What is a Kubernetes Operator?
In short and straightforward terms, a Kubernetes Operator is a webhook that continuously listens for particular resource events. Developers can write logic, known as the Reconcile logic, to determine the next steps that should occur when these events happen.
For example, let's consider a Wordpress application. To deploy this on Kubernetes, we need to create MySQL instances and a Wordpress site instance, and then expose the Wordpress service URL. This process involves manual intervention, but we can automate these tasks whenever our application deployment is applied.
Prerequisites
Before we start, make sure you have the following installed:
- Docker
- Minikube
- Operator SDK
- Golang (1.21.0)
Now, watch in operator running terminal as the Operator triggers reconciliation for the Wordpress deployment.
Sample Output :
Cheers ! We've successfully set up the foundation for our Wordpress Operator using Golang. In this post, we've covered the initialization of the Operator, creation of the controller and types, updating the Wordpress spec, and configuring the reconciliation logic.
In the next post, Part 2, we will delve deeper into the reconciliation logic. Specifically, we'll focus on creating a MySQL instance and deploying the Wordpress site. Stay tuned for more exciting updates and practical insights!
Source Code : https://github.com/vyas-git/kubernetes-custom-operator
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