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package graphdriver // import "github.com/docker/docker/daemon/graphdriver"
import (
"fmt"
"path/filepath"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/plugins"
v2 "github.com/docker/docker/plugin/v2"
"github.com/pkg/errors"
)
func lookupPlugin(name string, pg plugingetter.PluginGetter, config Options) (Driver, error) {
if !config.ExperimentalEnabled {
return nil, fmt.Errorf("graphdriver plugins are only supported with experimental mode")
}
pl, err := pg.Get(name, "GraphDriver", plugingetter.Acquire)
if err != nil {
return nil, fmt.Errorf("Error looking up graphdriver plugin %s: %v", name, err)
}
return newPluginDriver(name, pl, config)
}
func newPluginDriver(name string, pl plugingetter.CompatPlugin, config Options) (Driver, error) {
home := config.Root
if !pl.IsV1() {
if p, ok := pl.(*v2.Plugin); ok {
if p.PluginObj.Config.PropagatedMount != "" {
home = p.PluginObj.Config.PropagatedMount
}
}
}
var proxy *graphDriverProxy
switch pt := pl.(type) {
case plugingetter.PluginWithV1Client:
proxy = &graphDriverProxy{name, pl, Capabilities{}, pt.Client()}
case plugingetter.PluginAddr:
if pt.Protocol() != plugins.ProtocolSchemeHTTPV1 {
return nil, errors.Errorf("plugin protocol not supported: %s", pt.Protocol())
}
addr := pt.Addr()
client, err := plugins.NewClientWithTimeout(addr.Network()+"://"+addr.String(), nil, pt.Timeout())
if err != nil {
return nil, errors.Wrap(err, "error creating plugin client")
}
proxy = &graphDriverProxy{name, pl, Capabilities{}, client}
default:
return nil, errdefs.System(errors.Errorf("got unknown plugin type %T", pt))
}
return proxy, proxy.Init(filepath.Join(home, name), config.DriverOptions, config.UIDMaps, config.GIDMaps)
}
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