Merge pull request #1665 from andrewhsu/middleware-redirect

add middleware storage driver for redirect
This commit is contained in:
Richard Scothern 2016-04-27 15:05:52 -07:00
commit a7dda2ce93
3 changed files with 123 additions and 3 deletions

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@ -165,6 +165,10 @@ information about each option that appears later in this page.
privatekey: /path/to/pem
keypairid: cloudfrontkeypairid
duration: 3000s
storage:
- name: redirect
options:
baseurl: https://example.com/
reporting:
bugsnag:
apikey: bugsnagapikey
@ -676,8 +680,7 @@ object they're wrapping. This means a registry middleware must implement the
`distribution.Repository`, and storage middleware must implement
`driver.StorageDriver`.
Currently only one middleware, `cloudfront`, a storage middleware, is supported
in the registry implementation.
An example configuration of the `cloudfront` middleware, a storage middleware:
middleware:
registry:
@ -758,6 +761,15 @@ interpretation of the options.
</tr>
</table>
### redirect
In place of the `cloudfront` storage middleware, the `redirect`
storage middleware can be used to specify a custom URL to a location
of a proxy for the layer stored by the S3 storage driver.
| Parameter | Required | Description |
| --- | --- | --- |
| baseurl | yes | `SCHEME://HOST` at which layers are served. Can also contain port. For example, `https://example.com:5443`. |
## reporting
@ -1794,7 +1806,7 @@ This example illustrates how to configure storage middleware in a registry.
Middleware allows the registry to serve layers via a content delivery network
(CDN). This is useful for reducing requests to the storage layer.
Currently, the registry supports [Amazon
The registry supports [Amazon
Cloudfront](http://aws.amazon.com/cloudfront/). You can only use Cloudfront in
conjunction with the S3 storage driver.

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@ -0,0 +1,50 @@
package middleware
import (
"fmt"
"net/url"
"github.com/docker/distribution/context"
storagedriver "github.com/docker/distribution/registry/storage/driver"
storagemiddleware "github.com/docker/distribution/registry/storage/driver/middleware"
)
type redirectStorageMiddleware struct {
storagedriver.StorageDriver
scheme string
host string
}
var _ storagedriver.StorageDriver = &redirectStorageMiddleware{}
func newRedirectStorageMiddleware(sd storagedriver.StorageDriver, options map[string]interface{}) (storagedriver.StorageDriver, error) {
o, ok := options["baseurl"]
if !ok {
return nil, fmt.Errorf("no baseurl provided")
}
b, ok := o.(string)
if !ok {
return nil, fmt.Errorf("baseurl must be a string")
}
u, err := url.Parse(b)
if err != nil {
return nil, fmt.Errorf("unable to parse redirect baseurl: %s", b)
}
if u.Scheme == "" {
return nil, fmt.Errorf("no scheme specified for redirect baseurl")
}
if u.Host == "" {
return nil, fmt.Errorf("no host specified for redirect baseurl")
}
return &redirectStorageMiddleware{StorageDriver: sd, scheme: u.Scheme, host: u.Host}, nil
}
func (r *redirectStorageMiddleware) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
u := &url.URL{Scheme: r.scheme, Host: r.host, Path: path}
return u.String(), nil
}
func init() {
storagemiddleware.Register("redirect", storagemiddleware.InitFunc(newRedirectStorageMiddleware))
}

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@ -0,0 +1,58 @@
package middleware
import (
"testing"
check "gopkg.in/check.v1"
)
func Test(t *testing.T) { check.TestingT(t) }
type MiddlewareSuite struct{}
var _ = check.Suite(&MiddlewareSuite{})
func (s *MiddlewareSuite) TestNoConfig(c *check.C) {
options := make(map[string]interface{})
_, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.ErrorMatches, "no baseurl provided")
}
func (s *MiddlewareSuite) TestMissingScheme(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "example.com"
_, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.ErrorMatches, "no scheme specified for redirect baseurl")
}
func (s *MiddlewareSuite) TestHttpsPort(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "https://example.com:5443"
middleware, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.Equals, nil)
m, ok := middleware.(*redirectStorageMiddleware)
c.Assert(ok, check.Equals, true)
c.Assert(m.scheme, check.Equals, "https")
c.Assert(m.host, check.Equals, "example.com:5443")
url, err := middleware.URLFor(nil, "/rick/data", nil)
c.Assert(err, check.Equals, nil)
c.Assert(url, check.Equals, "https://example.com:5443/rick/data")
}
func (s *MiddlewareSuite) TestHTTP(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "http://example.com"
middleware, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.Equals, nil)
m, ok := middleware.(*redirectStorageMiddleware)
c.Assert(ok, check.Equals, true)
c.Assert(m.scheme, check.Equals, "http")
c.Assert(m.host, check.Equals, "example.com")
url, err := middleware.URLFor(nil, "morty/data", nil)
c.Assert(err, check.Equals, nil)
c.Assert(url, check.Equals, "http://example.com/morty/data")
}