Chapter 18. Configuring for OpenStack
18.1. Overview
When deployed on OpenStack, OpenShift Container Platform can be configured to access OpenStack infrastructure, including using OpenStack Cinder volumes as persistent storage for application data.
18.2. Configuring OpenStack Variables
To set the required OpenStack variables, create a /etc/cloud.conf file with the following contents on all of your OpenShift Container Platform hosts, both masters and nodes:
[Global] auth-url = <OS_AUTH_URL> username = <OS_USERNAME> password = <password> domain-id = <OS_USER_DOMAIN_ID> tenant-id = <OS_TENANT_ID> region = <OS_REGION_NAME> [LoadBalancer] subnet-id = <UUID of the load balancer subnet>
Consult your OpenStack administrators for values of the OS_ variables, which are commonly used in OpenStack configuration.
18.3. Configuring OpenShift Container Platform Masters for OpenStack
You can set an OpenStack configuration on your OpenShift Container Platform master and node hosts in two different ways:
- Using Ansible and the advanced installation tool
- Manually, by modifying the master-config.yaml and node-config.yaml files.
18.3.1. Configuring OpenShift Container Platform for OpenStack with Ansible
During advanced installations, OpenStack can be configured using the following parameters, which are configurable in the inventory file:
-
openshift_cloudprovider_kind -
openshift_cloudprovider_openstack_auth_url -
openshift_cloudprovider_openstack_username -
openshift_cloudprovider_openstack_password -
openshift_cloudprovider_openstack_domain_id -
openshift_cloudprovider_openstack_domain_name -
openshift_cloudprovider_openstack_tenant_id -
openshift_cloudprovider_openstack_tenant_name -
openshift_cloudprovider_openstack_region -
openshift_cloudprovider_openstack_lb_subnet_id
Example 18.1. Example OpenStack Configuration with Ansible
# Cloud Provider Configuration
#
# Note: You may make use of environment variables rather than store
# sensitive configuration within the ansible inventory.
# For example:
#openshift_cloudprovider_openstack_username="{{ lookup('env','USERNAME') }}"
#openshift_cloudprovider_openstack_password="{{ lookup('env','PASSWORD') }}"
#
# Openstack
#openshift_cloudprovider_kind=openstack
#openshift_cloudprovider_openstack_auth_url=http://openstack.example.com:35357/v2.0/
#openshift_cloudprovider_openstack_username=username
#openshift_cloudprovider_openstack_password=password
#openshift_cloudprovider_openstack_domain_id=domain_id
#openshift_cloudprovider_openstack_domain_name=domain_name
#openshift_cloudprovider_openstack_tenant_id=tenant_id
#openshift_cloudprovider_openstack_tenant_name=tenant_name
#openshift_cloudprovider_openstack_region=region
#openshift_cloudprovider_openstack_lb_subnet_id=subnet_id18.3.2. Manually Configuring OpenShift Container Platform Masters for OpenStack
Edit or create the master configuration file on all masters (/etc/origin/master/master-config.yaml by default) and update the contents of the apiServerArguments and controllerArguments sections:
kubernetesMasterConfig:
...
apiServerArguments:
cloud-provider:
- "openstack"
cloud-config:
- "/etc/cloud.conf"
controllerArguments:
cloud-provider:
- "openstack"
cloud-config:
- "/etc/cloud.conf"When triggering a containerized installation, only the directories of /etc/origin and /var/lib/origin are mounted to the master and node container. Therefore, cloud.conf should be in /etc/origin/ instead of /etc/.
18.3.3. Manually Configuring OpenShift Container Platform Nodes for OpenStack
Edit or create the node configuration file on all nodes (/etc/origin/node/node-config.yaml by default) and update the contents of the kubeletArguments and nodeName sections:
nodeName:
<instance_name> 1
kubeletArguments:
cloud-provider:
- "openstack"
cloud-config:
- "/etc/cloud.conf"- 1
- Name of the OpenStack instance where the node runs (i.e., name of the virtual machine)
When triggering a containerized installation, only the directories of /etc/origin and /var/lib/origin are mounted to the master and node container. Therefore, cloud.conf should be in /etc/origin/ instead of /etc/.
