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package gitaly
import (
"context"
"strings"
"sync"
"github.com/golang/protobuf/jsonpb" //lint:ignore SA1019 https://gitlab.com/gitlab-org/gitlab-workhorse/-/issues/274
"github.com/golang/protobuf/proto" //lint:ignore SA1019 https://gitlab.com/gitlab-org/gitlab-workhorse/-/issues/274
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
gitalyauth "gitlab.com/gitlab-org/gitaly/v14/auth"
gitalyclient "gitlab.com/gitlab-org/gitaly/v14/client"
"gitlab.com/gitlab-org/gitaly/v14/proto/go/gitalypb"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
grpccorrelation "gitlab.com/gitlab-org/labkit/correlation/grpc"
grpctracing "gitlab.com/gitlab-org/labkit/tracing/grpc"
)
type Server struct {
Address string `json:"address"`
Token string `json:"token"`
Features map[string]string `json:"features"`
}
type cacheKey struct{ address, token string }
func (server Server) cacheKey() cacheKey {
return cacheKey{address: server.Address, token: server.Token}
}
type connectionsCache struct {
sync.RWMutex
connections map[cacheKey]*grpc.ClientConn
}
var (
jsonUnMarshaler = jsonpb.Unmarshaler{AllowUnknownFields: true}
cache = connectionsCache{
connections: make(map[cacheKey]*grpc.ClientConn),
}
connectionsTotal = promauto.NewCounterVec(
prometheus.CounterOpts{
Name: "gitlab_workhorse_gitaly_connections_total",
Help: "Number of Gitaly connections that have been established",
},
[]string{"status"},
)
)
func withOutgoingMetadata(ctx context.Context, features map[string]string) context.Context {
md := metadata.New(nil)
for k, v := range features {
if !strings.HasPrefix(k, "gitaly-feature-") {
continue
}
md.Append(k, v)
}
return metadata.NewOutgoingContext(ctx, md)
}
func NewSmartHTTPClient(ctx context.Context, server Server) (context.Context, *SmartHTTPClient, error) {
conn, err := getOrCreateConnection(server)
if err != nil {
return nil, nil, err
}
grpcClient := gitalypb.NewSmartHTTPServiceClient(conn)
return withOutgoingMetadata(ctx, server.Features), &SmartHTTPClient{grpcClient}, nil
}
func NewBlobClient(ctx context.Context, server Server) (context.Context, *BlobClient, error) {
conn, err := getOrCreateConnection(server)
if err != nil {
return nil, nil, err
}
grpcClient := gitalypb.NewBlobServiceClient(conn)
return withOutgoingMetadata(ctx, server.Features), &BlobClient{grpcClient}, nil
}
func NewRepositoryClient(ctx context.Context, server Server) (context.Context, *RepositoryClient, error) {
conn, err := getOrCreateConnection(server)
if err != nil {
return nil, nil, err
}
grpcClient := gitalypb.NewRepositoryServiceClient(conn)
return withOutgoingMetadata(ctx, server.Features), &RepositoryClient{grpcClient}, nil
}
// NewNamespaceClient is only used by the Gitaly integration tests at present
func NewNamespaceClient(ctx context.Context, server Server) (context.Context, *NamespaceClient, error) {
conn, err := getOrCreateConnection(server)
if err != nil {
return nil, nil, err
}
grpcClient := gitalypb.NewNamespaceServiceClient(conn)
return withOutgoingMetadata(ctx, server.Features), &NamespaceClient{grpcClient}, nil
}
func NewDiffClient(ctx context.Context, server Server) (context.Context, *DiffClient, error) {
conn, err := getOrCreateConnection(server)
if err != nil {
return nil, nil, err
}
grpcClient := gitalypb.NewDiffServiceClient(conn)
return withOutgoingMetadata(ctx, server.Features), &DiffClient{grpcClient}, nil
}
func getOrCreateConnection(server Server) (*grpc.ClientConn, error) {
key := server.cacheKey()
cache.RLock()
conn := cache.connections[key]
cache.RUnlock()
if conn != nil {
return conn, nil
}
cache.Lock()
defer cache.Unlock()
if conn := cache.connections[key]; conn != nil {
return conn, nil
}
conn, err := newConnection(server)
if err != nil {
return nil, err
}
cache.connections[key] = conn
return conn, nil
}
func CloseConnections() {
cache.Lock()
defer cache.Unlock()
for _, conn := range cache.connections {
conn.Close()
}
}
func newConnection(server Server) (*grpc.ClientConn, error) {
connOpts := append(gitalyclient.DefaultDialOpts,
grpc.WithPerRPCCredentials(gitalyauth.RPCCredentialsV2(server.Token)),
grpc.WithStreamInterceptor(
grpc_middleware.ChainStreamClient(
grpctracing.StreamClientTracingInterceptor(),
grpc_prometheus.StreamClientInterceptor,
grpccorrelation.StreamClientCorrelationInterceptor(
grpccorrelation.WithClientName("gitlab-workhorse"),
),
),
),
grpc.WithUnaryInterceptor(
grpc_middleware.ChainUnaryClient(
grpctracing.UnaryClientTracingInterceptor(),
grpc_prometheus.UnaryClientInterceptor,
grpccorrelation.UnaryClientCorrelationInterceptor(
grpccorrelation.WithClientName("gitlab-workhorse"),
),
),
),
)
conn, connErr := gitalyclient.Dial(server.Address, connOpts)
label := "ok"
if connErr != nil {
label = "fail"
}
connectionsTotal.WithLabelValues(label).Inc()
return conn, connErr
}
func UnmarshalJSON(s string, msg proto.Message) error {
return jsonUnMarshaler.Unmarshal(strings.NewReader(s), msg)
}
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