kubernetes Ingress Nginx Controller

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发布于 2021-11-15 17:29:51

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发布于 2021-11-15 17:29:51

文章被收录于专栏：云原生生态圈

克隆ingress-nginx-controller 仓库到本地

实验使用版本: https://github.com/opsenv/ingress-nginx
官方仓库地址: https://github.com/kubernetes/ingress-nginx

fork仓库地址到opsenv下部署的清单文件在deploy目录下,修改的配置清单已经在https://github.com/opsenv/ingress-nginx 下的deploy目录下
因为国内拉取ingress-nginx-controller很慢,所以先准备好镜像

docker pull bluerdocker/nginx-ingress-controller:0.21.0docker tag bluerdocker/nginx-ingress-controller:0.21.0 quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.21.0

安装ingress-nginx-controller

cd /opt/k8s/works/
git clone https://github.com/opsenv/ingress-nginxcd ingress-nginx/deploy
kubectl apply -f .
root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get pods -n ingress-nginxNAME                                       READY   STATUS    RESTARTS   AGE
nginx-ingress-controller-f7667b986-sgwr6   1/1     Running   0          72m

kubectl apply -f  https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/baremetal/service-nodeport.yaml

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get svc -n ingress-nginxNAME            TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
ingress-nginx   NodePort   10.254.112.213   <none>        80:30756/TCP,443:30135/TCP   47m

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get configmap -n ingress-nginxNAME                              DATA   AGE
ingress-controller-leader-nginx   0      3d16h
nginx-configuration               0      3d16h
tcp-services                      0      3d16h
udp-services                      0      3d16h

部署一个app 使用replicaset创建pod replicaSet-demo1.yaml

apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: myapp-rs
namespace: devops
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: canary
env: dev
template:
metadata:
name: myapp-rs-pod
namespace: devops
labels:
app: myapp
release: canary
env: dev
spec:
containers:
- name: myapp-rs-container
image: ikubernetes/myapp:v1
imagePullPolicy: IfNotPresent
ports:
- name: http
containerPort: 80
- name: https
containerPort: 443

kubectl apply -f replicaSet-demo1.yaml
root@k8s-m1:/opt/k8s/work/manifests# kubectl get rs -n devopsNAME                           DESIRED   CURRENT   READY   AGE
myapp-rs                       2         2         2       2m50s

root@k8s-m1:/opt/k8s/work/manifests# kubectl get pods -n devopsNAME                                 READY   STATUS    RESTARTS   AGE
myapp-rs-7hbcx                       1/1     Running   0          3m1s
myapp-rs-rm5qq                       1/1     Running   0          3m1s

为myapp pod创建一个服务

创建名为myapp-svc.yaml

apiVersion: v1
kind: Service
metadata:
name: myapp
namespace: devops
spec:
selector:
app: myapp
release: canary
clusterIP: 10.254.189.200
type: ClusterIP
ports:
- name: http
port: 80
targetPort: 80

给myapp创建一个ingress资源

创建名为ingress-myapp.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-myapp
namespace: devops
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: myapp.xsllab.com
http:
paths:
- path:
backend:
serviceName: myapp
servicePort: 80

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get ingress -n devopsNAME                 HOSTS               ADDRESS   PORTS     AGE
ingress-myapp        myapp.xsllab.com              80        3d15h

查看ingress-nginx-controller中的变化

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get pods -n ingress-nginxNAME                                       READY   STATUS    RESTARTS   AGE
nginx-ingress-controller-f7667b986-sgwr6   1/1     Running   0          3d16h

kubectl exec -it nginx-ingress-controller-f7667b986-sgwr6 -n ingress-nginx -- /bin/bash
www-data@nginx-ingress-controller-f7667b986-sgwr6:/etc/nginx$ cat nginx.conf |grep myapp## start server myapp.xsllab.comserver_name myapp.xsllab.com ;set $ingress_name   "ingress-myapp";set $service_name   "myapp";set $proxy_upstream_name "devops-myapp-80";## end server myapp.xsllab.comroot@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get svc -n ingress-nginxNAME            TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
ingress-nginx   NodePort   10.254.112.213   <none>        80:30756/TCP,443:30135/TCP   3d16h

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# echo "192.168.10.247 myapp.xsllab.com" >> /etc/hostsroot@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# curl http://myapp.xsllab.com:30756Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# curl http://myapp.xsllab.com:30756/hostname.htmlmyapp-rs-7hbcx

通过secret配置一个ssl证书

openssl genrsa -out tls.key 2048openssl req -new -x509 -key tls.key -out tls-myapp.crt -subj /C=CN/ST=Beijing/L=Beijing/CN=myapp.xsllab.com
kubectl create secret tls myapp-ingress-secret --cert=tls-myapp.crt --key=tls.key -n devops

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get secret -n devopsNAME                    TYPE                                  DATA   AGE
default-token-wqr7h     kubernetes.io/service-account-token   3      15d
myapp-ingress-secret    kubernetes.io/tls                     2      24s
tomcat-ingress-secret   kubernetes.io/tls                     2      3d15h

kubectl describe secret myapp-ingress-secret -n devops

给myapp配置一个机遇tls的服务

创建名称为: ingress-myapp-tls.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-myapp-tls
namespace: devops
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: myapp.xsllab.com
http:
paths:
- path:
backend:
serviceName: myapp
servicePort: 80
tls:
- hosts:
- myapp.xsllab.com
secretName: myapp-ingress-secret

root@k8s-m1:/opt/k8s/work/manifests/ingress-nginx/deploy# kubectl get ingress -n devopsNAME                 HOSTS               ADDRESS   PORTS     AGE
ingress-myapp        myapp.xsllab.com              80        3d16h
ingress-myapp-tls    myapp.xsllab.com              80, 443   18s
ingress-tomcat       tomcat.xsllab.com             80        3d15h
ingress-tomcat-tls   tomcat.xsllab.com             80, 443   3d15h