在k8s中，service的作用体现在两个方面，对集群内部，它不断跟踪pod的变化，更新endpoint中对应pod的对象，提供了ip不断变化的pod的服务发现机制； 对集群外部，他类似负载均衡器，可以在集群内外部对pod进行访问
对外发布方式
在k8s中，Pod的IP地址和service的ClusterIP仅可以在集群网络内部使用，对于集群外的应用是不可见的。 为了使外部的应用能够访问集群内的服务，Kubernetes目前提供了以下几种方案：
NodePort：将服务暴露在节点网络上，NodePort背后就是kube-proxy，kube-proxy是沟通服务网络，Pod网络和节点网络的桥梁
测试环境使用还行，当有几十上百的服务在集群中运行时，NodePort的端口管理就是个灾难。 因为每个端口只能是一种服务，端口范围只能是 30000-32767
LoadBalancer： 通过设置LoadBalancer映射到云服务商提供的LoadBalancer地址。 这种用法仅用于在公有云服务提供商的云平台上设置 Service 的场景。 受限于云平台，且通常在云平台部署LoadBalancer还需要额外的费用
在service提交后，Kubernetes就会调用CloudProvider在公有云上为你创建一个负载均衡服务，并且把被代理的Pod的IP地址配置给负载均衡服务做后端
**externalIPs：**service允许为其分配外部IP，如果外部IP路由到集群中一个或多个Node上，Service会被暴露给这些externalIPs。通过外部IP进入到集群的流量，将会被路由到Service的Endpoint上
**Ingress:**只需一个或者少量的公网IP和LB，即可同时将多个HTTP服务暴露到外网，七层反向代理。 可以简单理解为service的service，它其实就是一组基于域名和URL路径，把用户的请求转发到一个或多个service的规则
ingress组成
**ingress:**ingress是一个API对象，通过yaml文件来配置，ingress对象的作用是定义请求如何转发到service的规则，可以理解为配置模板。 ingress通过http或https暴露集群内部service，给service提供外部URL、负载均衡、SSL/TLS以及基于域名的反向代理。 ingress要依靠 ingress-controller 来具体实现以上功能
ingress-controller ： 当做反向代理或者说是转发器。 ingress-controller是具体实现反向代理及负载均衡的程序，对ingress定义的规则进行解析，根据配置的规则来实现请求转发。
ingress-controller并不是k8s自带的组件，实际上ingress-controller只是一个统称，用户可以选择不同的ingress-controller实现，目前，由k8s维护的ingress-controller只有google云的GCE与ingress-nginx两个， 其他还有很多第三方维护的ingress-controller，具体可以参考官方文档。 但是不管哪一种ingress-controller，实现的机制都大同小异，只是在具体配置上有差异。
一般来说，ingress-controller的形式都是一个pod，里面跑着daemon程序和反向代理程序。 daemon负责不断监控集群的变化，根据 ingress对象生成配置并应用新配置到反向代理，比如ingress-nginx就是动态生成nginx配置，动态更新upstream，并在需要的时候reload程序应用新配置。 为了方便，后面的例子都以k8s官方维护的ingress-nginx为例
Ingress-Nginx github 地址： https://github.com/kubernetes/ingress-nginx
**Ingress-Nginx 官方网站：**https://kubernetes.github.io/ingress-nginx/
ingress-controller才是负责具体转发的组件，通过各种方式将它暴露在集群入口，外部对集群的请求流量会先到 ingress-controller， 而ingress对象是用来告诉ingress-controller该如何转发请求，比如哪些域名、哪些URL要转发到哪些service等等
ingress工作原理
（1）ingress-controller通过和 kubernetes APIServer 交互，动态的去感知集群中ingress规则变化
（2）然后读取它，按照自定义的规则，规则就是写明了哪个域名对应哪个service，生成一段nginx配置
（3）再写到nginx-ingress-controller的pod里，这个ingress-controller的pod里运行着一个Nginx服务，控制器会把生成的 nginx配置写入 /etc/nginx.conf文件中，
（4）然后reload一下使配置生效。 以此达到域名区分配置和动态更新的作用
部署nginx-ingress-controller
bash
1.部署ingress-controller pod及相关资源
mkdir /mnt/ingress
cd /mnt/ingress
官方下载地址：
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.25.0/deploy/static/mandatory.yaml
上面可能无法下载，可用国内的 gitee
wget https://gitee.com/mirrors/ingress-nginx/raw/nginx-0.25.0/deploy/static/mandatory.yaml
wget https://gitee.com/mirrors/ingress-nginx/raw/nginx-0.30.0/deploy/static/mandatory.yaml
#mandatory.yaml文件中包含了很多资源的创建，包括namespace、ConfigMap、role，ServiceAccount等等所有部署ingress-controller需要的资源
2.修改ClusterRole资源配置
vim mandatory.yaml
......
apiVersion: rbac.authorization.k8s.io/v1beta1
#RBAC相关资源从1.17版本开始改用rbac.authorization.k8s.io/v1，rbac.authorization.k8s.io/v1beta1在1.22版本即将弃用
kind: ClusterRole
metadata:
name: nginx-ingress-clusterrole
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
rules:
- apiGroups:
- ""
resources:
- configmaps
- endpoints
- nodes
- pods
- secrets
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- apiGroups:
- ""
resources:
- services
verbs:
- get
- list
- watch
- apiGroups:
- "extensions"
- "networking.k8s.io" # （0.25版本）增加 networking.k8s.io Ingress 资源的 api
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- events
verbs:
- create
- patch
- apiGroups:
- "extensions"
- "networking.k8s.io" # （0.25版本）增加 networking.k8s.io/v1 Ingress 资源的 api
resources:
- ingresses/status
verbs:
- updateingress 暴露服务的方式
Deployment+LoadBalancer 模式的 Service
如果要把ingress部署在公有云，那用这种方式比较合适。用Deployment部署ingress-controller，创建一个 type为 LoadBalancer 的 service 关联这组 pod。大部分公有云，都会为 LoadBalancer 的 service 自动创建一个负载均衡器，通常还绑定了公网地址。 只要把域名解析指向该地址，就实现了集群服务的对外暴露
DaemonSet+HostNetwork+nodeSelector
用DaemonSet结合nodeselector来部署ingress-controller到特定的node上，然后使用HostNetwork直接把该pod与宿主机node的网络打通，直接使用宿主机的80/433端口就能访问服务。这时，ingress-controller所在的node机器就很类似传统架构的边缘节点，比如机房入口的nginx服务器。该方式整个请求链路最简单，性能相对NodePort模式更好。缺点是由于直接利用宿主机节点的网络和端口，一个node只能部署一个ingress-controller pod。 比较适合大并发的生产环境使用
Deployment+NodePort模式的Service
同样用deployment模式部署ingress-controller，并创建对应的service，但是type为NodePort。这样，ingress就会暴露在集群节点ip的特定端口上。由于nodeport暴露的端口是随机端口，一般会在前面再搭建一套负载均衡器来转发请求。该方式一般用于宿主机是相对固定的环境ip地址不变的场景
NodePort方式暴露ingress虽然简单方便，但是NodePort多了一层NAT，在请求量级很大时可能对性能会有一定影响
DaemonSet+HostNetwork+nodeSelector
bash
3.指定 nginx-ingress-controller 运行在 node02 节点
kubectl label node node02 ingress=true
kubectl get nodes --show-labels
NAME STATUS ROLES AGE VERSION LABELS
master01 Ready control-plane,master 18d v1.20.11 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=master01,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node-role.kubernetes.io/master=
node01 Ready <none> 18d v1.20.11 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,emmm=a,kubernetes.io/arch=amd64,kubernetes.io/hostname=node01,kubernetes.io/os=linux
node02 Ready <none> 18d v1.20.11 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,emmm=b,ingress=true,kubernetes.io/arch=amd64,kubernetes.io/hostname=node02,kubernetes.io/os=linux
4.修改Deployment 为 DaemonSet 指定节点运行，并开启hostNetwork网络
vim mandatory.yaml
...
apiVersion: apps/v1
# 修改 kind
# kind: Deployment
kind: DaemonSet
metadata:
name: nginx-ingress-controller
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
spec:
# 删除Replicas
# replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
template:
metadata:
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
annotations:
prometheus.io/port: "10254"
prometheus.io/scrape: "true"
spec:
# 使用主机网络
hostNetwork: true
# 选择节点运行
nodeSelector:
ingress: "true"
serviceAccountName: nginx-ingress-serviceaccount
......
5、在所有 node 节点上传 nginx-ingress-controller 镜像压缩包 ingree.contro.tar.gz 到 /mnt目录，并解压和加载镜像
cd /mnt
tar zxvf ingree.contro.tar.gz
docker load -i ingree.contro.tar
6、启动 nginx-ingress-controller
kubectl apply -f mandatory.yaml
#nginx-ingress-controller 已经运行 node02 节点
kubectl get pod -n ingress-nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-controller-f28pz 1/1 Running 0 7m4s 192.168.111.9 node02 <none> <none>
kubectl get cm,daemonset -n ingress-nginx -owide
NAME DATA AGE
configmap/ingress-controller-leader-nginx 0 21m
configmap/kube-root-ca.crt 1 22m
configmap/nginx-configuration 0 22m
configmap/tcp-services 0 22m
configmap/udp-services 0 22m
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE CONTAINERS IMAGES SELECTOR
daemonset.apps/nginx-ingress-controller 1 1 1 1 1 ingress=true 22m nginx-ingress-controller quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.25.0 app.kubernetes.io/name=ingress-nginx,app.kubernetes.io/part-of=ingress-nginx
到 node02 节点查看
netstat -lntp| grep nginx
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 68532/nginx: master
tcp 0 0 0.0.0.0:8181 0.0.0.0:* LISTEN 68532/nginx: master
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 68532/nginx: master
tcp6 0 0 :::10254 :::* LISTEN 68493/nginx-ingress
由于配置了 hostnetwork，nginx 已经在 node 主机本地监听 80/443/8181 端口。其中 8181 是 nginx-controller 默认配置的一个 default backend（Ingress 资源没有匹配的 rule 对象时，流量就会被导向这个 default backend）。
这样，只要访问 node 主机有公网 IP，就可以直接映射域名来对外网暴露服务了。如果要 nginx 高可用的话，可以在多个 node上部署，并在前面再搭建一套 LVS+keepalived 做负载均衡
7.创建ingress规则
#创建一个deploy 和 svc
vim service-nginx.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-app
spec:
replicas: 2
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx-app-svc
spec:
type: ClusterIP
ports:
- protocol: TCP
port: 80
targetPort: 80
selector:
app: nginx
vim ingress-app.yaml
apiVersion: networking.k8s.io/v1
kind: Ingerss
metadata:
name: nginx-app-ingress
spec:
rules:
- host: www.emmm.com
http:
- path: /
pathType: Prefix
backend:
service:
name: nginx-app-svc
port:
number: 80
kubectl apply -f service-nginx.yaml
kubectl apply -f ingress-app.yaml
kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-app-845d4d9dff-hqqg5 1/1 Running 0 11m
nginx-app-845d4d9dff-zm4t9 1/1 Running 0 11m
kubectl get ingress
kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
nginx-app-ingress <none> www.emmm.com 80 76s
8、测试访问
//本地 host 添加域名解析
vim /etc/hosts
192.168.111.7 master01
192.168.111.8 node01
192.168.111.9 node02
#192.168.111.10 hub.emmm.com
192.168.111.10 stor01
192.168.111.9 www.emmm.com
curl www.emmm.com
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
9.查看nginx-ingress-controller
kubectl get pod -n ingress-nginx -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-controller-f28pz 1/1 Running 0 90m 192.168.111.9 node02 <none> <none>
kubectl exec -it nginx-ingress-controller-f28pz -n ingress-nginx /bin/bash
# more /etc/nginx/nginx.conf
#可以看到从 start server www.emmm.com 到 end server www.emmm.com 之间包含了此域名用于反向代理的配置Deployment+NodePort模式的Service
bash
1.下载 nginx-ingress-controller 和 ingress-nginx 暴露端口配置文件
mkdir /mnt/ingress-nodeport
cd /mnt/ingress-nodeport
官方下载地址：
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.30.0/deploy/static/mandatory.yaml
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.30.0/deploy/static/provider/baremetal/service-nodeport.yaml
国内 gitee 资源地址：
wget https://gitee.com/mirrors/ingress-nginx/raw/nginx-0.30.0/deploy/static/mandatory.yaml
wget https://gitee.com/mirrors/ingress-nginx/raw/nginx-0.30.0/deploy/static/provider/baremetal/service-nodeport.yaml
2、在所有 node 节点上传镜像包 ingress-controller-0.30.0.tar 到 /opt/ingress-nodeport 目录，并加载镜像
docker load -i ingress-controller-0.30.0.tar
3、启动 nginx-ingress-controller
kubectl apply -f mandatory.yaml
kubectl apply -f service-nodeport.yaml
-----------------------------------------------------------------------------------------
//如果K8S Pod 调度失败，在 kubectl describe pod资源时显示：
Warning FailedScheduling 18s (x2 over 18s) default-scheduler 0/2 nodes are available: 2 node(s) didn't match node selector
解决方案：
1. 给需要调度的node加上对应标签
# 相对上面这个Yaml文件的例子
kubectl label nodes node_name kubernetes.io/os=linux
2. 删除Yaml文件中的nodeSelector，如果对节点没有要求的话，直接删除节点选择器即可
-----------------------------------------------------------------------------------------
kubectl get pod,svc -n ingress-nginx
NAME READY STATUS RESTARTS AGE
pod/nginx-ingress-controller-54b86f8f7b-wc7r7 1/1 Running 0 104s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/ingress-nginx NodePort 10.96.113.131 <none> 80:31281/TCP,443:31688/TCP 10s
Ingress HTTP 代理访问
cd /mnt/ingress-nodeport
#创建 deployment、Service、Ingress Yaml 资源
vim ingress-nginx.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-app
spec:
replicas: 2
selector:
matchLabels:
name: nginx
template:
metadata:
labels:
name: nginx
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx-svc
spec:
ports:
- port: 80
targetPort: 80
protocol: TCP
selector:
name: nginx
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: nginx-test
spec:
rules:
- host: www.emmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: nginx-svc
port:
number: 80
kubectl apply -f ingress-nginx.yaml
kubectl get svc,pods -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 19d <none>
service/nginx-svc ClusterIP 10.96.229.128 <none> 80/TCP 61s name=nginx
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/nginx-app-57dd86f5cc-9pj8h 1/1 Running 0 28s 10.244.2.95 node02 <none> <none>
pod/nginx-app-57dd86f5cc-txfqp 1/1 Running 0 27s 10.244.1.131 node01 <none> <none>
kubectl exec -it pod/nginx-app-57dd86f5cc-9pj8h bash
# cd /usr/share/nginx/html/
# echo 'this is web1' >> index.html
kubectl exec -it pod/nginx-app-57dd86f5cc-txfqp bash
# cd /usr/share/nginx/html/
# echo 'this is web2' >> index.html
#进行测试
curl 10.96.229.128
kubectl get pod -n ingress-nginx -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-ingress-controller-54b86f8f7b-wc7r7 1/1 Running 0 17m 10.244.1.130 node01 <none> <none>
kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.96.113.131 <none> 80:31281/TCP,443:31688/TCP 16m
本地 host 添加域名解析
vim /etc/hosts
192.168.111.8 www.emmm.com
#测试
www.emmm.com:31281
ingress HTTP 访问虚拟主机
mkdir /mnt/ingress-nodeport/vhost
cd /mnt/ingress-nodeport/vhost
#创建虚拟机1资源
vim deployment1.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deployment1
spec:
replicas: 2
selector:
matchLabels:
name: nginx1
template:
metadata:
labels:
name: nginx1
spec:
containers:
- name: nginx1
image: soscscs/myapp:v1
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: svc-1
spec:
ports:
- port: 80
targetPort: 80
protocol: TCP
selector:
name: nginx1
kubectl apply -f deployment1.yaml
vim deployment2.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deployment2
spec:
replicas: 2
selector:
matchLabels:
name: nginx2
template:
metadata:
labels:
name: nginx2
spec:
containers:
- name: nginx2
image: soscscs/myapp:v2
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: svc-2
spec:
ports:
- port: 80
targetPort: 80
protocol: TCP
selector:
name: nginx2
kubectl apply -f deployment2.yaml
#创建ingress资源
vim ingress-nginx.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress1
spec:
rules:
- host: www1.emmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: svc-1
port:
number: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress2
spec:
rules:
- host: www2.emmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: svc-2
port:
number: 80
kubectl apply -f ingress-nginx.yaml
#测试访问
kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.96.113.131 <none> 80:31281/TCP,443:31688/TCP 29m
curl www1.emmm.com:31281
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
curl www2.emmm.com:31281
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Ingress HTTPS 代理访问
mkdir /mnt/ingress-nodeport/https
cd /mnt/ingress-nodeport/https
#创建ssl证书
openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=nginxsvc/O=nginxsvc"
#创建 secret 资源进行存储
kubectl create secret tls tls-secret --key tls.key --cert tls.crt
kubectl get secret
NAME TYPE DATA AGE
default-token-kr2xl kubernetes.io/service-account-token 3 19d
mysecret Opaque 2 26h
mysecret1 Opaque 2 26h
nfs-client-provisioner-token-nszdh kubernetes.io/service-account-token 3 2d23h
tls-secret kubernetes.io/tls 2 4s
kubectl describe secret tls-secret
Name: tls-secret
Namespace: default
Labels: <none>
Annotations: <none>
Type: kubernetes.io/tls
Data
====
tls.key: 1704 bytes
tls.crt: 1143 bytes
#创建 deployment、Service、Ingress Yaml 资源
vim ingress-https.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-app
spec:
replicas: 2
selector:
matchLabels:
name: nginx
template:
metadata:
labels:
name: nginx
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx-svc
spec:
ports:
- port: 80
targetPort: 80
protocol: TCP
selector:
name: nginx
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: nginx-https
spec:
tls:
- hosts:
- www3.kgc.com
secretName: tls-secret
rules:
- host: www3.emmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: nginx-svc
port:
number: 80
kubectl apply -f ingress-https.yaml
kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.96.113.131 <none> 80:31281/TCP,443:31688/TCP 36m
#访问测试
在宿主机的 C:\Windows\System32\drivers\etc\hosts 文件中添加 192.168.111.8 www3.emmm.com 记录。
使用谷歌浏览器访问 https://www3.emmm.com:31688
#Nginx 进行 BasicAuth
mkdir /mnt/ingress-nodeport/basic-auth
cd /mnt/ingress-nodeport/basic-auth
#生成用户密码认证文件，创建 secret 资源进行存储
yum -y install httpd
htpasswd -c auth emmmm #认证文件名必须为 auth
kubectl create secret generic basic-auth --from-file=auth
#创建 ingress 资源
vim ingress-auth.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-auth
annotations:
#设置认证类型basic
nginx.ingress.kubernetes.io/auth-type: basic
#设置secret资源名称basic-auth
nginx.ingress.kubernetes.io/auth-secret: basic-auth
#设置认证窗口提示信息
nginx.ingress.kubernetes.io/auth-realm: 'Authentication Required - emmmm'
spec:
rules:
- host: auth.emmmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: nginx-svc
port:
number: 80
//具体详细设置方法可参考官网https://kubernetes.github.io/ingress-nginx/examples/auth/basic/
kubectl apply -f ingress-auth.yaml
#访问测试
kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.96.113.131 <none> 80:31281/TCP,443:31688/TCP 48m
echo '192.168.111.8 auth.emmmm.com' >> /etc/hosts
浏览器访问：http://auth.emmmm.com:31281
Nginx 进行重写
#metadata.annotations 配置说明
●nginx.ingress.kubernetes.io/rewrite-target: <字符串> #必须重定向流量的目标URI
●nginx.ingress.kubernetes.io/ssl-redirect: <布尔值> #指示位置部分是否仅可访问SSL(当Ingress包含证书时，默认为true)
●nginx.ingress.kubernetes.io/force-ssl-redirect: <布尔值> #即使Ingress未启用TLS，也强制重定向到HTTPS
●nginx.ingress.kubernetes.io/app-root: <字符串> #定义Controller必须重定向的应用程序根，如果它在'/'上下文中
●nginx.ingress.kubernetes.io/use-regex: <布尔值> #指示Ingress上定义的路径是否使用正则表达式
vim ingress-rewrite.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: nginx-rewrite
annotations:
nginx.ingress.kubernetes.io/rewrite-target: http://www1.emmm.com:31281
spec:
rules:
- host: re.emmm.com
http:
paths:
- path: /
pathType: Prefix
backend:
#由于re.emmm.com只是用于跳转不需要真实站点存在，因此svc资源名称可随意定义
service:
name: nginx-svc
port:
number: 80
kubectl apply -f ingress-rewrite.yaml
echo '192.168.111.8 re.emmm.com' >> /etc/hosts
浏览器访问：http://re.kgc.com:31281