K8S服务发布

1.nodePort对外发布服务

[root@master ~]# vim mysvc1.yaml[root@master ~]# vim mysvc1.yaml
---
kind: Service
apiVersion: v1
metadata:
  name: mysvc1
spec:
  type: NodePort            # 服务类型
  selector:
    app: web
  ports:
  - protocol: TCP
    port: 80
    nodePort: 30080         # 映射端口号
    targetPort: myhttp

[root@master ~]# kubectl apply -f mysvc1.yaml 
service/mysvc configured
[root@master ~]# kubectl get service
NAME         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)
kubernetes   ClusterIP   10.245.0.1    <none>        443/TCP
mysvc        ClusterIP   10.245.1.80   <none>        80/TCP
mysvc1       NodePort    10.245.1.88   <none>        80:30080/TCP

[root@master ~]# curl http://node-0001:30080
Welcome to The Apache.
[root@master ~]# curl http://node-0002:30080
Welcome to The Apache.
[root@master ~]# curl http://node-0003:30080
Welcome to The Apache.
[root@master ~]# curl http://node-0004:30080
Welcome to The Apache.
[root@master ~]# curl http://node-0005:30080
Welcome to The Apache.

2.Ingress对外发布服务

2.1安装控制器

[root@master ~]# cd plugins/ingress
[root@master ingress]# docker load -i ingress.tar.xz
[root@master ingress]# docker images|while read i t _;do
    [[ "${t}" == "TAG" ]] && continue
    [[ "${i}" =~ ^"harbor:443/".+ ]] && continue
    docker tag ${i}:${t} harbor:443/plugins/${i##*/}:${t}
    docker push harbor:443/plugins/${i##*/}:${t}
    docker rmi ${i}:${t} harbor:443/plugins/${i##*/}:${t}
done
[root@master ingress]# sed -ri 's,^(\s*image: )(.*/)?(.+)@.*,\1harbor:443/plugins/\3,' deploy.yaml
458:    image: harbor:443/plugins/controller:v1.5.1
565:    image: harbor:443/plugins/kube-webhook-certgen:v20220916-gd32f8c343
614:    image: harbor:443/plugins/kube-webhook-certgen:v20220916-gd32f8c343

[root@master ingress]# kubectl apply -f deploy.yaml
# 通过标签指定在那台机器上发布应用
[root@master ingress]# kubectl label nodes node-0001 ingress-ready="true"
node/node-0001 labeled
[root@master ingress]# kubectl label nodes node-0001 ingress-ready="true"
node/node-0001 labeled
[root@master ingress]# kubectl -n ingress-nginx get pods
NAME                                        READY   STATUS      RESTARTS
ingress-nginx-admission-create--1-lm52c     0/1     Completed   0
ingress-nginx-admission-patch--1-sj2lz      0/1     Completed   0
ingress-nginx-controller-5664857866-tql24   1/1     Running     0

2.2验证后端服务

[root@master ~]# kubectl get pods,services[root@master ~]# kubectl get pods,services 
NAME       READY   STATUS    RESTARTS   AGE
pod/web1   1/1     Running   0          35m

NAME                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)
service/kubernetes   ClusterIP   10.245.0.1    <none>        443/TCP
service/mysvc        ClusterIP   10.245.1.80   <none>        80/TCP
service/mysvc1       NodePort    10.245.1.88   <none>        80:30080/TCP

[root@master ~]# curl http://10.245.1.80
Welcome to The Apache.

[root@master ~]# curl http://10.245.1.80[root@master ~]# kubectl get pods,services 
NAME       READY   STATUS    RESTARTS   AGE
pod/web1   1/1     Running   0          35m

NAME                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)
service/kubernetes   ClusterIP   10.245.0.1    <none>        443/TCP
service/mysvc        ClusterIP   10.245.1.80   <none>        80/TCP
service/mysvc1       NodePort    10.245.1.88   <none>        80:30080/TCP

[root@master ~]# curl http://10.245.1.80
Welcome to The Apache.

[root@master ~]# kubectl get pods,services 
NAME       READY   STATUS    RESTARTS   AGE
pod/web1   1/1     Running   0          35m

NAME                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)
service/kubernetes   ClusterIP   10.245.0.1    <none>        443/TCP
service/mysvc        ClusterIP   10.245.1.80   <none>        80/TCP
service/mysvc1       NodePort    10.245.1.88   <none>        80:30080/TCP

[root@master ~]# curl http://10.245.1.80
Welcome to The Apache.

[root@master ~]# kubectl get pods,services

2.3对外发布服务

[root@master ~]# kubectl get ingressclasses.networking.k8s.io 
NAME    CONTROLLER             PARAMETERS   AGE
nginx   k8s.io/ingress-nginx   <none>       5m7s
# 资源对象模板
[root@master ~]# kubectl create ingress mying --class=nginx --rule=nsd.tedu.cn/*=mysvc:80 --dry-run=client -o yaml
[root@master ~]# vim mying.yaml
---
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
  name: mying
spec:
  ingressClassName: nginx
  rules:
  - host: nsd.tedu.cn
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: mysvc
            port:
              number: 80

[root@master ~]# kubectl apply -f mying.yaml 
ingress.networking.k8s.io/mying created
[root@master ~]# kubectl get ingress
NAME    CLASS   HOSTS         ADDRESS        PORTS
mying   nginx   nsd.tedu.cn   192.168.1.51   80
[root@master ~]# curl -H "Host: nsd.tedu.cn" http://192.168.1.51
Welcome to The Apache.