7c77df8acc
This makes it a bit simpler to remove this interface for v2 plugins and not break external projects (libnetwork and swarmkit). Note that before we remove the `Client()` interface from `CompatPlugin` libnetwork and swarmkit must be updated to explicitly check for the v1 client interface as is done int his PR. This is just a minor tweak that I realized is needed after trying to implement the needed changes on libnetwork. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
package graphdriver // import "github.com/docker/docker/daemon/graphdriver"
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import (
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"fmt"
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"path/filepath"
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"github.com/docker/docker/errdefs"
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"github.com/docker/docker/pkg/plugingetter"
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"github.com/docker/docker/pkg/plugins"
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"github.com/docker/docker/plugin/v2"
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"github.com/pkg/errors"
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)
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func lookupPlugin(name string, pg plugingetter.PluginGetter, config Options) (Driver, error) {
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if !config.ExperimentalEnabled {
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return nil, fmt.Errorf("graphdriver plugins are only supported with experimental mode")
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}
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pl, err := pg.Get(name, "GraphDriver", plugingetter.Acquire)
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if err != nil {
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return nil, fmt.Errorf("Error looking up graphdriver plugin %s: %v", name, err)
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}
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return newPluginDriver(name, pl, config)
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}
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func newPluginDriver(name string, pl plugingetter.CompatPlugin, config Options) (Driver, error) {
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home := config.Root
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if !pl.IsV1() {
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if p, ok := pl.(*v2.Plugin); ok {
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if p.PluginObj.Config.PropagatedMount != "" {
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home = p.PluginObj.Config.PropagatedMount
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}
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}
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}
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var proxy *graphDriverProxy
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switch pt := pl.(type) {
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case plugingetter.PluginWithV1Client:
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proxy = &graphDriverProxy{name, pl, Capabilities{}, pt.Client()}
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case plugingetter.PluginAddr:
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if pt.Protocol() != plugins.ProtocolSchemeHTTPV1 {
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return nil, errors.Errorf("plugin protocol not supported: %s", pt.Protocol())
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}
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addr := pt.Addr()
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client, err := plugins.NewClientWithTimeout(addr.Network()+"://"+addr.String(), nil, pt.Timeout())
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if err != nil {
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return nil, errors.Wrap(err, "error creating plugin client")
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}
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proxy = &graphDriverProxy{name, pl, Capabilities{}, client}
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default:
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return nil, errdefs.System(errors.Errorf("got unknown plugin type %T", pt))
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}
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return proxy, proxy.Init(filepath.Join(home, name), config.DriverOptions, config.UIDMaps, config.GIDMaps)
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}
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