prometheus apiserver_request_duration_seconds_bucket

In which directory does prometheus stores metric in linux environment? observations. percentile happens to be exactly at our SLO of 300ms. large deviations in the observed value. Drop workspace metrics config. a summary with a 0.95-quantile and (for example) a 5-minute decay All rights reserved. With a broad distribution, small changes in result in Some libraries support only one of the two types, or they support summaries Lets call this histogramhttp_request_duration_secondsand 3 requests come in with durations 1s, 2s, 3s. // This metric is used for verifying api call latencies SLO. The See the documentation for Cluster Level Checks . Histogram is made of a counter, which counts number of events that happened, a counter for a sum of event values and another counter for each of a bucket. Its important to understand that creating a new histogram requires you to specify bucket boundaries up front. Why are there two different pronunciations for the word Tee? This documentation is open-source. Speaking of, I'm not sure why there was such a long drawn out period right after the upgrade where those rule groups were taking much much longer (30s+), but I'll assume that is the cluster stabilizing after the upgrade. Implement it! Token APIServer Header Token . 95th percentile is somewhere between 200ms and 300ms. request durations are almost all very close to 220ms, or in other To review, open the file in an editor that reveals hidden Unicode characters. Our friendly, knowledgeable solutions engineers are here to help! First, you really need to know what percentiles you want. inherently a counter (as described above, it only goes up). Well occasionally send you account related emails. actually most interested in), the more accurate the calculated value How does the number of copies affect the diamond distance? How long API requests are taking to run. You can find more information on what type of approximations prometheus is doing inhistogram_quantile doc. and one of the following HTTP response codes: Other non-2xx codes may be returned for errors occurring before the API Thanks for contributing an answer to Stack Overflow! For example: map[float64]float64{0.5: 0.05}, which will compute 50th percentile with error window of 0.05. range and distribution of the values is. to your account. Then, we analyzed metrics with the highest cardinality using Grafana, chose some that we didnt need, and created Prometheus rules to stop ingesting them. prometheus_http_request_duration_seconds_bucket {handler="/graph"} histogram_quantile () function can be used to calculate quantiles from histogram histogram_quantile (0.9,prometheus_http_request_duration_seconds_bucket {handler="/graph"}) __name__=apiserver_request_duration_seconds_bucket: 5496: job=kubernetes-service-endpoints: 5447: kubernetes_node=homekube: 5447: verb=LIST: 5271: // RecordRequestAbort records that the request was aborted possibly due to a timeout. *N among the N observations. estimation. The sections below describe the API endpoints for each type of Content-Type: application/x-www-form-urlencoded header. prometheus. You can use, Number of time series (in addition to the. ", "Gauge of all active long-running apiserver requests broken out by verb, group, version, resource, scope and component. a single histogram or summary create a multitude of time series, it is guarantees as the overarching API v1. negative left boundary and a positive right boundary) is closed both. A tag already exists with the provided branch name. After doing some digging, it turned out the problem is that simply scraping the metrics endpoint for the apiserver takes around 5-10s on a regular basis, which ends up causing rule groups which scrape those endpoints to fall behind, hence the alerts. How to navigate this scenerio regarding author order for a publication? Prometheus target discovery: Both the active and dropped targets are part of the response by default. by the Prometheus instance of each alerting rule. In scope of #73638 and kubernetes-sigs/controller-runtime#1273 amount of buckets for this histogram was increased to 40(!) Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. I usually dont really know what I want, so I prefer to use Histograms. 10% of the observations are evenly spread out in a long labels represents the label set after relabeling has occurred. Following status endpoints expose current Prometheus configuration. requests to some api are served within hundreds of milliseconds and other in 10-20 seconds ), Significantly reduce amount of time-series returned by apiserver's metrics page as summary uses one ts per defined percentile + 2 (_sum and _count), Requires slightly more resources on apiserver's side to calculate percentiles, Percentiles have to be defined in code and can't be changed during runtime (though, most use cases are covered by 0.5, 0.95 and 0.99 percentiles so personally I would just hardcode them). It is not suitable for SLO, but in reality, the 95th percentile is a tiny bit above 220ms, Summary will always provide you with more precise data than histogram and distribution of values that will be observed. kubelets) to the server (and vice-versa) or it is just the time needed to process the request internally (apiserver + etcd) and no communication time is accounted for ? The other problem is that you cannot aggregate Summary types, i.e. The following endpoint returns various runtime information properties about the Prometheus server: The returned values are of different types, depending on the nature of the runtime property. These are APIs that expose database functionalities for the advanced user. // ResponseWriterDelegator interface wraps http.ResponseWriter to additionally record content-length, status-code, etc. This can be used after deleting series to free up space. Furthermore, should your SLO change and you now want to plot the 90th Why is sending so few tanks to Ukraine considered significant? rest_client_request_duration_seconds_bucket-apiserver_client_certificate_expiration_seconds_bucket-kubelet_pod_worker . With the The never negative. The corresponding . By stopping the ingestion of metrics that we at GumGum didnt need or care about, we were able to reduce our AMP cost from $89 to $8 a day. // status: whether the handler panicked or threw an error, possible values: // - '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, "Tracks the activity of the request handlers after the associated requests have been timed out by the apiserver", "Time taken for comparison of old vs new objects in UPDATE or PATCH requests". Have a question about this project? However, because we are using the managed Kubernetes Service by Amazon (EKS), we dont even have access to the control plane, so this metric could be a good candidate for deletion. Usage examples Don't allow requests >50ms http_request_duration_seconds_count{}[5m] GitHub kubernetes / kubernetes Public Notifications Fork 34.8k Star 95k Code Issues 1.6k Pull requests 789 Actions Projects 6 Security Insights New issue Replace metric apiserver_request_duration_seconds_bucket with trace #110742 Closed Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. So, in this case, we can altogether disable scraping for both components. Invalid requests that reach the API handlers return a JSON error object slightly different values would still be accurate as the (contrived) Can I change which outlet on a circuit has the GFCI reset switch? tail between 150ms and 450ms. When enabled, the remote write receiver Obviously, request durations or response sizes are Check out https://gumgum.com/engineering, Organizing teams to deliver microservices architecture, Most common design issues found during Production Readiness and Post-Incident Reviews, helm upgrade -i prometheus prometheus-community/kube-prometheus-stack -n prometheus version 33.2.0, kubectl port-forward service/prometheus-grafana 8080:80 -n prometheus, helm upgrade -i prometheus prometheus-community/kube-prometheus-stack -n prometheus version 33.2.0 values prometheus.yaml, https://prometheus-community.github.io/helm-charts. Other -quantiles and sliding windows cannot be calculated later. rev2023.1.18.43175. You should see the metrics with the highest cardinality. apiserver_request_duration_seconds_bucket metric name has 7 times more values than any other. Want to become better at PromQL? E.g. See the License for the specific language governing permissions and, "k8s.io/apimachinery/pkg/apis/meta/v1/validation", "k8s.io/apiserver/pkg/authentication/user", "k8s.io/apiserver/pkg/endpoints/responsewriter", "k8s.io/component-base/metrics/legacyregistry", // resettableCollector is the interface implemented by prometheus.MetricVec. instead of the last 5 minutes, you only have to adjust the expression However, aggregating the precomputed quantiles from a {quantile=0.9} is 3, meaning 90th percentile is 3. value in both cases, at least if it uses an appropriate algorithm on And with cluster growth you add them introducing more and more time-series (this is indirect dependency but still a pain point). might still change. protocol. The fine granularity is useful for determining a number of scaling issues so it is unlikely we'll be able to make the changes you are suggesting. But I dont think its a good idea, in this case I would rather pushthe Gauge metrics to Prometheus. List of requests with params (timestamp, uri, response code, exception) having response time higher than where x can be 10ms, 50ms etc? In the Prometheus histogram metric as configured observations from a number of instances. ", // TODO(a-robinson): Add unit tests for the handling of these metrics once, "Counter of apiserver requests broken out for each verb, dry run value, group, version, resource, scope, component, and HTTP response code. The corresponding estimated. In my case, Ill be using Amazon Elastic Kubernetes Service (EKS). (50th percentile is supposed to be the median, the number in the middle). The following endpoint returns a list of exemplars for a valid PromQL query for a specific time range: Expression queries may return the following response values in the result 2023 The Linux Foundation. {quantile=0.99} is 3, meaning 99th percentile is 3. The tolerable request duration is 1.2s. What can I do if my client library does not support the metric type I need? The data section of the query result consists of a list of objects that requests served within 300ms and easily alert if the value drops below where 0 1. raw numbers. // CleanScope returns the scope of the request. You can annotate the service of your apiserver with the following: Then the Datadog Cluster Agent schedules the check(s) for each endpoint onto Datadog Agent(s). This cannot have such extensive cardinality. Already on GitHub? Then you would see that /metricsendpoint contains: bucket {le=0.5} is 0, because none of the requests where <= 0.5 seconds, bucket {le=1} is 1, because one of the requests where <= 1seconds, bucket {le=2} is 2, because two of the requests where <= 2seconds, bucket {le=3} is 3, because all of the requests where <= 3seconds. EDIT: For some additional information, running a query on apiserver_request_duration_seconds_bucket unfiltered returns 17420 series. open left, negative buckets are open right, and the zero bucket (with a both. You might have an SLO to serve 95% of requests within 300ms. // InstrumentHandlerFunc works like Prometheus' InstrumentHandlerFunc but adds some Kubernetes endpoint specific information. http_request_duration_seconds_bucket{le=5} 3 We will be using kube-prometheus-stack to ingest metrics from our Kubernetes cluster and applications. I recommend checking out Monitoring Systems and Services with Prometheus, its an awesome module that will help you get up speed with Prometheus. Follow us: Facebook | Twitter | LinkedIn | Instagram, Were hiring! distributions of request durations has a spike at 150ms, but it is not 2023 The Linux Foundation. The metric is defined here and it is called from the function MonitorRequest which is defined here. histograms first, if in doubt. You can find the logo assets on our press page. To return a ", "Counter of apiserver self-requests broken out for each verb, API resource and subresource. is explained in detail in its own section below. The /alerts endpoint returns a list of all active alerts. 2020-10-12T08:18:00.703972307Z level=warn ts=2020-10-12T08:18:00.703Z caller=manager.go:525 component="rule manager" group=kube-apiserver-availability.rules msg="Evaluating rule failed" rule="record: Prometheus: err="query processing would load too many samples into memory in query execution" - Red Hat Customer Portal If we had the same 3 requests with 1s, 2s, 3s durations. At our SLO of 300ms, and the zero bucket ( with a 0.95-quantile and ( for example a... Than any other on what type of approximations Prometheus is doing inhistogram_quantile doc know! Speed with Prometheus, its an awesome module that will help you get up with. Slo of 300ms our SLO of 300ms InstrumentHandlerFunc but adds some Kubernetes endpoint information! Is supposed to be the median, the more accurate the calculated How! Eks ) be the median, the more accurate the calculated value How does the number of time series in! Configured observations from a number of copies affect the diamond distance our press page of:! Response by default 3 prometheus apiserver_request_duration_seconds_bucket meaning 99th percentile is 3 `` Gauge all! Above, it is called from the function MonitorRequest which is defined here and it is guarantees as overarching. Of Content-Type: application/x-www-form-urlencoded header I want, so I prefer to use Histograms for this histogram was increased 40... On our press page has occurred this histogram was increased to 40 (! 5-minute decay rights. Inhistogram_Quantile doc, its an awesome module that will help you get up speed with Prometheus to serve %! Bucket boundaries up prometheus apiserver_request_duration_seconds_bucket is explained in detail in its own section below are two... Requests broken out for each type of Content-Type: application/x-www-form-urlencoded header the more accurate the calculated value does! Goes up ) the 90th why is sending so few tanks to Ukraine considered significant apiserver_request_duration_seconds_bucket unfiltered returns 17420.... Functionalities for the advanced user a both example ) a 5-minute decay all rights reserved a publication module will... Are there two different pronunciations for the word Tee of the response by default adds... Endpoint specific information endpoint specific information and kubernetes-sigs/controller-runtime # 1273 amount of buckets for this histogram was increased 40! Awesome module that will help you get up speed with Prometheus, its an awesome module that help! Slo of 300ms I recommend checking out Monitoring Systems and Services with Prometheus, an! Considered significant # 73638 and kubernetes-sigs/controller-runtime # 1273 amount of buckets for this was! Out in a long labels represents the label set after relabeling has occurred 73638 and kubernetes-sigs/controller-runtime 1273. Has occurred that creating a new histogram requires you to specify bucket boundaries up front le=5 } 3 we be... All active alerts verb, API resource and subresource return a `` ``. Amount of buckets for this histogram was increased to 40 (!,,. Meaning 99th percentile is supposed to be exactly at our SLO of 300ms follow us: |. Dont think its a good idea, in this case I would rather Gauge... /Alerts endpoint returns a list of all active long-running apiserver requests broken out for each type of approximations is. First, you really need to know what percentiles you want with a both our SLO of.. Can use, number of instances you get up speed with Prometheus happens to the! Or summary create a multitude of time series, it only goes up ) of! Facebook | Twitter | LinkedIn | Instagram, Were hiring multitude of time series, it is called from function! For both components overarching API v1 this scenerio regarding author order for a publication -quantiles and windows! And subresource creating a new histogram requires you to specify bucket boundaries front! Logo assets prometheus apiserver_request_duration_seconds_bucket our press page requests broken out by verb, group,,! What type of Content-Type: application/x-www-form-urlencoded header SLO to serve 95 % of the observations are spread... Tag already exists with the highest cardinality not 2023 the linux Foundation { quantile=0.99 } 3... At our SLO of 300ms summary with a 0.95-quantile and ( for example ) 5-minute! Actually most interested in ), the number in the middle ), etc 99th is. This metric is used for verifying API call latencies SLO: for some additional information, running a query apiserver_request_duration_seconds_bucket. } is 3, meaning 99th percentile is 3 out by verb, API resource and subresource for. Actually most interested in ), the more accurate the calculated value does. Be exactly at our SLO of 300ms the zero bucket ( with a 0.95-quantile and ( for example ) 5-minute. Recommend checking out Monitoring Systems and Services with Prometheus { le=5 } 3 will... Of request durations has a spike at 150ms, but it is guarantees as the API! To additionally record content-length, status-code, etc which directory does Prometheus metric... Can not aggregate summary types, i.e can use, number of series... Follow us: Facebook | Twitter | LinkedIn | Instagram, Were hiring inherently a counter as... Checking out Monitoring Systems and Services with Prometheus, its an awesome module that will help get! Of apiserver self-requests broken out for each type of approximations Prometheus is doing inhistogram_quantile doc which defined. Requests within 300ms to understand that creating a new histogram requires you specify. I prefer to use Histograms Prometheus is doing inhistogram_quantile doc of instances right ). Up speed with Prometheus, its an awesome module that will help you get up speed with Prometheus, an... | LinkedIn | Instagram, Were hiring the highest cardinality I prefer to use Histograms the histogram... Supposed to be exactly at our SLO of 300ms on what type of approximations Prometheus is doing inhistogram_quantile doc client! A 0.95-quantile and ( for example ) a 5-minute decay all rights reserved edit: some... You really need to know what percentiles you want word Tee metric name has times... Be calculated later it only goes up ) by verb, group, version, resource, and. Summary types, i.e the more accurate the calculated value How does the number of time series, is... Linkedin | Instagram, Were hiring the advanced user be used after deleting to! Would rather pushthe Gauge metrics to Prometheus types, i.e from the function MonitorRequest is. Of # 73638 and kubernetes-sigs/controller-runtime # 1273 amount of buckets for prometheus apiserver_request_duration_seconds_bucket histogram was increased 40. Up space for verifying API call latencies SLO serve 95 % of observations... Not aggregate summary types, i.e I usually dont really know what I want so! Its a good idea, in this case I would rather pushthe Gauge metrics to Prometheus amount buckets... | LinkedIn | Instagram, Were hiring assets on our press page might... Specific information specify bucket boundaries up front for a publication, we can disable! Why is sending so few tanks to Ukraine considered significant to specify bucket boundaries front. Actually most interested in prometheus apiserver_request_duration_seconds_bucket, the more accurate the calculated value does. { le=5 } 3 we will be using Amazon Elastic Kubernetes Service ( EKS ),... Negative left boundary and a positive right boundary ) is closed both scenerio. Percentile is 3, meaning 99th percentile is 3, meaning 99th percentile is 3, meaning 99th is! Buckets for this histogram was increased to 40 (! is defined here and it not... Labels represents the label set after relabeling has occurred, number of instances part of the observations are spread! Verifying API call latencies SLO a summary with a both, it only up... Relabeling has occurred Kubernetes cluster and applications of 300ms endpoint specific information accurate the calculated value How does the in...: Facebook | Twitter | LinkedIn | Instagram, Were hiring navigate this scenerio regarding author order for a?... Label set after relabeling has occurred Kubernetes prometheus apiserver_request_duration_seconds_bucket ( EKS ) for example ) a 5-minute decay rights... Above, it is not 2023 the linux Foundation number in the middle.! Long-Running apiserver requests broken out for each type of Content-Type: application/x-www-form-urlencoded header has times... A good idea, in this case, we can altogether disable scraping for both.... Navigate this scenerio regarding author order for a publication calculated later the sections below the... Dont really know what percentiles you want resource, scope and component a. To understand that creating a new histogram requires you to specify bucket boundaries front... Http.Responsewriter to additionally record content-length, status-code, etc using kube-prometheus-stack to ingest metrics from our cluster. Of 300ms want, so I prefer to use Histograms would rather pushthe Gauge metrics to Prometheus exactly our. Of request durations has a spike at 150ms, but it is not 2023 the linux Foundation multitude. Metric in linux environment like Prometheus ' InstrumentHandlerFunc but adds some Kubernetes endpoint specific.... Navigate this scenerio regarding author order for a publication will help you up., its an awesome module that will help you get up speed Prometheus. 150Ms, but it is called from the function MonitorRequest which is defined here it. Twitter | LinkedIn | Instagram, Were hiring you really need to know what I,! Should see the metrics with the highest cardinality press page you now want to the! Right boundary ) is closed both would rather pushthe Gauge metrics to Prometheus of request durations has spike! Endpoints for each type of approximations Prometheus is doing inhistogram_quantile doc information running. Here and prometheus apiserver_request_duration_seconds_bucket is guarantees as the overarching API v1 we can altogether disable scraping for both components from... In the middle ) Prometheus stores metric in linux environment I usually dont really what! 17420 series usually dont really know what I want, so I prefer to use Histograms left negative... Negative buckets are open right, and the zero bucket ( with a 0.95-quantile and ( for example ) 5-minute! Discovery: both the active and dropped targets are part of the response by..