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https://github.com/etcd-io/etcd.git
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f6cd4d4f5b
Computing the snapshot file path is error prone; snapshot recovery was constructing file paths missing a path separator so the snapshot would never be loaded. Instead, refactor the backend path handling to use helper functions where possible.
98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package etcdserver
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import (
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"time"
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"github.com/coreos/etcd/etcdserver/membership"
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"github.com/coreos/etcd/pkg/types"
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"github.com/coreos/etcd/rafthttp"
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)
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// isConnectedToQuorumSince checks whether the local member is connected to the
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// quorum of the cluster since the given time.
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func isConnectedToQuorumSince(transport rafthttp.Transporter, since time.Time, self types.ID, members []*membership.Member) bool {
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return numConnectedSince(transport, since, self, members) >= (len(members)/2)+1
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}
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// isConnectedSince checks whether the local member is connected to the
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// remote member since the given time.
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func isConnectedSince(transport rafthttp.Transporter, since time.Time, remote types.ID) bool {
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t := transport.ActiveSince(remote)
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return !t.IsZero() && t.Before(since)
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}
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// isConnectedFullySince checks whether the local member is connected to all
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// members in the cluster since the given time.
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func isConnectedFullySince(transport rafthttp.Transporter, since time.Time, self types.ID, members []*membership.Member) bool {
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return numConnectedSince(transport, since, self, members) == len(members)
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}
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// numConnectedSince counts how many members are connected to the local member
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// since the given time.
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func numConnectedSince(transport rafthttp.Transporter, since time.Time, self types.ID, members []*membership.Member) int {
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connectedNum := 0
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for _, m := range members {
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if m.ID == self || isConnectedSince(transport, since, m.ID) {
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connectedNum++
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}
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}
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return connectedNum
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}
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// longestConnected chooses the member with longest active-since-time.
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// It returns false, if nothing is active.
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func longestConnected(tp rafthttp.Transporter, membs []types.ID) (types.ID, bool) {
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var longest types.ID
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var oldest time.Time
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for _, id := range membs {
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tm := tp.ActiveSince(id)
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if tm.IsZero() { // inactive
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continue
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}
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if oldest.IsZero() { // first longest candidate
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oldest = tm
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longest = id
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}
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if tm.Before(oldest) {
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oldest = tm
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longest = id
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}
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}
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if uint64(longest) == 0 {
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return longest, false
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}
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return longest, true
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}
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type notifier struct {
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c chan struct{}
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err error
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}
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func newNotifier() *notifier {
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return ¬ifier{
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c: make(chan struct{}),
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}
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}
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func (nc *notifier) notify(err error) {
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nc.err = err
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close(nc.c)
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}
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