# go-moda
* golang 通用的 grpc http 基础开发框架,集成 http(echo、gin)和 grpc。openTelemetry 实现微务链路追踪, pprof:
* [仓库地址](https://github.com/webws/go-moda): [https://github.com/webws/go-moda](https://github.com/webws/go-moda
* 仓库一直在更新,欢迎大家吐槽和指点
## 特性
- transport: 集成 http(echo、gin)和 grpc。
- tracing: openTelemetry 实现微务链路追踪
- pprof: 分析性能
- config: 通用的配置文件读取模块,支持 toml、yaml 和 json 格式。
- logger: 日志系统模块,基于 Zap,并支持全局日志和模块日志。
## 快速使用
#### conf.toml
```toml
http_addr = ":8081"
grpc_addr = ":8082"
```
#### 启用http(gin) 和 grpc服务
``` golang
package main
import (
"context"
"net/http"
"github.com/gin-gonic/gin"
app "github.com/webws/go-moda"
"github.com/webws/go-moda/config"
pbexample "github.com/webws/go-moda/example/pb/example"
"github.com/webws/go-moda/logger"
modagrpc "github.com/webws/go-moda/transport/grpc"
modahttp "github.com/webws/go-moda/transport/http"
)
var ServerName string
type Config struct {
HttpAddr string `json:"http_addr" toml:"http_addr"`
GrpcAddr string `json:"grpc_addr" toml:"grpc_addr"`
}
func main() {
conf := &Config{}
if err := config.NewConfigWithFile("./conf.toml").Load(conf); err != nil {
logger.Fatalw("NewConfigWithFile fail", "err", err)
}
// http server
gin, httpSrv := modahttp.NewGinHttpServer(
modahttp.WithAddress(conf.HttpAddr),
)
registerHttp(gin)
// grpc server
grpcSrv := modagrpc.NewServer(
modagrpc.WithServerAddress(conf.GrpcAddr),
)
grecExample := &ExampleServer{}
pbexample.RegisterExampleServiceServer(grpcSrv, grecExample)
// app run
a := app.New(
app.Server(httpSrv, grpcSrv),
app.Name(ServerName),
)
if err := a.Run(); err != nil {
logger.Fatalw("app run error", "err", err)
}
}
func registerHttp(g *gin.Engine) {
g.GET("/helloworld", func(c *gin.Context) {
logger.Debugw("Hello World")
c.JSON(http.StatusOK, http.StatusText(http.StatusOK))
})
}
type ExampleServer struct {
pbexample.UnimplementedExampleServiceServer
}
func (s *ExampleServer) SayHello(ctx context.Context, req *pbexample.HelloRequest) (*pbexample.HelloResponse, error) {
return &pbexample.HelloResponse{Message: "Hello " + req.Name}, nil
}
```
#### 运行
```shell
go run ./ -c ./conf.toml
``````
* 请求 http url http://localhost:8081/helloworld
* grpc 服务 使用 gRPC 客户端调用 SayHello 方法
其他服务启用示例
1. echo http :[example_echo](https://github.com/webws/go-moda/tree/main/example/echohttp)
2. net http :[example_echo](https://github.com/webws/go-moda/blob/main/example/nethttp)
3. grpc [example_grpc](https://github.com/webws/go-moda/tree/main/example/grpc)
## pprof 性能分析
启动服务默认开启 pprof 性能分析,浏览器打开 http://localhost:8081/debug/ 查看
![](https://qiniu.taoluyuan.com/2023/blog20230903093830.png?imageMogr2/auto-orient/thumbnail/!70p/blur/9x0/quality/75)
可视化分析 gouroutine
```shell
go tool pprof http://localhost:8081/debug/pprof/goroutine
(pprof) web
```
可能提示 需要先安装 graphviz, mac 下可以使用 brew 安装
```shell
brew install graphviz
```
![](https://qiniu.taoluyuan.com/2023/blog20230903094758.png?imageMogr2/auto-orient/thumbnail/!70p/blur/9x0/quality/75)
## tracing 链路追踪
* 使用 opentelemetry 实现微服务链路追踪,目前 exporter 支持 jaeger
* 示例集成了docker 环境,支持 make deploy 同时启动 jaeger,api1,api2,api3,grpc 服务
* 详细示例请看:[tracing_example](https://github.com/webws/go-moda/tree/main/example/tracing/moda_tracing)
1. 初始化 jaeger tracing
```
import "github.com/webws/go-moda/tracing"
func main(){
//...
shutdown, err := tracing.InitJaegerProvider(conf.JaegerUrl, "grpc-server")
if err != nil {
panic(err)
}
defer shutdown(context.Background())
//...
}
```
2. 在代码主动tracing start
```
ctx, span := tracing.Start(c.Request().Context(), "api1")
defer span.End()
```
3. 服务之间调用 产生的链路
* server端: 增加 WithTracing 即可
```
//...
gin, httpSrv := modahttp.NewGinHttpServer(
modahttp.WithAddress(conf.HttpAddr),
modahttp.WithTracing(true),
)
```
* client端: 封装了 CallAPI 方法, 已将span ctx 信息注入到请求头
```
// ...
_, err := modahttp.CallAPI(ctx, url, "POST", nil)
```
![](https://qiniu.taoluyuan.com/2023/blog20230903094038.png?imageMogr2/auto-orient/thumbnail/!70p/blur/9x0/quality/75)
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