snapshot-controller

README

crd

This project contains a code for creating snapshot CRD and k8s controller for it. Based on kubebuilder generated files.

Description

A snapshot CRD is a k8s representation of the image snapshot. It contains a list of files and their hashes encoded into a single base64 string.

A snapshot CRD controller is a tool for managing CRD snapshots. When new CRD is found the controller will read the data from it and upload this data with appropriate MinIO object.

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 Custom Resources Definition into the cluster:

   make install
   

2. Install Instances of Custom Resources:

   kubectl apply -f config/samples/
   

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

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

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

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

Uninstall CRDs

To delete the CRDs from the cluster:

make uninstall

Undeploy controller

UnDeploy the controller from the cluster:

make undeploy

Modifying the API definitions

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

make manifests

How it works

This project aims to follow the Kubernetes Operator pattern.

It uses Controllers, which provide a reconcile function responsible for synchronizing resources until the desired state is reached on the cluster.

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

More information can be found via the Kubebuilder Documentation

License

Copyright 2023.

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.