github.com/turtlemonvh/terraform@v0.6.9-0.20151204001754-8e40b6b855e8/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  	"google.golang.org/api/pubsub/v1"
    22  )
    23  
    24  // Config is the configuration structure used to instantiate the Google
    25  // provider.
    26  type Config struct {
    27  	Credentials string
    28  	Project     string
    29  	Region      string
    30  
    31  	clientCompute   *compute.Service
    32  	clientContainer *container.Service
    33  	clientDns       *dns.Service
    34  	clientStorage   *storage.Service
    35  	clientSqlAdmin  *sqladmin.Service
    36  	clientPubsub	*pubsub.Service
    37  }
    38  
    39  func (c *Config) loadAndValidate() error {
    40  	var account accountFile
    41  	clientScopes := []string{
    42  		"https://www.googleapis.com/auth/compute",
    43  		"https://www.googleapis.com/auth/cloud-platform",
    44  		"https://www.googleapis.com/auth/ndev.clouddns.readwrite",
    45  		"https://www.googleapis.com/auth/devstorage.full_control",
    46  	}
    47  
    48  	var client *http.Client
    49  
    50  	if c.Credentials != "" {
    51  		contents, _, err := pathorcontents.Read(c.Credentials)
    52  		if err != nil {
    53  			return fmt.Errorf("Error loading credentials: %s", err)
    54  		}
    55  
    56  		// Assume account_file is a JSON string
    57  		if err := parseJSON(&account, contents); err != nil {
    58  			return fmt.Errorf("Error parsing credentials '%s': %s", contents, err)
    59  		}
    60  
    61  		// Get the token for use in our requests
    62  		log.Printf("[INFO] Requesting Google token...")
    63  		log.Printf("[INFO]   -- Email: %s", account.ClientEmail)
    64  		log.Printf("[INFO]   -- Scopes: %s", clientScopes)
    65  		log.Printf("[INFO]   -- Private Key Length: %d", len(account.PrivateKey))
    66  
    67  		conf := jwt.Config{
    68  			Email:      account.ClientEmail,
    69  			PrivateKey: []byte(account.PrivateKey),
    70  			Scopes:     clientScopes,
    71  			TokenURL:   "https://accounts.google.com/o/oauth2/token",
    72  		}
    73  
    74  		// Initiate an http.Client. The following GET request will be
    75  		// authorized and authenticated on the behalf of
    76  		// your service account.
    77  		client = conf.Client(oauth2.NoContext)
    78  
    79  	} else {
    80  		log.Printf("[INFO] Authenticating using DefaultClient")
    81  		err := error(nil)
    82  		client, err = google.DefaultClient(oauth2.NoContext, clientScopes...)
    83  		if err != nil {
    84  			return err
    85  		}
    86  	}
    87  
    88  	versionString := terraform.Version
    89  	prerelease := terraform.VersionPrerelease
    90  	if len(prerelease) > 0 {
    91  		versionString = fmt.Sprintf("%s-%s", versionString, prerelease)
    92  	}
    93  	userAgent := fmt.Sprintf(
    94  		"(%s %s) Terraform/%s", runtime.GOOS, runtime.GOARCH, versionString)
    95  
    96  	var err error
    97  
    98  	log.Printf("[INFO] Instantiating GCE client...")
    99  	c.clientCompute, err = compute.New(client)
   100  	if err != nil {
   101  		return err
   102  	}
   103  	c.clientCompute.UserAgent = userAgent
   104  
   105  	log.Printf("[INFO] Instantiating GKE client...")
   106  	c.clientContainer, err = container.New(client)
   107  	if err != nil {
   108  		return err
   109  	}
   110  	c.clientContainer.UserAgent = userAgent
   111  
   112  	log.Printf("[INFO] Instantiating Google Cloud DNS client...")
   113  	c.clientDns, err = dns.New(client)
   114  	if err != nil {
   115  		return err
   116  	}
   117  	c.clientDns.UserAgent = userAgent
   118  
   119  	log.Printf("[INFO] Instantiating Google Storage Client...")
   120  	c.clientStorage, err = storage.New(client)
   121  	if err != nil {
   122  		return err
   123  	}
   124  	c.clientStorage.UserAgent = userAgent
   125  
   126  	log.Printf("[INFO] Instantiating Google SqlAdmin Client...")
   127  	c.clientSqlAdmin, err = sqladmin.New(client)
   128  	if err != nil {
   129  		return err
   130  	}
   131  	c.clientSqlAdmin.UserAgent = userAgent
   132  
   133  	log.Printf("[INFO] Instatiating Google Pubsub Client...")
   134  	c.clientPubsub, err = pubsub.New(client)
   135  	if err != nil {
   136  		return err
   137  	}
   138  	c.clientPubsub.UserAgent = userAgent
   139  
   140  	return nil
   141  }
   142  
   143  // accountFile represents the structure of the account file JSON file.
   144  type accountFile struct {
   145  	PrivateKeyId string `json:"private_key_id"`
   146  	PrivateKey   string `json:"private_key"`
   147  	ClientEmail  string `json:"client_email"`
   148  	ClientId     string `json:"client_id"`
   149  }
   150  
   151  func parseJSON(result interface{}, contents string) error {
   152  	r := strings.NewReader(contents)
   153  	dec := json.NewDecoder(r)
   154  
   155  	return dec.Decode(result)
   156  }