Configure the deployment¶
Ansible references some files that contain mandatory and optional configuration directives. Before you can run the Ansible playbooks, modify these files to define the target environment. Configuration tasks include:
Target host networking to define bridge interfaces and networks.
A list of target hosts on which to install the software.
Virtual and physical network relationships for OpenStack Networking (neutron).
Passwords for all services.
Initial environment configuration¶
OpenStack-Ansible (OSA) depends on various files that are used to build an inventory for Ansible. Perform the following configuration on the deployment host.
Copy the contents of the
/opt/openstack-ansible/etc/openstack_deploydirectory to the
Change to the
openstack_user_config.ymlfile and make changes to the deployment of your OpenStack environment.
user_variables.ymlfile to configure global and role specific deployment options. The file contains some example variables and comments but you can get the full list of variables in each role’s specific documentation.
One important variable is the
install_methodwhich configures the installation method for the OpenStack services. The services can either be deployed from source (default) or from distribution packages. Source based deployments are closer to a vanilla OpenStack installation and allow for more tweaking and customizations. On the other hand, distro based deployments generally provide a package combination which has been verified by the distributions themselves. However, this means that updates are being released less often and with a potential delay. Moreover, this method might offer fewer opportunities for deployment customizations. The
install_methodvariable is set during the initial deployment and you must not change it as OpenStack-Ansible is not able to convert itself from one installation method to the other. As such, it’s important to judge your needs against the pros and cons of each method before making a decision. Please note that the
distroinstallation method was introduced during the Rocky cycle, and as a result of which, Ubuntu 16.04 is not supported due to the fact that there are no Rocky packages for it.
The configuration in the
openstack_user_config.yml file defines which hosts
run the containers and services deployed by OpenStack-Ansible. For
example, hosts listed in the
shared-infra_hosts section run containers for
many of the shared services that your OpenStack environment requires. Some of
these services include databases, Memcached, and RabbitMQ. Several other
host types contain other types of containers, and all of these are listed
Some services, such as glance, heat, horizon and nova-infra, are not listed individually in the example file as they are contained in the os-infra hosts. You can specify image-hosts or dashboard-hosts if you want to scale out in a specific manner.
For examples, please see our User Guides
For details about how the inventory is generated, from the environment configuration and the variable precedence, see our Reference Guide under the inventory section.
Installing additional services¶
To install additional services, the files in
etc/openstack_deploy/conf.d provide examples showing
the correct host groups to use. To add another service, add the host group,
allocate hosts to it, and then execute the playbooks.
Advanced service configuration¶
OpenStack-Ansible has many options that you can use for the advanced configuration of services. Each role’s documentation provides information about the available options.
This step is essential to tailoring OpenStack-Ansible to your needs and is generally overlooked by new deployers. Have a look at each role documentation, user guides, and reference if you want a tailor made cloud.
Infrastructure service roles¶
OpenStack service roles¶
Configuring service credentials¶
Configure credentials for each service in the
/etc/openstack_deploy/user_secrets.yml file. Consider using the
Ansible Vault feature to
increase security by encrypting any files that contain credentials.
Adjust permissions on these files to restrict access by non-privileged users.
keystone_auth_admin_password option configures the
password for both the OpenStack API and Dashboard access.
We recommend that you use the
pw-token-gen.py script to generate random
values for the variables in each file that contains service credentials:
# cd /opt/openstack-ansible # ./scripts/pw-token-gen.py --file /etc/openstack_deploy/user_secrets.yml
To regenerate existing passwords, add the
The playbooks do not currently manage changing passwords in an existing environment. Changing passwords and rerunning the playbooks will fail and might break your OpenStack environment.