109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
package openstack
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import (
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"fmt"
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"github.com/mitchellh/packer/packer"
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"github.com/rackspace/gophercloud"
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"net/http"
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"net/url"
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"os"
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)
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// AccessConfig is for common configuration related to openstack access
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type AccessConfig struct {
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Username string `mapstructure:"username"`
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Password string `mapstructure:"password"`
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Project string `mapstructure:"project"`
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Provider string `mapstructure:"provider"`
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RawRegion string `mapstructure:"region"`
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ProxyUrl string `mapstructure:"proxy_url"`
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}
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// Auth returns a valid Auth object for access to openstack services, or
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// an error if the authentication couldn't be resolved.
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func (c *AccessConfig) Auth() (gophercloud.AccessProvider, error) {
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username := c.Username
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password := c.Password
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project := c.Project
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provider := c.Provider
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proxy := c.ProxyUrl
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if username == "" {
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username = os.Getenv("SDK_USERNAME")
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}
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if password == "" {
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password = os.Getenv("SDK_PASSWORD")
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}
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if project == "" {
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project = os.Getenv("SDK_PROJECT")
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}
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if provider == "" {
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provider = os.Getenv("SDK_PROVIDER")
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}
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authoptions := gophercloud.AuthOptions{
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Username: username,
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Password: password,
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AllowReauth: true,
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}
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if project != "" {
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authoptions.TenantName = project
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}
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// For corporate networks it may be the case where we want our API calls
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// to be sent through a separate HTTP proxy than external traffic.
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if proxy != "" {
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url, err := url.Parse(proxy)
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if err != nil {
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return nil, err
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}
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// The gophercloud.Context has a UseCustomClient method which
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// would allow us to override with a new instance of http.Client.
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http.DefaultTransport = &http.Transport{Proxy: http.ProxyURL(url)}
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}
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return gophercloud.Authenticate(provider, authoptions)
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}
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func (c *AccessConfig) Region() string {
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return c.RawRegion
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}
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func (c *AccessConfig) Prepare(t *packer.ConfigTemplate) []error {
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if t == nil {
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var err error
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t, err = packer.NewConfigTemplate()
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if err != nil {
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return []error{err}
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}
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}
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templates := map[string]*string{
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"username": &c.Username,
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"password": &c.Password,
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"provider": &c.Provider,
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}
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errs := make([]error, 0)
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for n, ptr := range templates {
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var err error
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*ptr, err = t.Process(*ptr, nil)
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if err != nil {
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errs = append(
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errs, fmt.Errorf("Error processing %s: %s", n, err))
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}
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}
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if c.RawRegion == "" {
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errs = append(errs, fmt.Errorf("region must be specified"))
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}
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if len(errs) > 0 {
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return errs
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}
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return nil
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}
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