Updated on 2025-02-01

This is a continuation of my private cloud project.

Ubuntu server

Installing Ubuntu ISO on server

First I need to download an Ubuntu 24.04 ISO in order to install it on the host server. This can be done from the following link. The idea is to do an installation of this OS with the minimun required packages. I am not going to enter into further details about how I did this instalation.

Setting up the Host

User creation

After the OS is installed from my main user I am going to create a new user and add my public keys to it. Also I want to add this user to the sudoers group and allow to execute sudo without a password (because we are not going to set one).

sudo su
adduser --disabled-password openstack
usermod -aG sudo openstack
visudo

# There add the following line at the end
openstack ALL=(ALL) NOPASSWD:ALL

# Add my public ssh key to authorized keys file.
echo "my_key" >> /home/openstack/.ssh/authorized_keys

I am going to add this server as an alias into my ssh config file (~/.ssh/config) so it’s easier to enter to my OpenStack instance.

Host mc-cloud-openstack-1
  Hostname 192.168.0.150
  User openstack

Now I can login to my server simply by typing ssh mc-cloud-openstack-1.

Networking

In order for OpenStack to work correctly in one host with only one network device we need to make some changes to the netplan configuration to add a bridge with two ethernet devices.

First let’s create the bridge with a static ip by adding the following to our /etc/netplan/*.yaml file. Also we are going to add the physical interface.

network:
  version: 2
  ethernets:
    enp4s0:
      dhcp4: no
  bridges:
    br0:
      addresses:
        - 192.168.0.150/24
      gateway4: 192.168.0.1
      nameservers:
        addresses: [192.168.0.1]
      interfaces:
        - enp4s0

Apply the plan.

sudo netplan apply

Now create the following file /lib/systemd/network/25-veth-b1.netdev with the following content. This will create the a virtual ethernet device where veth1 is one “end” of the device and veth2 is the other “end”.

[NetDev]
Name=veth1
Kind=veth
[Peer]
Name=veth2

Now restart the systemd service.

sudo systemctl restart systemd-networkd

It’s time to edit the /etc/netplan/*.yaml file by adding the new veths. Remember to add one end of the veth to the bridge in order to connect it to neutron network later.

network:
  version: 2
  ethernets:
    enp4s0:
      dhcp4: no
    veth1: {}
    veth2: {}
  bridges:
    br0:
      addresses:
        - 192.168.0.150/24
      gateway4: 192.168.0.1
      nameservers:
        addresses: [192.168.0.1]
      interfaces:
        - veth1
        - enp4s0

Apply the changes.

sudo netplan apply

Network is now ready for installing OpenStack.

OpenStack installation

In the following steps I am going to install the required packages for deploying OpenStack using Kolla-Ansible.

First I am going to install direnv and pyenv.

sudo apt-get install direnv python3.10-venv python3-pip

Next we have to add direnv hooks to our shell and restart.

direnv hook bash >> ~/.bashrc
exit

Now back again in the host create a new directory to start working in the deployment.

mkdir kolla-ansible && cd kolla-ansible
echo "layout python3" > .envrc
direnv allow

Install OpenStack requirements.

# Install openstack dependencies
sudo apt install git python3-dev libffi-dev gcc libssl-dev build-essential libdbus-1-dev libglib2.0-dev
# Create requirements.txt file
cat > requirements.txt << EOF
ansible-core>=2.16,<2.19
git+https://opendev.org/openstack/[email protected]
python-openstackclient==7.1.4
docker==7.1.0
dbus-python==1.3.2
EOF

# Install pip packages
pip3 install -r requirements.txt

Create kolla directory.

sudo mkdir /etc/kolla
sudo chown $USER:$USER /etc/kolla

Then we have to copy etc files and main inventory.

# Copy default etc kolla files
cp -r .direnv/python-3.xx/share/kolla-ansible/etc_examples/kolla/* /etc/kolla
# Copy default all-in-one inventory
cp -r .direnv/python-3.xx/share/kolla-ansible/ansible/inventory/all-in-one .

Now we are going to configure globals file. We only need to set the following values.

vim /etc/kolla/globals.yml

Values to change.

kolla_base_distro: "ubuntu"
kolla_internal_vip_address: "192.168.0.151"
network_interface: "br0"
neutron_external_interface: "veth2"

Generate default passwords

kolla-genpwd

Install OpenStack using kolla-ansible.

kolla-ansible install-deps
kolla-ansible bootstrap-servers -i ./all-in-one 
kolla-ansible prechecks -i ./all-in-one 
kolla-ansible deploy -i ./all-in-one 
kolla-ansible post-deploy -i ./all-in-one 

# You can use this command if you want to initialize the admin project with some
# examples
.direnv/python-3.xx/share/kolla-ansible/init-runonce

Now we can access the gui using kolla internal vip address. For this you need to extract the password from /etc/kolla/passwords.yml.

Openstack resources

External network

On the Openstack interface go to Admin>Network. There we are going to need a external network with the following configuration in order to use our local network to access the internet.

provider type: flat
physical network: physnet1
external network: enabled

Router

We need to create a new router selecting our previously created network.

Project and users

Create a new project and a new user to separate from the admin one. Once you have a new project, everytime you create a new network that you need to access the internet you can add an interface in the router.

Conclusion

Let’s see how this goes in the next post. You can also check the previous one if you want.

Ubuntu server#

Installing Ubuntu ISO on server#

Setting up the Host#

User creation#

Networking#

OpenStack installation#

Openstack resources#

External network#

Router#

Project and users#

Conclusion#