Universal Datera Config (Golang)

The Universal Datera Config (UDC) is a config that can be specified in a number of ways:

• JSON file with any of the following names: [.datera-config, datera-config, .datera-config.json, dateraconfig.json]
• The JSON file has the following configuration:

     {"mgmt_ip": "1.1.1.1",
      "username": "admin",
      "password": "password",
      "tenant": "/root",
      "api_version": "2.2",
      "ldap": ""}

• The file can be in any of the following places. This is also the lookup order for config files: current directory --> home directory --> home/config directory --> /etc/datera
• If no datera config file is found and a cinder.conf file is present, the config parser will try and pull connection credentials from the cinder.conf
• Instead of a JSON file, environment variables can be used.
  • DAT_MGMT
  • DAT_USER
  • DAT_PASS
  • DAT_TENANT
  • DAT_API
  • DAT_LDAP
• Most tools built to use the Datera Universal Config will also allow for providing/overriding any of the config values via command line flags.
  • -hostname
  • -username
  • -password
  • -tenant
  • -api-version
  • -ldap

Developing with Universal Datera Config

The Golang UDC is the following struct:

type UDC struct {
    Username   string `json:"username"`
    Password   string `json:"password"`
    MgmtIp     string `json:"mgmt_ip"`
    Tenant     string `json:"tenant"`
    ApiVersion string `json:"api_version"`
    Ldap       string `json:"ldap"`
}

To use UDC in a new python tool is very simple just add the following to your Go main package

import (
    udc "github.com/Datera/go-udc/pkg/udc"
)

func main() {
    conf, err := udc.GetConfig()
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Printf("Datera MgmtIp: %s\n", conf.MgmtIp)
}

If you can print the supported environment variables with the following:

import (
    udc "github.com/Datera/go-udc/pkg/udc"
)

func main() {
    udc.PrintEnvs()
}