Configuration File

Overview

Normally started with a static configuration file to load configurations. The go-zero configuration currently supports various formats. This chapter will demonstrate how go-zero will load static configurations.

Task Targets

1. Learn how to define a configuration.
2. Load configuration from static file.

Preparing

1. Complete golang installation

Define Config

type Config struct {
    Name string
    Host string `json:",default=0.0.0.0"`
    Port int
}

As above, we defined a Config struct, which contains several fields, service name, listener addresses, port number.

Define configuration path

var f = flag.String("f", "config.yaml", "config file")

We generally want to specify the path to the configuration file at startup, so we have a flag path to accept the configuration file.

Write configuration

We use yaml as an instance to generate config.yaml files.Write the following

Name: demo
Host: 127.0.0.1
Port: 6370

Load Configuration

flag.Parse()
var c Config
conf.MustLoad(*f, &c)
println(c.Name)

Here the configuration file in config.yaml is loaded into Config file.We can then use our configuration variable in the program

Full Instance

package main
import (
    "flag"
    "github.com/zeromicro/go-zero/core/conf"
)
type Config struct {
    Name string
    Host string `json:",default=0.0.0.0"`
    Port int
}
var f = flag.String("f", "config.yaml", "config file")
func main() {
    flag.Parse()
    var c Config
    conf.MustLoad(*f, &c)
    println(c.Name)
}