6: Kubernetes Deployments
This chapter shows you how to use Deployments to add cloud-native features such as self-healing, scaling, rolling updates, and versioned rollbacks to stateless apps on Kubernetes.
The chapter is divided as follows:
- Deployment theory
- Create a Deployment
- Manually scale an app
- Perform a rollout
- Perform a rollback
Deployment theory
Deployments are the most popular way of running stateless apps on Kubernetes. They add self-healing, scaling, rollouts, and rollbacks.
Consider a quick example.
Assume you have a requirement for a web app that needs to be resilient, scale on demand, and be frequently updated. You write the app, containerize it, and define it in a Pod YAML so it can run on Kubernetes. You then wrap the Pod ...
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