Config

Read config from local file system.

Overview

rk-boot uses viper as config reader.

Bellow file types are supported by Viper:

• JSON
• TOML
• YAML
• HCL
• envfile
• Java propertie

DOMAIN

Environment variable of DOMAIN can be used to distinguish environment.

Quick start

1.Install

$ go get github.com/rookie-ninja/rk-boot/v2
$ go get github.com/rookie-ninja/rk-zero

2.Create config/default.yaml

---
value: default

3.Create boot.yaml

---
config:
  - name: my-config
    path: "config/default.yaml"
zero:
  - name: greeter
    port: 8080
    enabled: true

4.Create main.go

package main

import (
  "context"
  "fmt"
  "github.com/rookie-ninja/rk-boot/v2"
  "github.com/rookie-ninja/rk-entry/v2/entry"
  "net/http"
)

func main() {
  // Create a new boot instance.
  boot := rkboot.NewBoot()

  // Read config
  fmt.Println(rkentry.GlobalAppCtx.GetConfigEntry("my-config").GetString("value"))

  // Bootstrap
  boot.Bootstrap(context.TODO())

  boot.WaitForShutdownSig(context.TODO())
}

5.Validate

$ go run main.go
default
...

Cheers

Set config values in boot.yaml

1.Create boot.yaml

config:
  - name: my-config
    content:
      value: embed-value
zero:
  - name: greeter
    port: 8080
    enabled: true

2.Validate

$ go run main.go
embed-value
...

Cheers

Override with environment variable

1.Create boot.yaml

config:
  - name: my-config
    envPrefix: "demo"
    path: "config/default.yaml"
zero:
  - name: greeter
    port: 8080
    enabled: true

2.Override

package main

import (
  "context"
  "fmt"
  "github.com/rookie-ninja/rk-boot/v2"
  "github.com/rookie-ninja/rk-entry/v2/entry"
  "net/http"
  "os"
)

func main() {
  // Use upper case env prefix
  os.Setenv("DEMO_VALUE", "override-value")

  // Create a new boot instance.
  boot := rkboot.NewBoot()

  fmt.Println(rkentry.GlobalAppCtx.GetConfigEntry("my-config").GetString("value"))

  // Bootstrap
  boot.Bootstrap(context.TODO())

  boot.WaitForShutdownSig(context.TODO())
}

3.Validate

$ go run main.go
override-value
...

Cheers