k8s - namespace

namespace

- 분리하여 관리할 수 있다

- 같은 Namespace 안에 동일한 이름의 pod를 만들 수 없다

- 이로 보아 영역을 구분하여 사용할 수 있도록 한다

1-1) Namespace

apiVersion: v1
kind: Namespace
metadata:
  name: nm-1

1-2) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-1
  namespace: nm-1
  labels:
    app: pod
spec:
  containers:
  - name: container
    image: kubetm/app
    ports:
    - containerPort: 8080

1-3) Service

apiVersion: v1
kind: Service
metadata:
  name: svc-1
  namespace: nm-1
spec:
  selector:
    app: pod
  ports:
  - port: 9000
    targetPort: 8080

2. ResourceQuota

-사용하는 양을 제한을 한다

2-1) Namespace

apiVersion: v1
kind: Namespace
metadata:
  name: nm-3

2-2) ResourceQuota

apiVersion: v1
kind: ResourceQuota
metadata:
  name: rq-1
  namespace: nm-3
spec:
  hard:
    requests.memory: 1Gi
    limits.memory: 1Gi

ResourceQuota Check Command

kubectl describe resourcequotas --namespace=nm-3

2-3) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-2
spec:
  containers:
  - name: container
    image: kubetm/app

2-4) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-3
spec:
  containers:
  - name: container
    image: kubetm/app
    resources:
      requests:
        memory: 0.5Gi
      limits:
        memory: 0.5Gi

3. LimitRange

3-1) Namespace

apiVersion: v1
kind: Namespace
metadata:
  name: nm-5

 

3-2) LimitRange

apiVersion: v1
kind: LimitRange
metadata:
  name: lr-1
spec:
  limits:
  - type: Container
    min:
      memory: 0.1Gi
    max:
      memory: 0.4Gi
    maxLimitRequestRatio:
      memory: 3
    defaultRequest:
      memory: 0.1Gi
    default:
      memory: 0.2Gi

LimitRange Check Command

kubectl describe limitranges --namespace=nm-5

3-3) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-1
spec:
  containers:
  - name: container
    image: kubetm/app
    resources:
      requests:
        memory: 0.1Gi
      limits:
        memory: 0.5Gi