server: Move server files to 'server' directory.

26  git mv mvcc wal auth etcdserver etcdmain proxy embed/ lease/ server
   36  git mv go.mod go.sum server

server/etcdserver/errors.go

@@ -0,0 +1,56 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package etcdserver
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrUnknownMethod                 = errors.New("etcdserver: unknown method")
+	ErrStopped                       = errors.New("etcdserver: server stopped")
+	ErrCanceled                      = errors.New("etcdserver: request cancelled")
+	ErrTimeout                       = errors.New("etcdserver: request timed out")
+	ErrTimeoutDueToLeaderFail        = errors.New("etcdserver: request timed out, possibly due to previous leader failure")
+	ErrTimeoutDueToConnectionLost    = errors.New("etcdserver: request timed out, possibly due to connection lost")
+	ErrTimeoutLeaderTransfer         = errors.New("etcdserver: request timed out, leader transfer took too long")
+	ErrLeaderChanged                 = errors.New("etcdserver: leader changed")
+	ErrNotEnoughStartedMembers       = errors.New("etcdserver: re-configuration failed due to not enough started members")
+	ErrLearnerNotReady               = errors.New("etcdserver: can only promote a learner member which is in sync with leader")
+	ErrNoLeader                      = errors.New("etcdserver: no leader")
+	ErrNotLeader                     = errors.New("etcdserver: not leader")
+	ErrRequestTooLarge               = errors.New("etcdserver: request is too large")
+	ErrNoSpace                       = errors.New("etcdserver: no space")
+	ErrTooManyRequests               = errors.New("etcdserver: too many requests")
+	ErrUnhealthy                     = errors.New("etcdserver: unhealthy cluster")
+	ErrKeyNotFound                   = errors.New("etcdserver: key not found")
+	ErrCorrupt                       = errors.New("etcdserver: corrupt cluster")
+	ErrBadLeaderTransferee           = errors.New("etcdserver: bad leader transferee")
+	ErrClusterVersionUnavailable     = errors.New("etcdserver: cluster version not found during downgrade")
+	ErrWrongDowngradeVersionFormat   = errors.New("etcdserver: wrong downgrade target version format")
+	ErrInvalidDowngradeTargetVersion = errors.New("etcdserver: invalid downgrade target version")
+	ErrDowngradeInProcess            = errors.New("etcdserver: cluster has a downgrade job in progress")
+	ErrNoInflightDowngrade           = errors.New("etcdserver: no inflight downgrade job")
+)
+
+type DiscoveryError struct {
+	Op  string
+	Err error
+}
+
+func (e DiscoveryError) Error() string {
+	return fmt.Sprintf("failed to %s discovery cluster (%v)", e.Op, e.Err)
+}