我正在学习 K8s 并在 OSX 上安装了 minikube。我正在阅读 Nigel Poulton 的 K8s 书籍并在第 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
并且此服务使用节点端口:
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
该应用是一个简单的 nodejs 应用:
/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;
应用程序正在运行。当我访问 pod 时，我可以 curl 它:
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 curl 它就不起作用:
➜ k8s minikube ip
127.0.0.1
➜ k8s curl localhost:30001
curl: (7) Failed to connect to localhost port 30001: Connection refused
我错过了什么？
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
最佳答案
minikube 在您的 Mac 上的虚拟机中运行，因此 minikube IP 不是 127.0.0.1。它实际上是您的 Mac 看到的 VM 的 IP 地址。现在我不确定你为什么得到 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>
您的 Mac 上可能有一个 VPN 软件，它会把事情搞砸。
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，根据您运行的 Hypervisor(Hyperkit、VBox 等)，您可能需要检查网桥是否配置为与 VM 子网通信，以及该网桥的 IP 范围是否与虚拟机。例如，对于我的 Mac 主机中的 Hyperkit:
# 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
关于macos - K8s : How do I access my app with a service?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62585798/