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Clarified section 1-1-create-vm of the tutorial.

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# 1.1. Create VM for the TeraFlowSDN controller
In this section, we install a VM to be used as the deployment, execution, and development environment for the ETSI
TeraFlowSDN controller. If you already have a remote physical server fitting the requirements specified in this section
feel free to use it instead of deploying a local VM. Other virtualization environments can also be used; in that case,
you will need to adapt these instructions to your particular case.
## 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.
## 1.1.2. Create VM in VirtualBox:
In "Oracle VM VirtualBox Manager", create a new VM with the following specifications:
- 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](https://releases.ubuntu.com/20.04/))
- 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.
## 1.1.3. 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|<empty> |
- Leave proxy and mirror addresses as they are
- Update the installer (if needed). At the time of writing this walkthrough, version 22.06.1 is the newest one.
- 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.
## 1.1.4. Upgrade the Ubuntu distribution
```bash
sudo apt-get update -y
sudo apt-get dist-upgrade -y
```
## 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:
```bash
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
```
# 1.1. Create VM for the TeraFlowSDN controller
In this section, we install a VM to be used as the deployment, execution, and development environment for the ETSI
TeraFlowSDN controller. If you already have a remote physical server fitting the requirements specified in this section
feel free to use it instead of deploying a local VM. Other virtualization environments can also be used; in that case,
you will need to adapt these instructions to your particular case.
## 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.
## 1.1.2. Create VM in VirtualBox:
In "Oracle VM VirtualBox Manager", create a new VM with the following specifications:
- 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](https://releases.ubuntu.com/20.04/))
- 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.
## 1.1.3. 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|<empty> |
- 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.
## 1.1.4. Upgrade the Ubuntu distribution
```bash
sudo apt-get update -y
sudo apt-get dist-upgrade -y
```
## 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:
```bash
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
```
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