Move persistent datastores to plugins

cmd/ipfs/main.go

@@ -174,10 +174,11 @@ func makeExecutor(req *cmds.Request, env interface{}) (cmds.Executor, error) {
 		if err != nil {
 			return nil, err
 		}
-		if ok {
-			if _, err := loader.LoadPlugins(pluginpath); err != nil {
-				log.Error("error loading plugins: ", err)
-			}
+		if !ok {
+			pluginpath = ""
+		}
+		if _, err := loader.LoadPlugins(pluginpath); err != nil {
+			log.Error("error loading plugins: ", err)
 		}
 
 		exctr = cmds.NewExecutor(req.Root)

plugin/loader/load.go

@@ -22,28 +22,30 @@ func LoadPlugins(pluginDir string) ([]plugin.Plugin, error) {
 		plMap[v.Name()] = v
 	}
 
-	newPls, err := loadDynamicPlugins(pluginDir)
-	if err != nil {
-		return nil, err
-	}
+	if pluginDir != "" {
+		newPls, err := loadDynamicPlugins(pluginDir)
+		if err != nil {
+			return nil, err
+		}
 
-	for _, pl := range newPls {
-		if ppl, ok := plMap[pl.Name()]; ok {
-			// plugin is already preloaded
-			return nil, fmt.Errorf(
-				"plugin: %s, is duplicated in version: %s, "+
-					"while trying to load dynamically: %s",
-				ppl.Name(), ppl.Version(), pl.Version())
+		for _, pl := range newPls {
+			if ppl, ok := plMap[pl.Name()]; ok {
+				// plugin is already preloaded
+				return nil, fmt.Errorf(
+					"plugin: %s, is duplicated in version: %s, "+
+						"while trying to load dynamically: %s",
+					ppl.Name(), ppl.Version(), pl.Version())
+			}
+			plMap[pl.Name()] = pl
 		}
-		plMap[pl.Name()] = pl
 	}
 
 	pls := make([]plugin.Plugin, 0, len(plMap))
 	for _, v := range plMap {
 		pls = append(pls, v)
 	}
 
-	err = initialize(pls)
+	err := initialize(pls)
 	if err != nil {
 		return nil, err
 	}

plugin/loader/preload.go

@@ -2,7 +2,10 @@ package loader
 
 import (
 	"github.com/ipfs/go-ipfs/plugin"
+	pluginbadgerds "github.com/ipfs/go-ipfs/plugin/plugins/badgerds"
+	pluginflatfs "github.com/ipfs/go-ipfs/plugin/plugins/flatfs"
 	pluginipldgit "github.com/ipfs/go-ipfs/plugin/plugins/git"
+	pluginlevelds "github.com/ipfs/go-ipfs/plugin/plugins/levelds"
 )
 
 // DO NOT EDIT THIS FILE
@@ -11,4 +14,7 @@ import (
 
 var preloadPlugins = []plugin.Plugin{
 	pluginipldgit.Plugins[0],
+	pluginbadgerds.Plugins[0],
+	pluginflatfs.Plugins[0],
+	pluginlevelds.Plugins[0],
 }

plugin/loader/preload_list

@@ -4,3 +4,7 @@
 # name             go-path                  number of the sub-plugin
 
 ipldgit github.com/ipfs/go-ipfs/plugin/plugins/git 0
+
+badgerds github.com/ipfs/go-ipfs/plugin/plugins/badgerds 0
+flatfs github.com/ipfs/go-ipfs/plugin/plugins/flatfs 0
+levelds github.com/ipfs/go-ipfs/plugin/plugins/levelds 0

plugin/plugins/Rules.mk

@@ -1,6 +1,6 @@
 include mk/header.mk
 
-$(d)_plugins:=$(d)/git
+$(d)_plugins:=$(d)/git $(d)/badgerds $(d)/flatfs $(d)/levelds
 $(d)_plugins_so:=$(addsuffix .so,$($(d)_plugins))
 $(d)_plugins_main:=$(addsuffix /main/main.go,$($(d)_plugins))
 

plugin/plugins/badgerds/badgerds.go

@@ -0,0 +1,114 @@
+package badgerds
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/ipfs/go-ipfs/plugin"
+	"github.com/ipfs/go-ipfs/repo"
+	"github.com/ipfs/go-ipfs/repo/fsrepo"
+
+	humanize "gx/ipfs/QmPSBJL4momYnE7DcUyk2DVhD6rH488ZmHBGLbxNdhU44K/go-humanize"
+	badgerds "gx/ipfs/QmaixNkKwtinV3umL5VD1VDD5CQjnZhXY31awM2YHTzbui/go-ds-badger"
+)
+
+// Plugins is exported list of plugins that will be loaded
+var Plugins = []plugin.Plugin{
+	&badgerdsPlugin{},
+}
+
+type badgerdsPlugin struct{}
+
+var _ plugin.PluginDatastore = (*badgerdsPlugin)(nil)
+
+func (*badgerdsPlugin) Name() string {
+	return "ds-badgerds"
+}
+
+func (*badgerdsPlugin) Version() string {
+	return "0.1.0"
+}
+
+func (*badgerdsPlugin) Init() error {
+	return nil
+}
+
+func (*badgerdsPlugin) DatastoreTypeName() string {
+	return "badgerds"
+}
+
+type datastoreConfig struct {
+	path       string
+	syncWrites bool
+
+	vlogFileSize int64
+}
+
+// BadgerdsDatastoreConfig returns a configuration stub for a badger datastore
+// from the given parameters
+func (*badgerdsPlugin) DatastoreConfigParser() fsrepo.ConfigFromMap {
+	return func(params map[string]interface{}) (fsrepo.DatastoreConfig, error) {
+		var c datastoreConfig
+		var ok bool
+
+		c.path, ok = params["path"].(string)
+		if !ok {
+			return nil, fmt.Errorf("'path' field is missing or not string")
+		}
+
+		sw, ok := params["syncWrites"]
+		if !ok {
+			c.syncWrites = true
+		} else {
+			if swb, ok := sw.(bool); ok {
+				c.syncWrites = swb
+			} else {
+				return nil, fmt.Errorf("'syncWrites' field was not a boolean")
+			}
+		}
+
+		vls, ok := params["vlogFileSize"]
+		if !ok {
+			// default to 1GiB
+			c.vlogFileSize = badgerds.DefaultOptions.ValueLogFileSize
+		} else {
+			if vlogSize, ok := vls.(string); ok {
+				s, err := humanize.ParseBytes(vlogSize)
+				if err != nil {
+					return nil, err
+				}
+				c.vlogFileSize = int64(s)
+			} else {
+				return nil, fmt.Errorf("'vlogFileSize' field was not a string")
+			}
+		}
+
+		return &c, nil
+	}
+}
+
+func (c *datastoreConfig) DiskSpec() fsrepo.DiskSpec {
+	return map[string]interface{}{
+		"type": "badgerds",
+		"path": c.path,
+	}
+}
+
+func (c *datastoreConfig) Create(path string) (repo.Datastore, error) {
+	p := c.path
+	if !filepath.IsAbs(p) {
+		p = filepath.Join(path, p)
+	}
+
+	err := os.MkdirAll(p, 0755)
+	if err != nil {
+		return nil, err
+	}
+
+	defopts := badgerds.DefaultOptions
+	defopts.SyncWrites = c.syncWrites
+	defopts.ValueLogFileSize = c.vlogFileSize
+
+	return badgerds.NewDatastore(p, &defopts)
+}

plugin/plugins/flatfs/flatfs.go

@@ -0,0 +1,90 @@
+package flatfs
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/ipfs/go-ipfs/plugin"
+	"github.com/ipfs/go-ipfs/repo"
+	"github.com/ipfs/go-ipfs/repo/fsrepo"
+
+	flatfs "gx/ipfs/QmVFboKxbVJZMJAoFdvX6q4hzvXFkbWCE8DejnqrQV4ZtN/go-ds-flatfs"
+)
+
+// Plugins is exported list of plugins that will be loaded
+var Plugins = []plugin.Plugin{
+	&flatfsPlugin{},
+}
+
+type flatfsPlugin struct{}
+
+var _ plugin.PluginDatastore = (*flatfsPlugin)(nil)
+
+func (*flatfsPlugin) Name() string {
+	return "ds-flatfs"
+}
+
+func (*flatfsPlugin) Version() string {
+	return "0.1.0"
+}
+
+func (*flatfsPlugin) Init() error {
+	return nil
+}
+
+func (*flatfsPlugin) DatastoreTypeName() string {
+	return "flatfs"
+}
+
+type datastoreConfig struct {
+	path      string
+	shardFun  *flatfs.ShardIdV1
+	syncField bool
+}
+
+// BadgerdsDatastoreConfig returns a configuration stub for a badger datastore
+// from the given parameters
+func (*flatfsPlugin) DatastoreConfigParser() fsrepo.ConfigFromMap {
+	return func(params map[string]interface{}) (fsrepo.DatastoreConfig, error) {
+		var c datastoreConfig
+		var ok bool
+		var err error
+
+		c.path, ok = params["path"].(string)
+		if !ok {
+			return nil, fmt.Errorf("'path' field is missing or not boolean")
+		}
+
+		sshardFun, ok := params["shardFunc"].(string)
+		if !ok {
+			return nil, fmt.Errorf("'shardFunc' field is missing or not a string")
+		}
+		c.shardFun, err = flatfs.ParseShardFunc(sshardFun)
+		if err != nil {
+			return nil, err
+		}
+
+		c.syncField, ok = params["sync"].(bool)
+		if !ok {
+			return nil, fmt.Errorf("'sync' field is missing or not boolean")
+		}
+		return &c, nil
+	}
+}
+
+func (c *datastoreConfig) DiskSpec() fsrepo.DiskSpec {
+	return map[string]interface{}{
+		"type":      "flatfs",
+		"path":      c.path,
+		"shardFunc": c.shardFun.String(),
+	}
+}
+
+func (c *datastoreConfig) Create(path string) (repo.Datastore, error) {
+	p := c.path
+	if !filepath.IsAbs(p) {
+		p = filepath.Join(path, p)
+	}
+
+	return flatfs.CreateOrOpen(p, c.shardFun, c.syncField)
+}

plugin/plugins/levelds/levelds.go

@@ -0,0 +1,88 @@
+package levelds
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/ipfs/go-ipfs/plugin"
+	"github.com/ipfs/go-ipfs/repo"
+	"github.com/ipfs/go-ipfs/repo/fsrepo"
+
+	ldbopts "gx/ipfs/QmbBhyDKsY4mbY6xsKt3qu9Y7FPvMJ6qbD8AMjYYvPRw1g/goleveldb/leveldb/opt"
+	levelds "gx/ipfs/QmccqjKZUTqp4ikWNyAbjBuP5HEdqSqRuAr9mcEhYab54a/go-ds-leveldb"
+)
+
+// Plugins is exported list of plugins that will be loaded
+var Plugins = []plugin.Plugin{
+	&leveldsPlugin{},
+}
+
+type leveldsPlugin struct{}
+
+var _ plugin.PluginDatastore = (*leveldsPlugin)(nil)
+
+func (*leveldsPlugin) Name() string {
+	return "ds-level"
+}
+
+func (*leveldsPlugin) Version() string {
+	return "0.1.0"
+}
+
+func (*leveldsPlugin) Init() error {
+	return nil
+}
+
+func (*leveldsPlugin) DatastoreTypeName() string {
+	return "levelds"
+}
+
+type datastoreConfig struct {
+	path        string
+	compression ldbopts.Compression
+}
+
+// BadgerdsDatastoreConfig returns a configuration stub for a badger datastore
+// from the given parameters
+func (*leveldsPlugin) DatastoreConfigParser() fsrepo.ConfigFromMap {
+	return func(params map[string]interface{}) (fsrepo.DatastoreConfig, error) {
+		var c datastoreConfig
+		var ok bool
+
+		c.path, ok = params["path"].(string)
+		if !ok {
+			return nil, fmt.Errorf("'path' field is missing or not string")
+		}
+
+		switch cm := params["compression"].(string); cm {
+		case "none":
+			c.compression = ldbopts.NoCompression
+		case "snappy":
+			c.compression = ldbopts.SnappyCompression
+		case "":
+			c.compression = ldbopts.DefaultCompression
+		default:
+			return nil, fmt.Errorf("unrecognized value for compression: %s", cm)
+		}
+
+		return &c, nil
+	}
+}
+
+func (c *datastoreConfig) DiskSpec() fsrepo.DiskSpec {
+	return map[string]interface{}{
+		"type": "levelds",
+		"path": c.path,
+	}
+}
+
+func (c *datastoreConfig) Create(path string) (repo.Datastore, error) {
+	p := c.path
+	if !filepath.IsAbs(p) {
+		p = filepath.Join(path, p)
+	}
+
+	return levelds.NewDatastore(p, &levelds.Options{
+		Compression: c.compression,
+	})
+}