cpo

README

OpenStack Cloud Controller Manager

Thank you for visiting the openstack-cloud-controller-manager repository!

OpenStack Cloud Controller Manager - An external cloud controller manager for running kubernetes in an OpenStack cluster.

Introduction

External cloud providers were introduced as an Alpha feature in Kubernetes release 1.6. This repository contains an implementation of external cloud provider for OpenStack clusters. An external cloud provider is a kubernetes controller that runs cloud provider-specific loops required for the functioning of kubernetes. These loops were originally a part of the kube-controller-manager, but they were tightly coupling the kube-controller-manager to cloud-provider specific code. In order to free the kubernetes project of this dependency, the cloud-controller-manager was introduced.

cloud-controller-manager allows cloud vendors and kubernetes core to evolve independent of each other. In prior releases, the core Kubernetes code was dependent upon cloud provider-specific code for functionality. In future releases, code specific to cloud vendors should be maintained by the cloud vendor themselves, and linked to cloud-controller-manager while running Kubernetes.

As such, you must disable these controller loops in the kube-controller-manager if you are running the openstack-cloud-controller-manager. You can disable the controller loops by setting the --cloud-provider flag to external when starting the kube-controller-manager.

For more details, please see:

• https://github.com/kubernetes/enhancements/blob/master/keps/sig-cloud-provider/20180530-cloud-controller-manager.md
• https://kubernetes.io/docs/tasks/administer-cluster/running-cloud-controller/#running-cloud-controller-manager
• https://kubernetes.io/docs/tasks/administer-cluster/developing-cloud-controller-manager/

Examples

Here are some examples of how you could leverage openstack-cloud-controller-manager:

• loadbalancers

Developing

make will build, test, and package this project. This project uses go dep for dependency management.

If you don't have a Go Environment setup, we also offer the ability to run make in a Docker Container. The only requirement for this is that you have Docker installed and configured (of course). You don't need to have a Golang environment setup, and you don't need to follow rules in terms of directory structure for the code checkout.

To use this method, just call the hack/make.sh script with the desired argument: hack/make.sh build for example will run make build in a container.

NOTE You MUST run the script from the root source directory as shown above, attempting to do something like cd hack && make.sh build will not work because we won't bind mount the source files into the container.

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.