介绍
通过一个完整例子，介绍如何优雅关闭 gogf/gf 微服务。
什么是优雅关闭？
在进程收到关闭信号时，我们需要关闭后台运行的逻辑，比如，MySQL 连接等等。
我们将会使用 rk-boot 来启动 gogf/gf 微服务。 rk-boot 是一个可通过 YAML 启动多种 Web 服务的框架。请参考本文最后章节，了解 rk-boot 细节。
请访问如下地址获取完整教程：rkdocs.netlify.app/cn
安装
go get github.com/rookie-ninja/rk-boot/gf
复制代码快速开始
1.创建 boot.yaml
boot.yaml 文件会告诉 rk-boot 如何启动 gogf/gf 服务。
---
gf:
- name: greeter
port: 8080
enabled: true
复制代码2.创建 main.go
通过 AddShutdownHookFunc() 来添加 shutdownhook 函数。
这里需要添加： import _ "github.com/rookie-ninja/rk-boot/gf"
否则 rk-boot 无法读取 boot.yaml 文件里的内容。
// Copyright (c) 2021 rookie-ninja
//
// Use of this source code is governed by an Apache-style
// license that can be found in the LICENSE file.
package main
import (
"context"
"fmt"
"github.com/rookie-ninja/rk-boot"
_ "github.com/rookie-ninja/rk-boot/gf"
)
func main() {
// Create a new boot instance.
boot := rkboot.NewBoot()
boot.AddShutdownHookFunc("shutdown-hook", func() {
fmt.Println("shutting down")
})
// Bootstrap
boot.Bootstrap(context.Background())
// Wait for shutdown sig
boot.WaitForShutdownSig(context.Background())
}
复制代码3.启动 main.go
$ go run main.go
2022-01-05T18:24:36.293+0800 INFO boot/gf_entry.go:1050 Bootstrap gfEntry {"eventId": "fabd662e-801c-4c8b-b596-f55001a66d62", "entryName": "greeter"}
------------------------------------------------------------------------
endTime=2022-01-05T18:24:36.293501+08:00
startTime=2022-01-05T18:24:36.293309+08:00
elapsedNano=191536
timezone=CST
ids={"eventId":"fabd662e-801c-4c8b-b596-f55001a66d62"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GfEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"gfPort":8080}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost
operation=Bootstrap
resCode=OK
eventStatus=Ended
EOE
复制代码4.ctrl-c
通过 ctrl-c 关闭程序，我们会看到打印如下信息。
shutting down
2022-01-05T18:24:39.674+0800 INFO boot/gf_entry.go:1050 Interrupt gfEntry {"eventId": "f400e32e-6b99-4733-8ec3-1fe186fe8abe", "entryName": "greeter"}
------------------------------------------------------------------------
endTime=2022-01-05T18:24:39.674817+08:00
startTime=2022-01-05T18:24:39.674688+08:00
elapsedNano=128645
timezone=CST
ids={"eventId":"f400e32e-6b99-4733-8ec3-1fe186fe8abe"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GfEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"gfPort":8080}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost
operation=Interrupt
resCode=OK
eventStatus=Ended
EOE
复制代码rk-boot 介绍
rk-boot 是一个可通过 YAML 启动多种 Web 服务的框架。 有点类似于 Spring boot。通过集成 rk-xxx 系列库，可以启动多种 Web 框架。当然，用户也可以自定义 rk-xxx 库集成到 rk-boot 中。
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rk-boot 亮点
通过同样格式的 YAML 文件，启动不同 Web 框架。
比如，我们可以通过如下文件，在一个进程中同时启动 gRPC, Gin, Echo, GoFrame 框架。统一团队内部的微服务布局。
- 依赖安装
go get github.com/rookie-ninja/rk-boot/grpc
go get github.com/rookie-ninja/rk-boot/gin
go get github.com/rookie-ninja/rk-boot/echo
go get github.com/rookie-ninja/rk-boot/gf
复制代码- boot.yaml
---
grpc:
- name: grpc-server
port: 8080
enabled: true
commonService:
enabled: true
gin:
- name: gin-server
port: 8081
enabled: true
commonService:
enabled: true
echo:
- name: echo-server
port: 8082
enabled: true
commonService:
enabled: true
gf:
- name: gf-server
port: 8083
enabled: true
commonService:
enabled: true
复制代码- main.go
// Copyright (c) 2021 rookie-ninja
//
// Use of this source code is governed by an Apache-style
// license that can be found in the LICENSE file.
package main
import (
"context"
"github.com/rookie-ninja/rk-boot"
_ "github.com/rookie-ninja/rk-boot/echo"
_ "github.com/rookie-ninja/rk-boot/gf"
_ "github.com/rookie-ninja/rk-boot/gin"
_ "github.com/rookie-ninja/rk-boot/grpc"
)
// Application entrance.
func main() {
// Create a new boot instance.
boot := rkboot.NewBoot()
// Bootstrap
boot.Bootstrap(context.Background())
// Wait for shutdown sig
boot.WaitForShutdownSig(context.Background())
}
复制代码- 验证
# gRPC throuth grpc-gateway
$ curl localhost:8080/rk/v1/healthy
{"healthy":true}
# Gin
$ curl localhost:8081/rk/v1/healthy
{"healthy":true}
# Echo
$ curl localhost:8082/rk/v1/healthy
{"healthy":true}
# GoFrame
$ curl localhost:8083/rk/v1/healthy
{"healthy":true}
复制代码rk-boot 支持的 Web 框架
欢迎贡献新的 Web 框架到 rk-boot 系列中。
| 框架 | 开发状态 | 安装 | 依赖 |
|---|---|---|---|
| Gin | Stable | go get github.com/rookie-ninja/rk-boot/gin | rk-gin |
| gRPC | Stable | go get github.com/rookie-ninja/rk-boot/grpc | rk-grpc |
| Echo | Stable | go get github.com/rookie-ninja/rk-boot/echo | rk-echo |
| GoFrame | Stable | go get github.com/rookie-ninja/rk-boot/gf | rk-gf |
| Fiber | Testing | go get github.com/rookie-ninja/rk-boot/fiber | rk-fiber |
| go-zero | Testing | go get github.com/rookie-ninja/rk-boot/zero | rk-zero |
| GorillaMux | Testing | go get github.com/rookie-ninja/rk-boot/mux | rk-mux |
rk-gf 介绍
rk-gf 用于通过 YAML 启动 gogf/gf Web 服务。
支持的功能
根据 YAML 文件初始化如下的实例，如果是外部以来，均保持原生用法。
| 实例 | 介绍 |
|---|---|
| ghttp.Server | 原生 gogf/gf |
| Config | 原生 spf13/viper 参数实例 |
| Logger | 原生 uber-go/zap 日志实例 |
| EventLogger | 用于记录 RPC 请求日志，使用 rk-query |
| Credential | 用于从远程服务，例如 ETCD 拉取 Credential |
| Cert | 从远程服务（ETCD 等等）中获取 TLS/SSL 证书，并启动 SSL/TLS |
| Prometheus | 启动 Prometheus 客户端，并根据需要推送到 pushgateway |
| Swagger | 本地启动 Swagger UI |
| CommonService | 暴露通用 API |
| TV | TV 网页，展示微服务的基本信息 |
| StaticFileHandler | 启动 Web 形式的静态文件下载服务，后台存储支持本地文件系统 和 pkger. |
支持的中间件
rk-gf 会根据 YAML 文件初始化中间件。
| Middleware | Description |
|---|---|
| Metrics | 收集 RPC Metrics，并启动 prometheus |
| Log | 使用 rk-query 记录每一个 RPC 日志 |
| Trace | 收集 RPC 调用链，并且发送数据到 stdout, 本地文件或者 jaeger open-telemetry/opentelemetry-go. |
| Panic | Recover from panic for RPC requests and log it. |
| Meta | 收集服务元信息，添加到返回 Header 中 |
| Auth | 支持 [Basic Auth] & [API Key] 验证中间件 |
| RateLimit | RPC 限速中间件 |
| Timeout | RPC 超时中间件 |
| CORS | CORS 中间件 |
| JWT | JWT 验证 |
| Secure | 服务端安全中间件 |
| CSRF | CSRF 中间件 |
GoFrame 完整 YAML 配置
---
#app:
# description: "this is description" # Optional, default: ""
# keywords: ["rk", "golang"] # Optional, default: []
# homeUrl: "http://example.com" # Optional, default: ""
# iconUrl: "http://example.com" # Optional, default: ""
# docsUrl: ["http://example.com"] # Optional, default: []
# maintainers: ["rk-dev"] # Optional, default: []
#zapLogger:
# - name: zap-logger # Required
# description: "Description of entry" # Optional
#eventLogger:
# - name: event-logger # Required
# description: "Description of entry" # Optional
#cred:
# - name: "local-cred" # Required
# provider: "localFs" # Required, etcd, consul, localFs, remoteFs are supported options
# description: "Description of entry" # Optional
# locale: "*::*::*::*" # Optional, default: *::*::*::*
# paths: # Optional
# - "example/boot/full/cred.yaml"
#cert:
# - name: "local-cert" # Required
# provider: "localFs" # Required, etcd, consul, localFs, remoteFs are supported options
# description: "Description of entry" # Optional
# locale: "*::*::*::*" # Optional, default: *::*::*::*
# serverCertPath: "example/boot/full/server.pem" # Optional, default: "", path of certificate on local FS
# serverKeyPath: "example/boot/full/server-key.pem" # Optional, default: "", path of certificate on local FS
# clientCertPath: "example/client.pem" # Optional, default: "", path of certificate on local FS
# clientKeyPath: "example/client.pem" # Optional, default: "", path of certificate on local FS
#config:
# - name: rk-main # Required
# path: "example/boot/full/config.yaml" # Required
# locale: "*::*::*::*" # Required, default: *::*::*::*
# description: "Description of entry" # Optional
gf:
- name: greeter # Required
port: 8080 # Required
enabled: true # Required
# description: "greeter server" # Optional, default: ""
# cert:
# ref: "local-cert" # Optional, default: "", reference of cert entry declared above
# sw:
# enabled: true # Optional, default: false
# path: "sw" # Optional, default: "sw"
# jsonPath: "" # Optional
# headers: ["sw:rk"] # Optional, default: []
# commonService:
# enabled: true # Optional, default: false
# static:
# enabled: true # Optional, default: false
# path: "/rk/v1/static" # Optional, default: /rk/v1/static
# sourceType: local # Required, options: pkger, local
# sourcePath: "." # Required, full path of source directory
# tv:
# enabled: true # Optional, default: false
# prom:
# enabled: true # Optional, default: false
# path: "" # Optional, default: "metrics"
# pusher:
# enabled: false # Optional, default: false
# jobName: "greeter-pusher" # Required
# remoteAddress: "localhost:9091" # Required
# basicAuth: "user:pass" # Optional, default: ""
# intervalMs: 10000 # Optional, default: 1000
# cert: # Optional
# ref: "local-test" # Optional, default: "", reference of cert entry declared above
# logger:
# zapLogger:
# ref: zap-logger # Optional, default: logger of STDOUT, reference of logger entry declared above
# eventLogger:
# ref: event-logger # Optional, default: logger of STDOUT, reference of logger entry declared above
# interceptors:
# loggingZap:
# enabled: true # Optional, default: false
# zapLoggerEncoding: "json" # Optional, default: "console"
# zapLoggerOutputPaths: ["logs/app.log"] # Optional, default: ["stdout"]
# eventLoggerEncoding: "json" # Optional, default: "console"
# eventLoggerOutputPaths: ["logs/event.log"] # Optional, default: ["stdout"]
# metricsProm:
# enabled: true # Optional, default: false
# auth:
# enabled: true # Optional, default: false
# basic:
# - "user:pass" # Optional, default: []
# ignorePrefix:
# - "/rk/v1" # Optional, default: []
# apiKey:
# - "keys" # Optional, default: []
# meta:
# enabled: true # Optional, default: false
# prefix: "rk" # Optional, default: "rk"
# tracingTelemetry:
# enabled: true # Optional, default: false
# exporter: # Optional, default will create a stdout exporter
# file:
# enabled: true # Optional, default: false
# outputPath: "logs/trace.log" # Optional, default: stdout
# jaeger:
# agent:
# enabled: false # Optional, default: false
# host: "" # Optional, default: localhost
# port: 0 # Optional, default: 6831
# collector:
# enabled: true # Optional, default: false
# endpoint: "" # Optional, default: http://localhost:14268/api/traces
# username: "" # Optional, default: ""
# password: "" # Optional, default: ""
# rateLimit:
# enabled: false # Optional, default: false
# algorithm: "leakyBucket" # Optional, default: "tokenBucket"
# reqPerSec: 100 # Optional, default: 1000000
# paths:
# - path: "/rk/v1/healthy" # Optional, default: ""
# reqPerSec: 0 # Optional, default: 1000000
# jwt:
# enabled: true # Optional, default: false
# signingKey: "my-secret" # Required
# ignorePrefix: # Optional, default: []
# - "/rk/v1/tv"
# - "/sw"
# - "/rk/v1/assets"
# signingKeys: # Optional
# - "key:value"
# signingAlgo: "" # Optional, default: "HS256"
# tokenLookup: "header:<name>" # Optional, default: "header:Authorization"
# authScheme: "Bearer" # Optional, default: "Bearer"
# secure:
# enabled: true # Optional, default: false
# xssProtection: "" # Optional, default: "1; mode=block"
# contentTypeNosniff: "" # Optional, default: nosniff
# xFrameOptions: "" # Optional, default: SAMEORIGIN
# hstsMaxAge: 0 # Optional, default: 0
# hstsExcludeSubdomains: false # Optional, default: false
# hstsPreloadEnabled: false # Optional, default: false
# contentSecurityPolicy: "" # Optional, default: ""
# cspReportOnly: false # Optional, default: false
# referrerPolicy: "" # Optional, default: ""
# ignorePrefix: [] # Optional, default: []
# csrf:
# enabled: true
# tokenLength: 32 # Optional, default: 32
# tokenLookup: "header:X-CSRF-Token" # Optional, default: "header:X-CSRF-Token"
# cookieName: "_csrf" # Optional, default: _csrf
# cookieDomain: "" # Optional, default: ""
# cookiePath: "" # Optional, default: ""
# cookieMaxAge: 86400 # Optional, default: 86400
# cookieHttpOnly: false # Optional, default: false
# cookieSameSite: "default" # Optional, default: "default", options: lax, strict, none, default
# ignorePrefix: [] # Optional, default: []
复制代码