Monolith to Microservices

Question 1

What are the limitations of a Monolithic app?

Answer 1

Agility
- rebuilding the whole app takes a lot of time
Scalability
- scaling a monolith app happens in both directions:
horizontal and vertical => resources
DevOps cycles
- high frequency of deployments fails due to high build time

Question 2

What are the benefits of using microservices when it comes to the limitations of monolithic apps?

Answer 2

Agility
- separated services => changes to one do not affect the others
Scalability
- separated services => scale each component in part as needed
DevOps cycle
- separated services => less dev cycles with low build time

Question 3

what are feature flags used for?

Answer 3

• separate delivering software from release

=> deploy any time and release when ready

Question 4

what are the benefits of using feature flags?

Answer 4

1. better incident recovery (toggle flag off)
2. testing directly in prod on a subgroup of users
   => realistic testing environment

Question 5

how to view all namespaces?

Answer 5

kubectl get namespaces

Question 6

how to create a namespace?

Answer 6

kubectl create ns namespaceName

Question 7

how to get a serice from a namespace

Answer 7

kubectl get svc serviceName -n namespaceName