terraform/builtin/providers/google/config.go

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package google
import (
"encoding/json"
"fmt"
"log"
"net/http"
"runtime"
"strings"
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"github.com/hashicorp/terraform/helper/pathorcontents"
"github.com/hashicorp/terraform/terraform"
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"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"golang.org/x/oauth2/jwt"
"google.golang.org/api/compute/v1"
"google.golang.org/api/container/v1"
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"google.golang.org/api/dns/v1"
"google.golang.org/api/sqladmin/v1beta4"
"google.golang.org/api/storage/v1"
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)
// Config is the configuration structure used to instantiate the Google
// provider.
type Config struct {
Credentials string
Project string
Region string
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clientCompute *compute.Service
clientContainer *container.Service
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clientDns *dns.Service
clientStorage *storage.Service
clientSqlAdmin *sqladmin.Service
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}
func (c *Config) loadAndValidate() error {
var account accountFile
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clientScopes := []string{
"https://www.googleapis.com/auth/compute",
"https://www.googleapis.com/auth/cloud-platform",
"https://www.googleapis.com/auth/ndev.clouddns.readwrite",
"https://www.googleapis.com/auth/devstorage.full_control",
}
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var client *http.Client
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if c.Credentials != "" {
contents, _, err := pathorcontents.Read(c.Credentials)
if err != nil {
return fmt.Errorf("Error loading credentials: %s", err)
}
// Assume account_file is a JSON string
if err := parseJSON(&account, contents); err != nil {
return fmt.Errorf("Error parsing credentials '%s': %s", contents, err)
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}
// Get the token for use in our requests
log.Printf("[INFO] Requesting Google token...")
log.Printf("[INFO] -- Email: %s", account.ClientEmail)
log.Printf("[INFO] -- Scopes: %s", clientScopes)
log.Printf("[INFO] -- Private Key Length: %d", len(account.PrivateKey))
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conf := jwt.Config{
Email: account.ClientEmail,
PrivateKey: []byte(account.PrivateKey),
Scopes: clientScopes,
TokenURL: "https://accounts.google.com/o/oauth2/token",
}
// Initiate an http.Client. The following GET request will be
// authorized and authenticated on the behalf of
// your service account.
client = conf.Client(oauth2.NoContext)
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} else {
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log.Printf("[INFO] Authenticating using DefaultClient")
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err := error(nil)
client, err = google.DefaultClient(oauth2.NoContext, clientScopes...)
if err != nil {
return err
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}
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}
versionString := terraform.Version
prerelease := terraform.VersionPrerelease
if len(prerelease) > 0 {
versionString = fmt.Sprintf("%s-%s", versionString, prerelease)
}
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userAgent := fmt.Sprintf(
"(%s %s) Terraform/%s", runtime.GOOS, runtime.GOARCH, versionString)
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var err error
log.Printf("[INFO] Instantiating GCE client...")
c.clientCompute, err = compute.New(client)
if err != nil {
return err
}
c.clientCompute.UserAgent = userAgent
log.Printf("[INFO] Instantiating GKE client...")
c.clientContainer, err = container.New(client)
if err != nil {
return err
}
c.clientContainer.UserAgent = userAgent
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log.Printf("[INFO] Instantiating Google Cloud DNS client...")
c.clientDns, err = dns.New(client)
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if err != nil {
return err
}
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c.clientDns.UserAgent = userAgent
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log.Printf("[INFO] Instantiating Google Storage Client...")
c.clientStorage, err = storage.New(client)
if err != nil {
return err
}
c.clientStorage.UserAgent = userAgent
log.Printf("[INFO] Instantiating Google SqlAdmin Client...")
c.clientSqlAdmin, err = sqladmin.New(client)
if err != nil {
return err
}
c.clientSqlAdmin.UserAgent = userAgent
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return nil
}
// accountFile represents the structure of the account file JSON file.
type accountFile struct {
PrivateKeyId string `json:"private_key_id"`
PrivateKey string `json:"private_key"`
ClientEmail string `json:"client_email"`
ClientId string `json:"client_id"`
}
func parseJSON(result interface{}, contents string) error {
r := strings.NewReader(contents)
dec := json.NewDecoder(r)
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return dec.Decode(result)
}