Full Guide : Openstack Cloud Deployment With 2 AZs Using Kolla Ansible For CentOS / Rocky

1. Minimal Environment

• 1 controller node (controller01)
• 2 compute nodes (compute01 to compute02)
• Optional: 1 storage node
• All nodes should have:
• Rocky 9, CentOS Stream 9, Ubuntu 22.04, or Debian 12
• At least 2 CPUs and 4 GB RAM (preferably more for controller)
• Internet access or a local mirror
• Enable the virtualization in both compute nodes

2. Configure Static IPs on VMs

• For the second NIC ( ens192 ) : Disable the IPv4 & IPv6

• Note : The primary user in all amchines must be the kolla user that was created.

3. Set Hostnames and Networking in ( /etc/hosts )

4. Set The Hostnames on the 3 Machines

5.Install Dependencies on Controller Host

# Ensure the latest version of pip is installed
pip install -U pip

# update the system 
sudo dnf update 

# install dependencies 
sudo dnf install git python3-devel libffi-devel gcc openssl-devel python3-libselinux

6. Add User ( on the 3 machines : controller , 2 compute nodes )

• Note : This step is required only if a different user was created during the VM configuration at the beggining. If the kolla user was created initially ( upon VM configuration before OS installation ), you can skip this step.

su - 
adduser kolla
usermod -aG wheel kolla
passwd kolla ( Then Enter the kolla user password )
echo “kolla ALL=(ALL) NOPASSWD:ALL” | tee /etc/sudoers.d/kolla

7. Generate SSH key in Controller Node ( To Be Able To SSH To Compute Nodes )

ssh-keygen

8. Copy Public SSH ID on Controller Host to Both of Compute Codes

ssh-copy-id -i /home/controller/.ssh/id_rsa.pub kolla@compute1 → Then enter yes

ssh-copy-id -i /home/controller/.ssh/id_rsa.pub kolla@compute2 → Then enter yes

9. Try to SSH From Controller to Compute Nodes

• Note : Ensure that the sshd service is active in all machines ( systemctl status sshd ) and try to ssh from controller to compute nodes

ssh kolla@compute01

ssh kolla@compute02

10. Install Kolla-ansible

A. Install Kolla Ansible Package using pip3 :

pip3 installl kolla-ansible

B. Create the /etc/kolla directory :

sudo mkdir -p /etc/kolla

sudo chown $USER:$USER /etc/kolla

C. Copy globals.yml and passwords.yml to /etc/kolla directory :

cp -r /home/kolla/.local/share/kolla-ansible/etc_examples/kolla/* /etc/kolla

ansible --version

D. Copy multinode inventory file to the current directory :

cp /home/kolla/.local/share/kolla-ansible/ansible/inventory/multinode .

kolla-ansible --version

11. Install Ansible Galaxy requirements

kolla-ansible install-deps

12. Edit The Inventory File ( MultiAZ/inventory/multinode )

• Edit These Parts :

[control]
controller

[network]
controller

[compute]
compute01
compute02

[monitoring]
controller


[storage]
controller

13. Kolla Passwords

kolla-genpwd

14. Edit main configuration file for Kolla Ansible in etc/kolla/globals.yml

• Add this part at the beggining of the file :

workaround_ansible_issue_8743: yes
config_strategy: "COPY_ALWAYS"
kolla_base_distro: "rocky"
openstack_release: "2024.2"
network_interface: "ens160"
neutron_external_interface: "ens192"
kolla_internal_vip_address: "192.168.142.160"
kolla_container_engine: docker
docker_configure_for_zun: "yes"
containerd_configure_for_zun: "yes"
docker_apt_package_pin: "5:20.*"
network_address_family: "ipv4"
neutron_plugin_agent: "openvswitch"
enable_openstack_core: "yes"
enable_glance: "{{ enable_openstack_core | bool }}"
enable_haproxy: "yes"
enable_keepalived: "{{ enable_haproxy | bool }}"
enable_keystone: "{{ enable_openstack_core | bool }}"
enable_mariadb: "yes"
enable_memcached: "yes"
enable_neutron: "{{ enable_openstack_core | bool }}"
enable_nova: "{{ enable_openstack_core | bool }}"
enable_aodh: "yes"
enable_etcd: "yes"
enable_gnocchi: "yes"
enable_gnocchi_statsd: "yes"
enable_heat: "{{ enable_openstack_core | bool }}"
enable_horizon: "{{ enable_openstack_core | bool }}"
enable_kuryr: "yes"
enable_zun: "yes"

15. Deployment

A. Bootstrap servers with kolla deploy dependencies :

kolla-ansible bootstrap-servers -i ./multinode

B. Do pre-deployment checks for hosts :

kolla-ansible prechecks  -i ./multinode

C. Finally proceed to actual OpenStack deployment :

kolla-ansible deploy  -i ./multinode

D. Validate before deployment :

kolla-ansible validate-config -i ./multinode

16. Using OpenStack

A. Install the OpenStack CLI client :

pip install python-openstackclient -c https://releases.openstack.org/constraints/upper/master

source /etc/kolla/admin-openrc-system.sh 

• This file contains credentials of Openstack.

B. OpenStack requires a clouds.yaml file where credentials for the admin user are set. To this file will be generated in /etc/kolla/clouds.yaml by running this command :

kolla-ansible post-deploy

17. Creating the 2 AZs

A. Create a new aggregate, associating it with an AZ in the process :

openstack aggregate create --zone az1 my-aggregate

openstack aggregate create --zone az2 my-aggregate2

B. Add host to it using the openstack client :

openstack aggregate add host my-aggregate compute1

openstack aggregate add host my-aggregate2 compute2

C. List all host aggregates and show information about a specific aggregate :

openstack aggregate list 

openstack aggregate show my-aggregate

openstack aggregate show my-aggregate2

18. Run This File /share/kolla-ansible/init-runonce To Create Demo Services

./init-runonce

19. Access your Cloud

A. Get Dashboard URL :

cat /etc/kolla/clouds.yml

• Take the auth_url till the IP Address without the port : http://IP-Address:port
• You will find the admin user password as --> password: admin-user-password

B. Get admin user Password for your Cloud Dashboard :

You can also run this command ( Alternative Way ) :

grep keystone_admin_password /etc/kolla/passwords.yml 

20. Verify Services

A. Network Topology :

B. Instances :

21. References

Main Guides :

• For Deploying Openstack Cloud using kolla-ansible : https://docs.openstack.org/kolla-ansible/latest/user/quickstart.html , https://docs.openstack.org/kolla-ansible/latest/user/multinode.html
• For Creating AZs : https://docs.openstack.org/nova/latest/admin/availability-zones.html
• Clarification For OpenStack Regions and Availability Zones : https://www.guruadvisor.net/en/cloud/121-openstack-regions-and-availability-zones