Summary
In this chapter, we've discussed topics not only on building a continuous delivery pipeline, but also on techniques to strengthen our every deployment task. The rolling update of pods is a powerful tool that performs updates in a controlled fashion. To trigger a rolling update, what we need to do is update the pod's specification. Although the update is managed by Kubernetes, we can still control it with kubectl rollout.
Later on, we fabricated an extensible continuous delivery pipeline by GitHub/DockerHub/Travis-CI. Next, we moved our steps to learn more about the life of pods to prevent any possible failure, including using the readiness and liveness probe to protect a pod, initializing a pod with Init containers, handling SIGTERM properly by writing Dockerfile in the exec form, leveraging life cycle hooks to stall a pod's readiness as well as its termination for the iptables rules to be removed at the right timing, and assigning pods to specific nodes with node selectors.
In the...
