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Add pull through cache functionality to the Registry which can be configured

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with a new `proxy` section in the configuration file.

Create a new registry type which delegates storage to a proxyBlobStore
and proxyManifestStore.  These stores will pull through data if not present
locally.  proxyBlobStore takes care not to write duplicate data to disk.

Add a scheduler to cleanup expired content. The scheduler runs as a background
goroutine.  When a blob or manifest is pulled through from the remote registry,
an entry is added to the scheduler with a TTL.  When the TTL expires the
scheduler calls a pre-specified function to remove the fetched resource.

Add token authentication to the registry middleware.  Get a token at startup
and preload the credential store with the username and password supplied in the
config file.

Allow resumable digest functionality to be disabled at runtime and disable
it when the registry is a pull through cache.

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
This commit is contained in:
Richard Scothern 2015-07-29 11:12:01 -07:00
parent 9dac3cc571
commit d1cb12fa3d
24 changed files with 1682 additions and 38 deletions
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7
docs/middleware/repository/middleware.go
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@ -4,11 +4,12 @@ import (
"fmt"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
)
// InitFunc is the type of a RepositoryMiddleware factory function and is
// used to register the constructor for different RepositoryMiddleware backends.
type InitFunc func(repository distribution.Repository, options map[string]interface{}) (distribution.Repository, error)
type InitFunc func(ctx context.Context, repository distribution.Repository, options map[string]interface{}) (distribution.Repository, error)
var middlewares map[string]InitFunc
@ -28,10 +29,10 @@ func Register(name string, initFunc InitFunc) error {
}
// Get constructs a RepositoryMiddleware with the given options using the named backend.
func Get(name string, options map[string]interface{}, repository distribution.Repository) (distribution.Repository, error) {
func Get(ctx context.Context, name string, options map[string]interface{}, repository distribution.Repository) (distribution.Repository, error) {
if middlewares != nil {
if initFunc, exists := middlewares[name]; exists {
return initFunc(repository, options)
return initFunc(ctx, repository, options)
}
}