Red Hat SummitChapter 19. Configuring for GCE
19.1. Overview
OpenShift Container Platform can be configured to access a Google Compute Engine (GCE) infrastructure, including using GCE volumes as persistent storage for application data. After GCE is configured properly, some additional configurations will need to be completed on the OpenShift Container Platform hosts.
19.2. Configuring Masters
You can set the GCE configuration on your OpenShift Container Platform master hosts in two ways:
19.2.1. Configuring OpenShift Container Platform Masters for GCE with Ansible
During advanced installations, GCE can be configured using the openshift_cloudprovider_kind parameter, which is configurable in the inventory file.
Example GCE Configuration with Ansible
# Cloud Provider Configuration # openshift_cloudprovider_kind=gce
When Ansible configures GCE, the following files are created for you:
- /etc/origin/cloudprovider/gce.conf
- /etc/origin/master/master-config.yaml
- /etc/origin/node/node-config.yaml
The advanced installation configures multizone support by default. If you want single-zone support, edit the /etc/origin/cloudprovider/gce.conf as shown in Configuring Multizone Support in a GCE Deployment.
19.2.2. Manually Configuring OpenShift Container Platform Masters for GCE
To configure the OpenShift Container Platform masters for GCE:
Edit or create the master configuration file (/etc/origin/master/master-config.yaml by default) on all masters and update the contents of the
apiServerArgumentsandcontrollerArgumentssections:kubernetesMasterConfig: ... apiServerArguments: cloud-provider: - "gce" cloud-config: - "/etc/origin/cloudprovider/gce.conf" controllerArguments: cloud-provider: - "gce" cloud-config: - "/etc/origin/cloudprovider/gce.conf"ImportantWhen triggering a containerized installation, only the directories of /etc/origin and /var/lib/origin are mounted to the master and node container. Therefore, master-config.yaml should be in /etc/origin/master instead of /etc/.
Start or restart the OpenShift Container Platform services:
# systemctl restart atomic-openshift-master
19.3. Configuring Nodes
To configure the OpenShift Container Platform nodes for GCE:
Edit or create the node configuration file (/etc/origin/node/node-config.yaml by default) on all nodes and update the contents of the
kubeletArgumentssection:kubeletArguments: cloud-provider: - "gce" cloud-config: - "/etc/origin/cloudprovider/gce.conf"ImportantWhen triggering a containerized installation, only the directories of /etc/origin and /var/lib/origin are mounted to the master and node container. Therefore, node-config.yaml should be in /etc/origin/node instead of /etc/.
Start or restart the OpenShift Container Platform services all nodes.
# systemctl restart atomic-openshift-node
19.4. Configuring Multizone Support in a GCE Deployment
If manually congifuring GCE, multizone support is not configured by default.
The advanced installation configures multizone support by default.
If you want multizone support:
- Edit or create a /etc/origin/cloudprovider/gce.conf file on all of your OpenShift Container Platform hosts, both masters and nodes.
Add the following contents:
[Global] multizone = true
Start or restart the OpenShift Container Platform services on the master and all nodes.
# systemctl restart atomic-openshift-master # systemctl restart atomic-openshift-node
To return to single-zone support, set the multizone value to false.
