mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-20 20:10:22 +00:00
ff3e84ad67
updating kubernetes to 1.28.0 in the main repo. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
858 lines
32 KiB
Go
858 lines
32 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 metrics
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
restful "github.com/emicklei/go-restful/v3"
|
|
"k8s.io/apimachinery/pkg/apis/meta/v1/validation"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
utilsets "k8s.io/apimachinery/pkg/util/sets"
|
|
"k8s.io/apiserver/pkg/audit"
|
|
"k8s.io/apiserver/pkg/authentication/user"
|
|
"k8s.io/apiserver/pkg/endpoints/request"
|
|
"k8s.io/apiserver/pkg/endpoints/responsewriter"
|
|
compbasemetrics "k8s.io/component-base/metrics"
|
|
"k8s.io/component-base/metrics/legacyregistry"
|
|
)
|
|
|
|
// resettableCollector is the interface implemented by prometheus.MetricVec
|
|
// that can be used by Prometheus to collect metrics and reset their values.
|
|
type resettableCollector interface {
|
|
compbasemetrics.Registerable
|
|
Reset()
|
|
}
|
|
|
|
const (
|
|
APIServerComponent string = "apiserver"
|
|
OtherRequestMethod string = "other"
|
|
)
|
|
|
|
/*
|
|
* By default, all the following metrics are defined as falling under
|
|
* ALPHA stability level https://github.com/kubernetes/enhancements/blob/master/keps/sig-instrumentation/1209-metrics-stability/kubernetes-control-plane-metrics-stability.md#stability-classes)
|
|
*
|
|
* Promoting the stability level of the metric is a responsibility of the component owner, since it
|
|
* involves explicitly acknowledging support for the metric across multiple releases, in accordance with
|
|
* the metric stability policy.
|
|
*/
|
|
var (
|
|
deprecatedRequestGauge = compbasemetrics.NewGaugeVec(
|
|
&compbasemetrics.GaugeOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "requested_deprecated_apis",
|
|
Help: "Gauge of deprecated APIs that have been requested, broken out by API group, version, resource, subresource, and removed_release.",
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"group", "version", "resource", "subresource", "removed_release"},
|
|
)
|
|
|
|
// TODO(a-robinson): Add unit tests for the handling of these metrics once
|
|
// the upstream library supports it.
|
|
requestCounter = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_total",
|
|
Help: "Counter of apiserver requests broken out for each verb, dry run value, group, version, resource, scope, component, and HTTP response code.",
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"verb", "dry_run", "group", "version", "resource", "subresource", "scope", "component", "code"},
|
|
)
|
|
longRunningRequestsGauge = compbasemetrics.NewGaugeVec(
|
|
&compbasemetrics.GaugeOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "longrunning_requests",
|
|
Help: "Gauge of all active long-running apiserver requests broken out by verb, group, version, resource, scope and component. Not all requests are tracked this way.",
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope", "component"},
|
|
)
|
|
requestLatencies = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_duration_seconds",
|
|
Help: "Response latency distribution in seconds for each verb, dry run value, group, version, resource, subresource, scope and component.",
|
|
// This metric is used for verifying api call latencies SLO,
|
|
// as well as tracking regressions in this aspects.
|
|
// Thus we customize buckets significantly, to empower both usecases.
|
|
Buckets: []float64{0.005, 0.025, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.25, 1.5, 2, 3,
|
|
4, 5, 6, 8, 10, 15, 20, 30, 45, 60},
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"verb", "dry_run", "group", "version", "resource", "subresource", "scope", "component"},
|
|
)
|
|
requestSloLatencies = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_slo_duration_seconds",
|
|
Help: "Response latency distribution (not counting webhook duration and priority & fairness queue wait times) in seconds for each verb, group, version, resource, subresource, scope and component.",
|
|
// This metric is supplementary to the requestLatencies metric.
|
|
// It measures request duration excluding webhooks as they are mostly
|
|
// dependant on user configuration.
|
|
Buckets: []float64{0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.25, 1.5, 2, 3,
|
|
4, 5, 6, 8, 10, 15, 20, 30, 45, 60},
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
DeprecatedVersion: "1.27.0",
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope", "component"},
|
|
)
|
|
requestSliLatencies = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_sli_duration_seconds",
|
|
Help: "Response latency distribution (not counting webhook duration and priority & fairness queue wait times) in seconds for each verb, group, version, resource, subresource, scope and component.",
|
|
// This metric is supplementary to the requestLatencies metric.
|
|
// It measures request duration excluding webhooks as they are mostly
|
|
// dependant on user configuration.
|
|
Buckets: []float64{0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.25, 1.5, 2, 3,
|
|
4, 5, 6, 8, 10, 15, 20, 30, 45, 60},
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope", "component"},
|
|
)
|
|
fieldValidationRequestLatencies = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Name: "field_validation_request_duration_seconds",
|
|
Help: "Response latency distribution in seconds for each field validation value",
|
|
// This metric is supplementary to the requestLatencies metric.
|
|
// It measures request durations for the various field validation
|
|
// values.
|
|
Buckets: []float64{0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.25, 1.5, 2, 3,
|
|
4, 5, 6, 8, 10, 15, 20, 30, 45, 60},
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"field_validation"},
|
|
)
|
|
responseSizes = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "response_sizes",
|
|
Help: "Response size distribution in bytes for each group, version, verb, resource, subresource, scope and component.",
|
|
// Use buckets ranging from 1000 bytes (1KB) to 10^9 bytes (1GB).
|
|
Buckets: compbasemetrics.ExponentialBuckets(1000, 10.0, 7),
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope", "component"},
|
|
)
|
|
// TLSHandshakeErrors is a number of requests dropped with 'TLS handshake error from' error
|
|
TLSHandshakeErrors = compbasemetrics.NewCounter(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "tls_handshake_errors_total",
|
|
Help: "Number of requests dropped with 'TLS handshake error from' error",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
)
|
|
WatchEvents = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "watch_events_total",
|
|
Help: "Number of events sent in watch clients",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"group", "version", "kind"},
|
|
)
|
|
WatchEventsSizes = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "watch_events_sizes",
|
|
Help: "Watch event size distribution in bytes",
|
|
Buckets: compbasemetrics.ExponentialBuckets(1024, 2.0, 8), // 1K, 2K, 4K, 8K, ..., 128K.
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"group", "version", "kind"},
|
|
)
|
|
// Because of volatility of the base metric this is pre-aggregated one. Instead of reporting current usage all the time
|
|
// it reports maximal usage during the last second.
|
|
currentInflightRequests = compbasemetrics.NewGaugeVec(
|
|
&compbasemetrics.GaugeOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "current_inflight_requests",
|
|
Help: "Maximal number of currently used inflight request limit of this apiserver per request kind in last second.",
|
|
StabilityLevel: compbasemetrics.STABLE,
|
|
},
|
|
[]string{"request_kind"},
|
|
)
|
|
currentInqueueRequests = compbasemetrics.NewGaugeVec(
|
|
&compbasemetrics.GaugeOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "current_inqueue_requests",
|
|
Help: "Maximal number of queued requests in this apiserver per request kind in last second.",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"request_kind"},
|
|
)
|
|
|
|
requestTerminationsTotal = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_terminations_total",
|
|
Help: "Number of requests which apiserver terminated in self-defense.",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope", "component", "code"},
|
|
)
|
|
|
|
apiSelfRequestCounter = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "selfrequest_total",
|
|
Help: "Counter of apiserver self-requests broken out for each verb, API resource and subresource.",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"verb", "resource", "subresource"},
|
|
)
|
|
|
|
requestFilterDuration = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_filter_duration_seconds",
|
|
Help: "Request filter latency distribution in seconds, for each filter type",
|
|
Buckets: []float64{0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3, 1.0, 5.0, 10.0, 15.0, 30.0},
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"filter"},
|
|
)
|
|
|
|
// requestAbortsTotal is a number of aborted requests with http.ErrAbortHandler
|
|
requestAbortsTotal = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_aborts_total",
|
|
Help: "Number of requests which apiserver aborted possibly due to a timeout, for each group, version, verb, resource, subresource and scope",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"verb", "group", "version", "resource", "subresource", "scope"},
|
|
)
|
|
|
|
// requestPostTimeoutTotal tracks the activity of the executing request handler after the associated request
|
|
// has been timed out by the apiserver.
|
|
// source: the name of the handler that is recording this metric. Currently, we have two:
|
|
// - timeout-handler: the "executing" handler returns after the timeout filter times out the request.
|
|
// - rest-handler: the "executing" handler returns after the rest layer times out the request.
|
|
// status: whether the handler panicked or threw an error, possible values:
|
|
// - 'panic': the handler panicked
|
|
// - 'error': the handler return an error
|
|
// - 'ok': the handler returned a result (no error and no panic)
|
|
// - 'pending': the handler is still running in the background and it did not return
|
|
// within the wait threshold.
|
|
requestPostTimeoutTotal = compbasemetrics.NewCounterVec(
|
|
&compbasemetrics.CounterOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_post_timeout_total",
|
|
Help: "Tracks the activity of the request handlers after the associated requests have been timed out by the apiserver",
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
[]string{"source", "status"},
|
|
)
|
|
|
|
requestTimestampComparisonDuration = compbasemetrics.NewHistogramVec(
|
|
&compbasemetrics.HistogramOpts{
|
|
Subsystem: APIServerComponent,
|
|
Name: "request_timestamp_comparison_time",
|
|
Help: "Time taken for comparison of old vs new objects in UPDATE or PATCH requests",
|
|
Buckets: []float64{0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3, 1.0, 5.0},
|
|
StabilityLevel: compbasemetrics.ALPHA,
|
|
},
|
|
// Path the code takes to reach a conclusion:
|
|
// i.e. unequalObjectsFast, unequalObjectsSlow, equalObjectsSlow
|
|
[]string{"code_path"},
|
|
)
|
|
|
|
metrics = []resettableCollector{
|
|
deprecatedRequestGauge,
|
|
requestCounter,
|
|
longRunningRequestsGauge,
|
|
requestLatencies,
|
|
requestSloLatencies,
|
|
requestSliLatencies,
|
|
fieldValidationRequestLatencies,
|
|
responseSizes,
|
|
TLSHandshakeErrors,
|
|
WatchEvents,
|
|
WatchEventsSizes,
|
|
currentInflightRequests,
|
|
currentInqueueRequests,
|
|
requestTerminationsTotal,
|
|
apiSelfRequestCounter,
|
|
requestFilterDuration,
|
|
requestAbortsTotal,
|
|
requestPostTimeoutTotal,
|
|
requestTimestampComparisonDuration,
|
|
}
|
|
|
|
// these are the valid request methods which we report in our metrics. Any other request methods
|
|
// will be aggregated under 'unknown'
|
|
validRequestMethods = utilsets.NewString(
|
|
"APPLY",
|
|
"CONNECT",
|
|
"CREATE",
|
|
"DELETE",
|
|
"DELETECOLLECTION",
|
|
"GET",
|
|
"LIST",
|
|
"PATCH",
|
|
"POST",
|
|
"PROXY",
|
|
"PUT",
|
|
"UPDATE",
|
|
"WATCH",
|
|
"WATCHLIST")
|
|
|
|
// These are the valid connect requests which we report in our metrics.
|
|
validConnectRequests = utilsets.NewString(
|
|
"log",
|
|
"exec",
|
|
"portforward",
|
|
"attach",
|
|
"proxy")
|
|
)
|
|
|
|
const (
|
|
// ReadOnlyKind is a string identifying read only request kind
|
|
ReadOnlyKind = "readOnly"
|
|
// MutatingKind is a string identifying mutating request kind
|
|
MutatingKind = "mutating"
|
|
|
|
// WaitingPhase is the phase value for a request waiting in a queue
|
|
WaitingPhase = "waiting"
|
|
// ExecutingPhase is the phase value for an executing request
|
|
ExecutingPhase = "executing"
|
|
)
|
|
|
|
const (
|
|
// deprecatedAnnotationKey is a key for an audit annotation set to
|
|
// "true" on requests made to deprecated API versions
|
|
deprecatedAnnotationKey = "k8s.io/deprecated"
|
|
// removedReleaseAnnotationKey is a key for an audit annotation set to
|
|
// the target removal release, in "<major>.<minor>" format,
|
|
// on requests made to deprecated API versions with a target removal release
|
|
removedReleaseAnnotationKey = "k8s.io/removed-release"
|
|
)
|
|
|
|
const (
|
|
// The source that is recording the apiserver_request_post_timeout_total metric.
|
|
// The "executing" request handler returns after the timeout filter times out the request.
|
|
PostTimeoutSourceTimeoutHandler = "timeout-handler"
|
|
|
|
// The source that is recording the apiserver_request_post_timeout_total metric.
|
|
// The "executing" request handler returns after the rest layer times out the request.
|
|
PostTimeoutSourceRestHandler = "rest-handler"
|
|
)
|
|
|
|
const (
|
|
// The executing request handler panicked after the request had
|
|
// been timed out by the apiserver.
|
|
PostTimeoutHandlerPanic = "panic"
|
|
|
|
// The executing request handler has returned an error to the post-timeout
|
|
// receiver after the request had been timed out by the apiserver.
|
|
PostTimeoutHandlerError = "error"
|
|
|
|
// The executing request handler has returned a result to the post-timeout
|
|
// receiver after the request had been timed out by the apiserver.
|
|
PostTimeoutHandlerOK = "ok"
|
|
|
|
// The executing request handler has not panicked or returned any error/result to
|
|
// the post-timeout receiver yet after the request had been timed out by the apiserver.
|
|
// The post-timeout receiver gives up after waiting for certain threshold and if the
|
|
// executing request handler has not returned yet we use the following label.
|
|
PostTimeoutHandlerPending = "pending"
|
|
)
|
|
|
|
var registerMetrics sync.Once
|
|
|
|
// Register all metrics.
|
|
func Register() {
|
|
registerMetrics.Do(func() {
|
|
for _, metric := range metrics {
|
|
legacyregistry.MustRegister(metric)
|
|
}
|
|
})
|
|
}
|
|
|
|
// Reset all metrics.
|
|
func Reset() {
|
|
for _, metric := range metrics {
|
|
metric.Reset()
|
|
}
|
|
}
|
|
|
|
// UpdateInflightRequestMetrics reports concurrency metrics classified by
|
|
// mutating vs Readonly.
|
|
func UpdateInflightRequestMetrics(phase string, nonmutating, mutating int) {
|
|
for _, kc := range []struct {
|
|
kind string
|
|
count int
|
|
}{{ReadOnlyKind, nonmutating}, {MutatingKind, mutating}} {
|
|
if phase == ExecutingPhase {
|
|
currentInflightRequests.WithLabelValues(kc.kind).Set(float64(kc.count))
|
|
} else {
|
|
currentInqueueRequests.WithLabelValues(kc.kind).Set(float64(kc.count))
|
|
}
|
|
}
|
|
}
|
|
|
|
func RecordFilterLatency(ctx context.Context, name string, elapsed time.Duration) {
|
|
requestFilterDuration.WithContext(ctx).WithLabelValues(name).Observe(elapsed.Seconds())
|
|
}
|
|
|
|
func RecordTimestampComparisonLatency(codePath string, elapsed time.Duration) {
|
|
requestTimestampComparisonDuration.WithLabelValues(codePath).Observe(elapsed.Seconds())
|
|
}
|
|
|
|
func RecordRequestPostTimeout(source string, status string) {
|
|
requestPostTimeoutTotal.WithLabelValues(source, status).Inc()
|
|
}
|
|
|
|
// RecordRequestAbort records that the request was aborted possibly due to a timeout.
|
|
func RecordRequestAbort(req *http.Request, requestInfo *request.RequestInfo) {
|
|
if requestInfo == nil {
|
|
requestInfo = &request.RequestInfo{Verb: req.Method, Path: req.URL.Path}
|
|
}
|
|
|
|
scope := CleanScope(requestInfo)
|
|
reportedVerb := cleanVerb(CanonicalVerb(strings.ToUpper(req.Method), scope), "", req, requestInfo)
|
|
resource := requestInfo.Resource
|
|
subresource := requestInfo.Subresource
|
|
group := requestInfo.APIGroup
|
|
version := requestInfo.APIVersion
|
|
|
|
requestAbortsTotal.WithContext(req.Context()).WithLabelValues(reportedVerb, group, version, resource, subresource, scope).Inc()
|
|
}
|
|
|
|
// RecordDroppedRequest records that the request was rejected via http.TooManyRequests.
|
|
func RecordDroppedRequest(req *http.Request, requestInfo *request.RequestInfo, component string, isMutatingRequest bool) {
|
|
if requestInfo == nil {
|
|
requestInfo = &request.RequestInfo{Verb: req.Method, Path: req.URL.Path}
|
|
}
|
|
scope := CleanScope(requestInfo)
|
|
dryRun := cleanDryRun(req.URL)
|
|
|
|
// We don't use verb from <requestInfo>, as this may be propagated from
|
|
// InstrumentRouteFunc which is registered in installer.go with predefined
|
|
// list of verbs (different than those translated to RequestInfo).
|
|
// However, we need to tweak it e.g. to differentiate GET from LIST.
|
|
reportedVerb := cleanVerb(CanonicalVerb(strings.ToUpper(req.Method), scope), "", req, requestInfo)
|
|
|
|
if requestInfo.IsResourceRequest {
|
|
requestCounter.WithContext(req.Context()).WithLabelValues(reportedVerb, dryRun, requestInfo.APIGroup, requestInfo.APIVersion, requestInfo.Resource, requestInfo.Subresource, scope, component, codeToString(http.StatusTooManyRequests)).Inc()
|
|
} else {
|
|
requestCounter.WithContext(req.Context()).WithLabelValues(reportedVerb, dryRun, "", "", "", requestInfo.Subresource, scope, component, codeToString(http.StatusTooManyRequests)).Inc()
|
|
}
|
|
}
|
|
|
|
// RecordRequestTermination records that the request was terminated early as part of a resource
|
|
// preservation or apiserver self-defense mechanism (e.g. timeouts, maxinflight throttling,
|
|
// proxyHandler errors). RecordRequestTermination should only be called zero or one times
|
|
// per request.
|
|
func RecordRequestTermination(req *http.Request, requestInfo *request.RequestInfo, component string, code int) {
|
|
if requestInfo == nil {
|
|
requestInfo = &request.RequestInfo{Verb: req.Method, Path: req.URL.Path}
|
|
}
|
|
scope := CleanScope(requestInfo)
|
|
|
|
// We don't use verb from <requestInfo>, as this may be propagated from
|
|
// InstrumentRouteFunc which is registered in installer.go with predefined
|
|
// list of verbs (different than those translated to RequestInfo).
|
|
// However, we need to tweak it e.g. to differentiate GET from LIST.
|
|
reportedVerb := cleanVerb(CanonicalVerb(strings.ToUpper(req.Method), scope), "", req, requestInfo)
|
|
|
|
if requestInfo.IsResourceRequest {
|
|
requestTerminationsTotal.WithContext(req.Context()).WithLabelValues(reportedVerb, requestInfo.APIGroup, requestInfo.APIVersion, requestInfo.Resource, requestInfo.Subresource, scope, component, codeToString(code)).Inc()
|
|
} else {
|
|
requestTerminationsTotal.WithContext(req.Context()).WithLabelValues(reportedVerb, "", "", "", requestInfo.Path, scope, component, codeToString(code)).Inc()
|
|
}
|
|
}
|
|
|
|
// RecordLongRunning tracks the execution of a long running request against the API server. It provides an accurate count
|
|
// of the total number of open long running requests. requestInfo may be nil if the caller is not in the normal request flow.
|
|
func RecordLongRunning(req *http.Request, requestInfo *request.RequestInfo, component string, fn func()) {
|
|
if requestInfo == nil {
|
|
requestInfo = &request.RequestInfo{Verb: req.Method, Path: req.URL.Path}
|
|
}
|
|
var g compbasemetrics.GaugeMetric
|
|
scope := CleanScope(requestInfo)
|
|
|
|
// We don't use verb from <requestInfo>, as this may be propagated from
|
|
// InstrumentRouteFunc which is registered in installer.go with predefined
|
|
// list of verbs (different than those translated to RequestInfo).
|
|
// However, we need to tweak it e.g. to differentiate GET from LIST.
|
|
reportedVerb := cleanVerb(CanonicalVerb(strings.ToUpper(req.Method), scope), "", req, requestInfo)
|
|
|
|
if requestInfo.IsResourceRequest {
|
|
g = longRunningRequestsGauge.WithContext(req.Context()).WithLabelValues(reportedVerb, requestInfo.APIGroup, requestInfo.APIVersion, requestInfo.Resource, requestInfo.Subresource, scope, component)
|
|
} else {
|
|
g = longRunningRequestsGauge.WithContext(req.Context()).WithLabelValues(reportedVerb, "", "", "", requestInfo.Path, scope, component)
|
|
}
|
|
g.Inc()
|
|
defer g.Dec()
|
|
fn()
|
|
}
|
|
|
|
// MonitorRequest handles standard transformations for client and the reported verb and then invokes Monitor to record
|
|
// a request. verb must be uppercase to be backwards compatible with existing monitoring tooling.
|
|
func MonitorRequest(req *http.Request, verb, group, version, resource, subresource, scope, component string, deprecated bool, removedRelease string, httpCode, respSize int, elapsed time.Duration) {
|
|
requestInfo, ok := request.RequestInfoFrom(req.Context())
|
|
if !ok || requestInfo == nil {
|
|
requestInfo = &request.RequestInfo{Verb: req.Method, Path: req.URL.Path}
|
|
}
|
|
// We don't use verb from <requestInfo>, as this may be propagated from
|
|
// InstrumentRouteFunc which is registered in installer.go with predefined
|
|
// list of verbs (different than those translated to RequestInfo).
|
|
// However, we need to tweak it e.g. to differentiate GET from LIST.
|
|
reportedVerb := cleanVerb(CanonicalVerb(strings.ToUpper(req.Method), scope), verb, req, requestInfo)
|
|
|
|
dryRun := cleanDryRun(req.URL)
|
|
elapsedSeconds := elapsed.Seconds()
|
|
requestCounter.WithContext(req.Context()).WithLabelValues(reportedVerb, dryRun, group, version, resource, subresource, scope, component, codeToString(httpCode)).Inc()
|
|
// MonitorRequest happens after authentication, so we can trust the username given by the request
|
|
info, ok := request.UserFrom(req.Context())
|
|
if ok && info.GetName() == user.APIServerUser {
|
|
apiSelfRequestCounter.WithContext(req.Context()).WithLabelValues(reportedVerb, resource, subresource).Inc()
|
|
}
|
|
if deprecated {
|
|
deprecatedRequestGauge.WithContext(req.Context()).WithLabelValues(group, version, resource, subresource, removedRelease).Set(1)
|
|
audit.AddAuditAnnotation(req.Context(), deprecatedAnnotationKey, "true")
|
|
if len(removedRelease) > 0 {
|
|
audit.AddAuditAnnotation(req.Context(), removedReleaseAnnotationKey, removedRelease)
|
|
}
|
|
}
|
|
requestLatencies.WithContext(req.Context()).WithLabelValues(reportedVerb, dryRun, group, version, resource, subresource, scope, component).Observe(elapsedSeconds)
|
|
fieldValidation := cleanFieldValidation(req.URL)
|
|
fieldValidationRequestLatencies.WithContext(req.Context()).WithLabelValues(fieldValidation)
|
|
|
|
if wd, ok := request.LatencyTrackersFrom(req.Context()); ok {
|
|
sliLatency := elapsedSeconds - (wd.MutatingWebhookTracker.GetLatency() + wd.ValidatingWebhookTracker.GetLatency() + wd.APFQueueWaitTracker.GetLatency()).Seconds()
|
|
requestSloLatencies.WithContext(req.Context()).WithLabelValues(reportedVerb, group, version, resource, subresource, scope, component).Observe(sliLatency)
|
|
requestSliLatencies.WithContext(req.Context()).WithLabelValues(reportedVerb, group, version, resource, subresource, scope, component).Observe(sliLatency)
|
|
}
|
|
// We are only interested in response sizes of read requests.
|
|
if verb == "GET" || verb == "LIST" {
|
|
responseSizes.WithContext(req.Context()).WithLabelValues(reportedVerb, group, version, resource, subresource, scope, component).Observe(float64(respSize))
|
|
}
|
|
}
|
|
|
|
// InstrumentRouteFunc works like Prometheus' InstrumentHandlerFunc but wraps
|
|
// the go-restful RouteFunction instead of a HandlerFunc plus some Kubernetes endpoint specific information.
|
|
func InstrumentRouteFunc(verb, group, version, resource, subresource, scope, component string, deprecated bool, removedRelease string, routeFunc restful.RouteFunction) restful.RouteFunction {
|
|
return restful.RouteFunction(func(req *restful.Request, response *restful.Response) {
|
|
requestReceivedTimestamp, ok := request.ReceivedTimestampFrom(req.Request.Context())
|
|
if !ok {
|
|
requestReceivedTimestamp = time.Now()
|
|
}
|
|
|
|
delegate := &ResponseWriterDelegator{ResponseWriter: response.ResponseWriter}
|
|
|
|
rw := responsewriter.WrapForHTTP1Or2(delegate)
|
|
response.ResponseWriter = rw
|
|
|
|
routeFunc(req, response)
|
|
|
|
MonitorRequest(req.Request, verb, group, version, resource, subresource, scope, component, deprecated, removedRelease, delegate.Status(), delegate.ContentLength(), time.Since(requestReceivedTimestamp))
|
|
})
|
|
}
|
|
|
|
// InstrumentHandlerFunc works like Prometheus' InstrumentHandlerFunc but adds some Kubernetes endpoint specific information.
|
|
func InstrumentHandlerFunc(verb, group, version, resource, subresource, scope, component string, deprecated bool, removedRelease string, handler http.HandlerFunc) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, req *http.Request) {
|
|
requestReceivedTimestamp, ok := request.ReceivedTimestampFrom(req.Context())
|
|
if !ok {
|
|
requestReceivedTimestamp = time.Now()
|
|
}
|
|
|
|
delegate := &ResponseWriterDelegator{ResponseWriter: w}
|
|
w = responsewriter.WrapForHTTP1Or2(delegate)
|
|
|
|
handler(w, req)
|
|
|
|
MonitorRequest(req, verb, group, version, resource, subresource, scope, component, deprecated, removedRelease, delegate.Status(), delegate.ContentLength(), time.Since(requestReceivedTimestamp))
|
|
}
|
|
}
|
|
|
|
// NormalizedVerb returns normalized verb
|
|
func NormalizedVerb(req *http.Request) string {
|
|
verb := req.Method
|
|
requestInfo, ok := request.RequestInfoFrom(req.Context())
|
|
if ok {
|
|
// If we can find a requestInfo, we can get a scope, and then
|
|
// we can convert GETs to LISTs when needed.
|
|
scope := CleanScope(requestInfo)
|
|
verb = CanonicalVerb(strings.ToUpper(verb), scope)
|
|
}
|
|
|
|
// mark APPLY requests, WATCH requests and CONNECT requests correctly.
|
|
return CleanVerb(verb, req, requestInfo)
|
|
}
|
|
|
|
// CleanScope returns the scope of the request.
|
|
func CleanScope(requestInfo *request.RequestInfo) string {
|
|
if requestInfo.Name != "" || requestInfo.Verb == "create" {
|
|
return "resource"
|
|
}
|
|
if requestInfo.Namespace != "" {
|
|
return "namespace"
|
|
}
|
|
if requestInfo.IsResourceRequest {
|
|
return "cluster"
|
|
}
|
|
// this is the empty scope
|
|
return ""
|
|
}
|
|
|
|
// CanonicalVerb distinguishes LISTs from GETs (and HEADs). It assumes verb is
|
|
// UPPERCASE.
|
|
func CanonicalVerb(verb string, scope string) string {
|
|
switch verb {
|
|
case "GET", "HEAD":
|
|
if scope != "resource" && scope != "" {
|
|
return "LIST"
|
|
}
|
|
return "GET"
|
|
default:
|
|
return verb
|
|
}
|
|
}
|
|
|
|
// CleanVerb returns a normalized verb, so that it is easy to tell WATCH from
|
|
// LIST, APPLY from PATCH and CONNECT from others.
|
|
func CleanVerb(verb string, request *http.Request, requestInfo *request.RequestInfo) string {
|
|
reportedVerb := verb
|
|
if suggestedVerb := getVerbIfWatch(request); suggestedVerb == "WATCH" {
|
|
reportedVerb = "WATCH"
|
|
}
|
|
// normalize the legacy WATCHLIST to WATCH to ensure users aren't surprised by metrics
|
|
if verb == "WATCHLIST" {
|
|
reportedVerb = "WATCH"
|
|
}
|
|
if verb == "PATCH" && request.Header.Get("Content-Type") == string(types.ApplyPatchType) {
|
|
reportedVerb = "APPLY"
|
|
}
|
|
if requestInfo != nil && requestInfo.IsResourceRequest && len(requestInfo.Subresource) > 0 && validConnectRequests.Has(requestInfo.Subresource) {
|
|
reportedVerb = "CONNECT"
|
|
}
|
|
return reportedVerb
|
|
}
|
|
|
|
// cleanVerb additionally ensures that unknown verbs don't clog up the metrics.
|
|
func cleanVerb(verb, suggestedVerb string, request *http.Request, requestInfo *request.RequestInfo) string {
|
|
// CanonicalVerb (being an input for this function) doesn't handle correctly the
|
|
// deprecated path pattern for watch of:
|
|
// GET /api/{version}/watch/{resource}
|
|
// We correct it manually based on the pass verb from the installer.
|
|
if suggestedVerb == "WATCH" || suggestedVerb == "WATCHLIST" {
|
|
return "WATCH"
|
|
}
|
|
reportedVerb := CleanVerb(verb, request, requestInfo)
|
|
if validRequestMethods.Has(reportedVerb) {
|
|
return reportedVerb
|
|
}
|
|
return OtherRequestMethod
|
|
}
|
|
|
|
// getVerbIfWatch additionally ensures that GET or List would be transformed to WATCH
|
|
func getVerbIfWatch(req *http.Request) string {
|
|
if strings.ToUpper(req.Method) == "GET" || strings.ToUpper(req.Method) == "LIST" {
|
|
// see apimachinery/pkg/runtime/conversion.go Convert_Slice_string_To_bool
|
|
if values := req.URL.Query()["watch"]; len(values) > 0 {
|
|
if value := strings.ToLower(values[0]); value != "0" && value != "false" {
|
|
return "WATCH"
|
|
}
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func cleanDryRun(u *url.URL) string {
|
|
// avoid allocating when we don't see dryRun in the query
|
|
if !strings.Contains(u.RawQuery, "dryRun") {
|
|
return ""
|
|
}
|
|
dryRun := u.Query()["dryRun"]
|
|
if errs := validation.ValidateDryRun(nil, dryRun); len(errs) > 0 {
|
|
return "invalid"
|
|
}
|
|
// Since dryRun could be valid with any arbitrarily long length
|
|
// we have to dedup and sort the elements before joining them together
|
|
// TODO: this is a fairly large allocation for what it does, consider
|
|
// a sort and dedup in a single pass
|
|
return strings.Join(utilsets.NewString(dryRun...).List(), ",")
|
|
}
|
|
|
|
func cleanFieldValidation(u *url.URL) string {
|
|
// avoid allocating when we don't see dryRun in the query
|
|
if !strings.Contains(u.RawQuery, "fieldValidation") {
|
|
return ""
|
|
}
|
|
fieldValidation := u.Query()["fieldValidation"]
|
|
if len(fieldValidation) != 1 {
|
|
return "invalid"
|
|
}
|
|
if errs := validation.ValidateFieldValidation(nil, fieldValidation[0]); len(errs) > 0 {
|
|
return "invalid"
|
|
}
|
|
return fieldValidation[0]
|
|
}
|
|
|
|
var _ http.ResponseWriter = (*ResponseWriterDelegator)(nil)
|
|
var _ responsewriter.UserProvidedDecorator = (*ResponseWriterDelegator)(nil)
|
|
|
|
// ResponseWriterDelegator interface wraps http.ResponseWriter to additionally record content-length, status-code, etc.
|
|
type ResponseWriterDelegator struct {
|
|
http.ResponseWriter
|
|
|
|
status int
|
|
written int64
|
|
wroteHeader bool
|
|
}
|
|
|
|
func (r *ResponseWriterDelegator) Unwrap() http.ResponseWriter {
|
|
return r.ResponseWriter
|
|
}
|
|
|
|
func (r *ResponseWriterDelegator) WriteHeader(code int) {
|
|
r.status = code
|
|
r.wroteHeader = true
|
|
r.ResponseWriter.WriteHeader(code)
|
|
}
|
|
|
|
func (r *ResponseWriterDelegator) Write(b []byte) (int, error) {
|
|
if !r.wroteHeader {
|
|
r.WriteHeader(http.StatusOK)
|
|
}
|
|
n, err := r.ResponseWriter.Write(b)
|
|
r.written += int64(n)
|
|
return n, err
|
|
}
|
|
|
|
func (r *ResponseWriterDelegator) Status() int {
|
|
return r.status
|
|
}
|
|
|
|
func (r *ResponseWriterDelegator) ContentLength() int {
|
|
return int(r.written)
|
|
}
|
|
|
|
// Small optimization over Itoa
|
|
func codeToString(s int) string {
|
|
switch s {
|
|
case 100:
|
|
return "100"
|
|
case 101:
|
|
return "101"
|
|
|
|
case 200:
|
|
return "200"
|
|
case 201:
|
|
return "201"
|
|
case 202:
|
|
return "202"
|
|
case 203:
|
|
return "203"
|
|
case 204:
|
|
return "204"
|
|
case 205:
|
|
return "205"
|
|
case 206:
|
|
return "206"
|
|
|
|
case 300:
|
|
return "300"
|
|
case 301:
|
|
return "301"
|
|
case 302:
|
|
return "302"
|
|
case 304:
|
|
return "304"
|
|
case 305:
|
|
return "305"
|
|
case 307:
|
|
return "307"
|
|
|
|
case 400:
|
|
return "400"
|
|
case 401:
|
|
return "401"
|
|
case 402:
|
|
return "402"
|
|
case 403:
|
|
return "403"
|
|
case 404:
|
|
return "404"
|
|
case 405:
|
|
return "405"
|
|
case 406:
|
|
return "406"
|
|
case 407:
|
|
return "407"
|
|
case 408:
|
|
return "408"
|
|
case 409:
|
|
return "409"
|
|
case 410:
|
|
return "410"
|
|
case 411:
|
|
return "411"
|
|
case 412:
|
|
return "412"
|
|
case 413:
|
|
return "413"
|
|
case 414:
|
|
return "414"
|
|
case 415:
|
|
return "415"
|
|
case 416:
|
|
return "416"
|
|
case 417:
|
|
return "417"
|
|
case 418:
|
|
return "418"
|
|
|
|
case 500:
|
|
return "500"
|
|
case 501:
|
|
return "501"
|
|
case 502:
|
|
return "502"
|
|
case 503:
|
|
return "503"
|
|
case 504:
|
|
return "504"
|
|
case 505:
|
|
return "505"
|
|
|
|
case 428:
|
|
return "428"
|
|
case 429:
|
|
return "429"
|
|
case 431:
|
|
return "431"
|
|
case 511:
|
|
return "511"
|
|
|
|
default:
|
|
return strconv.Itoa(s)
|
|
}
|
|
}
|