github/containerd
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Generalize the plugin package

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Remove containerd specific parts of the plugin package to prepare its
move out of the main repository. Separate the plugin registration
singleton into a separate package.

Separating out the plugin package and registration makes it easier to
implement external plugins without creating a dependency loop.

Signed-off-by: Derek McGowan <derek@mcg.dev>
This commit is contained in:
Derek McGowan
2023-10-12 15:36:02 -07:00
parent a80606bc2d
commit 7b2a918213
65 changed files with 363 additions and 299 deletions
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27
services/server/server.go
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@@ -46,6 +46,7 @@ import (
"github.com/containerd/containerd/pkg/timeout"
"github.com/containerd/containerd/platforms"
"github.com/containerd/containerd/plugin"
"github.com/containerd/containerd/plugin/registry"
"github.com/containerd/containerd/plugins"
srvconfig "github.com/containerd/containerd/services/server/config"
ssproxy "github.com/containerd/containerd/snapshots/proxy"
@@ -245,13 +246,14 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
initContext := plugin.NewContext(
ctx,
p,
initialized,
config.Root,
config.State,
map[string]string{
plugins.PropertyRootDir: filepath.Join(config.Root, id),
plugins.PropertyStateDir: filepath.Join(config.State, id),
plugins.PropertyGRPCAddress: config.GRPC.Address,
plugins.PropertyTTRPCAddress: config.TTRPC.Address,
},
)
initContext.Address = config.GRPC.Address
initContext.TTRPCAddress = config.TTRPC.Address
initContext.RegisterReadiness = func() func() {
atomic.StoreInt32(&mustSucceed, 1)
return s.RegisterReadiness()
@@ -259,7 +261,7 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
// load the plugin specific configuration if it is provided
if p.Config != nil {
pc, err := config.Decode(ctx, p)
pc, err := config.Decode(ctx, id, p.Config)
if err != nil {
return nil, err
}
@@ -426,7 +428,7 @@ func (s *Server) Wait() {
// LoadPlugins loads all plugins into containerd and generates an ordered graph
// of all plugins.
func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]*plugin.Registration, error) {
func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]plugin.Registration, error) {
// load all plugins into containerd
path := config.PluginDir
if path == "" {
@@ -436,12 +438,13 @@ func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]*plugin.Regis
return nil, err
}
// load additional plugins that don't automatically register themselves
plugin.Register(&plugin.Registration{
registry.Register(&plugin.Registration{
Type: plugins.ContentPlugin,
ID: "content",
InitFn: func(ic *plugin.InitContext) (interface{}, error) {
ic.Meta.Exports["root"] = ic.Root
return local.NewStore(ic.Root)
root := ic.Properties[plugins.PropertyRootDir]
ic.Meta.Exports["root"] = root
return local.NewStore(root)
},
})
@@ -486,7 +489,7 @@ func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]*plugin.Regis
p = platforms.DefaultSpec()
}
plugin.Register(&plugin.Registration{
registry.Register(&plugin.Registration{
Type: t,
ID: name,
InitFn: func(ic *plugin.InitContext) (interface{}, error) {
@@ -504,7 +507,7 @@ func LoadPlugins(ctx context.Context, config *srvconfig.Config) ([]*plugin.Regis
filter := srvconfig.V2DisabledFilter
// return the ordered graph for plugins
return plugin.Graph(filter(config.DisabledPlugins)), nil
return registry.Graph(filter(config.DisabledPlugins)), nil
}
type proxyClients struct {