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
|
package main
import (
"errors"
"fmt"
"io"
"os"
"os/exec"
"strings"
"time"
)
const vclTemplate = `vcl {
app-socket-api %[1]s/var/run/app_ns_sockets/%[2]s
app-scope-global
app-scope-local
namespace-id %[2]s
namespace-secret %[2]s
use-mq-eventfd
}
`
const NetworkTopologyDir string = "topo-network/"
const ContainerTopologyDir string = "topo-containers/"
type Stanza struct {
content string
pad int
}
type ActionResult struct {
Err error
Desc string
ErrOutput string
StdOutput string
}
type JsonResult struct {
Code int
Desc string
ErrOutput string
StdOutput string
}
func StartServerApp(running chan error, done chan struct{}, env []string) {
cmd := exec.Command("iperf3", "-4", "-s")
if env != nil {
cmd.Env = env
}
err := cmd.Start()
if err != nil {
msg := fmt.Errorf("failed to start iperf server: %v", err)
running <- msg
return
}
running <- nil
<-done
cmd.Process.Kill()
}
func StartClientApp(ipAddress string, env []string, clnCh chan error, clnRes chan string) {
defer func() {
clnCh <- nil
}()
nTries := 0
for {
cmd := exec.Command("iperf3", "-c", ipAddress, "-u", "-l", "1460", "-b", "10g")
if env != nil {
cmd.Env = env
}
o, err := cmd.CombinedOutput()
if err != nil {
if nTries > 5 {
clnCh <- fmt.Errorf("failed to start client app '%s'.\n%s", err, o)
return
}
time.Sleep(1 * time.Second)
nTries++
continue
} else {
clnRes <- fmt.Sprintf("Client output: %s", o)
}
break
}
}
func assertFileSize(f1, f2 string) error {
fi1, err := os.Stat(f1)
if err != nil {
return err
}
fi2, err1 := os.Stat(f2)
if err1 != nil {
return err1
}
if fi1.Size() != fi2.Size() {
return fmt.Errorf("file sizes differ (%d vs %d)", fi1.Size(), fi2.Size())
}
return nil
}
func startHttpServer(running chan struct{}, done chan struct{}, addressPort, netNs string) {
cmd := NewCommand([]string{"./http_server", addressPort}, netNs)
err := cmd.Start()
if err != nil {
fmt.Println("Failed to start http server")
return
}
running <- struct{}{}
<-done
cmd.Process.Kill()
}
func startWget(finished chan error, server_ip, port, query, netNs string) {
defer func() {
finished <- errors.New("wget error")
}()
cmd := NewCommand([]string{"wget", "--timeout=10", "--no-proxy", "--tries=5", "-O", "/dev/null", server_ip + ":" + port + "/" + query},
netNs)
o, err := cmd.CombinedOutput()
if err != nil {
finished <- fmt.Errorf("wget error: '%v\n\n%s'", err, o)
return
} else if strings.Contains(string(o), "200 OK") == false {
finished <- fmt.Errorf("wget error: response not 200 OK")
return
}
finished <- nil
}
func (c *Stanza) NewStanza(name string) *Stanza {
c.Append("\n" + name + " {")
c.pad += 2
return c
}
func (c *Stanza) Append(name string) *Stanza {
c.content += strings.Repeat(" ", c.pad)
c.content += name + "\n"
return c
}
func (c *Stanza) Close() *Stanza {
c.content += "}\n"
c.pad -= 2
return c
}
func (s *Stanza) ToString() string {
return s.content
}
func (s *Stanza) SaveToFile(fileName string) error {
fo, err := os.Create(fileName)
if err != nil {
return err
}
defer fo.Close()
_, err = io.Copy(fo, strings.NewReader(s.content))
return err
}
|
