocks long.

ubuntu@wireguard-vpn:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            474M     0  474M   0% /dev
tmpfs            99M  984K   98M   1% /run
/dev/vda1        27G  3.3G   24G  13% /
tmpfs           491M     0  491M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           491M     0  491M   0% /sys/fs/cgroup
/dev/vda15      105M  3.9M  101M   4% /boot/efi
/dev/loop1       56M   56M     0 100% /snap/core18/1885
/dev/loop4       56M   56M     0 100% /snap/core18/1988
/dev/loop5       70M   70M     0 100% /snap/lxd/19188
/dev/loop6       33M   33M     0 100% /snap/snapd/11107
tmpfs            99M     0   99M   0% /run/user/1000
/dev/loop0       71M   71M     0 100% /snap/lxd/19647
/dev/loop2       33M   33M     0 100% /snap/snapd/11402