cheungpat/kubernetes-cron repository overview

This is a basic implementation of the Kubernetes CronJob spec. It is intended to be used temporarily on clusters where alpha resources cannot be enabled, such as GKE until CronJobs exit alpha⁠.

⁠Usage

1. Create the third party CronJob resource on your cluster.

   kubectl apply -f https://raw.githubusercontent.com/tdickman/kubernetes-cron/0.1.2/cron-job-resource.yaml

2. Run the kubernetes-cron deployment on your cluster (in the default namespace).

   kubectl apply -f https://raw.githubusercontent.com/tdickman/kubernetes-cron/0.1.2/deployment.yaml

3. Create a CronJob object in your cluster based on the spec⁠, with one exception. Change apiVersion to epicconstructions.com/v1alpha1. An example can be found in example-cron-job.yaml.

⁠Details

This project consists of the following pieces:

• A 3rd party⁠ cronjob resource that allows the creation of cronjob items in your cluster.
• A kubernetes-cron pod watches for new cronjobs, and creates child jobs based on the cron interval specified.

⁠Known Limitations

• There is no automated cleanup process to delete old jobs, which may result in performance issues with cronjobs that run frequently.
• SSL certs are not properly verified when connecting to the API.
• This is intended to loosely follow the alpha CronJob spec. Please open an issue if any issues are found.