1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
package handler
import (
"context"
"fmt"
"os"
"strings"
log "github.com/sirupsen/logrus"
gitalyauth "gitlab.com/gitlab-org/gitaly/auth"
"gitlab.com/gitlab-org/gitaly/client"
pb "gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"gitlab.com/gitlab-org/gitlab-shell/internal/config"
"gitlab.com/gitlab-org/gitlab-shell/internal/executable"
"gitlab.com/gitlab-org/gitlab-shell/internal/gitlabnet/accessverifier"
grpccorrelation "gitlab.com/gitlab-org/labkit/correlation/grpc"
"gitlab.com/gitlab-org/labkit/tracing"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
// GitalyHandlerFunc implementations are responsible for making
// an appropriate Gitaly call using the provided client and context
// and returning an error from the Gitaly call.
type GitalyHandlerFunc func(ctx context.Context, client *grpc.ClientConn) (int32, error)
type GitalyConn struct {
ctx context.Context
conn *grpc.ClientConn
close func()
}
type GitalyCommand struct {
Config *config.Config
ServiceName string
Address string
Token string
Features map[string]string
}
// RunGitalyCommand provides a bootstrap for Gitaly commands executed
// through GitLab-Shell. It ensures that logging, tracing and other
// common concerns are configured before executing the `handler`.
func (gc *GitalyCommand) RunGitalyCommand(handler GitalyHandlerFunc) error {
gitalyConn, err := getConn(gc)
if err != nil {
return err
}
_, err = handler(gitalyConn.ctx, gitalyConn.conn)
gitalyConn.close()
return err
}
func (gc *GitalyCommand) LogExecution(repository *pb.Repository, response *accessverifier.Response, protocol string) {
fields := log.Fields{
"command": gc.ServiceName,
"gl_project_path": repository.GlProjectPath,
"gl_repository": repository.GlRepository,
"user_id": response.UserId,
"username": response.Username,
"git_protocol": protocol,
}
log.WithFields(fields).Info("executing git command")
}
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 getConn(gc *GitalyCommand) (*GitalyConn, error) {
if gc.Address == "" {
return nil, fmt.Errorf("no gitaly_address given")
}
connOpts := client.DefaultDialOpts
if gc.Token != "" {
connOpts = append(client.DefaultDialOpts,
grpc.WithPerRPCCredentials(gitalyauth.RPCCredentialsV2(gc.Token)),
grpc.WithStreamInterceptor(
grpccorrelation.StreamClientCorrelationInterceptor(
grpccorrelation.WithClientName(executable.GitlabShell),
),
),
grpc.WithUnaryInterceptor(
grpccorrelation.UnaryClientCorrelationInterceptor(
grpccorrelation.WithClientName(executable.GitlabShell),
),
),
)
}
// Use a working directory that won't get removed or unmounted.
if err := os.Chdir("/"); err != nil {
return nil, err
}
// Configure distributed tracing
serviceName := fmt.Sprintf("gitlab-shell-%v", gc.ServiceName)
closer := tracing.Initialize(
tracing.WithServiceName(serviceName),
// For GitLab-Shell, we explicitly initialize tracing from a config file
// instead of the default environment variable (using GITLAB_TRACING)
// This decision was made owing to the difficulty in passing environment
// variables into GitLab-Shell processes.
//
// Processes are spawned as children of the SSH daemon, which tightly
// controls environment variables; doing this means we don't have to
// enable PermitUserEnvironment
tracing.WithConnectionString(gc.Config.GitlabTracing),
)
ctx, finished := tracing.ExtractFromEnv(context.Background())
ctx = withOutgoingMetadata(ctx, gc.Features)
conn, err := client.Dial(gc.Address, connOpts)
if err != nil {
return nil, err
}
finish := func() {
finished()
closer.Close()
conn.Close()
}
return &GitalyConn{ctx: ctx, conn: conn, close: finish}, nil
}
|