Namespace

Default

• Includes
  • Resource Limits

    • spec:
        hard:
          pods: "5"
          requests.cpu: "4"
          requests.memory: 4Gi
          limits.cpu: "5"
          limits.memory: 4Gi
      

  • Policy
  • Allow resource to connect with each other with DNS.
• Namespace:
  • Default
  • kube-system
  • kube-public
• Namespace Isolation
  • Dev
  • Prod
• DNS:
  • “db-service.prod.svc.cluster.local”:
    • Service Name: db-service
    • Namespace: prod
    • Service: svc
    • Domain: cluster.local
• --namespace=<namespace>:
  • default: Default
• Assign a Namespace when you create a new resource:

  •  apiVersion: v1
     kind: Pod
     metadata:
       name: app-pod
       namespace: prod
     ....
    

• Create a new namespace
  • By YAML:

    apiVersion: v1 
    kind: Namespace
    metadata:
      name: prod
    

  • By command line: kubectl create namespace prod
• Set namespace:
  • kubectl config set-context $(kubectl config current-context) --namespace=prod
• Get resources in all namespaces:
  • kubectl get all --all-namespaces