Vagrant, how to specify the disk size?

I want to make sure that my development environment has enough free space to install tools and other stuff. I can't find any configuration option about telling to Vagrant the minimum disk size that I want. Is this possible or I need to create my own box?

I have used the vagrant plugin vagrant-disksize to resize the disk.

It worked. It can also help to specify the initial disk size.

Run the following at the command line:

vagrant plugin install vagrant-disksize

and use the following in your Vagrantfile:

vagrant.configure('2') do |config|
    config.vm.box = 'ubuntu/xenial64'
    config.disksize.size = '50GB'
end

Install Vagrant plugin vagrant-disksize

vagrant plugin install vagrant-disksize

If you want to make sure user has the plugin installed, when starting vagrant, you can add this in the beginning of Vagrantfile

# Install vagrant-disksize to allow resizing the vagrant box disk.
unless Vagrant.has_plugin?("vagrant-disksize")
    raise  Vagrant::Errors::VagrantError.new, "vagrant-disksize plugin is missing. Please install it using 'vagrant plugin install vagrant-disksize' and rerun 'vagrant up'"
end

Set desired disk size in Vagrantfile

vagrant.configure('2') do |config|
    config.disksize.size = '50GB'
end

Updating existing vagrant box

1. Do all of the above
2. Run vagrant halt & vagrant up (You should see something like "Resized disk: old 32768 MB, req 51200 MB, new 51200 MB")
3. SSH to vagrant box
4. Run sudo cfdisk /dev/sda
5. Use arrows to select your disk probably sdaX. Mine was sda3.
6. Then select resize using arrow keys. Accept the suggested disk size.
7. Then select write. And answer yes.
8. You can select quit now.
9. Run sudo resize2fs -p -F /dev/sdaX You should see something like: "Filesystem at /dev/sda3 is mounted on /; on-line resizing required old_desc_blocks = 4, new_desc_blocks = 6 The filesystem on /dev/sda3 is now 11933952 (4k) blocks long. "
10. Run df and see that your disk size has increased.

If your vagrant box uses LVM and is already created, additional steps are required compared to the answer of Firze:

• Install Vagrant plugin vagrant-disksize

vagrant plugin install vagrant-disksize

• Set desired disk size in Vagrantfile

vagrant.configure('2') do |config|
    config.disksize.size = '300GB'
end

• Reboot the vagrant box (You should see something like "Resized disk...")

vagrant hatl
vagrant up

• SSH to the vagrant box

• Check the old size with vgdisplay:

vgdisplay
  --- Volume group ---
  VG Name               vagrant-vg
  System ID             
  Format                lvm2
  ...
  Alloc PE / Size       16200 / 63.28 GiB
  Free  PE / Size       0 / 0  

• Assuming that the device is /dev/sda you have to resize the extended and logic partition:

parted /dev/sda
p
Number  Start   End     Size    Type      File system  Flags
 1      1049kB  768MB   767MB   primary   ext2         boot
 2      769MB   68.7GB  67.9GB  extended
 5      769MB   68.7GB  67.9GB  logical                lvm

resizepart 2 321GB
resizepart 5 321GB
p
Number  Start   End    Size   Type      File system  Flags
 1      1049kB  768MB  767MB  primary   ext2         boot
 2      769MB   322GB  321GB  extended
 5      769MB   321GB  320GB  logical                lvm
quit

• Then, LVM should see the modification:

pvresize /dev/sda5

vgdisplay
  Alloc PE / Size       16200 / 63.28 GiB
  Free  PE / Size       60148 / 234.95 GiB

• Extend the LVM group:

lvextend  -L+234.95 /dev/vagrant-vg/root 
  Size of logical volume vagrant-vg/root changed from 62.32 GiB (15955 extents) to 297.27 GiB (76102 extents).
  Logical volume root successfully resized.

vgdisplay
  Alloc PE / Size       76347 / 298.23 GiB
  Free  PE / Size       1 / 4.00 MiB

• Finally, resize the filesystem:

resize2fs /dev/vagrant-vg/root

df -h
/dev/mapper/vagrant--vg-root  293G   59G  222G  21% /

This should be done using the provider, i.e the virtualbox configuration settings example would be

https://www.vagrantup.com/docs/virtualbox/configuration.html

config.vm.provider "virtualbox" do |v| v.customize ["modifyvm", :id, "--cpuexecutioncap", "50"] end

https://www.virtualbox.org/manual/ch08.html#vboxmanage-list

but in modifyvm section i dont see anything relating to the disk resize !!maybe you can try and attach a secondary disk !!

https://gist.github.com/leifg/4713995