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Atanas Todorov
Nov 22, 2023
a78d1ac · Nov 22, 2023

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Overview

Cronjob CR and controller that schedules native batchv1/cronjobs. The API supports two versions of tha API to experiment with K8s conversion webhooks.

The tutorial page: https://book.kubebuilder.io/cronjob-tutorial/cronjob-tutorial Source code of the tutorial: https://github.com/kubernetes-sigs/kubebuilder/tree/master/docs/book/src/multiversion-tutorial/testdata/project

Prerequisites

  • go version v1.20.0+
  • docker version 17.03+.
  • kubectl version v1.11.3+.
  • Access to a Kubernetes v1.11.3+ cluster.

To Deploy on the cluster

Run ./Instructions/create_kind_and_registry.sh which will create a kind cluster and setup docker registry More info: https://kind.sigs.k8s.io/docs/user/local-registry/

To deploy controller in local kind cluster

Deploy changes to K8s cluster
Install cert-manager in the kind cluster kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.13.2/cert-manager.yaml
Build the docker image make docker-build docker-push IMG=localhost:5001/kb:5.0
Deploy the controller,CRD webhooks make deploy IMG=localhost:5001/kb:5.0
UnDeploy the controller from the cluster make undeploy

Testing

Apply v2 of the API kubectl apply -f config/samples/kb_v2_cronjob.yaml or alternatively v2 of the API kubectl apply -f config/samples/kb_v1_cronjob.yaml

k get pod --all-namespaces -> find controller pod -> k logs -n k get jobs -> verify jobs are scheduled

To Run locally against local kind cluster

  1. kind create cluster -n nasko - create a clsuter
  2. make install - installs the CRDs in the cluster under .kube/config
  3. make run - run the controller

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