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https://github.com/etcd-io/etcd.git
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078caccce5
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
2.5 KiB
Go
95 lines
2.5 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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"bufio"
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"fmt"
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"strings"
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"testing"
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"github.com/cockroachdb/datadriven"
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"go.etcd.io/etcd/raft/raftpb"
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)
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func (env *InteractionEnv) handleStabilize(t *testing.T, d datadriven.TestData) error {
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var idxs []int
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for _, id := range ints(t, d) {
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idxs = append(idxs, id-1)
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}
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return env.Stabilize(idxs...)
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}
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// Stabilize repeatedly runs Ready handling on and message delivery to the set
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// of nodes specified via the idxs slice until reaching a fixed point.
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func (env *InteractionEnv) Stabilize(idxs ...int) error {
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var nodes []Node
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for _, idx := range idxs {
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nodes = append(nodes, env.Nodes[idx])
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}
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if len(nodes) == 0 {
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nodes = env.Nodes
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}
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withIndent := func(f func()) {
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orig := env.Output.Builder
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env.Output.Builder = &strings.Builder{}
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f()
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scanner := bufio.NewScanner(strings.NewReader(env.Output.Builder.String()))
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for scanner.Scan() {
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orig.WriteString(" " + scanner.Text() + "\n")
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}
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env.Output.Builder = orig
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}
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for {
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done := true
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for _, rn := range nodes {
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if rn.HasReady() {
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done = false
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idx := int(rn.Status().ID - 1)
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fmt.Fprintf(env.Output, "> %d handling Ready\n", idx+1)
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withIndent(func() { env.ProcessReady(idx) })
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}
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}
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for _, rn := range nodes {
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id := rn.Status().ID
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// NB: we grab the messages just to see whether to print the header.
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// DeliverMsgs will do it again.
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if msgs, _ := splitMsgs(env.Messages, id); len(msgs) > 0 {
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fmt.Fprintf(env.Output, "> %d receiving messages\n", id)
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withIndent(func() { env.DeliverMsgs(Recipient{ID: id}) })
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done = false
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}
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}
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if done {
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return nil
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}
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}
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}
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func splitMsgs(msgs []raftpb.Message, to uint64) (toMsgs []raftpb.Message, rmdr []raftpb.Message) {
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// NB: this method does not reorder messages.
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for _, msg := range msgs {
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if msg.To == to {
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toMsgs = append(toMsgs, msg)
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} else {
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rmdr = append(rmdr, msg)
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}
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}
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return toMsgs, rmdr
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}
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