1.哪些服务适合单独成为一个pod？哪些服务适合在一个pod中？
message消息服务被很多服务调用 单独一个pod
dubbo服务和web服务交互很高放在同一个pod里
API网关调用很多服务 单独一个pod
2.在一个pod里面的服务如何彼此访问？他们的服务如何对外提供服务？
dubbo服务和web服务(在一个pod里)通过本机IP+端口访问
通过service里的clusterip和dns 服务在集群内部访问
course-service.yml
apiVersion: v1
kind: Service
metadata:
labels:
app: course-service
name: course-service
spec:
ports:
- port: 8081
protocol: TCP
targetPort: 8081
selector:
app: course-service
type: ClusterIP
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: course-service-deployment
spec:
replicas: 1
template:
metadata:
labels:
app: course-service
spec:
containers:
- name: course-service
image: {{HUB}}/micro-service/course-service:latest
ports:
- containerPort: 20880
- name: course-edge-service
image: {{HUB}}/micro-service/course-edge-service:latest
ports:
- containerPort: 8081
3.单独的pod如何对外提供服务？
message-service.yml
apiVersion: v1
kind: Service
metadata:
labels:
app: message-service
name: message-service
spec:
ports:
- port: 9090
protocol: TCP
targetPort: 9090
selector:
app: message-service
type: ClusterIP
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: message-service-deployment
spec:
replicas: 1
template:
metadata:
labels:
app: message-service
spec:
containers:
- name: message-service
image: {{HUB}}/micro-service/message-service:latest
ports:
- containerPort: 9090
4.哪个服务作为整个服务的入口，入口服务如何对外提供服务？
通过nodepod,集群外就可以访问这个服务
apigateway.yml
apiVersion: v1
kind: Service
metadata:
labels:
app: api-gateway
name: api-gateway
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8080
nodePort: 80
selector:
app: api-gateway
type: NodePort
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: api-gateway-deployment
spec:
replicas: 1
template:
metadata:
labels:
app: api-gateway
spec:
containers:
- name: api-gateway
image: {{HUB}}/micro-service/api-gateway-zuul:latest
ports:
- containerPort: 8080