introduce

In a complete example, turning on TLS/SSL in the Gin framework is what we call https.

We will use rk-boot To start the microservice for the Gin Framework.

Visit the following address for the complete tutorial:

• https://rkdocs.netlify.app/cn

Generate Self-Signed Certificate

Users can purchase certificates from major cloud vendors or use them cfssl Create a custom certificate.

We describe how to generate certificates locally.

1. Download cfssl & cfssljson command line

The rk command line is recommended for download.

$ go get -u github.com/rookie-ninja/rk/cmd/rk
$ rk install cfssl
$ rk install cfssljson

Official Download

$ go get github.com/cloudflare/cfssl/cmd/cfssl
$ go get github.com/cloudflare/cfssl/cmd/cfssljson

2. Generate CA

$ cfssl print-defaults config > ca-config.json
$ cfssl print-defaults csr > ca-csr.json

Modify ca-config.json and ca-csr.json as needed.

$ cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

3. Generate service-side certificates

server.csr, server.pem, and server-key.pem will be generated.

$ cfssl gencert -config ca-config.json -ca ca.pem -ca-key ca-key.pem -profile www ca-csr.json | cfssljson -bare server

install

go get github.com/rookie-ninja/rk-boot

Quick Start

rk-boot Gin Services are supported to obtain certificates in the following ways.

• Local File System
• Remote File System
• Consul
• ETCD

Let's first see how to get a certificate locally and start it.

1. Create boot.yaml

In this example, we only start the server-side certificate. locale is used to distinguish certs in different environments.

Refer to previous articles for details:

---
cert:
  - name: "local-cert"                     # Required
    provider: "localFs"                    # Required, etcd, consul, localFs, remoteFs are supported options
    locale: "*::*::*::*"                   # Required, default: ""
    serverCertPath: "cert/server.pem"      # Optional, default: "", path of certificate on local FS
    serverKeyPath: "cert/server-key.pem"   # Optional, default: "", path of certificate on local FS
gin:
  - name: greeter
    port: 8080
    enabled: true
    enableReflection: true
    cert:
      ref: "local-cert"                    # Enable gin TLS
    commonService:
      enabled: true

2. Create main.go

package main

import (
	"context"
	"github.com/rookie-ninja/rk-boot"
)

// 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())
}

3. Folder structure

.
├── boot.yaml
├── cert
│   ├── server-key.pem
│   └── server.pem
├── go.mod
├── go.sum
└── main.go

1 directory, 6 files

4. Start main.go

$ go run main.go

5. Validation

$ curl -X GET --insecure https://localhost:8080/rk/v1/healthy                 
{"healthy":true}

Framework

Parameter introduction

1. Read certificates locally

• Example

---
cert:
  - name: "local-cert"                     # Required
    description: "Description of entry"    # Optional
    provider: "localFs"                    # Required, etcd, consul, localFs, remoteFs are supported options
    locale: "*::*::*::*"                   # Required, default: ""
    serverCertPath: "cert/server.pem"      # Optional, default: "", path of certificate on local FS
    serverKeyPath: "cert/server-key.pem"   # Optional, default: "", path of certificate on local FS
gin:
  - name: greeter
    port: 8080
    enabled: true
    enableReflection: true
    cert:
      ref: "local-cert"                    # Enable gin TLS

2. Read certificates from remote file service

• Example

---
cert:
  - name: "remote-cert"                    # Required
    description: "Description of entry"    # Optional
    provider: "remoteFs"                   # Required, etcd, consul, localFs, remoteFs are supported options
    endpoint: "localhost:8081"             # Required, both http://x.x.x.x or x.x.x.x are acceptable
    locale: "*::*::*::*"                   # Required, default: ""
    serverCertPath: "cert/server.pem"      # Optional, default: "", path of certificate on local FS
    serverKeyPath: "cert/server-key.pem"   # Optional, default: "", path of certificate on local FS
gin:
  - name: greeter
    port: 8080
    enabled: true
    cert:
      ref: "remote-cert"                   # Enable gin TLS

3. Read certificates from Consul

• Example

---
cert:
  - name: "consul-cert"                    # Required
    provider: "consul"                     # Required, etcd, consul, localFS, remoteFs are supported options
    description: "Description of entry"    # Optional
    locale: "*::*::*::*"                   # Required, ""
    endpoint: "localhost:8500"             # Required, http://x.x.x.x or x.x.x.x both acceptable.
    datacenter: "dc1"                      # Optional, default: "", consul datacenter
    serverCertPath: "server.pem"           # Optional, default: "", key of value in consul
    serverKeyPath: "server-key.pem"        # Optional, default: "", key of value in consul
gin:
  - name: greeter
    port: 8080
    enabled: true
    cert:
      ref: "consul-cert"                   # Enable gin TLS

4. Read certificates from ETCD

• Example

---
cert:
  - name: "etcd-cert"                      # Required
    description: "Description of entry"    # Optional
    provider: "etcd"                       # Required, etcd, consul, localFs, remoteFs are supported options
    locale: "*::*::*::*"                   # Required, default: ""
    endpoint: "localhost:2379"             # Required, http://x.x.x.x or x.x.x.x both acceptable.
    serverCertPath: "server.pem"           # Optional, default: "", key of value in etcd
    serverKeyPath: "server-key.pem"        # Optional, default: "", key of value in etcd
gin:
  - name: greeter
    port: 8080
    enabled: true
    cert:
      ref: "etcd-cert"                   # Enable gin TLS