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metrics.go
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metrics.go
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package handlers
import (
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"github.com/gorilla/mux"
"github.com/kiali/kiali/business"
"github.com/kiali/kiali/config"
"github.com/kiali/kiali/log"
"github.com/kiali/kiali/models"
"github.com/kiali/kiali/prometheus"
"github.com/kiali/kiali/util"
)
// AppMetrics is the API handler to fetch metrics to be displayed, related to an app-label grouping
func AppMetrics(w http.ResponseWriter, r *http.Request) {
getAppMetrics(w, r, defaultPromClientSupplier)
}
// getAppMetrics (mock-friendly version)
func getAppMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
vars := mux.Vars(r)
namespace := vars["namespace"]
app := vars["app"]
cluster := clusterNameFromQuery(r.URL.Query())
metricsService, namespaceInfo := createMetricsServiceForNamespaceMC(w, r, promSupplier, namespace)
if metricsService == nil {
// any returned value nil means error & response already written
return
}
params := models.IstioMetricsQuery{Cluster: cluster, Namespace: namespace, App: app}
oldestNs := GetOldestNamespace(namespaceInfo)
err := extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
RespondWithJSON(w, http.StatusOK, metrics)
}
// WorkloadMetrics is the API handler to fetch metrics to be displayed, related to a single workload
func WorkloadMetrics(w http.ResponseWriter, r *http.Request) {
getWorkloadMetrics(w, r, defaultPromClientSupplier)
}
// getWorkloadMetrics (mock-friendly version)
func getWorkloadMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
vars := mux.Vars(r)
namespace := vars["namespace"]
workload := vars["workload"]
cluster := clusterNameFromQuery(r.URL.Query())
metricsService, namespaceInfo := createMetricsServiceForNamespaceMC(w, r, promSupplier, namespace)
if metricsService == nil || namespaceInfo == nil {
// any returned value nil means error & response already written
return
}
oldestNs := GetOldestNamespace(namespaceInfo)
params := models.IstioMetricsQuery{Cluster: cluster, Namespace: namespace, Workload: workload}
err := extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
RespondWithJSON(w, http.StatusOK, metrics)
}
// ServiceMetrics is the API handler to fetch metrics to be displayed, related to a single service
func ServiceMetrics(w http.ResponseWriter, r *http.Request) {
getServiceMetrics(w, r, defaultPromClientSupplier)
}
// getServiceMetrics (mock-friendly version)
func getServiceMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
vars := mux.Vars(r)
namespace := vars["namespace"]
service := vars["service"]
cluster := clusterNameFromQuery(r.URL.Query())
metricsService, namespaceInfo := createMetricsServiceForNamespaceMC(w, r, promSupplier, namespace)
if metricsService == nil {
// any returned value nil means error & response already written
return
}
oldestNs := GetOldestNamespace(namespaceInfo)
params := models.IstioMetricsQuery{Cluster: cluster, Namespace: namespace, Service: service}
err := extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
RespondWithJSON(w, http.StatusOK, metrics)
}
// AggregateMetrics is the API handler to fetch metrics to be displayed, related to a single aggregate
func AggregateMetrics(w http.ResponseWriter, r *http.Request) {
getAggregateMetrics(w, r, defaultPromClientSupplier)
}
// getServiceMetrics (mock-friendly version)
func getAggregateMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
vars := mux.Vars(r)
namespace := vars["namespace"]
aggregate := vars["aggregate"]
aggregateValue := vars["aggregateValue"]
metricsService, namespaceInfo := createMetricsServiceForNamespaceMC(w, r, promSupplier, namespace)
if metricsService == nil {
// any returned value nil means error & response already written
return
}
oldestNs := GetOldestNamespace(namespaceInfo)
params := models.IstioMetricsQuery{Namespace: namespace, Aggregate: aggregate, AggregateValue: aggregateValue}
err := extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
if params.Direction != "inbound" {
RespondWithError(w, http.StatusBadRequest, "AggregateMetrics 'direction' must be 'inbound' as the metrics are associated with inbound traffic to the destination workload.")
return
}
if params.Reporter != "destination" {
RespondWithError(w, http.StatusBadRequest, "AggregateMetrics 'reporter' must be 'destination' as the metrics are associated with inbound traffic to the destination workload.")
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
RespondWithJSON(w, http.StatusOK, metrics)
}
// NamespaceMetrics is the API handler to fetch metrics to be displayed, related to all
// services in the namespace
func NamespaceMetrics(w http.ResponseWriter, r *http.Request) {
getNamespaceMetrics(w, r, defaultPromClientSupplier)
}
// getServiceMetrics (mock-friendly version)
func getNamespaceMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
business, err := getBusiness(r)
if err != nil {
RespondWithError(w, http.StatusInternalServerError, err.Error())
return
}
vars := mux.Vars(r)
namespace := vars["namespace"]
cluster := clusterNameFromQuery(r.URL.Query())
metricsService, namespaceInfo := createMetricsServiceForNamespaceMC(w, r, promSupplier, namespace)
if metricsService == nil {
// any returned value nil means error & response already written
return
}
oldestNs := GetOldestNamespace(namespaceInfo)
params := models.IstioMetricsQuery{Cluster: cluster, Namespace: namespace}
err = extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
if isRemoteCluster := business.Mesh.IsRemoteCluster(r.Context(), cluster); !isRemoteCluster && namespace == config.Get().IstioNamespace {
controlPlaneMetrics, err := metricsService.GetControlPlaneMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
for k, v := range controlPlaneMetrics {
metrics[k] = v
}
}
RespondWithJSON(w, http.StatusOK, metrics)
}
// ClustersMetrics is the API handler to fetch metrics to be displayed, related to all
// services in provided namespaces of given cluster
func ClustersMetrics(w http.ResponseWriter, r *http.Request) {
getClustersMetrics(w, r, defaultPromClientSupplier)
}
// getClustersMetrics (mock-friendly version)
func getClustersMetrics(w http.ResponseWriter, r *http.Request, promSupplier promClientSupplier) {
query := r.URL.Query()
namespaces := query.Get("namespaces") // csl of namespaces
nss := []string{}
if len(namespaces) > 0 {
nss = strings.Split(namespaces, ",")
}
cluster := clusterNameFromQuery(query)
business, err := getBusiness(r)
if err != nil {
RespondWithError(w, http.StatusInternalServerError, err.Error())
return
}
if len(nss) == 0 {
loadedNamespaces, _ := business.Namespace.GetClusterNamespaces(r.Context(), cluster)
for _, ns := range loadedNamespaces {
nss = append(nss, ns.Name)
}
}
metricsService, namespaceInfo := createMetricsServiceForClusterMC(w, r, promSupplier, cluster, nss)
if metricsService == nil {
// any returned value nil means error & response already written
return
}
oldestNs := GetOldestNamespace(namespaceInfo)
result := models.MetricsPerNamespace{}
for _, namespace := range nss {
params := models.IstioMetricsQuery{Cluster: cluster, Namespace: namespace}
err = extractIstioMetricsQueryParams(r, ¶ms, oldestNs)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metrics, err := metricsService.GetMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
if isRemoteCluster := business.Mesh.IsRemoteCluster(r.Context(), cluster); !isRemoteCluster && namespace == config.Get().IstioNamespace {
controlPlaneMetrics, err := metricsService.GetControlPlaneMetrics(params, nil)
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
for k, v := range controlPlaneMetrics {
metrics[k] = v
}
}
if err != nil {
RespondWithError(w, http.StatusServiceUnavailable, err.Error())
return
}
result[namespace] = metrics
}
RespondWithJSON(w, http.StatusOK, result)
}
func extractIstioMetricsQueryParams(r *http.Request, q *models.IstioMetricsQuery, namespaceInfo *models.Namespace) error {
q.FillDefaults()
queryParams := r.URL.Query()
if filters, ok := queryParams["filters[]"]; ok && len(filters) > 0 {
q.Filters = filters
}
dir := queryParams.Get("direction")
if dir != "" {
if dir != "inbound" && dir != "outbound" {
return errors.New("bad request, query parameter 'direction' must be either 'inbound' or 'outbound'")
}
q.Direction = dir
}
requestProtocol := queryParams.Get("requestProtocol")
if requestProtocol != "" {
q.RequestProtocol = requestProtocol
}
reporter := queryParams.Get("reporter")
if reporter != "" {
if reporter != "source" && reporter != "destination" && reporter != "both" {
return errors.New("bad request, query parameter 'reporter' must be either 'source', 'destination' or 'both'")
}
q.Reporter = reporter
}
return extractBaseMetricsQueryParams(queryParams, &q.RangeQuery, namespaceInfo)
}
func extractBaseMetricsQueryParams(queryParams url.Values, q *prometheus.RangeQuery, namespaceInfo *models.Namespace) error {
if ri := queryParams.Get("rateInterval"); ri != "" {
q.RateInterval = ri
}
if rf := queryParams.Get("rateFunc"); rf != "" {
if rf != "rate" && rf != "irate" {
return errors.New("bad request, query parameter 'rateFunc' must be either 'rate' or 'irate'")
}
q.RateFunc = rf
}
if queryTime := queryParams.Get("queryTime"); queryTime != "" {
if num, err := strconv.ParseInt(queryTime, 10, 64); err == nil {
q.End = time.Unix(num, 0)
} else {
return errors.New("bad request, cannot parse query parameter 'queryTime'")
}
}
if dur := queryParams.Get("duration"); dur != "" {
if num, err := strconv.ParseInt(dur, 10, 64); err == nil {
duration := time.Duration(num) * time.Second
q.Start = q.End.Add(-duration)
} else {
return errors.New("bad request, cannot parse query parameter 'duration'")
}
}
if step := queryParams.Get("step"); step != "" {
if num, err := strconv.Atoi(step); err == nil {
q.Step = time.Duration(num) * time.Second
} else {
return errors.New("bad request, cannot parse query parameter 'step'")
}
}
if quantiles, ok := queryParams["quantiles[]"]; ok && len(quantiles) > 0 {
for _, quantile := range quantiles {
f, err := strconv.ParseFloat(quantile, 64)
if err != nil {
// Non parseable quantile
return errors.New("bad request, cannot parse query parameter 'quantiles', float expected")
}
if f < 0 || f > 1 {
return errors.New("bad request, invalid quantile(s): should be between 0 and 1")
}
}
q.Quantiles = quantiles
}
if avgStr := queryParams.Get("avg"); avgStr != "" {
if avg, err := strconv.ParseBool(avgStr); err == nil {
q.Avg = avg
} else {
return errors.New("bad request, cannot parse query parameter 'avg'")
}
}
if lbls, ok := queryParams["byLabels[]"]; ok && len(lbls) > 0 {
q.ByLabels = lbls
}
// If needed, adjust interval -- Make sure query won't fetch data before the namespace creation
intervalStartTime, err := util.GetStartTimeForRateInterval(q.End, q.RateInterval)
if err != nil {
return err
}
if intervalStartTime.Before(namespaceInfo.CreationTimestamp) {
q.RateInterval = fmt.Sprintf("%ds", int(q.End.Sub(namespaceInfo.CreationTimestamp).Seconds()))
intervalStartTime = namespaceInfo.CreationTimestamp
log.Debugf("[extractMetricsQueryParams] Interval set to: %v", q.RateInterval)
}
// If needed, adjust query start time (bound to namespace creation time)
intervalDuration := q.End.Sub(intervalStartTime)
allowedStart := namespaceInfo.CreationTimestamp.Add(intervalDuration)
if q.Start.Before(allowedStart) {
log.Debugf("[extractMetricsQueryParams] Requested query start time [%v] set to allowed time [%v]", q.Start, allowedStart)
q.Start = allowedStart
if q.Start.After(q.End) {
// This means that the query range does not fall in the range
// of life of the namespace. So, there are no metrics to query.
log.Debugf("[extractMetricsQueryParams] Query end time = %v; not querying metrics.", q.End)
return errors.New("after checks, query start time is after end time")
}
}
// Adjust start & end times to be a multiple of step
stepInSecs := int64(q.Step.Seconds())
q.Start = time.Unix((q.Start.Unix()/stepInSecs)*stepInSecs, 0)
return nil
}
// MetricsStats is the API handler to compute some stats based on metrics
func MetricsStats(w http.ResponseWriter, r *http.Request) {
body, err := io.ReadAll(r.Body)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
var raw models.MetricsStatsQueries
err = json.Unmarshal(body, &raw)
if err != nil {
RespondWithError(w, http.StatusBadRequest, err.Error())
return
}
metricsService, queries, warns := prepareStatsQueries(w, r, raw.Queries, defaultPromClientSupplier)
if len(queries) == 0 && warns != nil {
// All queries failed to be adjusted => return an error
handleErrorResponse(w, warns)
return
}
stats, err := metricsService.GetStats(queries)
if err != nil {
handleErrorResponse(w, err)
return
}
result := models.MetricsStatsResult{Stats: stats}
if warns != nil {
result.Warnings = warns.Strings()
}
RespondWithJSON(w, http.StatusOK, result)
}
func prepareStatsQueries(w http.ResponseWriter, r *http.Request, rawQ []models.MetricsStatsQuery, promSupplier promClientSupplier) (*business.MetricsService, []models.MetricsStatsQuery, *util.Errors) {
// Get unique namespaces list
var namespaces []models.Namespace
for _, q := range rawQ {
found := false
for _, ns := range namespaces {
if ns.Name == q.Target.Namespace {
found = true
break
}
}
if !found {
newNs := models.Namespace{Name: q.Target.Namespace, Cluster: config.GetSafeClusterName(q.Target.Cluster)}
namespaces = append(namespaces, newNs)
}
}
// Create the metrics service, along with namespaces information for adjustements
metricsService, nsInfos := createMetricsServiceForNamespaces(w, r, promSupplier, namespaces)
// Keep only valid queries (fill errors if needed) and adjust queryTime / interval
var errors util.Errors
var validQueries []models.MetricsStatsQuery
for _, q := range rawQ {
if valErr := q.Validate(); valErr != nil {
errors.Merge(valErr)
continue
}
if nsInfoErr, ok := nsInfos[q.Target.Namespace]; !ok {
errors.Add(fmt.Errorf("Missing info for namespace '%s'", q.Target.Namespace))
continue
} else if nsInfoErr.err != nil {
errors.Add(fmt.Errorf("Namespace '%s': %v", q.Target.Namespace, nsInfoErr.err))
continue
} else {
namespaceInfo := nsInfoErr.info
interval, err := util.AdjustRateInterval(namespaceInfo.CreationTimestamp, q.QueryTime, q.RawInterval)
if err != nil {
errors.Add(err)
continue
}
q.Interval = interval
if q.Interval != q.RawInterval {
log.Debugf("Rate interval for namespace %s was adjusted to %s (original = %s, query time = %v, namespace created = %v)",
q.Target.Namespace, q.Interval, q.RawInterval, q.QueryTime, namespaceInfo.CreationTimestamp)
}
validQueries = append(validQueries, q)
}
}
return metricsService, validQueries, errors.OrNil()
}