/
portforwarder.go
234 lines (200 loc) · 5.78 KB
/
portforwarder.go
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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
package client
import (
"fmt"
"io"
"io/ioutil"
"math/rand"
"net/http"
"os"
"path"
"sync"
"github.com/pachyderm/pachyderm/src/client/pkg/config"
"github.com/facebookgo/pidfile"
log "github.com/sirupsen/logrus"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
_ "k8s.io/client-go/plugin/pkg/client/auth" // enables support for configs with auth
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/portforward"
"k8s.io/client-go/transport/spdy"
)
const (
pachdLocalPort = 30650
pachdRemotePort = 650
samlAcsLocalPort = 30654
dashUILocalPort = 30080
dashWebSocketLocalPort = 30081
pfsLocalPort = 30652
s3gatewayLocalPort = 30600
)
// PortForwarder handles proxying local traffic to a kubernetes pod
type PortForwarder struct {
core corev1.CoreV1Interface
client rest.Interface
config *rest.Config
namespace string
logger *io.PipeWriter
stopChansLock *sync.Mutex
stopChans []chan struct{}
shutdown bool
}
// NewPortForwarder creates a new port forwarder
func NewPortForwarder(namespace string) (*PortForwarder, error) {
cfg, err := config.Read()
if err != nil {
return nil, fmt.Errorf("could not read config: %v", err)
}
_, context, err := cfg.ActiveContext()
if err != nil {
return nil, fmt.Errorf("could not get active context: %v", err)
}
if namespace == "" {
namespace = context.Namespace
}
if namespace == "" {
namespace = "default"
}
kubeConfig := config.KubeConfig(context)
kubeClientConfig, err := kubeConfig.ClientConfig()
if err != nil {
return nil, err
}
client, err := kubernetes.NewForConfig(kubeClientConfig)
if err != nil {
return nil, err
}
core := client.CoreV1()
return &PortForwarder{
core: core,
client: core.RESTClient(),
config: kubeClientConfig,
namespace: namespace,
logger: log.StandardLogger().Writer(),
stopChansLock: &sync.Mutex{},
stopChans: []chan struct{}{},
shutdown: false,
}, nil
}
// Run starts the port forwarder. Returns after initialization is begun,
// returning any initialization errors.
func (f *PortForwarder) Run(appName string, localPort, remotePort uint16) error {
podNameSelector := map[string]string{
"suite": "pachyderm",
"app": appName,
}
podList, err := f.core.Pods(f.namespace).List(metav1.ListOptions{
LabelSelector: metav1.FormatLabelSelector(metav1.SetAsLabelSelector(podNameSelector)),
TypeMeta: metav1.TypeMeta{
Kind: "ListOptions",
APIVersion: "v1",
},
})
if err != nil {
return err
}
if len(podList.Items) == 0 {
return fmt.Errorf("No pods found for app %s", appName)
}
// Choose a random pod
podName := podList.Items[rand.Intn(len(podList.Items))].Name
url := f.client.Post().
Resource("pods").
Namespace(f.namespace).
Name(podName).
SubResource("portforward").
URL()
transport, upgrader, err := spdy.RoundTripperFor(f.config)
if err != nil {
return err
}
dialer := spdy.NewDialer(upgrader, &http.Client{Transport: transport}, "POST", url)
ports := []string{fmt.Sprintf("%d:%d", localPort, remotePort)}
readyChan := make(chan struct{}, 1)
stopChan := make(chan struct{}, 1)
// Ensure that the port forwarder isn't already shutdown, and append the
// shutdown channel so this forwarder can be closed
f.stopChansLock.Lock()
if f.shutdown {
f.stopChansLock.Unlock()
return fmt.Errorf("port forwarder is shutdown")
}
f.stopChans = append(f.stopChans, stopChan)
f.stopChansLock.Unlock()
fw, err := portforward.New(dialer, ports, stopChan, readyChan, ioutil.Discard, f.logger)
if err != nil {
return err
}
errChan := make(chan error, 1)
go func() { errChan <- fw.ForwardPorts() }()
select {
case err = <-errChan:
return fmt.Errorf("port forwarding failed: %v", err)
case <-fw.Ready:
return nil
}
}
// RunForDaemon creates a port forwarder for the pachd daemon.
func (f *PortForwarder) RunForDaemon(localPort, remotePort uint16) error {
if localPort == 0 {
localPort = pachdLocalPort
}
if remotePort == 0 {
remotePort = pachdRemotePort
}
return f.Run("pachd", localPort, remotePort)
}
// RunForSAMLACS creates a port forwarder for SAML ACS.
func (f *PortForwarder) RunForSAMLACS(localPort uint16) error {
if localPort == 0 {
localPort = samlAcsLocalPort
}
return f.Run("pachd", localPort, 654)
}
// RunForDashUI creates a port forwarder for the dash UI.
func (f *PortForwarder) RunForDashUI(localPort uint16) error {
if localPort == 0 {
localPort = dashUILocalPort
}
return f.Run("dash", localPort, 8080)
}
// RunForDashWebSocket creates a port forwarder for the dash websocket.
func (f *PortForwarder) RunForDashWebSocket(localPort uint16) error {
if localPort == 0 {
localPort = dashWebSocketLocalPort
}
return f.Run("dash", localPort, 8081)
}
// RunForPFS creates a port forwarder for PFS over HTTP.
func (f *PortForwarder) RunForPFS(localPort uint16) error {
if localPort == 0 {
localPort = pfsLocalPort
}
return f.Run("pachd", localPort, 30652)
}
// RunForS3Gateway creates a port forwarder for the s3gateway.
func (f *PortForwarder) RunForS3Gateway(localPort uint16) error {
if localPort == 0 {
localPort = s3gatewayLocalPort
}
return f.Run("pachd", localPort, 600)
}
// Lock uses pidfiles to ensure that only one port forwarder is running across
// one or more `pachctl` instances
func (f *PortForwarder) Lock() error {
pidfile.SetPidfilePath(path.Join(os.Getenv("HOME"), ".pachyderm/port-forward.pid"))
return pidfile.Write()
}
// Close shuts down port forwarding.
func (f *PortForwarder) Close() {
defer f.logger.Close()
f.stopChansLock.Lock()
defer f.stopChansLock.Unlock()
if f.shutdown {
panic("port forwarder already shutdown")
}
f.shutdown = true
for _, stopChan := range f.stopChans {
close(stopChan)
}
}