docker - 具有多个容器的容器上具有多个裸露端口的单一服务

Question

我已经在同一个 pods 中使用了多个容器。

 kubectl apply  -f myymlpod.yml

kubectl expose pod mypod --name=myname-pod --port 8855 --type=NodePort

然后我就可以测试“暴露”

minikube service list

..

|-------------|-------------------------|-----------------------------|
|  NAMESPACE  |          NAME           |             URL             |
|-------------|-------------------------|-----------------------------|
| default     | kubernetes              | No node port                |
| default     | myname-pod              | http://192.168.99.100:30036 |
| kube-system | kube-dns                | No node port                |
| kube-system | kubernetes-dashboard    | No node port                |
|-------------|-------------------------|-----------------------------|

现在，myymlpod.yml中有多个容器。
一个容器的服务在8855上运行，一个在8877。

下面的文章〜提示〜我需要做什么。

https://www.mirantis.com/blog/multi-container-pods-and-container-communication-in-kubernetes/

Exposing multiple containers in a Pod

While this example shows how to use a single container to access other containers in the pod, it’s quite common for several containers in a Pod to listen on different ports — all of which need to be exposed. To make this happen, you can either create a single service with multiple exposed ports, or you can create a single service for every poirt you’re trying to expose.

“创建具有多个公开端口的单一服务”

我找不到任何有关如何实际执行此操作的信息，它公开了多个端口。

如何在一项服务上公开多个端口？

谢谢。

附加:

K8Containers.yml(如下)

apiVersion: v1
kind: Pod
metadata:
  name: mypodkindmetadataname
  labels:
    example: mylabelname

spec:

  containers:

  - name: containername-springbootfrontend
    image: mydocker.com/webfrontendspringboot:latest 
    resources:
      limits:
        memory: "800Mi"
        cpu: "800m" 
      requests:
        memory: "612Mi"
        cpu: "400m"
    ports:
      - containerPort: 8877


  - name: containername-businessservicesspringboot
    image: mydocker.com/businessservicesspringboot:latest
    resources:
      limits:
        memory: "800Mi"
        cpu: "800m" 
      requests:
        memory: "613Mi"
        cpu: "400m" 
    ports:
      - containerPort: 8855

kubectl apply  -f K8containers.yml
pod "mypodkindmetadataname" created

kubectl get pods
NAME                    READY     STATUS    RESTARTS   AGE
mypodkindmetadataname   2/2       Running   0          11s

k8services.yml(如下)

apiVersion: v1
kind: Service
metadata: 
  name: myymlservice
  labels: 
    name: myservicemetadatalabel
spec: 
  type: NodePort
  ports:
  - name: myrestservice-servicekind-port-name
    port: 8857
    targetPort: 8855
  - name: myfrontend-servicekind-port-name
    port: 8879
    targetPort: 8877
  selector: 
    name: mypodkindmetadataname

........

kubectl apply  -f K8services.yml
service "myymlservice" created

........

 minikube service myymlservice --url
http://192.168.99.100:30784
http://192.168.99.100:31751

........

 kubectl describe service myymlservice


Name:                     myymlservice
Namespace:                default
Labels:                   name=myservicemetadatalabel
Annotations:              kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"name":"myservicemetadatalabel"},"name":"myymlservice","namespace":"default"...
Selector:                 name=mypodkindmetadataname
Type:                     NodePort
IP:                       10.107.75.205
Port:                     myrestservice-servicekind-port-name  8857/TCP
TargetPort:               8855/TCP
NodePort:                 myrestservice-servicekind-port-name  30784/TCP
Endpoints:                <none>
Port:                     myfrontend-servicekind-port-name  8879/TCP
TargetPort:               8877/TCP
NodePort:                 myfrontend-servicekind-port-name  31751/TCP
Endpoints:                <none>
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

....

不幸的是，当我尝试调用“公开的”项目时，它仍然无法正常工作。

呼唤

http://192.168.99.100:30784/myrestmethod

不起作用

并打电话

http://192.168.99.100:31751

要么

http://192.168.99.100:31751/index.html

不起作用

有人看到我想念的东西。

APPEND(正在运行)

选择器在“名称”上不匹配，在标签上匹配。

k8containers.yml(部分在顶部)

apiVersion: v1
kind: Pod
metadata:
  name: mypodkindmetadataname
  labels:
    myexamplelabelone: mylabelonevalue
    myexamplelabeltwo: mylabeltwovalue

spec:

  containers:

  # Main application container
  - name: containername-springbootfrontend
    image: mydocker.com/webfrontendspringboot:latest 
    resources:
      limits:
        memory: "800Mi"
        cpu: "800m" 
      requests:
        memory: "612Mi"
        cpu: "400m"
    ports:
      - containerPort: 8877


  - name: containername-businessservicesspringboot
    image: mydocker.com/businessservicesspringboot:latest
    resources:
      limits:
        memory: "800Mi"
        cpu: "800m" 
      requests:
        memory: "613Mi"
        cpu: "400m" 
    ports:
      - containerPort: 8855

k8services.yml

apiVersion: v1
kind: Service
metadata: 
  name: myymlservice
  labels: 
    name: myservicemetadatalabel
spec: 
  type: NodePort
  ports:
  - name: myrestservice-servicekind-port-name
    port: 8857
    targetPort: 8855
  - name: myfrontend-servicekind-port-name
    port: 8879
    targetPort: 8877
  selector: 
    myexamplelabelone: mylabelonevalue
    myexamplelabeltwo: mylabeltwovalue

Answer 1

是的，您可以创建一个具有多个端口打开的单一服务，也可以创建指向容器端口的服务端口连接。

kind: Service
apiVersion: v1
metadata:
  name: mymlservice
spec:
  selector:
    app: mymlapp
  ports:
  - name: servicename-1
    port: 4444
    targetPort: 8855
  - name: servicename-2
    port: 80
    targetPort: 8877

目标端口要装到容器端口的位置。