105 lines
2.0 KiB
Go
105 lines
2.0 KiB
Go
// +build kvdb_etcd
|
|
|
|
package cluster
|
|
|
|
import (
|
|
"context"
|
|
"io/ioutil"
|
|
"os"
|
|
"runtime/pprof"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/lightningnetwork/lnd/channeldb/kvdb/etcd"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
// GuardTimeout implements a test level timeout guard.
|
|
func GuardTimeout(t *testing.T, timeout time.Duration) func() {
|
|
done := make(chan struct{})
|
|
go func() {
|
|
select {
|
|
case <-time.After(timeout):
|
|
err := pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
|
|
require.NoError(t, err)
|
|
panic("test timeout")
|
|
|
|
case <-done:
|
|
}
|
|
}()
|
|
|
|
return func() {
|
|
close(done)
|
|
}
|
|
}
|
|
|
|
// TestEtcdElector tests that two candidates competing for leadership works as
|
|
// expected and that elected leader can resign and allow others to take on.
|
|
func TestEtcdElector(t *testing.T) {
|
|
guard := GuardTimeout(t, 5*time.Second)
|
|
defer guard()
|
|
|
|
tmpDir, err := ioutil.TempDir("", "etcd")
|
|
if err != nil {
|
|
t.Fatalf("unable to create temp dir: %v", err)
|
|
}
|
|
|
|
etcdCfg, cleanup, err := etcd.NewEmbeddedEtcdInstance(tmpDir, 0, 0)
|
|
require.NoError(t, err)
|
|
defer cleanup()
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
const (
|
|
election = "/election/"
|
|
id1 = "e1"
|
|
id2 = "e2"
|
|
)
|
|
|
|
e1, err := newEtcdLeaderElector(
|
|
ctx, id1, election, etcdCfg,
|
|
)
|
|
require.NoError(t, err)
|
|
|
|
e2, err := newEtcdLeaderElector(
|
|
ctx, id2, election, etcdCfg,
|
|
)
|
|
require.NoError(t, err)
|
|
|
|
var wg sync.WaitGroup
|
|
ch := make(chan *etcdLeaderElector)
|
|
|
|
wg.Add(2)
|
|
ctxb := context.Background()
|
|
|
|
go func() {
|
|
defer wg.Done()
|
|
require.NoError(t, e1.Campaign(ctxb))
|
|
ch <- e1
|
|
}()
|
|
|
|
go func() {
|
|
defer wg.Done()
|
|
require.NoError(t, e2.Campaign(ctxb))
|
|
ch <- e2
|
|
}()
|
|
|
|
tmp := <-ch
|
|
first, err := tmp.Leader(ctxb)
|
|
require.NoError(t, err)
|
|
require.NoError(t, tmp.Resign())
|
|
|
|
tmp = <-ch
|
|
second, err := tmp.Leader(ctxb)
|
|
require.NoError(t, err)
|
|
require.NoError(t, tmp.Resign())
|
|
|
|
require.Contains(t, []string{id1, id2}, first)
|
|
require.Contains(t, []string{id1, id2}, second)
|
|
require.NotEqual(t, first, second)
|
|
|
|
wg.Wait()
|
|
}
|