Question

我正在学习K8，并在OSX上安装了minikube。我正在阅读奈杰尔·普尔顿（Nigel Poulton）的K8s书，并在第5章（部署）中进行实验。

我有这个部署：

k8s cat deploy.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-deploy
spec:
  replicas: 10
  selector:
    matchLabels:
      app: hello-world
  minReadySeconds: 10
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
      maxSurge: 1
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-pod
        image: nigelpoulton/k8sbook:latest
        ports:
        - containerPort: 8080

此服务使用nodeport：

k8s cat svc.yaml 
 apiVersion: v1
 kind: Service
 metadata:
    name: hello-svc
    labels:
      app: hello-world
 spec:
    type: NodePort
    ports:
    - port: 8080
      nodePort: 30001
      protocol: TCP
    selector:
      app: hello-world

该应用程序是一个简单的nodejs应用程序：

/src # cat app.js 
// Sample node.js web app for Pluralsight Docker CI course
// For demonstration purposes only
'use strict';
var express = require('express'),
app = express();
app.set('views', 'views');
app.set('view engine', 'pug');
app.get('/', function(req, res) {
res.render('home', {
});
});
app.listen(8080);
module.exports.getApp = app;

该应用程序正在运行。当我进入吊舱时，我可以将其卷曲：

kubectl exec -it hello-deploy-8d494c7f6-27528 sh

/src # apk add curl
 
/src # curl localhost:8080
<html><head><title>K8s rocks!</title><link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css"/></head><body><div class="container"><div class="jumbotron"><h1>Kubernetes Rocks!</h1><p>Check out my K8s Deep Dive course!</p><p> <a class="btn btn-primary" href="https://acloud.guru/learn/kubernetes-deep-dive">The video course</a></p><p></p></div></div></body></html>/src #

但是，如果我从macOS卷曲，它将无法正常工作：

 ➜ k8s minikube ip
127.0.0.1

➜ k8s curl localhost:30001
curl: (7) Failed to connect to localhost port 30001: Connection refused

我想念什么？

编辑：包括更多输出：

kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-svc    NodePort    10.98.184.143   <none>        8080:30001/TCP   6h15m
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP          22h


➜  k8s minikube service list
|-------------|------------|--------------|-----|
|  NAMESPACE  |    NAME    | TARGET PORT  | URL |
|-------------|------------|--------------|-----|
| default     | hello-svc  |         8080 |     |
| default     | kubernetes | No node port |
| kube-system | kube-dns   | No node port |
|-------------|------------|--------------|-----|
➜  k8s

Answer 1

minikube在Mac上的VM中运行，因此minikube IP不是127.0.0.1。实际上，这是Mac所看到的VM的IP地址。现在，我不确定您为什么会收到127.0.0.1，因为这对我来说很好：

$ minikube start
?  minikube v1.11.0 on Darwin 10.15.5
✨  Using the hyperkit driver based on existing profile
?  Starting control plane node minikube in cluster minikube
?  Restarting existing hyperkit VM for "minikube" ...
?  Preparing Kubernetes v1.18.3 on Docker 19.03.8 ...
?  Verifying Kubernetes components...
?  Enabled addons: dashboard, default-storageclass, storage-provisioner
?  Done! kubectl is now configured to use "minikube"
$ minikube ip
192.168.64.11
$ curl 192.168.64.11:30001
<html><head><title>K8s rocks!</title><link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css"/></head><body><div class="container"><div class="jumbotron"><h1>Kubernetes Rocks!</h1><p>Check out my K8s Deep Dive course!</p><p> <a class="btn btn-primary" href="https://acloud.guru/learn/kubernetes-deep-dive">The video course</a></p><p></p></div></div></body></html>

您可能在Mac上安装了一个VPN软件，该软件弄乱了事情。

如果可能有助于检查您的VM的IP地址：

$ minikube ssh
                         _             _
            _         _ ( )           ( )
  ___ ___  (_)  ___  (_)| |/')  _   _ | |_      __
/' _ ` _ `\| |/' _ `\| || , <  ( ) ( )| '_`\  /'__`\
| ( ) ( ) || || ( ) || || |\`\ | (_) || |_) )(  ___/
(_) (_) (_)(_)(_) (_)(_)(_) (_)`\___/'(_,__/'`\____)

$ ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 4E:33:DE:14:29:35
          inet addr:192.168.64.11  Bcast:192.168.64.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:21781 errors:0 dropped:0 overruns:0 frame:14
          TX packets:10123 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:28636337 (27.3 MiB)  TX bytes:1671406 (1.5 MiB)

此外，根据所运行的管理程序（Hyperkit，VBox等），您可能需要检查网桥是否配置为与VM子网对话，并且该网桥的IP范围与服务器中的IP地址相匹配。虚拟机。例如，在我的Mac主机上，对于Hyperkit（我的情况）：

# On my mac
$ ifconfig bridge100
bridge100: flags=8a63<UP,BROADCAST,SMART,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
    options=3<RXCSUM,TXCSUM>
    ether 3a:f9:d3:93:95:64
    inet 192.168.64.1 netmask 0xffffff00 broadcast 192.168.64.255
    inet6 fe80::8ad:ce3b:83d9:6c10%bridge100 prefixlen 64 secured scopeid 0x17
    inet6 fd38:a1cf:6e5c:2722:462:b0d:a2c1:69bc prefixlen 64 autoconf secured
    inet6 fd38:a1cf:6e5c:2722:983c:b72b:39e7:8b70 prefixlen 64 autoconf temporary
    Configuration:
        id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
        maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
        root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
        ipfilter disabled flags 0x0
    member: en9 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 22 priority 0 path cost 0
    Address cache:
        4e:33:de:14:29:35 Vlan1 en9 1031 flags=0<>
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active

K8s：如何通过服务访问我的应用程序？

1 个答案: