service几种访问类型
集群外负载均衡访问LoadBalancer ， 集群内访问ClusterIP，集群内访问headless ClusterIP，VPC内网负载均衡LoadBalancer ，集群外访问NodePort
一、集群外访问（负载均衡）
kind: Service
apiVersion: v1
spec:
ports:
- protocol: TCP
port: 4341
targetPort: 8080
nodePort: 30875
type: LoadBalancer
externalIPs: #外部负载均衡
- 172.30.10.4
- 172.30.10.3
sessionAffinity: None
externalTrafficPolicy: Cluster
二、k8s集群内访问
clusterip service
kind: Service
apiVersion: v1
spec:
clusterIP: 10.43.22.26 （如果不填，会自动添加）
ports:
- protocol: TCP
port: 4321
targetPort: 8080
type: ClusterIP
externalIPs: #集群内互访 可选
- 172.30.10.201
- 172.30.10.42
headless service
spec:
clusterIP: None
ports:
- name: tcp-postgresql
port: 5432
protocol: TCP
targetPort: tcp-postgresql
selector:
app: postgresql
type: ClusterIP
三、vpc内网负载均衡
kind: Service
apiVersion: v1
metadata:
annotations:
kubernetes.io/elb.class: elasticity #表示选择的是经典负载均衡实例
kubernetes.io/elb.vpc.id: 0e86e303-7a82-4e03-a435-9be0c4771c93 #负载均衡所在vpc的ID
spec:
ports:
- name: cce-service-0
protocol: TCP
port: 4321
targetPort: 8080
nodePort: 31118
type: LoadBalancer
loadBalancerIP: 172.30.12.33
sessionAffinity: None
externalTrafficPolicy: Cluster
四、集群外访问，NodePort
apiVersion: v1
kind: Service
metadata:
labels:
app: prometheus-operator-operator
name: my-release-prometheus-oper-operator
namespace: default
spec:
ports:
- name: http
port: 8080
protocol: TCP
targetPort: http
nodePort: 30080
selector:
app: prometheus-operator-operator
sessionAffinity: None
type: NodePort
