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This patch introduces a new experimental engine-level plugin management with a new API and command line. Plugins can be distributed via a Docker registry, and their lifecycle is managed by the engine. This makes plugins a first-class construct. For more background, have a look at issue #20363. Documentation is in a separate commit. If you want to understand how the new plugin system works, you can start by reading the documentation. Note: backwards compatibility with existing plugins is maintained, albeit they won't benefit from the advantages of the new system. Signed-off-by: Tibor Vass <tibor@docker.com> Signed-off-by: Anusha Ragunathan <anusha@docker.com>
32 lines
1,003 B
Go
32 lines
1,003 B
Go
// +build experimental
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package graphdriver
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import (
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"fmt"
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"io"
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"github.com/docker/docker/pkg/plugins"
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)
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type pluginClient interface {
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// Call calls the specified method with the specified arguments for the plugin.
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Call(string, interface{}, interface{}) error
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// Stream calls the specified method with the specified arguments for the plugin and returns the response IO stream
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Stream(string, interface{}) (io.ReadCloser, error)
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// SendFile calls the specified method, and passes through the IO stream
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SendFile(string, io.Reader, interface{}) error
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}
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func lookupPlugin(name, home string, opts []string) (Driver, error) {
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pl, err := plugins.Get(name, "GraphDriver")
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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, home, opts, pl.Client())
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}
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func newPluginDriver(name, home string, opts []string, c pluginClient) (Driver, error) {
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proxy := &graphDriverProxy{name, c}
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return proxy, proxy.Init(home, opts)
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}
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