ralonsoh / openstack-operator

Meta Operator for OpenStack

openstack-operator

This is the primary operator for OpenStack. It is a "meta" operator, meaning it serves to coordinate the other operators for OpenStack by watching and configuring their CustomResources (CRs). Additionally installing this operator will automatically install all required operator dependencies for installing/managing OpenStack.

Description

This project is built, modeled, and maintained with [operator-sdk] (https://github.com/operator-framework/operator-sdk).

Getting Started

You’ll need a Kubernetes cluster to run against. You can use KIND to get a local cluster for testing, or run against a remote cluster. Note: Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster kubectl cluster-info shows).

Running on the cluster

1. Install Instances of Custom Resources:

kubectl apply -f config/samples/

2. Build and push your image to the location specified by IMG:

make docker-build docker-push IMG=<some-registry>/openstack-operator:tag

3. Deploy the controller to the cluster with the image specified by IMG:

make deploy IMG=<some-registry>/openstack-operator:tag

Uninstall CRDs

To delete the CRDs from the cluster:

make uninstall

Undeploy controller

UnDeploy the controller to the cluster:

make undeploy

Building your own bundle, index images

The OpenStack operator uses multiple bundles to minimize the number of deployment artifacts we have in the OLM catalog while also providing enough space for our CRs (this is a big project). As such the build order for local bundles is a bit different than normal.

1. Run make:bundle. This pins down dependencies to version used in the go.mod and and also string replaces the URL for any dependant bundles (storage, etc) that we will build below. Additionally a dependency.yaml is added to the generated bundle so that we require any dependencies. This sets the stage for everything below.

make bundle

2. Run dep-bundle-build-push. This creates any dependency bundles required by this project. It builds and pushes them to a registry as this is required to be able to build the main bundle.

make dep-bundle-build-push

3. Run bundle-build. This will execute podman to build the custom-bundle.Dockerfile.

make bundle-build

4. Run bundle-push. This pushes the resulting bundle image to the registry.

make bundle-push

5. Run catalog-build. At this point you can generate your index image so that it contains both of the above bundle images. Because we use dependencies in the openstack-operator's main bundle it will automatically install the CSV contained in the dependant (storage, etc) bundle.

make catalog-build

6. Run catalog-push. Push the catalog to your registry.

make catalog-push

Uninstall CRDs

To delete the CRDs from the cluster:

make uninstall

Undeploy controller

UnDeploy the controller to the cluster:

make undeploy

Contributing

// TODO(user): Add detailed information on how you would like others to contribute to this project

How it works

This project aims to follow the Kubernetes Operator pattern

It uses Controllers which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster

Test It Out

1. Install the CRDs into the cluster:

make install

2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):

make run

NOTE: You can also run this in one step by running: make install run

Modifying the API definitions

If you are editing the API definitions, generate the manifests such as CRs or CRDs using:

make manifests

NOTE: Run make --help for more information on all potential make targets

More information can be found via the Kubebuilder Documentation

License

Copyright 2022.

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.