go-vcloud-director

go-vcloud-director

This repo contains the go-vcloud-director package which implements an SDK for vCloud Director. The project serves the needs of Golang developers who need to integrate with vCloud Director. It is also the basis of the vCD Terraform Provider.

Contributions

Contributions to go-vcloud-director are gladly welcome and range from participating in community discussions to submitting pull requests. Please see the contributing guide for details on joining the community.

Install and Build

This project started using Go modules starting with version 2.1 and vendor directory is no longer bundled.

As per the modules documentation you no longer need to use GOPATH. You can clone the branch in any directory you like and go will fetch dependencies specified in the go.mod file:

cd ~/Documents/mycode
git clone https://github.com/vmware/go-vcloud-director.git
cd go-vcloud-director/govcd
go build

Note Do not forget to set GO111MODULE=on if you are in your GOPATH. Read more about this.

Example code

To show the SDK in action run the example:

mkdir ~/govcd_example
go mod init govcd_example
go get github.com/vmware/go-vcloud-director/v2@master
go build -o example
./example user_name "password" org_name vcd_IP vdc_name 

Here's the code:

package main

import (
	"fmt"
	"net/url"
	"os"

	"github.com/vmware/go-vcloud-director/v2/govcd"
)

type Config struct {
	User     string
	Password string
	Org      string
	Href     string
	VDC      string
	Insecure bool
}

func (c *Config) Client() (*govcd.VCDClient, error) {
	u, err := url.ParseRequestURI(c.Href)
	if err != nil {
		return nil, fmt.Errorf("unable to pass url: %s", err)
	}

	vcdclient := govcd.NewVCDClient(*u, c.Insecure)
	err = vcdclient.Authenticate(c.User, c.Password, c.Org)
	if err != nil {
		return nil, fmt.Errorf("unable to authenticate: %s", err)
	}
	return vcdclient, nil
}

func main() {
	if len(os.Args) < 6 {
		fmt.Println("Syntax: example user password org VCD_IP VDC ")
		os.Exit(1)
	}
	config := Config{
		User:     os.Args[1],
		Password: os.Args[2],
		Org:      os.Args[3],
		Href:     fmt.Sprintf("https://%s/api", os.Args[4]),
		VDC:      os.Args[5],
		Insecure: true,
	}

	client, err := config.Client() // We now have a client
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	org, err := client.GetOrgByName(config.Org)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	vdc, err := org.GetVDCByName(config.VDC, false)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("Org URL: %s\n", org.Org.HREF)
	fmt.Printf("VDC URL: %s\n", vdc.Vdc.HREF)
}

Authentication

You can authenticate to the vCD in four ways:

• With a System Administration user and password (administrator@system)
• With an Organization user and password (tenant-admin@org-name)

For the above two methods, you use:

	err := vcdClient.Authenticate(User, Password, Org)
	// or
	resp, err := vcdClient.GetAuthResponse(User, Password, Org)

• With an authorization token

	err := vcdClient.SetToken(Org, govcd.AuthorizationHeader, Token)

The file scripts/get_token.sh provides a handy method of extracting the token (x-vcloud-authorization value) for future use.

• SAML user and password (works with ADFS as IdP using WS-TRUST endpoint "/adfs/services/trust/13/usernamemixed"). One must pass govcd.WithSamlAdfs(true,customAdfsRptId) and username must be formatted so that ADFS understands it ('user@contoso.com' or 'contoso.com\user') You can find usage example in samples/saml_auth_adfs.

vcdCli := govcd.NewVCDClient(*vcdURL, true, govcd.WithSamlAdfs(true, customAdfsRptId))
err = vcdCli.Authenticate(username, password, org)

More information about inner workings of SAML auth flow in this codebase can be found in saml_auth.go:authorizeSamlAdfs(...). Additionaly this flow is documented in vCD documentation.