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VBOX_CONFIG.md

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How to configure VirtualBox

INSTALL VIRTUAL BOX GUEST ADDITIONS

If your CentOS image does not include VirtualBox Guest Additions then download the version of Guest Additions that matches exactly your installed VirtualBox version from here rename it to VBoxGuestAdditions.iso and place it in the same directory as Virtualbox.exe is which for Windows typically is C:\Program Files\VirtualBox.

The easiest way to get VirtualBox Guest Additions is by mean of using the vagrant-vbguest plugin. Just install the plugin before you do vagrant up

vagrant plugin install vagrant-vbguest

See also VirtualBox Guest Additions on CentOS 7.5.

To manully install or upgrade do:

sudo yum install gcc kernel-devel kernel-headers dkms make bzip2 perl
mkdir /media/VirtualBoxGuestAdditions
mount -r /dev/cdrom /media/VirtualBoxGuestAdditions
cd /media/VirtualBoxGuestAdditions
./VBoxLinuxAdditions.run

The kernel-headers and kernel-devel must match exactly the version of your installed kernel. In order to check this do: uname -r and rpm -q kernel-devel If the versions don't match then yum remove kernel-devel and kernel-headers and yum installagain with the exact version required.

REBUILD THE BASE BOX

A VirtualBox base box is required at Vagrant file vs.vm.box_url

If a box is not available, it can be created using Packer.

For building the base box, download download Packer then change to the /packer subdirectory of CentOrion.

Execute:

packer build -var-file=variables-centos-7.5.json vagrant-centos.json

This will create a base box name vagrant-centos-75.box that can be referenced from Vagrantfile.

Read more on Vagrant provisioners here.

ADD SWAP SPACE

Some applications, i.e. Oracle need a swap space bigger than the default of 1279 Mb.

If you need to increase the swap space do the following:

With the VM halted, you must add a new virtual hard disk from Virtualbox by right clicking on the machine and then Configuration -> Storage. Click on the icon of a hard drive with a + sign and add a new disk of 2Gb fixed size.

After adding the new hard disk do vagrant up machine_name

Once logged in type:

sudo vgdisplay this will display the volume group information showing something like: VG Name cl

Then execute sudo fdisk -l to list the available drives. You should get in the list /dev/hdb or /dev/sdb depending on whether you are using spinning or solid states physical drives.

Now execute:

sudo pvcreate /dev/sdb
sudo vgextend cl /dev/sdb
sudo lvextend -L+2G /dev/cl/swap

this will add 2Gb to the swap space.