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util_cluster.go
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/
util_cluster.go
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// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package acceptance
import (
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"testing"
"time"
"golang.org/x/net/context"
gosql "database/sql"
"github.com/cockroachdb/cockroach/pkg/acceptance/cluster"
"github.com/cockroachdb/cockroach/pkg/acceptance/localcluster"
"github.com/cockroachdb/cockroach/pkg/keys"
"github.com/cockroachdb/cockroach/pkg/roachpb"
"github.com/cockroachdb/cockroach/pkg/testutils"
"github.com/cockroachdb/cockroach/pkg/util/log"
"github.com/pkg/errors"
)
const (
localTest = "runMode=local"
dockerTest = "runMode=docker"
farmerTest = "runMode=farmer"
)
// RunLocal runs the given acceptance test using a bare cluster.
func RunLocal(t *testing.T, testee func(t *testing.T)) {
t.Run(localTest, testee)
}
// RunDocker runs the given acceptance test using a Docker cluster.
func RunDocker(t *testing.T, testee func(t *testing.T)) {
t.Run(dockerTest, testee)
}
// RunTerraform runs the given acceptance test using a terraform cluster.
func RunTerraform(t *testing.T, testee func(t *testing.T)) {
t.Run(farmerTest, testee)
}
var _ = RunTerraform // silence unused warning
// turns someTest#123 into someTest when invoked with ReplicaAllLiteralString.
// This is useful because the go test harness automatically disambiguates
// subtests in that way when they are invoked multiple times with the same name,
// and we sometimes call RunDocker multiple times in tests.
var reStripTestEnumeration = regexp.MustCompile(`#\d+$`)
// runTestWithCluster runs the passed in test against the configuration
// specified by the flags. If any options are specified, they may mutate the
// test config before it runs.
func runTestWithCluster(
t *testing.T,
testFunc func(context.Context, *testing.T, cluster.Cluster, cluster.TestConfig),
options ...func(*cluster.TestConfig),
) {
cfg := readConfigFromFlags()
ctx := context.Background()
for _, opt := range options {
opt(&cfg)
}
cluster := StartCluster(ctx, t, cfg)
log.Infof(ctx, "cluster started successfully")
defer cluster.AssertAndStop(ctx, t)
testFunc(ctx, t, cluster, cfg)
}
// StartCluster starts a cluster from the relevant flags. All test clusters
// should be created through this command since it sets up the logging in a
// unified way.
func StartCluster(ctx context.Context, t *testing.T, cfg cluster.TestConfig) (c cluster.Cluster) {
var completed bool
defer func() {
if !completed && c != nil {
c.AssertAndStop(ctx, t)
}
}()
if *flagRemote { // force the test remote, no matter what run mode we think it should be run in
f := MakeFarmer(t, "", stopper)
c = f
if err := f.Resize(*flagNodes); err != nil {
t.Fatal(err)
}
if err := f.WaitReady(5 * time.Minute); err != nil {
if destroyErr := f.Destroy(t); destroyErr != nil {
t.Fatalf("could not destroy cluster after error %s: %s", err, destroyErr)
}
t.Fatalf("cluster not ready in time: %s", err)
}
} else {
parts := strings.Split(t.Name(), "/")
if len(parts) < 2 {
t.Fatal("must invoke RunLocal, RunDocker, or RunFarmer")
}
var runMode string
for _, part := range parts[1:] {
part = reStripTestEnumeration.ReplaceAllLiteralString(part, "")
switch part {
case localTest:
fallthrough
case dockerTest:
fallthrough
case farmerTest:
if runMode != "" {
t.Fatalf("test has more than one run mode: %s and %s", runMode, part)
}
runMode = part
}
}
switch runMode {
case localTest:
pwd, err := os.Getwd()
if err != nil {
t.Fatal(err)
}
dataDir, err := ioutil.TempDir(pwd, ".localcluster")
if err != nil {
t.Fatal(err)
}
logDir := *flagLogDir
if logDir != "" {
logDir = filepath.Join(logDir, filepath.Clean(t.Name()))
}
perNodeCfg := map[int]localcluster.NodeConfig{}
for i := 0; i < len(cfg.Nodes); i++ {
// TODO(tschottdorf): handle Nodes[i].Stores properly.
if cfg.Nodes[i].Version != "" {
var err error
var nCfg localcluster.NodeConfig
nCfg.Binary, err = fetchAndCacheBinary(ctx, ".localcluster_cache", cfg.Nodes[i].Version)
if err != nil {
t.Fatalf("unable to set up binary for v%s: %s", cfg.Nodes[i].Version, err)
}
perNodeCfg[i] = nCfg
}
}
clusterCfg := localcluster.ClusterConfig{
Ephemeral: true,
DataDir: dataDir,
LogDir: logDir,
NumNodes: len(cfg.Nodes),
PerNodeCfg: perNodeCfg,
}
l := localcluster.New(clusterCfg)
l.Start(ctx)
c = &localcluster.LocalCluster{Cluster: l}
case dockerTest:
logDir := *flagLogDir
if logDir != "" {
logDir = filepath.Join(logDir, filepath.Clean(t.Name()))
}
l := cluster.CreateDocker(ctx, cfg, logDir, stopper)
l.Start(ctx)
c = l
default:
t.Fatalf("unable to run in mode %q, use either RunLocal, RunDocker, or RunFarmer", runMode)
}
}
if cfg.InitMode != cluster.INIT_NONE {
wantedReplicas := 3
if numNodes := c.NumNodes(); numNodes < wantedReplicas {
wantedReplicas = numNodes
}
// Looks silly, but we actually start zero-node clusters in the
// reference tests.
if wantedReplicas > 0 {
log.Infof(ctx, "waiting for first range to have %d replicas", wantedReplicas)
testutils.SucceedsSoon(t, func() error {
select {
case <-stopper.ShouldStop():
t.Fatal("interrupted")
case <-time.After(time.Second):
}
// Reconnect on every iteration; gRPC will eagerly tank the connection
// on transport errors. Always talk to node 0 because it's guaranteed
// to exist.
client, err := c.NewClient(ctx, 0)
if err != nil {
t.Fatal(err)
}
var desc roachpb.RangeDescriptor
if err := client.GetProto(ctx, keys.RangeDescriptorKey(roachpb.RKeyMin), &desc); err != nil {
return err
}
foundReplicas := len(desc.Replicas)
if log.V(1) {
log.Infof(ctx, "found %d replicas", foundReplicas)
}
if foundReplicas < wantedReplicas {
return errors.Errorf("expected %d replicas, only found %d", wantedReplicas, foundReplicas)
}
return nil
})
}
// Ensure that all nodes are serving SQL by making sure a simple
// read-only query succeeds.
for i := 0; i < c.NumNodes(); i++ {
testutils.SucceedsSoon(t, func() error {
db, err := gosql.Open("postgres", c.PGUrl(ctx, i))
if err != nil {
return err
}
if _, err := db.Exec("SHOW DATABASES;"); err != nil {
return err
}
return nil
})
}
}
completed = true
return c
}