Kolla-Ansible

What is kolla-ansible ?


It’s a script who permit to create openstack “stack” in docker containers. It uses ansible to setup things.


Setup


Requirements


  • 2 network interfaces (one configured and the other one not configured)

  • 16G memory

  • 120G HDD


Install dependencies


sudo apt update && sudo apt install python3-dev git libffi-dev gcc libssl-dev && sudo apt install python3-pip && sudo pip3 install -U pip && sudo pip install 'ansible>=6,<8'

Install Kolla-Ansible


sudo pip3 install git+https://opendev.org/openstack/kolla-ansible@master && sudo mkdir -p /etc/kolla && sudo chown $USER:$USER /etc/kolla && cp -r /usr/local/share/kolla-ansible/etc_examples/kolla/* /etc/kolla && cp /usr/local/share/kolla-ansible/ansible/inventory/* .


Install Ansible dependencies


kolla-ansible install-deps


Configure Ansible (deprecated)


sudo mkdir /etc/ansible && sudo vim /etc/ansible/ansible.cfg


Insert in ansible.cfg:


[defaults]
host_key_checking=False

pipelining=True

forks=100


Prepare installation


  • For multinode

    If you use multinode, modify the configuration in the multinode file:

    [control]
10.0.0.[10:12] ansible_user=ubuntu ansible_password=foobar ansible_become=true
# Ansible supports syntax like [10:12] - that means 10, 11 and 12.
# Become clause means "use sudo".

[network:children]
control
# when you specify group_name:children, it will use contents of group specified.

[compute]
10.0.0.[13:14] ansible_user=ubuntu ansible_password=foobar ansible_become=true

[monitoring]
10.0.0.10
# This group is for monitoring node.
# Fill it with one of the controllers' IP address or some others.

[storage:children]
compute

[deployment]
localhost       ansible_connection=local become=true
# use localhost and sudo

    Check if your configuration is right by:

    ansible -i multinode all -m ping


Generate the password


kolla-genpwd


globals.yml (/etc/kolla/globals.yml)


Edit these lines:


kolla_base_distro: "ubuntu"
network_interface: "eth0"
neutron_external_interface: "ens19"
kolla_internal_vip_address: "10.1.1.250"


You can enable services manually by typing yes on enable_* lines.


Deployment


  • Multinode

    kolla-ansible -i ./multinode bootstrap-servers && kolla-ansible -i ./multinode prechecks && kolla-ansible -i ./multinode deploy

  • All-in-one

    kolla-ansible -i ./all-in-one bootstrap-servers && kolla-ansible -i ./all-in-one prechecks && kolla-ansible -i ./all-in-one deploy


Setup openstack cli


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


kolla-ansible post-deploy && sudo cp /etc/kolla/clouds.yaml /etc/openstack/ && sudo cp /etc/kolla/clouds.yaml ~/.config/openstack


Setup network


Run this:


openstack router create router && openstack network create local-net && openstack subnet create --subnet-range 10.0.0.0/24 --network local-net --gateway 10.0.0.1 --dns-nameserver 8.8.8.8 local-subnet && openstack router add subnet router local-subnet && openstack network create --external --provider-physical-network physnet1 --provider-network-type flat public1 && openstack subnet create --allocation-pool start=10.1.2.150,end=10.1.2.199 --network public1 --subnet-range 10.1.2.0/24 --gateway 10.1.2.1 public1-subnet && openstack router set --external-gateway public1 router


Enable packet forwarding


Edit /etc/sysctl.conf


net.ipv4.ip_forward=1
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.all.rp_filter=0


Run:


iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

DON’T FORGET TO ENABLE ENS19 INET

sudo ip link set dev ens19 up

Network config file

network:
  ethernets:
    ens18:
      dhcp4: true
    ens19:
      dhcp4: false
      dhcp6: false
  version: 2

Use openstack


Import Cirros image (for testing purpose)


wget https://download.cirros-cloud.net/0.6.0/cirros-0.6.0-x86_64-disk.img
openstack image create --container-format bare \
--disk-format qcow2 --file cirros-0.6.0-x86_64-disk.img cirros


Import Ubuntu 22.04 image


wget https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img
openstack image create --container-format bare \
--disk-format qcow2 --file jammy-server-cloudimg-amd64.img ubuntu-22.04

Create “default” flavors

openstack flavor create --vcpus 1 --ram 512 --disk 1 m1.tiny && \
    openstack flavor create --vcpus 1 --ram 2048 --disk 20 m1.small && \
    openstack flavor create --vcpus 2 --ram 4096 --disk 40 m1.medium && \
    openstack flavor create --vcpus 4 --ram 8192 --disk 80 m1.large && \
    openstack flavor create --vcpus 8 --ram 16384 --disk 160 m1.xlarge

Create security group allowing ssh

openstack security group create test && \
openstack security group rule create --protocol tcp --remote-ip 0.0.0.0/0 --ingress --dst-port 22 test

Advanced configuration

https://docs.openstack.org/kolla-ansible/latest/admin/advanced-configuration.html