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package praefect
import (
"context"
"fmt"
"net"
"testing"
"time"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/protoc-gen-go/descriptor"
"github.com/sirupsen/logrus"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/client"
internalauth "gitlab.com/gitlab-org/gitaly/internal/gitaly/config/auth"
"gitlab.com/gitlab-org/gitaly/internal/gitaly/server/auth"
"gitlab.com/gitlab-org/gitaly/internal/log"
"gitlab.com/gitlab-org/gitaly/internal/praefect/config"
"gitlab.com/gitlab-org/gitaly/internal/praefect/datastore"
"gitlab.com/gitlab-org/gitaly/internal/praefect/grpc-proxy/proxy"
"gitlab.com/gitlab-org/gitaly/internal/praefect/mock"
"gitlab.com/gitlab-org/gitaly/internal/praefect/nodes"
"gitlab.com/gitlab-org/gitaly/internal/praefect/protoregistry"
"gitlab.com/gitlab-org/gitaly/internal/praefect/transactions"
"gitlab.com/gitlab-org/gitaly/internal/testhelper"
"gitlab.com/gitlab-org/gitaly/internal/testhelper/promtest"
correlation "gitlab.com/gitlab-org/labkit/correlation/grpc"
"google.golang.org/grpc"
"google.golang.org/grpc/health"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
)
// generates a praefect configuration with the specified number of backend
// nodes
func testConfig(backends int) config.Config {
var nodes []*config.Node
for i := 0; i < backends; i++ {
n := &config.Node{
Storage: fmt.Sprintf("praefect-internal-%d", i),
Token: fmt.Sprintf("%d", i),
}
nodes = append(nodes, n)
}
cfg := config.Config{
VirtualStorages: []*config.VirtualStorage{
&config.VirtualStorage{
Name: "praefect",
Nodes: nodes,
},
},
}
return cfg
}
func noopBackoffFunc() (backoff, backoffReset) {
return func() time.Duration {
return 0
}, func() {}
}
type nullNodeMgr struct{}
func (nullNodeMgr) GetShard(ctx context.Context, virtualStorageName string) (nodes.Shard, error) {
return nodes.Shard{Primary: &nodes.MockNode{}}, nil
}
func (nullNodeMgr) GetSyncedNode(ctx context.Context, virtualStorageName, repoPath string) (nodes.Node, error) {
return nil, nil
}
func (nullNodeMgr) HealthyNodes() map[string][]string {
return nil
}
func (nullNodeMgr) Nodes() map[string][]nodes.Node {
return nil
}
type buildOptions struct {
withQueue datastore.ReplicationEventQueue
withTxMgr *transactions.Manager
withBackends func([]*config.VirtualStorage) []testhelper.Cleanup
withAnnotations *protoregistry.Registry
withLogger *logrus.Entry
withNodeMgr nodes.Manager
withRepoStore datastore.RepositoryStore
}
func withMockBackends(t testing.TB, backends map[string]mock.SimpleServiceServer) func([]*config.VirtualStorage) []testhelper.Cleanup {
return func(virtualStorages []*config.VirtualStorage) []testhelper.Cleanup {
var cleanups []testhelper.Cleanup
for _, vs := range virtualStorages {
require.Equal(t, len(backends), len(vs.Nodes),
"mock server count doesn't match config nodes")
for i, node := range vs.Nodes {
backend, ok := backends[node.Storage]
require.True(t, ok, "missing backend server for node %s", node.Storage)
backendAddr, cleanup := newMockDownstream(t, node.Token, backend)
cleanups = append(cleanups, cleanup)
node.Address = backendAddr
vs.Nodes[i] = node
}
}
return cleanups
}
}
func defaultQueue(conf config.Config) datastore.ReplicationEventQueue {
return datastore.NewMemoryReplicationEventQueue(conf)
}
func defaultTxMgr(conf config.Config) *transactions.Manager {
return transactions.NewManager(conf)
}
func defaultNodeMgr(t testing.TB, conf config.Config, rs datastore.RepositoryStore) nodes.Manager {
nodeMgr, err := nodes.NewManager(testhelper.DiscardTestEntry(t), conf, nil, rs, promtest.NewMockHistogramVec(), protoregistry.GitalyProtoPreregistered, nil)
require.NoError(t, err)
nodeMgr.Start(0, time.Hour)
return nodeMgr
}
func defaultRepoStore(conf config.Config) datastore.RepositoryStore {
return datastore.MockRepositoryStore{}
}
func runPraefectServer(t testing.TB, conf config.Config, opt buildOptions) (*grpc.ClientConn, *grpc.Server, testhelper.Cleanup) {
var cleanups []testhelper.Cleanup
if opt.withQueue == nil {
opt.withQueue = defaultQueue(conf)
}
if opt.withRepoStore == nil {
opt.withRepoStore = defaultRepoStore(conf)
}
if opt.withTxMgr == nil {
opt.withTxMgr = defaultTxMgr(conf)
}
if opt.withBackends != nil {
cleanups = append(cleanups, opt.withBackends(conf.VirtualStorages)...)
}
if opt.withAnnotations == nil {
opt.withAnnotations = protoregistry.GitalyProtoPreregistered
}
if opt.withLogger == nil {
opt.withLogger = log.Default()
}
if opt.withNodeMgr == nil {
opt.withNodeMgr = defaultNodeMgr(t, conf, opt.withRepoStore)
}
coordinator := NewCoordinator(
opt.withQueue,
opt.withRepoStore,
NewNodeManagerRouter(opt.withNodeMgr, opt.withRepoStore),
opt.withTxMgr,
conf,
opt.withAnnotations,
)
// TODO: run a replmgr for EVERY virtual storage
replmgr := NewReplMgr(
opt.withLogger,
conf.VirtualStorageNames(),
opt.withQueue,
opt.withRepoStore,
opt.withNodeMgr,
NodeSetFromNodeManager(opt.withNodeMgr),
)
prf := NewGRPCServer(conf, opt.withLogger, protoregistry.GitalyProtoPreregistered, coordinator.StreamDirector, opt.withNodeMgr, opt.withTxMgr, opt.withQueue, opt.withRepoStore, nil)
listener, port := listenAvailPort(t)
errQ := make(chan error)
ctx, cancel := testhelper.Context()
go func() { errQ <- prf.Serve(listener) }()
go replmgr.ProcessBacklog(ctx, noopBackoffFunc)
// dial client to praefect
cc := dialLocalPort(t, port, false)
cleanup := func() {
for _, cu := range cleanups {
cu()
}
prf.Stop()
cancel()
require.NoError(t, <-errQ)
}
return cc, prf, cleanup
}
func mustLoadProtoReg(t testing.TB) *descriptor.FileDescriptorProto {
fd, err := protoregistry.ExtractFileDescriptor(proto.FileDescriptor("praefect/mock/mock.proto"))
require.NoError(t, err)
return fd
}
func listenAvailPort(tb testing.TB) (net.Listener, int) {
listener, err := net.Listen("tcp", "localhost:0")
require.NoError(tb, err)
return listener, listener.Addr().(*net.TCPAddr).Port
}
func dialLocalPort(tb testing.TB, port int, backend bool) *grpc.ClientConn {
opts := []grpc.DialOption{
grpc.WithBlock(),
grpc.WithUnaryInterceptor(correlation.UnaryClientCorrelationInterceptor()),
grpc.WithStreamInterceptor(correlation.StreamClientCorrelationInterceptor()),
}
if backend {
opts = append(
opts,
grpc.WithDefaultCallOptions(grpc.ForceCodec(proxy.NewCodec())),
)
}
cc, err := client.Dial(
fmt.Sprintf("tcp://localhost:%d", port),
opts,
)
require.NoError(tb, err)
return cc
}
func newMockDownstream(tb testing.TB, token string, m mock.SimpleServiceServer) (string, func()) {
srv := grpc.NewServer(grpc.UnaryInterceptor(auth.UnaryServerInterceptor(internalauth.Config{Token: token})))
mock.RegisterSimpleServiceServer(srv, m)
healthpb.RegisterHealthServer(srv, health.NewServer())
// client to backend service
lis, port := listenAvailPort(tb)
errQ := make(chan error)
go func() {
errQ <- srv.Serve(lis)
}()
cleanup := func() {
srv.GracefulStop()
lis.Close()
// If the server is shutdown before Serve() is called on it
// the Serve() calls will return the ErrServerStopped
if err := <-errQ; err != nil && err != grpc.ErrServerStopped {
require.NoError(tb, err)
}
}
return fmt.Sprintf("tcp://localhost:%d", port), cleanup
}
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