115 lines
2.6 KiB
Go
115 lines
2.6 KiB
Go
package remote
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import (
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"bytes"
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"crypto/md5"
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"fmt"
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"os"
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"strings"
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"github.com/rackspace/gophercloud"
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"github.com/rackspace/gophercloud/openstack"
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"github.com/rackspace/gophercloud/openstack/objectstorage/v1/containers"
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"github.com/rackspace/gophercloud/openstack/objectstorage/v1/objects"
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)
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const TFSTATE_NAME = "tfstate.tf"
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// SwiftClient implements the Client interface for an Openstack Swift server.
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type SwiftClient struct {
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client *gophercloud.ServiceClient
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path string
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}
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func swiftFactory(conf map[string]string) (Client, error) {
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client := &SwiftClient{}
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if err := client.validateConfig(conf); err != nil {
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return nil, err
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}
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return client, nil
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}
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func (c *SwiftClient) validateConfig(conf map[string]string) (err error) {
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if val := os.Getenv("OS_AUTH_URL"); val == "" {
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return fmt.Errorf("missing OS_AUTH_URL environment variable")
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}
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if val := os.Getenv("OS_USERNAME"); val == "" {
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return fmt.Errorf("missing OS_USERNAME environment variable")
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}
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if val := os.Getenv("OS_TENANT_NAME"); val == "" {
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return fmt.Errorf("missing OS_TENANT_NAME environment variable")
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}
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if val := os.Getenv("OS_PASSWORD"); val == "" {
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return fmt.Errorf("missing OS_PASSWORD environment variable")
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}
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path, ok := conf["path"]
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if !ok || path == "" {
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return fmt.Errorf("missing 'path' configuration")
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}
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provider, err := openstack.AuthenticatedClient(gophercloud.AuthOptions{
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IdentityEndpoint: os.Getenv("OS_AUTH_URL"),
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Username: os.Getenv("OS_USERNAME"),
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TenantName: os.Getenv("OS_TENANT_NAME"),
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Password: os.Getenv("OS_PASSWORD"),
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})
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if err != nil {
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return err
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}
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c.path = path
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c.client, err = openstack.NewObjectStorageV1(provider, gophercloud.EndpointOpts{
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Region: os.Getenv("OS_REGION_NAME"),
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})
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return err
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}
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func (c *SwiftClient) Get() (*Payload, error) {
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result := objects.Download(c.client, c.path, TFSTATE_NAME, nil)
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bytes, err := result.ExtractContent()
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if err != nil {
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if strings.Contains(err.Error(), "but got 404 instead") {
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return nil, nil
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}
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return nil, err
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}
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hash := md5.Sum(bytes)
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payload := &Payload{
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Data: bytes,
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MD5: hash[:md5.Size],
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}
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return payload, nil
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}
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func (c *SwiftClient) Put(data []byte) error {
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if err := c.ensureContainerExists(); err != nil {
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return err
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}
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reader := bytes.NewReader(data)
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result := objects.Create(c.client, c.path, TFSTATE_NAME, reader, nil)
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return result.Err
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}
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func (c *SwiftClient) Delete() error {
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result := objects.Delete(c.client, c.path, TFSTATE_NAME, nil)
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return result.Err
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}
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func (c *SwiftClient) ensureContainerExists() error {
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result := containers.Create(c.client, c.path, nil)
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if result.Err != nil {
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return result.Err
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}
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return nil
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}
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