github.com/jmbataller/terraform@v0.6.8-0.20151125192640-b7a12e3a580c/builtin/providers/google/config.go (about)

     1  package google
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"log"
     7  	"net/http"
     8  	"runtime"
     9  	"strings"
    10  
    11  	"github.com/hashicorp/terraform/helper/pathorcontents"
    12  	"github.com/hashicorp/terraform/terraform"
    13  	"golang.org/x/oauth2"
    14  	"golang.org/x/oauth2/google"
    15  	"golang.org/x/oauth2/jwt"
    16  	"google.golang.org/api/compute/v1"
    17  	"google.golang.org/api/container/v1"
    18  	"google.golang.org/api/dns/v1"
    19  	"google.golang.org/api/sqladmin/v1beta4"
    20  	"google.golang.org/api/storage/v1"
    21  )
    22  
    23  // Config is the configuration structure used to instantiate the Google
    24  // provider.
    25  type Config struct {
    26  	Credentials string
    27  	Project     string
    28  	Region      string
    29  
    30  	clientCompute   *compute.Service
    31  	clientContainer *container.Service
    32  	clientDns       *dns.Service
    33  	clientStorage   *storage.Service
    34  	clientSqlAdmin  *sqladmin.Service
    35  }
    36  
    37  func (c *Config) loadAndValidate() error {
    38  	var account accountFile
    39  	clientScopes := []string{
    40  		"https://www.googleapis.com/auth/compute",
    41  		"https://www.googleapis.com/auth/cloud-platform",
    42  		"https://www.googleapis.com/auth/ndev.clouddns.readwrite",
    43  		"https://www.googleapis.com/auth/devstorage.full_control",
    44  	}
    45  
    46  	var client *http.Client
    47  
    48  	if c.Credentials != "" {
    49  		contents, _, err := pathorcontents.Read(c.Credentials)
    50  		if err != nil {
    51  			return fmt.Errorf("Error loading credentials: %s", err)
    52  		}
    53  
    54  		// Assume account_file is a JSON string
    55  		if err := parseJSON(&account, contents); err != nil {
    56  			return fmt.Errorf("Error parsing credentials '%s': %s", contents, err)
    57  		}
    58  
    59  		// Get the token for use in our requests
    60  		log.Printf("[INFO] Requesting Google token...")
    61  		log.Printf("[INFO]   -- Email: %s", account.ClientEmail)
    62  		log.Printf("[INFO]   -- Scopes: %s", clientScopes)
    63  		log.Printf("[INFO]   -- Private Key Length: %d", len(account.PrivateKey))
    64  
    65  		conf := jwt.Config{
    66  			Email:      account.ClientEmail,
    67  			PrivateKey: []byte(account.PrivateKey),
    68  			Scopes:     clientScopes,
    69  			TokenURL:   "https://accounts.google.com/o/oauth2/token",
    70  		}
    71  
    72  		// Initiate an http.Client. The following GET request will be
    73  		// authorized and authenticated on the behalf of
    74  		// your service account.
    75  		client = conf.Client(oauth2.NoContext)
    76  
    77  	} else {
    78  		log.Printf("[INFO] Authenticating using DefaultClient")
    79  		err := error(nil)
    80  		client, err = google.DefaultClient(oauth2.NoContext, clientScopes...)
    81  		if err != nil {
    82  			return err
    83  		}
    84  	}
    85  
    86  	versionString := terraform.Version
    87  	prerelease := terraform.VersionPrerelease
    88  	if len(prerelease) > 0 {
    89  		versionString = fmt.Sprintf("%s-%s", versionString, prerelease)
    90  	}
    91  	userAgent := fmt.Sprintf(
    92  		"(%s %s) Terraform/%s", runtime.GOOS, runtime.GOARCH, versionString)
    93  
    94  	var err error
    95  
    96  	log.Printf("[INFO] Instantiating GCE client...")
    97  	c.clientCompute, err = compute.New(client)
    98  	if err != nil {
    99  		return err
   100  	}
   101  	c.clientCompute.UserAgent = userAgent
   102  
   103  	log.Printf("[INFO] Instantiating GKE client...")
   104  	c.clientContainer, err = container.New(client)
   105  	if err != nil {
   106  		return err
   107  	}
   108  	c.clientContainer.UserAgent = userAgent
   109  
   110  	log.Printf("[INFO] Instantiating Google Cloud DNS client...")
   111  	c.clientDns, err = dns.New(client)
   112  	if err != nil {
   113  		return err
   114  	}
   115  	c.clientDns.UserAgent = userAgent
   116  
   117  	log.Printf("[INFO] Instantiating Google Storage Client...")
   118  	c.clientStorage, err = storage.New(client)
   119  	if err != nil {
   120  		return err
   121  	}
   122  	c.clientStorage.UserAgent = userAgent
   123  
   124  	log.Printf("[INFO] Instantiating Google SqlAdmin Client...")
   125  	c.clientSqlAdmin, err = sqladmin.New(client)
   126  	if err != nil {
   127  		return err
   128  	}
   129  	c.clientSqlAdmin.UserAgent = userAgent
   130  
   131  	return nil
   132  }
   133  
   134  // accountFile represents the structure of the account file JSON file.
   135  type accountFile struct {
   136  	PrivateKeyId string `json:"private_key_id"`
   137  	PrivateKey   string `json:"private_key"`
   138  	ClientEmail  string `json:"client_email"`
   139  	ClientId     string `json:"client_id"`
   140  }
   141  
   142  func parseJSON(result interface{}, contents string) error {
   143  	r := strings.NewReader(contents)
   144  	dec := json.NewDecoder(r)
   145  
   146  	return dec.Decode(result)
   147  }