本篇内容介绍了“k8s部署ingress-nginx的方法是什么”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
一、部署配置Ingress
1、获取配置文件
#文件已下载到本地
https://github.com/kubernetes/ingress-nginx/tree/nginx-0.20.0/deploy
2、准备镜像
unzip ingress-nginx-nginx-0.20.0.zip
cd ingress-nginx-nginx-0.20.0/deploy/
vim mandatory.yaml #其他文件的集合
#编辑mandatory.yaml文件,将defaultbackend镜像地址改成阿里云的镜像地址(如下图)
image: registry.cn-hangzhou.aliyuncs.com/allinpay/defaultbackend-amd64:v1.5
3、安装
kubectl apply -f mandatory.yaml
#稍等片刻,使用下列命令查询
kubectl get namespace
kubectl get pods -n ingress-nginx
4、创建后端pod和service (pod-B、service-B)
vim deploy-demo.yaml
apiVersion: v1
kind: Service
metadata:
name: myapp
namespace: default
spec:
selector:
app: myapp
release: canary
ports:
- name: http
targetPort: 80
port: 80
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v2
ports:
- name: http
containerPort: 80
#应用配置
kubectl apply -f deploy-demo.yaml
#查看
kubectl get pods
5、创建service-A
vim service-nodeport.yaml
apiVersion: v1
kind: Service
metadata:
name: ingress-nginx
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
spec:
type: NodePort
ports:
- name: http
port: 80
targetPort: 80
protocol: TCP
nodePort: 30080
- name: https
port: 443
targetPort: 443
protocol: TCP
nodePort: 30443
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
#应用配置
kubectl apply -f service-nodeport.yaml
#查看
kubectl get svc -n ingress-nginx
在外部浏览器中中访问:ip:30080
此时报错的原因是因为没有生成ingress-controller关联到service-B的ingress规则;
6、定义ingress规则
定义ingress规则,此间规则会自动注入到ingress-controller(pod)的nginx.conf中;
ingress-controller是直接关联到service-B的,但是中间由ingress来生成各种规则;
vim ingress-myapp.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-myapp
namespace: default
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: myapp.magedu.com
http:
paths:
- path:
backend:
serviceName: myapp
servicePort: 80
此时ingress-controller的nginx.conf中会自动生成一个server段的配置,也就是一个nginx的虚拟主机的字段,还包括upstream配置等;
upstream自动代理到后端pod(pod-B),这些都是自动生成,所以就实现了自动生成配置,自动更改配置等;
只需要改此yaml文件即可;
#应用配置
kubectl apply -f ingress-myapp.yaml
在外部主机上配置好host文件
然后在浏览器中再访问,发现已经可以访问到后端pod了
二、使用https
1、创建k8s证书(要注意和后端的pod使用相同的namespace)
kubectl -n default create secret tls ingress-test --key /home/centos/cert/cash532.key --cert /home/centos/cert/cash532.crt
2、创建ingress规则
注意namespace的相同性,要不然证书无法生效
vim ingress-myapp-cash532.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-myapp
namespace: default
annotations:
kubernetes.io/ingress.class: "nginx"
kubernetes.io/secure-backends: "true"
kubernetes.io/ssl-passthrough: "true"
spec:
tls:
- hosts:
- myapp.cash532.xyz
secretName: ingress-test
rules:
- host: myapp.cash532.xyz
http:
paths:
- path:
backend:
serviceName: myapp
servicePort: 80
#应用配置
kubectl apply -f ingress-myapp-cash532.yaml
浏览器访问
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