根据实践学习K8S--7.使用Deployment进行不停机升级和回滚以及手动扩缩容

在现网情况下,业务升级常常需要停机,下面我们使用Deployment来进行不停机升级和回滚.

1.先使用创建多个nginx的pod

[root@node-1 pod]# cat nginx_deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
[root@node-1 pod]# 
[root@node-1 pod]# kubectl create -f nginx_deployment.yaml 
[root@node-1 pod]# kubectl get pod
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-54f57cf6bf-lh2rv   1/1     Running   0          74s
nginx-deployment-54f57cf6bf-psbqx   1/1     Running   0          74s
nginx-deployment-54f57cf6bf-tgtms   1/1     Running   0          74s

2.现在我们对镜像从nginx:1.7.9升级到nginx:1.9.1

方法1:直接使用命令行修改镜像:
[root@node-1 pod]# kubectl set image deployment/nginx-deployment nginx=nginx:1.9.1
deployment.apps/nginx-deployment image updated
方法2:使用kubectl edit deployment命令修改deployment的配置信息
[root@node-1 pod]# kubectl edit deployments.apps nginx-deployment 

根据实践学习K8S--7.使用Deployment进行不停机升级和回滚以及手动扩缩容_第1张图片

使用kubectl rollout status查看进度,正在

[root@node-1 pod]# kubectl rollout status deployment nginx-deployment 
Waiting for deployment "nginx-deployment" rollout to finish: 2 out of 3 new replicas have been updated...
Waiting for deployment "nginx-deployment" rollout to finish: 2 out of 3 new replicas have been updated...
Waiting for deployment "nginx-deployment" rollout to finish: 2 out of 3 new replicas have been updated...
Waiting for deployment "nginx-deployment" rollout to finish: 1 old replicas are pending termination...
Waiting for deployment "nginx-deployment" rollout to finish: 1 old replicas are pending termination...
deployment "nginx-deployment" successfully rolled out

实际上deployment操作是的rs,nginx-deployment-54f57cf6bf 是旧的rs,nginx-deployment-56f8998dbc是新的deployment

[root@node-1 pod]# kubectl get rs
NAME                          DESIRED   CURRENT   READY   AGE
centos-56d49f9c64             0         0         0       7d4h
centos-6b68465d79             1         1         1       7d4h
nginx-deployment-54f57cf6bf   0         0         0       11m
nginx-deployment-56f8998dbc   3         3         3       6m58s

3.系统如何升级的说明
更新的过程中,系统会创建临时的deployment对象,先把旧的deployment的replicas减1,新的deployment加1,直到旧的deployment的副本为0,升级完成.
使用kubectl edit deployments命令,你可以看到spec下的strategy一些关于升级的默认策略.

spec:
  strategy:
    rollingUpdate:
      maxSurge: 25% #新旧副本pod的总数不超过配置数的比率,如果100个pod,那么运行中的和升级中的pod总和不超过125.
      maxUnavailable: 25% #升级过程中不可用状态pod的上限,意思就是升级过程中确保处于running状态的pod是75%以上,再继续更新.
    type: RollingUpdate#以滚动更新的方式逐个更新pod,如果是Recreate,系统会杀死所有的pod,重建pod.

4.回滚
现网中,如果发现新版本存在问题,需要回退,需要一系列的操作还原,还需要进行详细的测试,防止回退时配置错误.
deployment记录了升级前的配置,通过deployment,我们更容易将版本进行回退.

首先查看更新记录

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 
deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
1         <none>
2         <none>

我们发现没有记录更新信息,原因是因为我们在创建deployment的时候没有配置记录命令.创建的时候加上–record参数

[root@node-1 pod]# kubectl create -f nginx_deployment.yaml --record
deployment.apps/nginx-deployment created
[root@node-1 pod]#
#为了模拟版本的问题,我们升级的镜像选择一个不存在的版本
[root@node-1 pod]# kubectl set image deployment/nginx-deployment nginx=nginx:2020
#查看状态,发现由于找不到镜像,会一直卡在这里
[root@node-1 pod]# kubectl rollout status deployment nginx-deployment 
Waiting for deployment "nginx-deployment" rollout to finish: 1 out of 3 new replicas have been updated...

#查看RS状态,发现新的RS一直在创建第一个pod,
[root@node-1 pod]# kubectl get rs
NAME                          DESIRED   CURRENT   READY   AGE
nginx-deployment-54f57cf6bf   3         3         3       2m47s
nginx-deployment-569cb44c46   1         1         0       80s
#查看pod,发现有一个pod拉取镜像失败.
[root@node-1 pod]# kubectl get pod
NAME                                READY   STATUS             RESTARTS   AGE
centos-6b68465d79-5w9df             1/1     Running            0          7d5h
nginx-deployment-54f57cf6bf-2dfh8   1/1     Running            0          3m57s
nginx-deployment-54f57cf6bf-57plj   1/1     Running            0          3m57s
nginx-deployment-54f57cf6bf-vjpwq   1/1     Running            0          3m57s
nginx-deployment-569cb44c46-g2bq7   0/1     ImagePullBackOff   0          2m30s
#发现错误,我们执行回滚,先查看更新记录
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 

deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
1         kubectl create --filename=nginx_deployment.yaml --record=true
2         kubectl create --filename=nginx_deployment.yaml --record=true

#添加--revision=n的方式选择查看具体更新版本的信息
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment --revision=1
deployment.apps/nginx-deployment with revision #1
Pod Template:
  Labels:       app=nginx
        pod-template-hash=54f57cf6bf
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:1.7.9
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment --revision=2
deployment.apps/nginx-deployment with revision #2
Pod Template:
  Labels:       app=nginx
        pod-template-hash=569cb44c46
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:2020
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]#
#我们发现版本1是我们需要还原的版本,执行回滚,--to-revision=1为指定回滚版本,默认是上一个版本.
[root@node-1 pod]# kubectl rollout undo deployment nginx-deployment --to-revision=1
deployment.apps/nginx-deployment rolled back
[root@node-1 pod]# 
#查看pod已还原为原来的状态了
[root@node-1 pod]# kubectl get pod
NAME                                READY   STATUS    RESTARTS   AGE
centos-6b68465d79-5w9df             1/1     Running   0          7d5h
nginx-deployment-54f57cf6bf-2dfh8   1/1     Running   0          8m44s
nginx-deployment-54f57cf6bf-57plj   1/1     Running   0          8m44s
nginx-deployment-54f57cf6bf-vjpwq   1/1     Running   0          8m44s

如果镜像拉取正常,已经完成更新了,pod也运行正常,只是业务异常,可以回退吗?

[root@node-1 pod]# kubectl set image deployment/nginx-deployment nginx=nginx:1.9.1
deployment.apps/nginx-deployment image updated
#已更新到1.9.1版本
[root@node-1 pod]# kubectl describe deployments.apps nginx-deployment 
Name:                   nginx-deployment
Namespace:              default
CreationTimestamp:      Tue, 04 Feb 2020 19:27:09 +0800
Labels:                 <none>
Annotations:            deployment.kubernetes.io/revision: 4
                        kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
Selector:               app=nginx
Replicas:               3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=nginx
  Containers:
   nginx:
    Image:        nginx:1.9.1
    Port:         80/TCP
    Host Port:    0/TCP
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   nginx-deployment-56f8998dbc (3/3 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  34m   deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 3
  Normal  ScalingReplicaSet  33m   deployment-controller  Scaled up replica set nginx-deployment-569cb44c46 to 1
  Normal  ScalingReplicaSet  26m   deployment-controller  Scaled down replica set nginx-deployment-569cb44c46 to 0
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 1
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 2
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 2
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 1
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 3
  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 0
 #查看更新版本
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 
deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
2         kubectl create --filename=nginx_deployment.yaml --record=true
3         kubectl create --filename=nginx_deployment.yaml --record=true
4         kubectl create --filename=nginx_deployment.yaml --record=true

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment  --revision=3
deployment.apps/nginx-deployment with revision #3
Pod Template:
  Labels:       app=nginx
        pod-template-hash=54f57cf6bf
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:1.7.9
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment  --revision=4
deployment.apps/nginx-deployment with revision #4
Pod Template:
  Labels:       app=nginx
        pod-template-hash=56f8998dbc
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:1.9.1
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]# 
#我们回退到版本3

[root@node-1 pod]# kubectl rollout undo deployment nginx-deployment --to-revision=3
deployment.apps/nginx-deployment rolled back
[root@node-1 pod]# kubectl get pod
NAME                                READY   STATUS        RESTARTS   AGE
centos-6b68465d79-5w9df             1/1     Running       0          7d5h
nginx-deployment-54f57cf6bf-7972m   1/1     Running       0          3s
nginx-deployment-54f57cf6bf-pdvp7   1/1     Running       0          7s
nginx-deployment-54f57cf6bf-v2rxd   1/1     Running       0          5s
nginx-deployment-56f8998dbc-cdnll   0/1     Terminating   0          27m
nginx-deployment-56f8998dbc-ljct7   0/1     Terminating   0          27m
nginx-deployment-56f8998dbc-pdtbj   0/1     Terminating   0          27m
[root@node-1 pod]# 
#已回退到版本1.7.9
[root@node-1 pod]# kubectl describe deployments.apps nginx-deployment 
Name:                   nginx-deployment
Namespace:              default
CreationTimestamp:      Tue, 04 Feb 2020 19:27:09 +0800
Labels:                 <none>
Annotations:            deployment.kubernetes.io/revision: 5
                        kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
Selector:               app=nginx
Replicas:               3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=nginx
  Containers:
   nginx:
    Image:        nginx:1.7.9
    Port:         80/TCP
    Host Port:    0/TCP
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    NewReplicaSetAvailable
OldReplicaSets:  <none>
NewReplicaSet:   nginx-deployment-54f57cf6bf (3/3 replicas created)
Events:
  Type    Reason             Age                From                   Message
  ----    ------             ----               ----                   -------
  Normal  ScalingReplicaSet  36m                deployment-controller  Scaled up replica set nginx-deployment-569cb44c46 to 1
  Normal  ScalingReplicaSet  29m                deployment-controller  Scaled down replica set nginx-deployment-569cb44c46 to 0
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 1
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 2
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 2
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 1
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 3
  Normal  ScalingReplicaSet  27m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 0
  Normal  ScalingReplicaSet  35s                deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 1
  Normal  ScalingReplicaSet  33s                deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 2
  Normal  ScalingReplicaSet  33s                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 2
  Normal  ScalingReplicaSet  31s (x2 over 37m)  deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 3
  Normal  ScalingReplicaSet  31s                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 1
  Normal  ScalingReplicaSet  29s                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 0

5.更新多种配置
在使用命令更新deployment配置的时候,更新就马上执行了,在需要更新多种配置的时候,是不方便的.
我们可以通过暂停deployment更新,配置好所有的更新配置之后,再执行统一更新.

#暂停更新
[root@node-1 pod]# kubectl rollout pause deployment nginx-deployment 
deployment.apps/nginx-deployment paused
[root@node-1 pod]# 
[root@node-1 pod]# kubectl set image deployment/nginx-deployment nginx=nginx:1.9.2
deployment.apps/nginx-deployment image updated
#没有立即进行更新
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 
deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
2         kubectl create --filename=nginx_deployment.yaml --record=true
4         kubectl create --filename=nginx_deployment.yaml --record=true
5         kubectl create --filename=nginx_deployment.yaml --record=true

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment --revision=5
deployment.apps/nginx-deployment with revision #5
Pod Template:
  Labels:       app=nginx
        pod-template-hash=54f57cf6bf
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:1.7.9
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]# 
#我们可以添加其他更新配置
[root@node-1 pod]# kubectl set resources deployment nginx-deployment -c=nginx --limits=cpu=200m,memory=512Mi
deployment.apps/nginx-deployment resource requirements updated
#未更新
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 
deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
2         kubectl create --filename=nginx_deployment.yaml --record=true
4         kubectl create --filename=nginx_deployment.yaml --record=true
5         kubectl create --filename=nginx_deployment.yaml --record=true

[root@node-1 pod]# 
#恢复更新
[root@node-1 pod]# kubectl rollout resume deployment nginx-deployment 
deployment.apps/nginx-deployment resumed
[root@node-1 pod]# kubectl rollout history deployment nginx-deployment 
deployment.apps/nginx-deployment 
REVISION  CHANGE-CAUSE
2         kubectl create --filename=nginx_deployment.yaml --record=true
4         kubectl create --filename=nginx_deployment.yaml --record=true
5         kubectl create --filename=nginx_deployment.yaml --record=true
6         kubectl create --filename=nginx_deployment.yaml --record=true

[root@node-1 pod]# kubectl rollout history deployment nginx-deployment --revision=6
deployment.apps/nginx-deployment with revision #6
Pod Template:
  Labels:       app=nginx
        pod-template-hash=9f5dd848b
  Annotations:  kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
  Containers:
   nginx:
    Image:      nginx:1.9.2
    Port:       80/TCP
    Host Port:  0/TCP
    Limits:
      cpu:      200m
      memory:   512Mi
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

[root@node-1 pod]# 
#更新完成
[root@node-1 pod]# kubectl describe deployments.apps nginx-deployment 
Name:                   nginx-deployment
Namespace:              default
CreationTimestamp:      Tue, 04 Feb 2020 19:27:09 +0800
Labels:                 <none>
Annotations:            deployment.kubernetes.io/revision: 6
                        kubernetes.io/change-cause: kubectl create --filename=nginx_deployment.yaml --record=true
Selector:               app=nginx
Replicas:               3 desired | 1 updated | 4 total | 3 available | 1 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=nginx
  Containers:
   nginx:
    Image:      nginx:1.9.2
    Port:       80/TCP
    Host Port:  0/TCP
    Limits:
      cpu:        200m
      memory:     512Mi
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
  Progressing    True    ReplicaSetUpdated
OldReplicaSets:  nginx-deployment-54f57cf6bf (3/3 replicas created)
NewReplicaSet:   nginx-deployment-9f5dd848b (1/1 replicas created)
Events:
  Type    Reason             Age                From                   Message
  ----    ------             ----               ----                   -------
  Normal  ScalingReplicaSet  55m                deployment-controller  Scaled down replica set nginx-deployment-569cb44c46 to 0
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 1
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 2
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 2
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled up replica set nginx-deployment-56f8998dbc to 3
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 1
  Normal  ScalingReplicaSet  53m                deployment-controller  Scaled down replica set nginx-deployment-54f57cf6bf to 0
  Normal  ScalingReplicaSet  26m                deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 1
  Normal  ScalingReplicaSet  26m                deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 2
  Normal  ScalingReplicaSet  26m                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 2
  Normal  ScalingReplicaSet  26m (x2 over 63m)  deployment-controller  Scaled up replica set nginx-deployment-54f57cf6bf to 3
  Normal  ScalingReplicaSet  26m                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 1
  Normal  ScalingReplicaSet  26m                deployment-controller  Scaled down replica set nginx-deployment-56f8998dbc to 0
  Normal  ScalingReplicaSet  40s                deployment-controller  Scaled up replica set nginx-deployment-9f5dd848b to 1

6.deployment扩缩容
如果当前pod不足于处理业务,需要扩容;或者业务量缩减,需要进行缩容.
1)手动扩缩容

#我们将pod的副本数从3扩容到5

[root@node-1 pod]# 
[root@node-1 pod]# kubectl get pod
NAME                               READY   STATUS    RESTARTS   AGE
centos-6b68465d79-5w9df            1/1     Running   0          7d6h
nginx-deployment-9f5dd848b-4bbgv   1/1     Running   0          101s
nginx-deployment-9f5dd848b-6qkvf   1/1     Running   0          3m21s
nginx-deployment-9f5dd848b-rnm7s   1/1     Running   0          4m16s
[root@node-1 pod]# 
[root@node-1 pod]# kubectl scale deployment nginx-deployment --replicas=5
deployment.apps/nginx-deployment scaled
[root@node-1 pod]# kubectl get pod
NAME                               READY   STATUS    RESTARTS   AGE
centos-6b68465d79-5w9df            1/1     Running   0          7d6h
nginx-deployment-9f5dd848b-4bbgv   1/1     Running   0          2m1s
nginx-deployment-9f5dd848b-6qkvf   1/1     Running   0          3m41s
nginx-deployment-9f5dd848b-7r46p   1/1     Running   0          3s
nginx-deployment-9f5dd848b-cffn5   1/1     Running   0          3s
nginx-deployment-9f5dd848b-rnm7s   1/1     Running   0          4m36s

#我们将pod的副本数从5缩容到2

[root@node-1 pod]# kubectl scale deployment nginx-deployment --replicas=2
deployment.apps/nginx-deployment scaled
[root@node-1 pod]# kubectl get pod
NAME                               READY   STATUS        RESTARTS   AGE
centos-6b68465d79-5w9df            1/1     Running       0          7d6h
nginx-deployment-9f5dd848b-4bbgv   0/1     Terminating   0          3m28s
nginx-deployment-9f5dd848b-6qkvf   1/1     Running       0          5m8s
nginx-deployment-9f5dd848b-7r46p   0/1     Terminating   0          90s
nginx-deployment-9f5dd848b-cffn5   0/1     Terminating   0          90s
nginx-deployment-9f5dd848b-rnm7s   1/1     Running       0          6m3s
[root@node-1 pod]# kubectl get pod
NAME                               READY   STATUS    RESTARTS   AGE
centos-6b68465d79-5w9df            1/1     Running   0          7d6h
nginx-deployment-9f5dd848b-6qkvf   1/1     Running   0          5m14s
nginx-deployment-9f5dd848b-rnm7s   1/1     Running   0          6m9s

自动扩缩容较复杂,放在下一个博客写.

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