mirror of
https://github.com/etcd-io/etcd.git
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604bc04f70
Added IsLearner field to etcdserver internal Member type. Routed learner MemberAdd request from server API to raft. Apply learner MemberAdd result to server after the request is passed through Raft.
133 lines
3.6 KiB
Go
133 lines
3.6 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 membership
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import (
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"crypto/sha1"
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"encoding/binary"
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"fmt"
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"math/rand"
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"sort"
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"time"
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"github.com/coreos/pkg/capnslog"
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"go.etcd.io/etcd/v3/pkg/types"
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)
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var (
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plog = capnslog.NewPackageLogger("go.etcd.io/etcd/v3", "etcdserver/membership")
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)
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// RaftAttributes represents the raft related attributes of an etcd member.
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type RaftAttributes struct {
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// PeerURLs is the list of peers in the raft cluster.
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// TODO(philips): ensure these are URLs
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PeerURLs []string `json:"peerURLs"`
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// IsLearner indicates if the member is raft learner.
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IsLearner bool `json:"isLearner,omitempty"`
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}
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// Attributes represents all the non-raft related attributes of an etcd member.
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type Attributes struct {
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Name string `json:"name,omitempty"`
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ClientURLs []string `json:"clientURLs,omitempty"`
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}
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type Member struct {
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ID types.ID `json:"id"`
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RaftAttributes
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Attributes
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}
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// NewMember creates a Member without an ID and generates one based on the
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// cluster name, peer URLs, and time. This is used for bootstrapping/adding new member.
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func NewMember(name string, peerURLs types.URLs, clusterName string, now *time.Time, isLearner bool) *Member {
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m := &Member{
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RaftAttributes: RaftAttributes{
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PeerURLs: peerURLs.StringSlice(),
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IsLearner: isLearner,
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},
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Attributes: Attributes{Name: name},
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}
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var b []byte
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sort.Strings(m.PeerURLs)
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for _, p := range m.PeerURLs {
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b = append(b, []byte(p)...)
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}
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b = append(b, []byte(clusterName)...)
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if now != nil {
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b = append(b, []byte(fmt.Sprintf("%d", now.Unix()))...)
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}
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hash := sha1.Sum(b)
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m.ID = types.ID(binary.BigEndian.Uint64(hash[:8]))
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return m
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}
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// PickPeerURL chooses a random address from a given Member's PeerURLs.
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// It will panic if there is no PeerURLs available in Member.
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func (m *Member) PickPeerURL() string {
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if len(m.PeerURLs) == 0 {
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panic("member should always have some peer url")
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}
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return m.PeerURLs[rand.Intn(len(m.PeerURLs))]
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}
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func (m *Member) Clone() *Member {
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if m == nil {
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return nil
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}
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mm := &Member{
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ID: m.ID,
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RaftAttributes: RaftAttributes{
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IsLearner: m.IsLearner,
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},
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Attributes: Attributes{
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Name: m.Name,
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},
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}
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if m.PeerURLs != nil {
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mm.PeerURLs = make([]string, len(m.PeerURLs))
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copy(mm.PeerURLs, m.PeerURLs)
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}
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if m.ClientURLs != nil {
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mm.ClientURLs = make([]string, len(m.ClientURLs))
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copy(mm.ClientURLs, m.ClientURLs)
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}
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return mm
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}
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func (m *Member) IsStarted() bool {
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return len(m.Name) != 0
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}
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// MembersByID implements sort by ID interface
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type MembersByID []*Member
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func (ms MembersByID) Len() int { return len(ms) }
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func (ms MembersByID) Less(i, j int) bool { return ms[i].ID < ms[j].ID }
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func (ms MembersByID) Swap(i, j int) { ms[i], ms[j] = ms[j], ms[i] }
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// MembersByPeerURLs implements sort by peer urls interface
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type MembersByPeerURLs []*Member
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func (ms MembersByPeerURLs) Len() int { return len(ms) }
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func (ms MembersByPeerURLs) Less(i, j int) bool {
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return ms[i].PeerURLs[0] < ms[j].PeerURLs[0]
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}
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func (ms MembersByPeerURLs) Swap(i, j int) { ms[i], ms[j] = ms[j], ms[i] }
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