packer-cn/builder/openstack/access_config.go

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package openstack
import (
"crypto/tls"
"fmt"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"github.com/rackspace/gophercloud"
"net/http"
"net/url"
"os"
"strings"
)
// AccessConfig is for common configuration related to openstack access
type AccessConfig struct {
Username string `mapstructure:"username"`
Password string `mapstructure:"password"`
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ApiKey string `mapstructure:"api_key"`
Project string `mapstructure:"project"`
Provider string `mapstructure:"provider"`
RawRegion string `mapstructure:"region"`
ProxyUrl string `mapstructure:"proxy_url"`
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TenantId string `mapstructure:"tenant_id"`
Insecure bool `mapstructure:"insecure"`
}
// Auth returns a valid Auth object for access to openstack services, or
// an error if the authentication couldn't be resolved.
func (c *AccessConfig) Auth() (gophercloud.AccessProvider, error) {
c.Username = common.ChooseString(c.Username, os.Getenv("SDK_USERNAME"), os.Getenv("OS_USERNAME"))
c.Password = common.ChooseString(c.Password, os.Getenv("SDK_PASSWORD"), os.Getenv("OS_PASSWORD"))
c.ApiKey = common.ChooseString(c.ApiKey, os.Getenv("SDK_API_KEY"))
c.Project = common.ChooseString(c.Project, os.Getenv("SDK_PROJECT"), os.Getenv("OS_TENANT_NAME"))
c.Provider = common.ChooseString(c.Provider, os.Getenv("SDK_PROVIDER"), os.Getenv("OS_AUTH_URL"))
c.RawRegion = common.ChooseString(c.RawRegion, os.Getenv("SDK_REGION"), os.Getenv("OS_REGION_NAME"))
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c.TenantId = common.ChooseString(c.TenantId, os.Getenv("OS_TENANT_ID"))
// OpenStack's auto-generated openrc.sh files do not append the suffix
// /tokens to the authentication URL. This ensures it is present when
// specifying the URL.
if strings.Contains(c.Provider, "://") && !strings.HasSuffix(c.Provider, "/tokens") {
c.Provider += "/tokens"
}
authoptions := gophercloud.AuthOptions{
AllowReauth: true,
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ApiKey: c.ApiKey,
TenantId: c.TenantId,
TenantName: c.Project,
Username: c.Username,
Password: c.Password,
}
default_transport := &http.Transport{}
if c.Insecure {
cfg := new(tls.Config)
cfg.InsecureSkipVerify = true
default_transport.TLSClientConfig = cfg
}
// For corporate networks it may be the case where we want our API calls
// to be sent through a separate HTTP proxy than external traffic.
if c.ProxyUrl != "" {
url, err := url.Parse(c.ProxyUrl)
if err != nil {
return nil, err
}
// The gophercloud.Context has a UseCustomClient method which
// would allow us to override with a new instance of http.Client.
default_transport.Proxy = http.ProxyURL(url)
}
if c.Insecure || c.ProxyUrl != "" {
http.DefaultTransport = default_transport
}
return gophercloud.Authenticate(c.Provider, authoptions)
}
func (c *AccessConfig) Region() string {
return common.ChooseString(c.RawRegion, os.Getenv("SDK_REGION"), os.Getenv("OS_REGION_NAME"))
}
func (c *AccessConfig) Prepare(t *packer.ConfigTemplate) []error {
if t == nil {
var err error
t, err = packer.NewConfigTemplate()
if err != nil {
return []error{err}
}
}
templates := map[string]*string{
"username": &c.Username,
"password": &c.Password,
"api_key": &c.ApiKey,
"provider": &c.Provider,
"project": &c.Project,
"tenant_id": &c.TenantId,
"region": &c.RawRegion,
"proxy_url": &c.ProxyUrl,
}
errs := make([]error, 0)
for n, ptr := range templates {
var err error
*ptr, err = t.Process(*ptr, nil)
if err != nil {
errs = append(
errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
if strings.HasPrefix(c.Provider, "rackspace") {
if c.Region() == "" {
errs = append(errs, fmt.Errorf("region must be specified when using rackspace"))
}
}
if len(errs) > 0 {
return errs
}
return nil
}