I passed the CKAD exam a few months ago, And I would like to leave some comments about the experience.
Why I studied Kubernetes and applied CKAD?
I have been working for 10+ years as a Backend/Data/Blockchain software engineer at LINE Corp.
LINE Corp is my 3rd company after I graduate from university and all of the companies are using on-premise infrastructure, not like Cloud(AWS/GCP) service.
So I had to think about the below points when I want to implement a software system.
- Resilience/Durability
- High availability
- Service discovery
- Scale-out
Simply say about above, The software system has to alive 24/7(99.9%) somewhere and easily make their copy for horizontally scale-out.
To do that, it should be a containerized application also.
And considering the human-resource/system maintenance/microservice-architecture, It should be easy to apply multi-container design patterns(Sidecar, Ambassador, Adapter)
I was able to study Kubernetes to solve the above problems, and through the CKAD test, I was able to clearly see what I knew and did not know.
