-
Notifications
You must be signed in to change notification settings - Fork 474
/
response_time.go
230 lines (194 loc) · 10.5 KB
/
response_time.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
package appender
import (
"fmt"
"math"
"time"
"github.com/prometheus/common/model"
"github.com/kiali/kiali/graph"
"github.com/kiali/kiali/graph/telemetry/istio/util"
"github.com/kiali/kiali/log"
"github.com/kiali/kiali/prometheus"
)
const (
// ResponseTimeAppenderName uniquely identifies the appender: responseTime
ResponseTimeAppenderName = "responseTime"
)
// ResponseTimeAppender is responsible for adding responseTime information to the graph. ResponseTime
// is represented as a percentile value. The default is 95th percentile, which means that
// 95% of requests executed in no more than the resulting milliseconds. ResponeTime values are
// reported in milliseconds.
// Response Times are reported using destination proxy telemetry, when available, which should remove
// network latency fluctuations.
// TODO: Should we report both source and destination when possible (with and without latency)?
// Name: responseTime
type ResponseTimeAppender struct {
GraphType string
InjectServiceNodes bool
Namespaces graph.NamespaceInfoMap
Quantile float64
QueryTime int64 // unix time in seconds
Rates graph.RequestedRates
}
// Name implements Appender
func (a ResponseTimeAppender) Name() string {
return ResponseTimeAppenderName
}
// AppendGraph implements Appender
func (a ResponseTimeAppender) AppendGraph(trafficMap graph.TrafficMap, globalInfo *graph.AppenderGlobalInfo, namespaceInfo *graph.AppenderNamespaceInfo) {
if len(trafficMap) == 0 {
return
}
// Response times only apply to request traffic (not TCP or gRPC-message traffic)
if a.Rates.Grpc != graph.RateRequests && a.Rates.Http != graph.RateRequests {
return
}
if globalInfo.PromClient == nil {
var err error
globalInfo.PromClient, err = prometheus.NewClient()
graph.CheckError(err)
}
a.appendGraph(trafficMap, namespaceInfo.Namespace, globalInfo.PromClient)
}
func (a ResponseTimeAppender) appendGraph(trafficMap graph.TrafficMap, namespace string, client *prometheus.Client) {
// create map to quickly look up responseTime
responseTimeMap := make(map[string]float64)
duration := a.Namespaces[namespace].Duration
quantile := a.Quantile
if a.Quantile == 0.0 {
log.Tracef("Generating average responseTime; namespace = %v", namespace)
// query prometheus for the responseTime info in two queries:
groupBy := "source_cluster,source_workload_namespace,source_workload,source_canonical_service,source_canonical_revision,destination_cluster,destination_service_namespace,destination_service,destination_service_name,destination_workload_namespace,destination_workload,destination_canonical_service,destination_canonical_revision,request_protocol"
// 1) Incoming: query destination telemetry to capture namespace services' incoming traffic
// note - the query order is important as both queries may have overlapping results for edges within
// the namespace. This query uses destination proxy and so must come first.
query := fmt.Sprintf(`sum(rate(%s{reporter="destination",destination_service_namespace="%s"}[%vs])) by (%s) / sum(rate(%s{reporter="destination",destination_service_namespace="%s"}[%vs])) by (%s) > 0`,
"istio_request_duration_milliseconds_sum",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy,
"istio_request_duration_milliseconds_count",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy)
incomingVector := promQuery(query, time.Unix(a.QueryTime, 0), client.GetContext(), client.API(), a)
a.populateResponseTimeMap(responseTimeMap, &incomingVector)
// 2) Outgoing: query source telemetry to capture namespace workloads' outgoing traffic
query = fmt.Sprintf(`sum(rate(%s{reporter="source",source_workload_namespace="%s"}[%vs])) by (%s) / sum(rate(%s{reporter="source",source_workload_namespace="%s"}[%vs])) by (%s) > 0`,
"istio_request_duration_milliseconds_sum",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy,
"istio_request_duration_milliseconds_count",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy)
outgoingVector := promQuery(query, time.Unix(a.QueryTime, 0), client.GetContext(), client.API(), a)
a.populateResponseTimeMap(responseTimeMap, &outgoingVector)
} else {
log.Tracef("Generating responseTime for quantile [%.2f]; namespace = %v", quantile, namespace)
// query prometheus for the responseTime info in two queries:
groupBy := "le,source_cluster,source_workload_namespace,source_workload,source_canonical_service,source_canonical_revision,destination_cluster,destination_service_namespace,destination_service,destination_service_name,destination_workload_namespace,destination_workload,destination_canonical_service,destination_canonical_revision,request_protocol"
// 1) Incoming: query destination telemetry to capture namespace services' incoming traffic
// note - the query order is important as both queries may have overlapping results for edges within
// the namespace. This query uses destination proxy and so must come first.
query := fmt.Sprintf(`histogram_quantile(%.2f, sum(rate(%s{reporter="destination",destination_service_namespace="%s"}[%vs])) by (%s)) > 0`,
quantile,
"istio_request_duration_milliseconds_bucket",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy)
incomingVector := promQuery(query, time.Unix(a.QueryTime, 0), client.GetContext(), client.API(), a)
a.populateResponseTimeMap(responseTimeMap, &incomingVector)
// 2) Outgoing: query source telemetry to capture namespace workloads' outgoing traffic
query = fmt.Sprintf(`histogram_quantile(%.2f, sum(rate(%s{reporter="source",source_workload_namespace="%s"}[%vs])) by (%s)) > 0`,
quantile,
"istio_request_duration_milliseconds_bucket",
namespace,
int(duration.Seconds()), // range duration for the query
groupBy)
outgoingVector := promQuery(query, time.Unix(a.QueryTime, 0), client.GetContext(), client.API(), a)
a.populateResponseTimeMap(responseTimeMap, &outgoingVector)
}
applyResponseTime(trafficMap, responseTimeMap)
}
func applyResponseTime(trafficMap graph.TrafficMap, responseTimeMap map[string]float64) {
for _, n := range trafficMap {
for _, e := range n.Edges {
key := fmt.Sprintf("%s %s %s", e.Source.ID, e.Dest.ID, e.Metadata[graph.ProtocolKey].(string))
if val, ok := responseTimeMap[key]; ok {
e.Metadata[graph.ResponseTime] = val
}
}
}
}
func (a ResponseTimeAppender) populateResponseTimeMap(responseTimeMap map[string]float64, vector *model.Vector) {
skipRequestsGrpc := a.Rates.Grpc != graph.RateRequests
skipRequestsHttp := a.Rates.Http != graph.RateRequests
for _, s := range *vector {
m := s.Metric
lSourceCluster, sourceClusterOk := m["source_cluster"]
lSourceWlNs, sourceWlNsOk := m["source_workload_namespace"]
lSourceWl, sourceWlOk := m["source_workload"]
lSourceApp, sourceAppOk := m["source_canonical_service"]
lSourceVer, sourceVerOk := m["source_canonical_revision"]
lDestCluster, destClusterOk := m["destination_cluster"]
lDestSvcNs, destSvcNsOk := m["destination_service_namespace"]
lDestSvc, destSvcOk := m["destination_service"]
lDestSvcName, destSvcNameOk := m["destination_service_name"]
lDestWlNs, destWlNsOk := m["destination_workload_namespace"]
lDestWl, destWlOk := m["destination_workload"]
lDestApp, destAppOk := m["destination_canonical_service"]
lDestVer, destVerOk := m["destination_canonical_revision"]
lProtocol, protocolOk := m["request_protocol"]
if !sourceWlNsOk || !sourceWlOk || !sourceAppOk || !sourceVerOk || !destSvcNsOk || !destSvcNameOk || !destSvcOk || !destWlNsOk || !destWlOk || !destAppOk || !destVerOk || !protocolOk {
log.Warningf("populateResponseTimeMap: Skipping %s, missing expected labels", m.String())
continue
}
sourceWlNs := string(lSourceWlNs)
sourceWl := string(lSourceWl)
sourceApp := string(lSourceApp)
sourceVer := string(lSourceVer)
destSvc := string(lDestSvc)
protocol := string(lProtocol)
if (skipRequestsHttp && protocol == graph.HTTP.Name) || (skipRequestsGrpc && protocol == graph.GRPC.Name) {
continue
}
// handle clusters
sourceCluster, destCluster := util.HandleClusters(lSourceCluster, sourceClusterOk, lDestCluster, destClusterOk)
if util.IsBadSourceTelemetry(sourceCluster, sourceClusterOk, sourceWlNs, sourceWl, sourceApp) {
continue
}
val := float64(s.Value)
// handle unusual destinations
destCluster, destSvcNs, destSvcName, destWlNs, destWl, destApp, destVer, _ := util.HandleDestination(sourceCluster, sourceWlNs, sourceWl, destCluster, string(lDestSvcNs), string(lDestSvc), string(lDestSvcName), string(lDestWlNs), string(lDestWl), string(lDestApp), string(lDestVer))
if util.IsBadDestTelemetry(destCluster, destClusterOk, destSvcNs, destSvc, destSvcName, destWl) {
continue
}
// Should not happen but if NaN for any reason, Just skip it
if math.IsNaN(val) {
continue
}
// don't inject a service node if destSvcName is not set or the dest node is already a service node.
inject := false
if a.InjectServiceNodes && graph.IsOK(destSvcName) {
_, destNodeType := graph.Id(destCluster, destSvcNs, destSvcName, destWlNs, destWl, destApp, destVer, a.GraphType)
inject = (graph.NodeTypeService != destNodeType)
}
if inject {
// Only set response time on the outgoing edge. On the incoming edge, we can't validly aggregate response times of the outgoing edges (kiali-2297)
a.addResponseTime(responseTimeMap, val, protocol, destCluster, destSvcNs, destSvcName, "", "", "", destCluster, destSvcNs, destSvcName, destWlNs, destWl, destApp, destVer)
} else {
a.addResponseTime(responseTimeMap, val, protocol, sourceCluster, sourceWlNs, "", sourceWl, sourceApp, sourceVer, destCluster, destSvcNs, destSvcName, destWlNs, destWl, destApp, destVer)
}
}
}
func (a ResponseTimeAppender) addResponseTime(responseTimeMap map[string]float64, val float64, protocol, sourceCluster, sourceNs, sourceSvc, sourceWl, sourceApp, sourceVer, destCluster, destSvcNs, destSvc, destWlNs, destWl, destApp, destVer string) {
sourceID, _ := graph.Id(sourceCluster, sourceNs, sourceSvc, sourceNs, sourceWl, sourceApp, sourceVer, a.GraphType)
destID, _ := graph.Id(destCluster, destSvcNs, destSvc, destWlNs, destWl, destApp, destVer, a.GraphType)
key := fmt.Sprintf("%s %s %s", sourceID, destID, protocol)
// For edges within the namespace we may get a responseTime reported from both the incoming and outgoing
// traffic queries. We assume here the first reported value is preferred (i.e. defer to query order)
if _, found := responseTimeMap[key]; !found {
responseTimeMap[key] = val
}
}