embed: define "embed.CompactorMode*"

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

CHANGELOG-3.4.md

@@ -23,9 +23,12 @@
   - Remove recursive symlinks in `cmd` directory.
   - Now `go get/install/build` on `etcd` packages (e.g. `clientv3`, `tools/benchmark`) enforce builds with etcd `vendor` directory.
 - Reorganize [internal packages](https://github.com/coreos/etcd/issues/9220).
+  - `internal/*` packages [cannot be(are not meant to be) imported by external projects](https://docs.google.com/document/d/1e8kOo3r51b2BWtTs_1uADIA5djfXhPT36s6eHVRIvaU/edit).
   - Move `"github.com/coreos/etcd/alarm"` to [`"github.com/coreos/etcd/internal/alarm"`](https://github.com/coreos/etcd/pull/9234).
   - Move `"github.com/coreos/etcd/auth"` to [`"github.com/coreos/etcd/internal/auth"`](https://github.com/coreos/etcd/pull/9243).
   - Move `"github.com/coreos/etcd/compactor"` to [`"github.com/coreos/etcd/internal/compactor"`](https://github.com/coreos/etcd/pull/9234).
+    - [`embed.CompactorModePeriodic`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModePeriodic`.
+    - [`embed.CompactorModeRevision`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModeRevision`.
   - Move `"github.com/coreos/etcd/discovery"` to [`"github.com/coreos/etcd/internal/discovery"`](https://github.com/coreos/etcd/pull/9233).
   - Move `"github.com/coreos/etcd/lease"` to [`"github.com/coreos/etcd/internal/lease"`](https://github.com/coreos/etcd/pull/9238).
   - Move `"github.com/coreos/etcd/mvcc"` to [`"github.com/coreos/etcd/internal/mvcc"`](https://github.com/coreos/etcd/pull/9238).

embed/config.go

@@ -27,6 +27,7 @@ import (
 	"time"
 
 	"github.com/coreos/etcd/etcdserver"
+	"github.com/coreos/etcd/internal/compactor"
 	"github.com/coreos/etcd/pkg/cors"
 	"github.com/coreos/etcd/pkg/netutil"
 	"github.com/coreos/etcd/pkg/srv"
@@ -82,6 +83,23 @@ var (
 	defaultHostStatus error
 )
 
+var (
+	// CompactorModePeriodic is periodic compaction mode
+	// for "Config.AutoCompactionMode" field.
+	// If "AutoCompactionMode" is CompactorModePeriodic and
+	// "AutoCompactionRetention" is "1h", it automatically compacts
+	// compacts storage every hour.
+	CompactorModePeriodic = compactor.ModePeriodic
+
+	// CompactorModeRevision is revision-based compaction mode
+	// for "Config.AutoCompactionMode" field.
+	// If "AutoCompactionMode" is CompactorModeRevision and
+	// "AutoCompactionRetention" is "1000", it compacts log on
+	// revision 5000 when the current revision is 6000.
+	// This runs every 5-minute if enough of logs have proceeded.
+	CompactorModeRevision = compactor.ModeRevision
+)
+
 func init() {
 	defaultHostname, defaultHostStatus = netutil.GetDefaultHost()
 }