Inject middlewares & server configuration of gin-gonic/gin from YAML file.
This belongs to rk-boot family. We suggest use this lib with rk-boot.
In the bellow example, we will start microservice with bellow functionality and middlewares enabled via YAML.
- gin-gonic/gin server
- Swagger UI
- Docs
- CommonService
- Prometheus Metrics (middleware)
- Logging (middleware)
- Meta (middleware)
Please refer example at example/boot/simple.
go get github.com/rookie-ninja/rk-gin/v2show
---
gin:
- name: greeter # Required
port: 8080 # Required
enabled: true # Required
commonService: # Optional
enabled: true # Optional, default: false
sw: # Optional
enabled: true # Optional, default: false
docs: # Optional
enabled: true # Optional, default: false
prom:
enabled: true # Optional, default: false
middleware:
logging:
enabled: true
prom:
enabled: true
meta:
enabled: trueshow
// 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"
"embed"
_ "embed"
"fmt"
"github.com/gin-gonic/gin"
"github.com/rookie-ninja/rk-entry/v2/entry"
"github.com/rookie-ninja/rk-gin/v2/boot"
"net/http"
)
// How to use embed.FS for:
//
// - boot.yaml
// - rkentry.DocsEntryType
// - rkentry.SWEntryType
// - rkentry.StaticFileHandlerEntryType
// - rkentry.CertEntry
//
// If we use embed.FS, then we only need one single binary file while packing.
// We suggest use embed.FS to pack swagger local file since rk-entry would use os.Getwd() to look for files
// if relative path was provided.
//
//go:embed docs
var docsFS embed.FS
func init() {
rkentry.GlobalAppCtx.AddEmbedFS(rkentry.SWEntryType, "greeter", &docsFS)
}
//go:embed boot.yaml
var boot []byte
// @title RK Swagger for Gin
// @version 1.0
// @description This is a greeter service with rk-boot.
func main() {
// Bootstrap preload entries
rkentry.BootstrapPreloadEntryYAML(boot)
// Bootstrap gin entry from boot config
res := rkgin.RegisterGinEntryYAML(boot)
// Get GinEntry
ginEntry := res["greeter"].(*rkgin.GinEntry)
ginEntry.Router.GET("/v1/greeter", Greeter)
// Bootstrap gin entry
ginEntry.Bootstrap(context.Background())
// Wait for shutdown signal
rkentry.GlobalAppCtx.WaitForShutdownSig()
// Interrupt gin entry
ginEntry.Interrupt(context.Background())
}
// Greeter handler
// @Summary Greeter service
// @Id 1
// @version 1.0
// @produce application/json
// @Param name query string true "Input name"
// @Success 200 {object} GreeterResponse
// @Router /v1/greeter [get]
func Greeter(ctx *gin.Context) {
ctx.JSON(http.StatusOK, &GreeterResponse{
Message: fmt.Sprintf("Hello %s!", ctx.Query("name")),
})
}
type GreeterResponse struct {
Message string
}$ go run main.goshow
Try to test Gin Service with curl
# Curl to common service
$ curl localhost:8080/rk/v1/ready
{
"ready": true
}
$ curl localhost:8080/rk/v1/alive
{
"alive": true
}Please refer sw section at Full YAML.
By default, we could access swagger UI at http://localhost:8080/sw
Please refer docs section at Full YAML.
By default, we could access docs UI at http://localhost:8080/docs
Please refer middleware.prom section at Full YAML.
By default, we could access prometheus client at http://localhost:8080/metrics
Please refer middleware.logging section at Full YAML.
By default, we enable zap logger and event logger with encoding type of [console]. Encoding type of [json] and [flatten] is also supported.
2021-12-28T02:14:48.303+0800 INFO boot/gin_entry.go:920 Bootstrap ginEntry {"eventId": "65b03dbc-c10e-4998-8d49-26775dafc78b", "entryName": "greeter"}
------------------------------------------------------------------------
endTime=2021-12-28T02:14:48.305036+08:00
startTime=2021-12-28T02:14:48.30306+08:00
elapsedNano=1977443
timezone=CST
ids={"eventId":"65b03dbc-c10e-4998-8d49-26775dafc78b"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GinEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"commonServiceEnabled":true,"commonServicePathPrefix":"/rk/v1/","entryName":"greeter","entryPort":8080,"entryType":"GinEntry","promEnabled":true,"promPath":"/metrics","promPort":8080,"swEnabled":true,"swPath":"/sw/","tvEnabled":true,"tvPath":"/rk/v1/tv/"}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost
operation=Bootstrap
resCode=OK
eventStatus=Ended
EOEPlease refer meta section at Full YAML.
By default, we will send back some metadata to client including gateway with headers.
$ curl -vs localhost:8080/rk/v1/ready
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /rk/v1/healthy HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.64.1
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=utf-8
< X-Request-Id: f3f0212e-5d99-4851-ae79-ea88818f0ed6
< X-Rk-App-Name: rk
< X-Rk-App-Unix-Time: 2021-12-28T02:20:48.207716+08:00
< X-Rk-Received-Time: 2021-12-28T02:20:48.207716+08:00
< Date: Mon, 27 Dec 2021 18:20:48 GMT
< Content-Length: 16
<
* Connection #0 to host localhost left intact
{"ready":true}We registered /v1/greeter API in gin-gonic/gin server and let's validate it!
$ curl -vs "localhost:8080/v1/greeter?name=rk-dev"
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8080 (#0)
> GET /v1/greeter?name=rk-dev HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.64.1
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=utf-8
< X-Request-Id: a96ab531-e28f-47ca-a082-fc3f8ef14187
< X-Rk-App-Name: rk
< X-Rk-App-Unix-Time: 2021-12-28T02:22:03.289469+08:00
< X-Rk-Received-Time: 2021-12-28T02:22:03.289469+08:00
< Date: Mon, 27 Dec 2021 18:22:03 GMT
< Content-Length: 27
<
* Connection #0 to host localhost left intact
{"Message":"Hello rk-dev!"}Bellow logs would be printed in stdout.
------------------------------------------------------------------------
endTime=2021-12-28T02:22:03.289585+08:00
startTime=2021-12-28T02:22:03.289457+08:00
elapsedNano=128210
timezone=CST
ids={"eventId":"a96ab531-e28f-47ca-a082-fc3f8ef14187","requestId":"a96ab531-e28f-47ca-a082-fc3f8ef14187"}
app={"appName":"rk","appVersion":"","entryName":"greeter","entryType":"GinEntry"}
env={"arch":"amd64","az":"*","domain":"*","hostname":"lark.local","localIP":"10.8.0.2","os":"darwin","realm":"*","region":"*"}
payloads={"apiMethod":"GET","apiPath":"/v1/greeter","apiProtocol":"HTTP/1.1","apiQuery":"name=rk-dev","userAgent":"curl/7.64.1"}
error={}
counters={}
pairs={}
timing={}
remoteAddr=localhost:54028
operation=/v1/greeter
resCode=200
eventStatus=Ended
EOE
Prometheus client will automatically register into gin-gonic/gin instance at /metrics.
Access http://localhost:8080/metrics
User can enable anyone of those as needed! No mandatory binding!
| Instance | Description |
|---|---|
| gin.Router | Compatible with original gin-gonic/gin service functionalities |
| Config | Configure spf13/viper as config instance and reference it from YAML |
| Logger | Configure uber-go/zap logger configuration and reference it from YAML |
| Event | Configure logging of RPC with rk-query and reference it from YAML |
| Cert | Fetch TLS/SSL certificates start microservice. |
| Prometheus | Start prometheus client at client side and push metrics to pushgateway as needed. |
| Swagger | Builtin swagger UI handler. |
| Docs | Builtin RapiDoc instance which can be used to replace swagger and RK TV. |
| CommonService | List of common APIs. |
| StaticFileHandler | A Web UI shows files could be downloaded from server, currently support source of local and embed.FS. |
| PProf | PProf web UI. |
All middlewares could be configured via YAML or Code.
User can enable anyone of those as needed! No mandatory binding!
| Middleware | Description |
|---|---|
| Prom | Collect RPC metrics and export to prometheus client. |
| Logging | Log every RPC requests as event with rk-query. |
| Trace | Collect RPC trace and export it to stdout, file or jaeger with open-telemetry/opentelemetry-go. |
| Panic | Recover from panic for RPC requests and log it. |
| Meta | Send micsro service metadata as header to client. |
| Auth | Support [Basic Auth] and [API Key] authorization types. |
| RateLimit | Limiting RPC rate globally or per path. |
| Timeout | Timing out request by configuration. |
| Gzip | Compress and Decompress message body based on request header with gzip format . |
| CORS | Server side CORS validation. |
| JWT | Server side JWT validation. |
| Secure | Server side secure validation. |
| CSRF | Server side csrf validation. |
User can start multiple gin-gonic/gin instances at the same time. Please make sure use different port and name.
show
---
#app:
# name: my-app # Optional, default: "rk-app"
# version: "v1.0.0" # Optional, default: "v0.0.0"
# description: "this is description" # Optional, default: ""
# keywords: ["rk", "golang"] # Optional, default: []
# homeUrl: "http://example.com" # Optional, default: ""
# docsUrl: ["http://example.com"] # Optional, default: []
# maintainers: ["rk-dev"] # Optional, default: []
#logger:
# - name: my-logger # Required
# description: "Description of entry" # Optional
# domain: "*" # Optional, default: "*"
# default: false # Optional, default: false, use as default logger entry
# zap: # Optional
# level: info # Optional, default: info
# development: true # Optional, default: true
# disableCaller: false # Optional, default: false
# disableStacktrace: true # Optional, default: true
# encoding: console # Optional, default: console
# outputPaths: ["stdout"] # Optional, default: [stdout]
# errorOutputPaths: ["stderr"] # Optional, default: [stderr]
# encoderConfig: # Optional
# timeKey: "ts" # Optional, default: ts
# levelKey: "level" # Optional, default: level
# nameKey: "logger" # Optional, default: logger
# callerKey: "caller" # Optional, default: caller
# messageKey: "msg" # Optional, default: msg
# stacktraceKey: "stacktrace" # Optional, default: stacktrace
# skipLineEnding: false # Optional, default: false
# lineEnding: "\n" # Optional, default: \n
# consoleSeparator: "\t" # Optional, default: \t
# sampling: # Optional, default: nil
# initial: 0 # Optional, default: 0
# thereafter: 0 # Optional, default: 0
# initialFields: # Optional, default: empty map
# key: value
# lumberjack: # Optional, default: nil
# filename:
# maxsize: 1024 # Optional, suggested: 1024 (MB)
# maxage: 7 # Optional, suggested: 7 (day)
# maxbackups: 3 # Optional, suggested: 3 (day)
# localtime: true # Optional, suggested: true
# compress: true # Optional, suggested: true
# loki:
# enabled: true # Optional, default: false
# addr: localhost:3100 # Optional, default: localhost:3100
# path: /loki/api/v1/push # Optional, default: /loki/api/v1/push
# username: "" # Optional, default: ""
# password: "" # Optional, default: ""
# maxBatchWaitMs: 3000 # Optional, default: 3000
# maxBatchSize: 1000 # Optional, default: 1000
# insecureSkipVerify: false # Optional, default: false
# labels: # Optional, default: empty map
# my_label_key: my_label_value
#event:
# - name: my-event # Required
# description: "Description of entry" # Optional
# domain: "*" # Optional, default: "*"
# default: false # Optional, default: false, use as default event entry
# encoding: console # Optional, default: console
# outputPaths: ["stdout"] # Optional, default: [stdout]
# lumberjack: # Optional, default: nil
# filename:
# maxsize: 1024 # Optional, suggested: 1024 (MB)
# maxage: 7 # Optional, suggested: 7 (day)
# maxbackups: 3 # Optional, suggested: 3 (day)
# localtime: true # Optional, suggested: true
# compress: true # Optional, suggested: true
# loki:
# enabled: true # Optional, default: false
# addr: localhost:3100 # Optional, default: localhost:3100
# path: /loki/api/v1/push # Optional, default: /loki/api/v1/push
# username: "" # Optional, default: ""
# password: "" # Optional, default: ""
# maxBatchWaitMs: 3000 # Optional, default: 3000
# maxBatchSize: 1000 # Optional, default: 1000
# insecureSkipVerify: false # Optional, default: false
# labels: # Optional, default: empty map
# my_label_key: my_label_value
#cert:
# - name: my-cert # Required
# description: "Description of entry" # Optional, default: ""
# domain: "*" # Optional, default: "*"
# caPath: "certs/ca.pem" # Optional, default: ""
# certPemPath: "certs/server-cert.pem" # Optional, default: ""
# keyPemPath: "certs/server-key.pem" # Optional, default: ""
#config:
# - name: my-config # Required
# description: "Description of entry" # Optional, default: ""
# domain: "*" # Optional, default: "*"
# path: "config/config.yaml" # Optional
# envPrefix: "" # Optional, default: ""
# content: # Optional, defualt: empty map
# key: value
gin:
- name: greeter # Required
port: 8080 # Required
enabled: true # Required
# description: "greeter server" # Optional, default: ""
# certEntry: my-cert # Optional, default: "", reference of cert entry declared above
# loggerEntry: my-logger # Optional, default: "", reference of cert entry declared above, STDOUT will be used if missing
# eventEntry: my-event # Optional, default: "", reference of cert entry declared above, STDOUT will be used if missing
# sw:
# enabled: true # Optional, default: false
# path: "sw" # Optional, default: "sw"
# jsonPath: [""] # Optional
# headers: ["sw:rk"] # Optional, default: []
# docs:
# enabled: true # Optional, default: false
# path: "docs" # Optional, default: "docs"
# specPath: "" # Optional
# headers: ["sw:rk"] # Optional, default: []
# style: # Optional
# theme: "light" # Optional, default: "light"
# debug: false # Optional, default: false
# commonService:
# enabled: true # Optional, default: false
# pathPrefix: "" # Optional, default: "/rk/v1/"
# static:
# enabled: true # Optional, default: false
# path: "/static" # Optional, default: /static
# sourceType: local # Optional, options: local, embed.FS can be used either, need to specify in code
# sourcePath: "." # Optional, full path of source directory
# pprof:
# enabled: true # Optional, default: false
# path: "/pprof" # Optional, default: /pprof
# 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
# certEntry: my-cert # Optional, default: "", reference of cert entry declared above
# middleware:
# ignore: [""] # Optional, default: []
# errorModel: google # Optional, default: google, [amazon, google] are supported options
# logging:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# loggerEncoding: "console" # Optional, default: "console"
# loggerOutputPaths: ["logs/app.log"] # Optional, default: ["stdout"]
# eventEncoding: "console" # Optional, default: "console"
# eventOutputPaths: ["logs/event.log"] # Optional, default: ["stdout"]
# prom:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# auth:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# basic:
# - "user:pass" # Optional, default: []
# apiKey:
# - "keys" # Optional, default: []
# meta:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# prefix: "rk" # Optional, default: "rk"
# trace:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# 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
# ignore: [""] # Optional, default: []
# algorithm: "leakyBucket" # Optional, default: "tokenBucket"
# reqPerSec: 100 # Optional, default: 1000000
# paths:
# - path: "/rk/v1/healthy" # Optional, default: ""
# reqPerSec: 0 # Optional, default: 1000000
# timeout:
# enabled: false # Optional, default: false
# ignore: [""] # Optional, default: []
# timeoutMs: 5000 # Optional, default: 5000
# paths:
# - path: "/rk/v1/healthy" # Optional, default: ""
# timeoutMs: 1000 # Optional, default: 5000
# jwt:
# enabled: true # Optional, default: false
# ignore: [ "" ] # Optional, default: []
# signerEntry: "" # Optional, default: ""
# skipVerify: false # Optional, default: false
# symmetric: # Optional
# algorithm: "" # Required, default: ""
# token: "" # Optional, default: ""
# tokenPath: "" # Optional, default: ""
# asymmetric: # Optional
# algorithm: "" # Required, default: ""
# privateKey: "" # Optional, default: ""
# privateKeyPath: "" # Optional, default: ""
# publicKey: "" # Optional, default: ""
# publicKeyPath: "" # Optional, default: ""
# tokenLookup: "header:<name>" # Optional, default: "header:Authorization"
# authScheme: "Bearer" # Optional, default: "Bearer"
# secure:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# 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: ""
# csrf:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# 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
# gzip:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# level: bestSpeed # Optional, options: [noCompression, bestSpeed， bestCompression, defaultCompression, huffmanOnly]
# cors:
# enabled: true # Optional, default: false
# ignore: [""] # Optional, default: []
# allowOrigins: # Optional, default: []
# - "http://localhost:*" # Optional, default: *
# allowCredentials: false # Optional, default: false
# allowHeaders: [] # Optional, default: []
# allowMethods: [] # Optional, default: []
# exposeHeaders: [] # Optional, default: []
# maxAge: 0 # Optional, default: 0Simply run make all to validate your changes. Or run codes in example/ folder.
- make all
If files in boot/assets have been modified, then we need to run it.
Run unit test with make test command.
github workflow will automatically run unit test and golangci-lint for testing and lint validation.
We encourage and support an active, healthy community of contributors — including you! Details are in the contribution guide and the code of conduct. The rk maintainers keep an eye on issues and pull requests, but you can also report any negative conduct to lark@rkdev.info.
Released under the Apache 2.0 License.