[kodekloud] 01 Core Concepts : Namespaces 풀이

Q1. How many namespace exist?

controlplane ~ ➜  k get namespaces

 

Q2. How many pods exist in the research namespace?

k get pods --namespace=research

 

Q3. Create a POD in the finance namespace. Use the spec given below.

• Name: redis

• Image Name: redis

k run redis --image=redis -n finance

 

Q4. Which namespace has the blue pod in it?

k get pods --all-namespaces | grep blue

Q5. Access the Blue web application using the link above your terminal!!

#특정 namespace pods상세 보기
k describe pods -n audacity

Q6. What DNS name should the Blue application use to access the database db-service in its own namespace - marketing?

 k get pods -n marketing
 k get svc -n marketing

Q7. What DNS name should the Blue application use to access the database db-service in the dev namespace?

dev 네임스페이스에도 db-service가 존재한다.

>> Since the blue application and the db-service are in different namespaces.

In this case, we need to use the service name along with the namespace to access the database.

The FQDN (fully Qualified Domain Name) for the db-service in this example would be

db-service.dev.svc.cluster.local.
Note: You can also access it using the service name and namespace like this: db-service.dev