mirror of
https://github.com/etcd-io/etcd.git
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306e75a96f
Verifiy the behavior in various v1 and v2 conf change operations. This also includes various fixups, notably it adds protection against transitioning in and out of new configs when this is not permissible. There are more threads to pull, but those are left for future commits.
95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
// Copyright 2019 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 rafttest
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import (
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"testing"
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"github.com/cockroachdb/datadriven"
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"go.etcd.io/etcd/raft"
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"go.etcd.io/etcd/raft/raftpb"
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)
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func (env *InteractionEnv) handleProcessReady(t *testing.T, d datadriven.TestData) error {
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idx := firstAsNodeIdx(t, d)
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return env.ProcessReady(idx)
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}
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// ProcessReady runs Ready handling on the node with the given index.
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func (env *InteractionEnv) ProcessReady(idx int) error {
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// TODO(tbg): Allow simulating crashes here.
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rn, s := env.Nodes[idx].RawNode, env.Nodes[idx].Storage
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rd := rn.Ready()
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// TODO(tbg): the order of operations here is not necessarily safe. See:
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// https://github.com/etcd-io/etcd/pull/10861
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if !raft.IsEmptyHardState(rd.HardState) {
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if err := s.SetHardState(rd.HardState); err != nil {
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return err
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}
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}
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if err := s.Append(rd.Entries); err != nil {
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return err
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}
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if !raft.IsEmptySnap(rd.Snapshot) {
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if err := s.ApplySnapshot(rd.Snapshot); err != nil {
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return err
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}
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}
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for _, ent := range rd.CommittedEntries {
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var update []byte
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var cs *raftpb.ConfState
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switch ent.Type {
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case raftpb.EntryConfChange:
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var cc raftpb.ConfChange
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if err := cc.Unmarshal(ent.Data); err != nil {
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return err
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}
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update = cc.Context
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cs = rn.ApplyConfChange(cc)
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case raftpb.EntryConfChangeV2:
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var cc raftpb.ConfChangeV2
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if err := cc.Unmarshal(ent.Data); err != nil {
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return err
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}
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cs = rn.ApplyConfChange(cc)
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update = cc.Context
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default:
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update = ent.Data
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}
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// Record the new state by starting with the current state and applying
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// the command.
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lastSnap := env.Nodes[idx].History[len(env.Nodes[idx].History)-1]
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var snap raftpb.Snapshot
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snap.Data = append(snap.Data, lastSnap.Data...)
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// NB: this hard-codes an "appender" state machine.
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snap.Data = append(snap.Data, update...)
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snap.Metadata.Index = ent.Index
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snap.Metadata.Term = ent.Term
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if cs == nil {
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sl := env.Nodes[idx].History
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cs = &sl[len(sl)-1].Metadata.ConfState
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}
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snap.Metadata.ConfState = *cs
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env.Nodes[idx].History = append(env.Nodes[idx].History, snap)
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}
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for _, msg := range rd.Messages {
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env.Messages = append(env.Messages, msg)
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}
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rn.Advance(rd)
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env.Output.WriteString(raft.DescribeReady(rd, defaultEntryFormatter))
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return nil
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}
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