-
Notifications
You must be signed in to change notification settings - Fork 711
/
controls.go
223 lines (198 loc) · 6.23 KB
/
controls.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
package docker
import (
docker_client "github.com/fsouza/go-dockerclient"
log "github.com/sirupsen/logrus"
"github.com/weaveworks/scope/common/xfer"
"github.com/weaveworks/scope/probe/controls"
"github.com/weaveworks/scope/report"
)
// Control IDs used by the docker integration.
const (
StopContainer = report.DockerStopContainer
StartContainer = report.DockerStartContainer
RestartContainer = report.DockerRestartContainer
PauseContainer = report.DockerPauseContainer
UnpauseContainer = report.DockerUnpauseContainer
RemoveContainer = report.DockerRemoveContainer
AttachContainer = report.DockerAttachContainer
ExecContainer = report.DockerExecContainer
ResizeExecTTY = "docker_resize_exec_tty"
waitTime = 10
)
func (r *registry) stopContainer(containerID string, _ xfer.Request) xfer.Response {
log.Infof("Stopping container %s", containerID)
return xfer.ResponseError(r.client.StopContainer(containerID, waitTime))
}
func (r *registry) startContainer(containerID string, _ xfer.Request) xfer.Response {
log.Infof("Starting container %s", containerID)
return xfer.ResponseError(r.client.StartContainer(containerID, nil))
}
func (r *registry) restartContainer(containerID string, _ xfer.Request) xfer.Response {
log.Infof("Restarting container %s", containerID)
return xfer.ResponseError(r.client.RestartContainer(containerID, waitTime))
}
func (r *registry) pauseContainer(containerID string, _ xfer.Request) xfer.Response {
log.Infof("Pausing container %s", containerID)
return xfer.ResponseError(r.client.PauseContainer(containerID))
}
func (r *registry) unpauseContainer(containerID string, _ xfer.Request) xfer.Response {
log.Infof("Unpausing container %s", containerID)
return xfer.ResponseError(r.client.UnpauseContainer(containerID))
}
func (r *registry) removeContainer(containerID string, req xfer.Request) xfer.Response {
log.Infof("Removing container %s", containerID)
if err := r.client.RemoveContainer(docker_client.RemoveContainerOptions{
ID: containerID,
}); err != nil {
return xfer.ResponseError(err)
}
return xfer.Response{
RemovedNode: req.NodeID,
}
}
func (r *registry) attachContainer(containerID string, req xfer.Request) xfer.Response {
c, ok := r.GetContainer(containerID)
if !ok {
return xfer.ResponseErrorf("Not found: %s", containerID)
}
hasTTY := c.HasTTY()
id, pipe, err := controls.NewPipe(r.pipes, req.AppID)
if err != nil {
return xfer.ResponseError(err)
}
local, _ := pipe.Ends()
cw, err := r.client.AttachToContainerNonBlocking(docker_client.AttachToContainerOptions{
Container: containerID,
RawTerminal: hasTTY,
Stream: true,
Stdin: true,
Stdout: true,
Stderr: true,
InputStream: local,
OutputStream: local,
ErrorStream: local,
})
if err != nil {
pipe.Close()
return xfer.ResponseError(err)
}
pipe.OnClose(func() {
if err := cw.Close(); err != nil {
log.Errorf("Error closing attachment to container %s: %v", containerID, err)
return
}
})
go func() {
if err := cw.Wait(); err != nil {
log.Errorf("Error waiting on attachment to container %s: %v", containerID, err)
}
pipe.Close()
}()
return xfer.Response{
Pipe: id,
RawTTY: hasTTY,
}
}
func (r *registry) execContainer(containerID string, req xfer.Request) xfer.Response {
exec, err := r.client.CreateExec(docker_client.CreateExecOptions{
AttachStdin: true,
AttachStdout: true,
AttachStderr: true,
Tty: true,
Cmd: []string{"/bin/sh", "-c", "TERM=xterm exec $( (type getent > /dev/null 2>&1 && getent passwd root | cut -d: -f7 2>/dev/null) || echo /bin/sh)"},
Container: containerID,
})
if err != nil {
return xfer.ResponseError(err)
}
id, pipe, err := controls.NewPipe(r.pipes, req.AppID)
if err != nil {
return xfer.ResponseError(err)
}
local, _ := pipe.Ends()
cw, err := r.client.StartExecNonBlocking(exec.ID, docker_client.StartExecOptions{
Tty: true,
RawTerminal: true,
InputStream: local,
OutputStream: local,
ErrorStream: local,
})
if err != nil {
pipe.Close()
return xfer.ResponseError(err)
}
r.Lock()
r.pipeIDToexecID[id] = exec.ID
r.Unlock()
pipe.OnClose(func() {
if err := cw.Close(); err != nil {
log.Errorf("Error closing exec in container %s: %v", containerID, err)
return
}
r.Lock()
delete(r.pipeIDToexecID, id)
r.Unlock()
})
go func() {
if err := cw.Wait(); err != nil {
log.Errorf("Error waiting on exec in container %s: %v", containerID, err)
}
pipe.Close()
}()
return xfer.Response{
Pipe: id,
RawTTY: true,
ResizeTTYControl: ResizeExecTTY,
}
}
func (r *registry) resizeExecTTY(pipeID string, height, width uint) xfer.Response {
r.Lock()
execID, ok := r.pipeIDToexecID[pipeID]
r.Unlock()
if !ok {
return xfer.ResponseErrorf("Unknown pipeID (%q)", pipeID)
}
if err := r.client.ResizeExecTTY(execID, int(height), int(width)); err != nil {
return xfer.ResponseErrorf(
"Error setting terminal size (%d, %d) of pipe %s: %v",
height, width, pipeID, err)
}
return xfer.Response{}
}
func captureContainerID(f func(string, xfer.Request) xfer.Response) func(xfer.Request) xfer.Response {
return func(req xfer.Request) xfer.Response {
containerID, ok := report.ParseContainerNodeID(req.NodeID)
if !ok {
return xfer.ResponseErrorf("Invalid ID: %s", req.NodeID)
}
return f(containerID, req)
}
}
func (r *registry) registerControls() {
controls := map[string]xfer.ControlHandlerFunc{
StopContainer: captureContainerID(r.stopContainer),
StartContainer: captureContainerID(r.startContainer),
RestartContainer: captureContainerID(r.restartContainer),
PauseContainer: captureContainerID(r.pauseContainer),
UnpauseContainer: captureContainerID(r.unpauseContainer),
RemoveContainer: captureContainerID(r.removeContainer),
AttachContainer: captureContainerID(r.attachContainer),
ExecContainer: captureContainerID(r.execContainer),
ResizeExecTTY: xfer.ResizeTTYControlWrapper(r.resizeExecTTY),
}
r.handlerRegistry.Batch(nil, controls)
}
func (r *registry) deregisterControls() {
controls := []string{
StopContainer,
StartContainer,
RestartContainer,
PauseContainer,
UnpauseContainer,
RemoveContainer,
AttachContainer,
ExecContainer,
ResizeExecTTY,
}
r.handlerRegistry.Batch(controls, nil)
}