将外部IP分配给Kubernetes服务 [英] Assign External IP to a Kubernetes Service

问题描述

编辑:我的设置的重点是(如果可能的话)实现以下目标:

The whole point of my setup is to achieve (if possible) the following :

• 我有多个k8s节点
• 当我(通过公司网络)联系IP地址时，应该将其路由到我的容器/pod/服务/其他任何一个地址.
• 我应该能够轻松地设置该IP(就像在我的服务.yml定义中一样)

我正在运行一个小的Kubernetes集群(使用kubeadm构建)，以评估是否可以将Docker(旧)Swarm设置移至k8s.我绝对需要的功能是能够为容器分配IP，就像我使用MacVlan一样.

I'm running a small Kubernetes cluster (built with kubeadm) in order to evaluate if I can move my Docker (old)Swarm setup to k8s. The feature I absolutely need is the ability to assign IP to containers, like I do with MacVlan.

在当前的docker设置中，我正在使用MacVlan将公司网络中的IP地址分配给某些容器，以便可以直接访问(而不使用反向代理)，就像它是任何物理服务器一样.我正在尝试通过k8s实现类似的功能.

In my current docker setup, I'm using MacVlan to assign IP addresses from my company's network to some containers so I can reach directly (without reverse-proxy) like if it's any physical server. I'm trying to achieve something similar with k8s.

我发现:

• 我必须使用 Service
• 我不能使用 LoadBalancer 类型，因为它仅适用于兼容的云提供商(例如GCE或AWS).
• 我应该使用 ExternalIPs
• 入口资源是某种反向代理吗?

• I have to use Service
• I can't use the LoadBalancer type, as it's only for compatible cloud providers (like GCE or AWS).
• I should use ExternalIPs
• Ingress Resources are some kind of reverse proxy ?

我的Yaml文件是:

apiVersion: apps/v1beta1
kind: Deployment
metadata:
      name: nginx-deployment
spec:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
      nodeSelector:
        kubernetes.io/hostname: k8s-slave-3
---
kind: Service
apiVersion: v1
metadata:
  name: nginx-service
spec:
  type: ClusterIP
  selector:
    app: nginx
  ports:
    - name: http
      protocol: TCP
      port: 80
      targetPort: 80
  externalIPs: 
    - A.B.C.D

我希望我的服务获得IP A.B.C.D(这是我公司的网络之一).我的部署正在正常进行，因为我可以使用它的 ClusterIP 从k8s集群中访问我的nginx容器.

I was hopping that my service would get the IP A.B.C.D (which is one of my company's network). My deployment is working as I can reach my nginx container from inside the k8s cluster using it's ClusterIP.

我想念什么?或者至少，在哪里可以找到有关网络流量的信息以查看数据包是否到来?

What am I missing ? Or at least, where can I find informations on my network traffic in order to see if packets are coming ?

编辑:

$ kubectl get svc
NAME            CLUSTER-IP     EXTERNAL-IP       PORT(S)   AGE
kubernetes      10.96.0.1      <none>            443/TCP   6d
nginx-service   10.102.64.83   A.B.C.D           80/TCP    23h

谢谢.

推荐答案

如果这仅用于测试，请尝试

If this is just for testing, then try

kubectl port-forward service/nginx-service 80:80

那么你可以

curl http://localhost:80

这篇关于将外部IP分配给Kubernetes服务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！