-
Notifications
You must be signed in to change notification settings - Fork 474
/
client.go
238 lines (215 loc) · 7.11 KB
/
client.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
235
236
237
238
package jaeger
import (
"context"
"errors"
"fmt"
"io"
"net"
"net/http"
"net/url"
"strconv"
"time"
"github.com/jaegertracing/jaeger/model"
jsonConv "github.com/jaegertracing/jaeger/model/converter/json"
jsonModel "github.com/jaegertracing/jaeger/model/json"
"github.com/jaegertracing/jaeger/proto-gen/api_v2"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/kiali/kiali/config"
"github.com/kiali/kiali/log"
"github.com/kiali/kiali/models"
"github.com/kiali/kiali/util/grpcutil"
"github.com/kiali/kiali/util/httputil"
)
// ClientInterface for mocks (only mocked function are necessary here)
type ClientInterface interface {
GetAppTraces(ns, app string, query models.TracingQuery) (traces *JaegerResponse, err error)
GetTraceDetail(traceId string) (*JaegerSingleTrace, error)
GetErrorTraces(ns, app string, duration time.Duration) (errorTraces int, err error)
}
// Client for Jaeger API.
type Client struct {
ClientInterface
grpcClient api_v2.QueryServiceClient
httpClient http.Client
baseURL *url.URL
ctx context.Context
}
func NewClient(token string) (*Client, error) {
cfg := config.Get()
cfgTracing := cfg.ExternalServices.Tracing
if !cfgTracing.Enabled {
return nil, errors.New("jaeger is not enabled")
} else {
auth := cfgTracing.Auth
if auth.UseKialiToken {
auth.Token = token
}
ctx := context.Background()
u, errParse := url.Parse(cfgTracing.InClusterURL)
if !cfg.InCluster {
u, errParse = url.Parse(cfgTracing.URL)
}
if errParse != nil {
log.Errorf("Error parsing Jaeger URL: %s", errParse)
return nil, errParse
}
if cfgTracing.UseGRPC {
// GRPC client
// Note: jaeger-query does not have built-in secured communication, at the moment it is only achieved through reverse proxies (cf https://github.com/jaegertracing/jaeger/issues/1718).
// When using the GRPC client, if a proxy is used it has to support GRPC.
// Basic and Token auth are in theory implemented for the GRPC client (see package grpcutil) but were not tested because openshift's oauth-proxy doesn't support GRPC at the time.
// Leaving some commented-out code below -- perhaps useful, perhaps not -- to consider when testing secured GRPC.
// if auth.Token != "" {
// requestMetadata := metadata.New(map[string]string{
// spanstore.BearerTokenKey: auth.Token,
// })
// ctx = metadata.NewOutgoingContext(ctx, requestMetadata)
// }
port := u.Port()
if port == "" {
p, _ := net.LookupPort("tcp", u.Scheme)
port = strconv.Itoa(p)
}
opts, err := grpcutil.GetAuthDialOptions(u.Scheme == "https", &auth)
if err != nil {
log.Errorf("Error while building GRPC dial options: %v", err)
return nil, err
}
address := fmt.Sprintf("%s:%s", u.Hostname(), port)
log.Tracef("Jaeger GRPC client info: address=%s, auth.type=%s", address, auth.Type)
conn, err := grpc.Dial(address, opts...)
if err != nil {
log.Errorf("Error while establishing GRPC connection: %v", err)
return nil, err
}
client := api_v2.NewQueryServiceClient(conn)
return &Client{grpcClient: client, ctx: ctx}, nil
} else {
// Legacy HTTP client
log.Tracef("Using legacy HTTP client for Jaeger: url=%v, auth.type=%s", u, auth.Type)
timeout := time.Duration(5000 * time.Millisecond)
transport, err := httputil.CreateTransport(&auth, &http.Transport{}, timeout)
if err != nil {
return nil, err
}
client := http.Client{Transport: transport, Timeout: timeout}
return &Client{httpClient: client, baseURL: u, ctx: ctx}, nil
}
}
}
// GetAppTraces fetches traces of an app
func (in *Client) GetAppTraces(namespace, app string, q models.TracingQuery) (*JaegerResponse, error) {
if in.grpcClient == nil {
return getAppTracesHTTP(in.httpClient, in.baseURL, namespace, app, q)
}
jaegerServiceName := buildJaegerServiceName(namespace, app)
findTracesRQ := &api_v2.FindTracesRequest{
Query: &api_v2.TraceQueryParameters{
ServiceName: jaegerServiceName,
StartTimeMin: q.Start,
StartTimeMax: q.End,
Tags: q.Tags,
DurationMin: q.MinDuration,
SearchDepth: int32(q.Limit),
},
}
ctx, cancel := context.WithTimeout(in.ctx, 4*time.Second)
defer cancel()
stream, err := in.grpcClient.FindTraces(ctx, findTracesRQ)
if err != nil {
err = fmt.Errorf("GetAppTraces, Jaeger GRPC client error: %v", err)
log.Error(err.Error())
return nil, err
}
tracesMap, err := readSpansStream(stream)
if err != nil {
return nil, err
}
r := JaegerResponse{
Data: []jsonModel.Trace{},
JaegerServiceName: jaegerServiceName,
}
for _, t := range tracesMap {
converted := jsonConv.FromDomain(t)
r.Data = append(r.Data, *converted)
}
return &r, nil
}
// GetTraceDetail fetches a specific trace from its ID
func (in *Client) GetTraceDetail(strTraceID string) (*JaegerSingleTrace, error) {
if in.grpcClient == nil {
return getTraceDetailHTTP(in.httpClient, in.baseURL, strTraceID)
}
traceID, err := model.TraceIDFromString(strTraceID)
if err != nil {
return nil, fmt.Errorf("GetTraceDetail, invalid trace ID: %v", err)
}
getTraceRQ := &api_v2.GetTraceRequest{TraceID: traceID}
ctx, cancel := context.WithTimeout(in.ctx, 4*time.Second)
defer cancel()
stream, err := in.grpcClient.GetTrace(ctx, getTraceRQ)
if err != nil {
return nil, fmt.Errorf("GetTraceDetail, Jaeger GRPC client error: %v", err)
}
tracesMap, err := readSpansStream(stream)
if err != nil {
return nil, err
}
if trace, ok := tracesMap[traceID]; ok {
converted := jsonConv.FromDomain(trace)
return &JaegerSingleTrace{Data: *converted}, nil
}
// Not found
return nil, nil
}
// GetErrorTraces fetches number of traces in error for the given app
func (in *Client) GetErrorTraces(ns, app string, duration time.Duration) (int, error) {
// Note: grpc vs http switch is performed in subsequent call 'GetAppTraces'
now := time.Now()
query := models.TracingQuery{
Start: now.Add(-duration),
End: now,
Tags: map[string]string{"error": "true"},
}
traces, err := in.GetAppTraces(ns, app, query)
if err != nil {
return 0, err
}
return len(traces.Data), nil
}
type SpansStreamer interface {
Recv() (*api_v2.SpansResponseChunk, error)
grpc.ClientStream
}
func readSpansStream(stream SpansStreamer) (map[model.TraceID]*model.Trace, error) {
tracesMap := make(map[model.TraceID]*model.Trace)
for received, err := stream.Recv(); err != io.EOF; received, err = stream.Recv() {
if err != nil {
if status.Code(err) == codes.DeadlineExceeded {
log.Trace("Jaeger GRPC client timeout")
break
}
log.Errorf("jaeger GRPC client, stream error: %v", err)
return nil, fmt.Errorf("Jaeger GRPC client, stream error: %v", err)
}
for i, span := range received.Spans {
if trace, ok := tracesMap[span.TraceID]; ok {
trace.Spans = append(trace.Spans, &received.Spans[i])
} else {
tracesMap[span.TraceID] = &model.Trace{
Spans: []*model.Span{&received.Spans[i]},
}
}
}
}
return tracesMap, nil
}
func buildJaegerServiceName(namespace, app string) string {
conf := config.Get()
if conf.ExternalServices.Tracing.NamespaceSelector && namespace != conf.IstioNamespace {
return app + "." + namespace
}
return app
}