标签:contain dep type pac -- mem 代码 client def
Service Mesh 架构下,服务间调用会通过服务名(Service Name)互相调用,比如在 Kubernetes 、Docker Swarm 集群中,服务 IP 均由集群动态分配,外部网络无法直接访问到集群内部的服务。对于大型系统,微服务的数量较多,服务间的调用关系也错综复杂,遇到问题时,本地启动整个服务集群去 Debug,不仅需要本地电脑有很高的配置,而且操作起来也比较麻烦。比较优雅一点的做法是本地启动相应服务,gRPC 调用都连接到远程集群。
Nginx 版本 1.13.10
之后支持 gRPC 反向代理,这样我们就能通过在集群中部署 Nginx 服务,来连通外部网络和集群内的服务。
1、Deploy gRPC Server In Kubernetes Cluster
python:3
的容器,为下面的代码提供运行环境pip install python-grpc
安装依赖python-grpc
目录下执行 python server/server.py
,观察日志,等待 gRPC server 启动成功kind: Service
apiVersion: v1
metadata:
name: server-a-service
namespace: default
spec:
ports:
- port: 6565
targetPort: 6565
selector:
app: server-a
2、Deploy Nginx gRPC Proxy In Kubernetes Cluster
以下内容包含 Nginx Config、Nginx Deployment 和 Nginx Service,提供了 gRPC 请求的转发能力:
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-grpc-proxy-config
namespace: default
data:
grpc.conf: |
server {
listen 6565 http2;
server_name server-a-service;
location / {
grpc_pass grpc://server-a-service.default:6565;
}
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-grpc-proxy-deployment
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: nginx-grpc-proxy
template:
metadata:
labels:
app: nginx-grpc-proxy
spec:
containers:
- name: nginx-grpc-proxy
image: nginx:1.17
ports:
- containerPort: 6565
volumeMounts:
- mountPath: /etc/nginx/conf.d/
name: nginx-config
volumes:
- name: nginx-config
configMap:
name: nginx-grpc-proxy-config
---
kind: Service
apiVersion: v1
metadata:
name: nginx-grpc-proxy-service
namespace: default
spec:
ports:
- port: 6565
targetPort: 6565
nodePort: 30000
selector:
app: nginx-grpc-proxy
type: NodePort
3、Test Local Client Connect Remote Server
<k8s 公网 IP> server-a-service
pip3 install python-grpc
安装依赖(需要 python3 的环境)python-grpc
下修改文件 client/client.py
servers = [Server('test', '127.0.0.1', 6565)]
# 变更为
servers = [Server('test', 'server-a-service', 30000)]
python3 client/client.py
测试远程调用是否正常(示例中包含正常调用和异常调用)多个远程 gRPC 服务如何配置 nginx?
nginx 配置文件中添加多个 server 记录:
server {
listen 6565 http2;
server_name server-a-service;
location / {
grpc_pass grpc://server-a-service.default:6565;
}
}
server {
listen 6565 http2;
server_name server-b-service;
location / {
grpc_pass grpc://server-b-service.default:6565;
}
}
本地 host 需要添加相应的记录:
<k8s 公网 IP> server-a-service
<k8s 公网 IP> server-b-service
标签:contain dep type pac -- mem 代码 client def
原文地址:https://www.cnblogs.com/anoyi/p/12408685.html