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Algarrobo

A test bed for Open vSwitch experiments

Create Hosts

Prepare the ISO files to create the hosts:

cd cloud-init
docker compose -f compose-dev.yaml build app
docker compose -f compose-dev.yaml run \
    --rm --env CLOUD_INIT_HOSTNAME=host-1 --env SEED_LOCATION=./nfs/seed-1.iso app echo "Done"
docker compose -f compose-dev.yaml run \
    --rm --env CLOUD_INIT_HOSTNAME=host-2 --env SEED_LOCATION=./nfs/seed-2.iso app echo "Done"

Create the private virtual switch in Microsoft Hyper-V:

Start-Process powershell.exe -Verb RunAs
New-VMSwitch -Name "Private Switch" -SwitchType private

Create the hosts in Microsoft Hyper-V:

.\scripts\create-vm.ps1 -vm "host-1" `
    -image "$pwd\cloud-init\nfs\ubuntu-22.04.4-live-server-amd64.iso" `
    -seed "$pwd\cloud-init\nfs\seed-1.iso"
.\scripts\create-vm.ps1 `
    -vm "host-2" `
    -image "$pwd\cloud-init\nfs\ubuntu-22.04.4-live-server-amd64.iso" `
    -seed "$pwd\cloud-init\nfs\seed-2.iso"

Configure Hosts

Create the Ansible Controller:

cd ansible
docker compose -f compose-dev.yaml build app
docker compose -f compose-dev.yaml run app bash

Install Ansible Controller dependencies:

ansible-galaxy install -r /usr/src/app/requirements.yml

Create an ssh key for the Ansible Controller:

ssh-keygen

Or use an existing private key in the Ansible Controller:

cp .ssh/id_rsa ~/.ssh/id_rsa
chmod 600 ~/.ssh/id_rsa
ssh-keygen -f ~/.ssh/id_rsa -y > ~/.ssh/id_rsa.pub

Copy the key to the hosts:

ssh-copy-id ubuntu@host-1
ssh-copy-id ubuntu@host-2

Verify that the hosts are reachable:

ansible -i hosts.ini -m ping all

Set static ip address for host-1

ssh host-1
sudo su

{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    eth1:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 192.168.0.2/24"
} > /etc/netplan/01-netcfg.yaml
chmod 600 /etc/netplan/01-netcfg.yaml
netplan apply
exit

Set static ip address for host-2

ssh host-1
sudo su

{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    eth1:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 192.168.0.3/24"
} > /etc/netplan/01-netcfg.yaml
chmod 600 /etc/netplan/01-netcfg.yaml
netplan apply
exit

Perform initial hosts setup:

ansible-playbook -i hosts.ini site.yml -t init -K

Complete host setup:

ansible-playbook -i hosts.ini site.yml

Note: VMs are deployed from a template that is expected to be located at ./ansible/files/vm.qcow2. In the case that this is not there, the following section explains how to setup the VMs from an Ubuntu ISO.

Manual VMs provisioning in Hosts

Transfer Ubuntu ISO for VM Provisioning

scp ./cloud-init/nfs/ubuntu-22.04.4-live-server-amd64.iso \
    [email protected]:/tmp/ubuntu-22.04.4-live-server-amd64.iso
scp ./cloud-init/nfs/ubuntu-22.04.4-live-server-amd64.iso \
    [email protected]:/tmp/ubuntu-22.04.4-live-server-amd64.iso

Install vm-1 in host-1

ssh host-1
sudo virt-install \
    --name vm-1 \
    --os-variant ubuntu22.04 \
    --vcpus 3 \
    --memory 2000 \
    --location /opt/ubuntu-22.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd \
    --network bridge=virbr0,model=virtio \
    --disk size=5 \
    --graphics none \
    --extra-args='console=ttyS0,115200n8 -- console=ttyS0,115200n8' \
    --debug

Install vm-2 in host-1

ssh host-1
sudo virt-install \
    --name vm-2 \
    --os-variant ubuntu22.04 \
    --vcpus 3 \
    --memory 2000 \
    --location /opt/ubuntu-22.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd \
    --network bridge=virbr0,model=virtio \
    --disk size=5 \
    --graphics none \
    --extra-args='console=ttyS0,115200n8 -- console=ttyS0,115200n8' \
    --debug

Install vm-3 in host-2

ssh host-1
sudo virt-install \
    --name vm-3 \
    --os-variant ubuntu22.04 \
    --vcpus 3 \
    --memory 2000 \
    --location /opt/ubuntu-22.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd \
    --network bridge=virbr0,model=virtio \
    --disk size=5 \
    --graphics none \
    --extra-args='console=ttyS0,115200n8 -- console=ttyS0,115200n8' \
    --debug

Install vm-4 in host-2

ssh host-1
sudo virt-install \
    --name vm-2 \
    --os-variant ubuntu22.04 \
    --vcpus 3 \
    --memory 2000 \
    --location /opt/ubuntu-22.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd \
    --network bridge=virbr0,model=virtio \
    --disk size=5 \
    --graphics none \
    --extra-args='console=ttyS0,115200n8 -- console=ttyS0,115200n8' \
    --debug

Complete VMs configuration

Configuration for vm-1

# SSH into the host
ssh host-1

# Open console to vm
sudo virsh console vm-1

# Elevate to root
sudo su

# Generate host keys for ssh
ssh-keygen -A

# Extend disk to all free space
lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
resize2fs /dev/ubuntu-vg/ubuntu-lv

# Set hostname
hostnamectl set-hostname vm-1

# Set static ip address
{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    enp1s0:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 10.10.10.10/24"
} > /etc/netplan/01-netcfg.yaml

# Fix permissions of netcfg
chmod 600 /etc/netplan/01-netcfg.yaml

# Apply
netplan apply

Configuration for vm-2

# SSH into the host
ssh host-1

# Open console to vm
sudo virsh console vm-2

# Elevate to root
sudo su

# Generate host keys for ssh
ssh-keygen -A

# Extend disk to all free space
lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
resize2fs /dev/ubuntu-vg/ubuntu-lv

# Set hostname
hostnamectl set-hostname vm-1

# Set static ip address
{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    enp1s0:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 10.10.10.20/24"
} > /etc/netplan/01-netcfg.yaml

# Fix permissions of netcfg
chmod 600 /etc/netplan/01-netcfg.yaml

# Apply
netplan apply

Configuration for vm-3

# SSH into the host
ssh host-2

# Open console to vm
sudo virsh console vm-3

# Elevate to root
sudo su

# Generate host keys for ssh
ssh-keygen -A

# Extend disk to all free space
lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
resize2fs /dev/ubuntu-vg/ubuntu-lv

# Set hostname
hostnamectl set-hostname vm-1

# Set static ip address
{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    enp1s0:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 10.10.10.30/24"
} > /etc/netplan/01-netcfg.yaml

# Fix permissions of netcfg
chmod 600 /etc/netplan/01-netcfg.yaml

# Apply
netplan apply

Configuration for vm-4

# SSH into the host
ssh host-2

# Open console to vm
sudo virsh console vm-4

# Elevate to root
sudo su

# Generate host keys for ssh
ssh-keygen -A

# Extend disk to all free space
lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
resize2fs /dev/ubuntu-vg/ubuntu-lv

# Set hostname
hostnamectl set-hostname vm-1

# Set static ip address
{
    echo "network:"
    echo "  version: 2"
    echo "  renderer: networkd"
    echo "  ethernets:"
    echo "    enp1s0:"
    echo "      dhcp4: no"
    echo "      addresses:"
    echo "        - 10.10.10.40/24"
} > /etc/netplan/01-netcfg.yaml

# Fix permissions of netcfg
chmod 600 /etc/netplan/01-netcfg.yaml

# Apply
netplan apply

Tests the VMs

The tools required on the vms to run network tests the following:

apt update && apt install inetutils-ping iperf3 net-tools nano

Check the state of the virtual switch

ovs-vsctl show

Output will be something like:

b6e1b292-6f1d-4ab3-bf1a-006e96a5fae9
    Bridge ovsbr
        Port gre0
            Interface gre0
                type: gre
                options: {remote_ip="192.168.0.3"}
        Port ovsbr
            Interface ovsbr
                type: internal
        Port vnet0
            Interface vnet0
        Port vnet1
            Interface vnet1
    ovs_version: "2.17.8"

Get the vnet of an specific vm:

virsh dumpxml vm-1 | grep vnet

Apply a vlan tag to the vnet:

ovs-vsctl set port vnet1 tag=100

Run ping connectivity test:

ping 10.10.10.10

Run iperf3 bandwidth test:

# In the server:
sudo iperf3 -s

# In the client, tcp test:
sudo iperf3 -c 10.10.10.10 -P 2 -t 10 -b 1G

# In the client, udp test:
sudo iperf3 -c 10.10.10.10 -P 2 -t 10 -b 1G -u

Destroy the hosts

.\scripts\destroy-vm.ps1 -vm "host-1"
.\scripts\destroy-vm.ps1 -vm "host-2"

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