forked from etcd-io/etcd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
util.go
179 lines (156 loc) · 4.03 KB
/
util.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
// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"context"
"crypto/rand"
"fmt"
"os"
"strings"
"github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/pkg/report"
"google.golang.org/grpc/grpclog"
"github.com/bgentry/speakeasy"
)
var (
// dialTotal counts the number of mustCreateConn calls so that endpoint
// connections can be handed out in round-robin order
dialTotal int
// leaderEps is a cache for holding endpoints of a leader node
leaderEps []string
// cache the username and password for multiple connections
globalUserName string
globalPassword string
)
func mustFindLeaderEndpoints(c *clientv3.Client) {
resp, lerr := c.MemberList(context.TODO())
if lerr != nil {
fmt.Fprintf(os.Stderr, "failed to get a member list: %s\n", lerr)
os.Exit(1)
}
leaderId := uint64(0)
for _, ep := range c.Endpoints() {
if sresp, serr := c.Status(context.TODO(), ep); serr == nil {
leaderId = sresp.Leader
break
}
}
for _, m := range resp.Members {
if m.ID == leaderId {
leaderEps = m.ClientURLs
return
}
}
fmt.Fprintf(os.Stderr, "failed to find a leader endpoint\n")
os.Exit(1)
}
func getUsernamePassword(usernameFlag string) (string, string, error) {
if globalUserName != "" && globalPassword != "" {
return globalUserName, globalPassword, nil
}
colon := strings.Index(usernameFlag, ":")
if colon == -1 {
// Prompt for the password.
password, err := speakeasy.Ask("Password: ")
if err != nil {
return "", "", err
}
globalUserName = usernameFlag
globalPassword = password
} else {
globalUserName = usernameFlag[:colon]
globalPassword = usernameFlag[colon+1:]
}
return globalUserName, globalPassword, nil
}
func mustCreateConn() *clientv3.Client {
connEndpoints := leaderEps
if len(connEndpoints) == 0 {
connEndpoints = []string{endpoints[dialTotal%len(endpoints)]}
dialTotal++
}
cfg := clientv3.Config{
Endpoints: connEndpoints,
DialTimeout: dialTimeout,
}
if !tls.Empty() {
cfgtls, err := tls.ClientConfig()
if err != nil {
fmt.Fprintf(os.Stderr, "bad tls config: %v\n", err)
os.Exit(1)
}
cfg.TLS = cfgtls
}
if len(user) != 0 {
username, password, err := getUsernamePassword(user)
if err != nil {
fmt.Fprintf(os.Stderr, "bad user information: %s %v\n", user, err)
os.Exit(1)
}
cfg.Username = username
cfg.Password = password
}
client, err := clientv3.New(cfg)
if targetLeader && len(leaderEps) == 0 {
mustFindLeaderEndpoints(client)
client.Close()
return mustCreateConn()
}
clientv3.SetLogger(grpclog.NewLoggerV2(os.Stderr, os.Stderr, os.Stderr))
if err != nil {
fmt.Fprintf(os.Stderr, "dial error: %v\n", err)
os.Exit(1)
}
return client
}
func mustCreateClients(totalClients, totalConns uint) []*clientv3.Client {
conns := make([]*clientv3.Client, totalConns)
for i := range conns {
conns[i] = mustCreateConn()
}
clients := make([]*clientv3.Client, totalClients)
for i := range clients {
clients[i] = conns[i%int(totalConns)]
}
return clients
}
func mustRandBytes(n int) []byte {
rb := make([]byte, n)
_, err := rand.Read(rb)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to generate value: %v\n", err)
os.Exit(1)
}
return rb
}
func newReport() report.Report {
p := "%4.4f"
if precise {
p = "%g"
}
if sample {
return report.NewReportSample(p)
}
return report.NewReport(p)
}
func newWeightedReport() report.Report {
p := "%4.4f"
if precise {
p = "%g"
}
if sample {
return report.NewReportSample(p)
}
return report.NewWeightedReport(report.NewReport(p), p)
}