Openstack Ansible Kolla On CentOS 7 with Python VirtualEnv

Useful Links

Operating Kolla – https://docs.openstack.org/kolla-ansible/latest/user/operating-kolla.html

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

Docker Image Repo: Probably deploy one of these because the images are fairly large.

NOTE:  firewalld & NetworkManager should be removed.  Docker plays nice with selinux and everything works reliably.   You CAN use firewalld but you will have to open up ports on the outside manually and is outside the scope of kolla.

Deployment Tools Installation:

Deploying OpenStack via Ansible is the new preferred method. This process is loose and changes every release, so heres what I have so far to deploy Rocky release successfully.

#Install deps
yum install epel-release -y yum install ansible python-pip python-virtualenv p
ython-devel libffi-devel gcc openssl-devel libselinux-python -y

#Install docker
curl -sSL https://get.docker.io | bash
mkdir -p /etc/systemd/system/docker.service.d
tee /etc/systemd/system/docker.service.d/kolla.conf <<-'EOF'
[Service]
MountFlags=shared
EOF
systemctl daemon-reload
systemctl restart docker
systemctl enable docker virtualenv --system-site-packages /opt/openstack/ source /opt/openstack/bin/activate
pip install -U pip
#Install kolla-ansible for our release
pip install --upgrade kolla-ansible==7.0.0
pip install decorators python-openstackclient cp -r /opt/openstack/share/kolla-ansible/etc_examples/kolla /etc/
cp -r /opt/openstack/share/kolla-ansible/ansible/inventory/* ~ echo "ansible_python_interpreter: /opt/openstack/bin/python" >> /etc/kolla/globals.yml kolla-genpwd

Custom configurations:

As of now kolla only supports config overrides for ini based configs. An operator can change the location where custom config files are read from by editing /etc/kolla/globals.ymland adding the following line.

# The directory to merge custom config files the kolla's config files
node_custom_config: "/etc/kolla/config"

Kolla allows the operator to override configuration of services. Kolla will look for a file in /etc/kolla/config/<< service name >>/<< config file >>. This can be done per-project, per-service or per-service-on-specified-host. For example to override scheduler_max_attempts in nova scheduler, the operator needs to create /etc/kolla/config/nova/nova-scheduler.conf with content:

Ironic Kolla Configs:

Ironic needs an initramfs and kernel to boot the install image.  Need to build some images with openstack Image Builder.  Below is just the centos installer images.. these are not what you need. 🙂

mkdir /etc/kolla/config/ironic/ -p
wget http://mirror.beyondhosting.net/centos/7.5.1804/os/x86_64/isolinux/initrd.img -O /etc/kolla/config/ironic/ironic-agent.initramfs
wget http://mirror.beyondhosting.net/centos/7.5.1804/os/x86_64/isolinux/vmlinuz -O /etc/kolla/config/ironic/ironic-agent.kernel

Openstack Client Configuration:

Grab your keystone admin password from /etc/kolla/passwords.yml

kolla-ansible -i vbstack post-deploy
cat /etc/kolla/passwords.yml | grep keystone_admin_password
export OS_USERNAME=admin
export OS_PASSWORD=ttSbL92SubKgOao4Yp39ExERlSrJxhY1jUz3WaCy
export OS_TENANT_NAME=admin
export OS_AUTH_URL=http://192.168.5.201:35357/v3
export OS_PROJECT_DOMAIN_ID=default
export OS_USER_DOMAIN_ID=default
The following lines can be omitted
export OS_TENANT_ID=eddff72576f44d9e9638a50eb95957e0
export OS_REGION_NAME=RegionOne
export OS_CACERT=/path/to/cacertFile

Run ansible to configure your servers.  This assumes you already created your ansible host env layout.

Running your deployment

The next steps are to run an actual deployment and create all the containers ect.

Some critical pieces in /etc/kolla/globals.yml:

openstack_release: "rocky"

Reconfigure

Redeploy changes for specific services. When you need to make 1 change to a service that will not require the restart of other services, you can specify it directly to reduce the runtime of ansible.

kolla-ansible  -i inventory-config -t nova reconfigure

Tips and Tricks

Kolla ships with several utilities intended to facilitate ease of operation.

/usr/share/kolla-ansible/tools/cleanup-containers is used to remove deployed containers from the system. This can be useful when you want to do a new clean deployment. It will preserve the registry and the locally built images in the registry, but will remove all running Kolla containers from the local Docker daemon. It also removes the named volumes.

/usr/share/kolla-ansible/tools/cleanup-host is used to remove remnants of network changes triggered on the Docker host when the neutron-agents containers are launched. This can be useful when you want to do a new clean deployment, particularly one changing the network topology.

/usr/share/kolla-ansible/tools/cleanup-images --all is used to remove all Docker images built by Kolla from the local Docker cache.

kolla-ansible -i INVENTORY deploy is used to deploy and start all Kolla containers.

kolla-ansible -i INVENTORY destroy is used to clean up containers and volumes in the cluster.

kolla-ansible -i INVENTORY mariadb_recovery is used to recover a completely stopped mariadb cluster.

kolla-ansible -i INVENTORY prechecks is used to check if all requirements are meet before deploy for each of the OpenStack services.

kolla-ansible -i INVENTORY post-deploy is used to do post deploy on deploy node to get the admin openrc file.

kolla-ansible -i INVENTORY pull is used to pull all images for containers.

kolla-ansible -i INVENTORY reconfigure is used to reconfigure OpenStack service.

kolla-ansible -i INVENTORY upgrade is used to upgrades existing OpenStack Environment.

kolla-ansible -i INVENTORY check is used to do post-deployment smoke t

Docker Management:

  1. List all containers (only IDs) docker ps -aq.
  2. Stop all running containersdocker stop $(docker ps -aq)
  3. Remove all containersdocker rm $(docker ps -aq)
  4. Remove all images. docker rmi $(docker images -q)

SSL

ca_01.pem – this refers to your CA certificate pem file. AKA intermediate certificate?

Request Cert

openssl req -newkey rsa:2048 -nodes -keyout client.key -out client.csr

Sign Cert

openssl ca -in client.csr -days 1000 -out client-.pem -batch

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