未使用kuberenetes正确部署应用程序

我在开发一个spring boot应用程序时,使用docker compose创建了我的容器。对于库伯内特斯,我通过Minikubes使用了kompose。我把我的图片推到Docker Hub,我试着用两种方法部署我的容器

康普顿

和

kompose convert-f docker-compose.yaml kubectl create-f(解聚文件)

但我得到了这样的回应

WARN Volume mount on the host "/home/App/src/main/docker/postgres-data" isn't supported - ignoring path on the host 
INFO We are going to create Kubernetes Deployments, Services and PersistentVolumeClaims for your Dockerized application. If you need different kind of resources, use the 'kompose convert' and 'kubectl create -f' commands instead. 

INFO Deploying application in "default" namespace 
INFO Successfully created Service: adminer        
INFO Successfully created Service: app            
INFO Successfully created Service: mypostgres     
INFO Successfully created Deployment: adminer     
INFO Successfully created Deployment: app         
INFO Successfully created Deployment: mypostgres  
INFO Successfully created PersistentVolumeClaim: mypostgres-claim0 of size 100Mi. If your cluster has dynamic storage provisioning, you don't have to do anything. Otherwise you have to create PersistentVolume to make PVC work 

当我奔跑 kubectl get pods

NAME                           READY     STATUS             RESTARTS   AGE
adminer-6cd96f8846-69qb8       1/1       Running            0          2m
app-5796c489ff-m46xk           0/1       ImagePullBackOff   0          2m
mypostgres-649865b4d8-nhglj    1/1       Running            0          2m

Kubectl描述吊舱APP-5796C489FF-M46XK

表明了这一点

Name:           app-5796c489ff-m46xk
Namespace:      default
Node:           minikube/192.168.99.100
Start Time:     Mon, 11 Jun 2018 11:02:32 +0200
Labels:         io.kompose.service=app
                pod-template-hash=1352704599
Annotations:    <none>
Status:         Pending
IP:             172.17.0.3
Controlled By:  ReplicaSet/app-5796c489ff
Containers:
  app:
    Container ID:   
    Image:          iroolapp
    Image ID:       
    Port:           8086/TCP
    Host Port:      0/TCP
    State:          Waiting
      Reason:       ImagePullBackOff
    Ready:          False
    Restart Count:  0
    Environment:
      DATABASE_HOST:      mypostgres
      DATABASE_NAME:      test
      DATABASE_PASSWORD:  root
      DATABASE_PORT:      5432
      DATABASE_USER:      root
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-wdb8n (ro)
Conditions:
  Type           Status
  Initialized    True 
  Ready          False 
  PodScheduled   True 
Volumes:
  default-token-wdb8n:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-wdb8n
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     <none>
Events:
  Type     Reason                 Age              From               Message
  ----     ------                 ----             ----               -------
  Normal   Scheduled              3m               default-scheduler  Successfully assigned app-5796c489ff-m46xk to minikube
  Normal   SuccessfulMountVolume  3m               kubelet, minikube  MountVolume.SetUp succeeded for volume "default-token-wdb8n"
  Normal   Pulling                1m (x4 over 3m)  kubelet, minikube  pulling image "iroolapp"
  Warning  Failed                 1m (x4 over 3m)  kubelet, minikube  Failed to pull image "iroolapp": rpc error: code = Unknown desc = Error response from daemon: pull access denied for iroolapp, repository does not exist or may require 'docker login'
  Warning  Failed                 1m (x4 over 3m)  kubelet, minikube  Error: ErrImagePull
  Normal   BackOff                1m (x6 over 3m)  kubelet, minikube  Back-off pulling image "iroolapp"
  Warning  Failed                 1m (x6 over 3m)  kubelet, minikube  Error: ImagePullBackOff

最后这是我的docker compose文件

version: '3'
services:
  app:
    image: iroolapp
    depends_on:
    - mypostgres
    ports:
     - "9000:8086"
    environment:
      - DATABASE_HOST=mypostgres
      - DATABASE_USER=root
      - DATABASE_PASSWORD=root
      - DATABASE_NAME=test
      - DATABASE_PORT=5432

    networks:
        default:

  mypostgres:
    image: postgres:9.6-alpine
    container_name: mypostgres

    ports:
     - "5433:5432"


    environment:
     - POSTGRES_PASSWORD=root
     - POSTGRES_USER=root
     - POSTGRES_DB=irooldb
    volumes:
    - ./postgres-data:/var/lib/postgresql/data

  adminer:
    image: adminer
    ports:
      - 8080:8080
    networks:
        default:

networks:
   default:
      external:
        name: mynetwork

我的问题是:imagepullbackoff指的是什么?使用kompose是个好方法吗?在使用kubernetes之前,是否有必要将图片推送到docker hub