1-1-1-create-vm-oracle-virtualbox.md

1.1.1. Oracle VirtualBox

1.1.1.1. Create a NAT Network in VirtualBox

In "Oracle VM VirtualBox Manager", Menu "File > Preferences... > Network", create a NAT network with the following specifications:

Name	CIDR	DHCP	IPv6
TFS-NAT-Net	10.0.2.0/24	Disabled	Disabled

Within the newly created "TFS-NAT-Net" NAT network, configure the following IPv4 forwarding rules:

Name	Protocol	Host IP	Host Port	Guest IP	Guest Port
SSH	TCP	127.0.0.1	2200	10.0.2.10	22
HTTP	TCP	127.0.0.1	8080	10.0.2.10	80

Note: IP address 10.0.2.10 is the one that will be assigned to the VM.

1.1.1.2. Create VM in VirtualBox:

• Name: TFS-VM
• Type/Version: Linux / Ubuntu (64-bit)
• CPU (*): 4 vCPUs @ 100% execution capacity
• RAM: 8 GB
• Disk: 40 GB, Virtual Disk Image (VDI), Dynamically allocated
• Optical Drive ISO Image: "ubuntu-20.04.4-live-server-amd64.iso" (from Ubuntu Server 20.04 LTS)
• Network Adapter 1 (*): enabled, attached to NAT Network "TFS-NAT-Net"
• Minor adjustments (*):
  • Audio: disabled
  • Boot otder: disable "Floppy"

Note: (*) settings to be editing after the VM is created.

1.1.1.3. Install Ubuntu 20.04 LTS Operating System

In "Oracle VM VirtualBox Manager", start the VM in normal mode, and follow the installation procedure. Below we provide some installation guidelines:

• Installation Language: English
• Autodetect your keyboard
• Configure static network specifications:

Interface	IPv4 Method	Subnet	Address	Gateway	Name servers	Search domains
enp0s3	Manual	10.0.2.0/24	10.0.2.10	10.0.2.1	8.8.8.8,8.8.4.4

• Leave proxy and mirror addresses as they are
• Let the installer self-upgrade (if asked). At the time of writing this walkthrough, the version of the installer is 22.06.1. Anyway, Ubuntu 20.04 LTS OS will be installed.
• Use an entire disk for the installation
  • Disable setup of the disk as LVM group
  • Double check that NO swap space is allocated in the partition table. Kubernetes does not work properly with SWAP.
• Configure your user and system names:
  • User name: TeraFlowSDN
  • Server's name: tfs-vm
  • Username: tfs
  • Password: tfs123
• Install Open SSH Server
  • Import SSH keys, if any.
• Featured Server Snaps
  • Do not install featured server snaps. It will be done manually later to illustrate how to uninstall and reinstall them in case of trouble with.
• Let the system install and upgrade the packages.
  • This operation might take some minutes depending on how old is the Optical Drive ISO image you use and your Internet connection speed.
• Restart the VM when the installation is completed.

1.1.1.4. Upgrade the Ubuntu distribution

sudo apt-get update -y
sudo apt-get dist-upgrade -y

1.1.1.5. Install VirtualBox Guest Additions

On VirtualBox Manager, open the VM main screen. If you are running the VM in headless mode, right click over the VM in the VirtualBox Manager window and click "Show". If a dialog informing about how to leave the interface of the VM is hown, confirm pressing "Switch" button. The interface of the VM should appear.

Click menu "Device > Insert Guest Additions CD image..."

On the VM terminal, type:

sudo apt-get install -y linux-headers-$(uname -r) build-essential dkms
  # This command might take some minutes depending on your VM specs and your Internet access speed.
sudo mount /dev/cdrom /mnt/
cd /mnt/
sudo ./VBoxLinuxAdditions.run
  # This command might take some minutes depending on your VM specs.
sudo reboot