-
Notifications
You must be signed in to change notification settings - Fork 23
/
dialer_test.go
188 lines (165 loc) · 10.3 KB
/
dialer_test.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
// Copyright 2016 Michal Witkowski. All Rights Reserved.
// See LICENSE for licensing terms.
package conntrack_test
import (
"context"
"net"
"net/http"
"testing"
"time"
"github.com/mwitkow/go-conntrack"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
)
func TestDialerWrapper(t *testing.T) {
suite.Run(t, &DialerTestSuite{})
}
type DialerTestSuite struct {
suite.Suite
serverListener net.Listener
httpServer http.Server
}
func (s *DialerTestSuite) SetupSuite() {
var err error
s.serverListener, err = net.Listen("tcp", "127.0.0.1:0")
require.NoError(s.T(), err, "must be able to allocate a port for serverListener")
s.httpServer = http.Server{
Handler: http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
resp.WriteHeader(http.StatusOK)
}),
}
go func() {
s.httpServer.Serve(s.serverListener)
}()
}
func (s *DialerTestSuite) TestDialerMetricsArePreregistered() {
conntrack.NewDialContextFunc() // dialer name = default
conntrack.NewDialContextFunc(conntrack.DialWithName("foobar"))
conntrack.PreRegisterDialerMetrics("something_manual")
for testId, testCase := range []struct {
metricName string
existingLabels []string
}{
{"net_conntrack_dialer_conn_attempted_total", []string{"default"}},
{"net_conntrack_dialer_conn_attempted_total", []string{"foobar"}},
{"net_conntrack_dialer_conn_attempted_total", []string{"something_manual"}},
{"net_conntrack_dialer_conn_closed_total", []string{"default"}},
{"net_conntrack_dialer_conn_closed_total", []string{"foobar"}},
{"net_conntrack_dialer_conn_closed_total", []string{"something_manual"}},
{"net_conntrack_dialer_conn_established_total", []string{"default"}},
{"net_conntrack_dialer_conn_established_total", []string{"foobar"}},
{"net_conntrack_dialer_conn_established_total", []string{"something_manual"}},
{"net_conntrack_dialer_conn_failed_total", []string{"default", "resolution"}},
{"net_conntrack_dialer_conn_failed_total", []string{"default", "refused"}},
{"net_conntrack_dialer_conn_failed_total", []string{"default", "timeout"}},
{"net_conntrack_dialer_conn_failed_total", []string{"default", "unknown"}},
} {
lineCount := len(fetchPrometheusLines(s.T(), testCase.metricName, testCase.existingLabels...))
assert.NotEqual(s.T(), 0, lineCount, "metrics must exist for test case %d", testId)
}
}
func (s *DialerTestSuite) TestDialerMetricsAreNotPreregisteredWithMonitoringOff() {
conntrack.NewDialContextFunc(conntrack.DialWithName("nomon"), conntrack.DialWithoutMonitoring())
for testId, testCase := range []struct {
metricName string
existingLabels []string
}{
{"net_conntrack_dialer_conn_attempted_total", []string{"nomon"}},
{"net_conntrack_dialer_conn_closed_total", []string{"nomon"}},
{"net_conntrack_dialer_conn_established_total", []string{"nomon"}},
{"net_conntrack_dialer_conn_failed_total", []string{"nomon", "resolution"}},
{"net_conntrack_dialer_conn_failed_total", []string{"nomon", "refused"}},
{"net_conntrack_dialer_conn_failed_total", []string{"nomon", "timeout"}},
{"net_conntrack_dialer_conn_failed_total", []string{"nomon", "unknown"}},
} {
lineCount := len(fetchPrometheusLines(s.T(), testCase.metricName, testCase.existingLabels...))
assert.Equal(s.T(), 0, lineCount, "metrics should not be registered exist for test case %d", testId)
}
}
func (s *DialerTestSuite) TestDialerUnderNormalConnection() {
dialFunc := conntrack.NewDialContextFunc(conntrack.DialWithName("normal_conn"))
beforeAttempts := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "normal_conn")
beforeEstablished := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "normal_conn")
beforeClosed := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "normal_conn")
conn, err := dialFunc(context.TODO(), "tcp", s.serverListener.Addr().String())
require.NoError(s.T(), err, "NewDialContextFunc should successfully establish a conn here")
assert.Equal(s.T(), beforeAttempts+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "normal_conn"),
"the attempted conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeEstablished+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "normal_conn"),
"the established conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeClosed, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "normal_conn"),
"the closed conn counter must not be incremented after connection was opened")
conn.Close()
assert.Equal(s.T(), beforeClosed+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "normal_conn"),
"the closed conn counter must be incremented after connection was closed")
}
func (s *DialerTestSuite) TestDialerWithContextName() {
dialFunc := conntrack.NewDialContextFunc()
conntrack.PreRegisterDialerMetrics("ctx_conn")
beforeAttempts := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "ctx_conn")
beforeEstablished := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "ctx_conn")
beforeClosed := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "ctx_conn")
conn, err := dialFunc(conntrack.DialNameToContext(context.TODO(), "ctx_conn"), "tcp", s.serverListener.Addr().String())
require.NoError(s.T(), err, "NewDialContextFunc should successfully establish a conn here")
assert.Equal(s.T(), beforeAttempts+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "ctx_conn"),
"the attempted conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeEstablished+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "ctx_conn"),
"the established conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeClosed, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "ctx_conn"),
"the closed conn counter must not be incremented after connection was opened")
conn.Close()
assert.Equal(s.T(), beforeClosed+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "ctx_conn"),
"the closed conn counter must be incremented after connection was closed")
}
func (s *ListenerTestSuite) TestDialerTracingCapturedInPage() {
dialFunc := conntrack.NewDialContextFunc(conntrack.DialWithTracing())
dialerName := "some_dialer"
conn, err := dialFunc(conntrack.DialNameToContext(context.TODO(), dialerName), "tcp", s.serverListener.Addr().String())
time.Sleep(5 * time.Millisecond)
require.NoError(s.T(), err, "DialContext should successfully establish a conn here")
assert.Contains(s.T(), fetchTraceEvents(s.T(), "net.ClientConn."+dialerName), conn.LocalAddr().String(),
"the /debug/trace/events page must contain the live connection")
time.Sleep(5 * time.Millisecond)
conn.Close()
}
func (s *DialerTestSuite) TestDialerResolutionFailure() {
dialFunc := conntrack.NewDialContextFunc(conntrack.DialWithName("res_err"))
beforeAttempts := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "res_err")
beforeEstablished := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "res_err")
beforeResolutionErrors := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_failed_total", "res_err", "resolution")
beforeClosed := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "res_err")
_, err := dialFunc(context.TODO(), "tcp", "dialer.test.wrong.domain.wrong:443")
require.Error(s.T(), err, "NewDialContextFunc should fail here")
assert.Equal(s.T(), beforeAttempts+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "res_err"),
"the attempted conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeEstablished, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "res_err"),
"the established conn counter must not be incremented on a failure")
assert.Equal(s.T(), beforeClosed, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "res_err"),
"the closed conn counter must not be incremented on a failure")
assert.Equal(s.T(), beforeResolutionErrors+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_failed_total", "res_err", "resolution"),
"the failure counter for resolution error should be incremented")
}
func (s *DialerTestSuite) TestDialerRefusedFailure() {
dialFunc := conntrack.NewDialContextFunc(conntrack.DialWithName("ref_err"))
beforeAttempts := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "ref_err")
beforeEstablished := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "ref_err")
beforeResolutionErrors := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_failed_total", "ref_err", "resolution")
beforeClosed := sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "ref_err")
_, err := dialFunc(context.TODO(), "tcp", "127.0.0.1:337") // 337 is a cool port, let's hope its unused.
require.Error(s.T(), err, "NewDialContextFunc should fail here")
assert.Equal(s.T(), beforeAttempts+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_attempted_total", "ref_err"),
"the attempted conn counter must be incremented after connection was opened")
assert.Equal(s.T(), beforeEstablished, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_established_total", "ref_err"),
"the established conn counter must not be incremented on a failure")
assert.Equal(s.T(), beforeClosed, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_closed_total", "ref_err"),
"the closed conn counter must not be incremented on a failure")
assert.Equal(s.T(), beforeResolutionErrors+1, sumCountersForMetricAndLabels(s.T(), "net_conntrack_dialer_conn_failed_total", "ref_err", "refused"),
"the failure counter for connection refused error should be incremented")
}
func (s *DialerTestSuite) TearDownSuite() {
if s.serverListener != nil {
s.T().Logf("stopped http.Server at: %v", s.serverListener.Addr().String())
s.serverListener.Close()
}
}