8c74da3983
With this changeset, image store access is now moved to completely accessible over GRPC. No clients manipulate the image store database directly and the GRPC client is fully featured. The metadata database is now managed by the daemon and access coordinated via services. Signed-off-by: Stephen J Day <stephen.day@docker.com>
81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package plugin
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import (
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"fmt"
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"sync"
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"github.com/boltdb/bolt"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/content"
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"github.com/containerd/containerd/snapshot"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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type PluginType int
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const (
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RuntimePlugin PluginType = iota + 1
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GRPCPlugin
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SnapshotPlugin
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ContainerMonitorPlugin
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)
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type Registration struct {
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Type PluginType
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Config interface{}
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Init func(*InitContext) (interface{}, error)
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}
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// TODO(@crosbymichael): how to we keep this struct from growing but support dependency injection for loaded plugins?
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type InitContext struct {
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Root string
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State string
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Runtimes map[string]containerd.Runtime
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Content *content.Store
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Meta *bolt.DB
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Snapshotter snapshot.Snapshotter
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Config interface{}
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Context context.Context
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Monitor ContainerMonitor
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}
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type Service interface {
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Register(*grpc.Server) error
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}
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var register = struct {
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sync.Mutex
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r map[string]*Registration
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}{
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r: make(map[string]*Registration),
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}
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// Load loads all plugins at the provided path into containerd
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func Load(path string) (err error) {
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defer func() {
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if v := recover(); v != nil {
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rerr, ok := v.(error)
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if !ok {
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rerr = fmt.Errorf("%s", v)
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}
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err = rerr
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}
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}()
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return loadPlugins(path)
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}
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func Register(name string, r *Registration) error {
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register.Lock()
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defer register.Unlock()
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if _, ok := register.r[name]; ok {
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return fmt.Errorf("plugin already registered as %q", name)
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}
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register.r[name] = r
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return nil
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}
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func Registrations() map[string]*Registration {
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return register.r
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}
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