K8S服务发布
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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.
