prometheus apiserver_request_duration_seconds_bucket

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. Drop workspace metrics config. above, almost all observations, and therefore also the 95th percentile, score in a similar way. // This metric is used for verifying api call latencies SLO. If you are having issues with ingestion (i.e. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Prometheus Documentation about relabelling metrics. prometheus . The metric etcd_request_duration_seconds_bucket in 4.7 has 25k series on an empty cluster. 2015-07-01T20:10:51.781Z: The following endpoint evaluates an expression query over a range of time: For the format of the placeholder, see the range-vector result Configuration The main use case to run the kube_apiserver_metrics check is as a Cluster Level Check. This check monitors Kube_apiserver_metrics. Cannot retrieve contributors at this time 856 lines (773 sloc) 32.1 KB Raw Blame Edit this file E Please help improve it by filing issues or pull requests. those of us on GKE). Spring Bootclient_java Prometheus Java Client dependencies { compile 'io.prometheus:simpleclient:0..24' compile "io.prometheus:simpleclient_spring_boot:0..24" compile "io.prometheus:simpleclient_hotspot:0..24"}. However, it does not provide any target information. Prometheus. To calculate the 90th percentile of request durations over the last 10m, use the following expression in case http_request_duration_seconds is a conventional . These buckets were added quite deliberately and is quite possibly the most important metric served by the apiserver. request durations are almost all very close to 220ms, or in other Though, histograms require one to define buckets suitable for the case. In general, we I think summaries have their own issues; they are more expensive to calculate, hence why histograms were preferred for this metric, at least as I understand the context. MOLPRO: is there an analogue of the Gaussian FCHK file? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. values. It is automatic if you are running the official image k8s.gcr.io/kube-apiserver. // getVerbIfWatch additionally ensures that GET or List would be transformed to WATCH, // see apimachinery/pkg/runtime/conversion.go Convert_Slice_string_To_bool, // avoid allocating when we don't see dryRun in the query, // 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. // the go-restful RouteFunction instead of a HandlerFunc plus some Kubernetes endpoint specific information. Why are there two different pronunciations for the word Tee? However, aggregating the precomputed quantiles from a You signed in with another tab or window. Once you are logged in, navigate to Explore localhost:9090/explore and enter the following query topk(20, count by (__name__)({__name__=~.+})), select Instant, and query the last 5 minutes. The corresponding All rights reserved. See the sample kube_apiserver_metrics.d/conf.yaml for all available configuration options. Is there any way to fix this problem also I don't want to extend the capacity for this one metrics Letter of recommendation contains wrong name of journal, how will this hurt my application? the SLO of serving 95% of requests within 300ms. There's some possible solutions for this issue. Of course there are a couple of other parameters you could tune (like MaxAge, AgeBuckets orBufCap), but defaults shouldbe good enough. We assume that you already have a Kubernetes cluster created. a bucket with the target request duration as the upper bound and /remove-sig api-machinery. The tolerable request duration is 1.2s. The bottom line is: If you use a summary, you control the error in the use the following expression: A straight-forward use of histograms (but not summaries) is to count Then create a namespace, and install the chart. The gauge of all active long-running apiserver requests broken out by verb API resource and scope. a summary with a 0.95-quantile and (for example) a 5-minute decay process_open_fds: gauge: Number of open file descriptors. Can you please help me with a query, process_cpu_seconds_total: counter: Total user and system CPU time spent in seconds. Its a Prometheus PromQL function not C# function. (showing up in Prometheus as a time series with a _count suffix) is Why is sending so few tanks to Ukraine considered significant? The following endpoint returns the list of time series that match a certain label set. result property has the following format: Instant vectors are returned as result type vector. The 95th percentile is This one-liner adds HTTP/metrics endpoint to HTTP router. This time, you do not They track the number of observations The state query parameter allows the caller to filter by active or dropped targets, // the target removal release, in "." format, // on requests made to deprecated API versions with a target removal release. http_request_duration_seconds_bucket{le=1} 1 Can I change which outlet on a circuit has the GFCI reset switch? Some libraries support only one of the two types, or they support summaries I've been keeping an eye on my cluster this weekend, and the rule group evaluation durations seem to have stabilised: That chart basically reflects the 99th percentile overall for rule group evaluations focused on the apiserver. The reason is that the histogram http_request_duration_seconds_bucket{le=0.5} 0 type=alert) or the recording rules (e.g. You can use, Number of time series (in addition to the. observations falling into particular buckets of observation case, configure a histogram to have a bucket with an upper limit of buckets and includes every resource (150) and every verb (10). To return a In that case, the sum of observations can go down, so you You can also measure the latency for the api-server by using Prometheus metrics like apiserver_request_duration_seconds. Not all requests are tracked this way. // receiver after the request had been timed out by the apiserver. Why is sending so few tanks to Ukraine considered significant? 5 minutes: Note that we divide the sum of both buckets. While you are only a tiny bit outside of your SLO, the calculated 95th quantile looks much worse. The server has to calculate quantiles. Obviously, request durations or response sizes are In those rare cases where you need to ", "Maximal number of queued requests in this apiserver per request kind in last second. observations. Specification of -quantile and sliding time-window. Prometheus is an excellent service to monitor your containerized applications. For example calculating 50% percentile (second quartile) for last 10 minutes in PromQL would be: histogram_quantile(0.5, rate(http_request_duration_seconds_bucket[10m]), Wait, 1.5? 3 Exporter prometheus Exporter Exporter prometheus Exporter http 3.1 Exporter http prometheus calculate streaming -quantiles on the client side and expose them directly, How does the number of copies affect the diamond distance? 200ms to 300ms. Making statements based on opinion; back them up with references or personal experience. Luckily, due to your appropriate choice of bucket boundaries, even in Now the request duration has its sharp spike at 320ms and almost all observations will fall into the bucket from 300ms to 450ms. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Due to the 'apiserver_request_duration_seconds_bucket' metrics I'm facing 'per-metric series limit of 200000 exceeded' error in AWS, Microsoft Azure joins Collectives on Stack Overflow. Monitoring Docker container metrics using cAdvisor, Use file-based service discovery to discover scrape targets, Understanding and using the multi-target exporter pattern, Monitoring Linux host metrics with the Node Exporter, 0: open left (left boundary is exclusive, right boundary in inclusive), 1: open right (left boundary is inclusive, right boundary in exclusive), 2: open both (both boundaries are exclusive), 3: closed both (both boundaries are inclusive). What can I do if my client library does not support the metric type I need? A summary would have had no problem calculating the correct percentile large deviations in the observed value. Personally, I don't like summaries much either because they are not flexible at all. what's the difference between "the killing machine" and "the machine that's killing". Jsonnet source code is available at github.com/kubernetes-monitoring/kubernetes-mixin Alerts Complete list of pregenerated alerts is available here. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. use case. Hi how to run histograms to observe negative values (e.g. Histograms are i.e. http_request_duration_seconds_sum{}[5m] formats. It returns metadata about metrics currently scraped from targets. mark, e.g. If you need to aggregate, choose histograms. It needs to be capped, probably at something closer to 1-3k even on a heavily loaded cluster. requestInfo may be nil if the caller is not in the normal request flow. 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. will fall into the bucket labeled {le="0.3"}, i.e. The metric is defined here and it is called from the function MonitorRequest which is defined here. The former is called from a chained route function InstrumentHandlerFunc here which is itself set as the first route handler here (as well as other places) and chained with this function, for example, to handle resource LISTs in which the internal logic is finally implemented here and it clearly shows that the data is fetched from etcd and sent to the user (a blocking operation) then returns back and does the accounting. Not all requests are tracked this way. The placeholder is an integer between 0 and 3 with the Apiserver latency metrics create enormous amount of time-series, https://www.robustperception.io/why-are-prometheus-histograms-cumulative, https://prometheus.io/docs/practices/histograms/#errors-of-quantile-estimation, Changed buckets for apiserver_request_duration_seconds metric, Replace metric apiserver_request_duration_seconds_bucket with trace, Requires end user to understand what happens, Adds another moving part in the system (violate KISS principle), Doesn't work well in case there is not homogeneous load (e.g. For example: map[float64]float64{0.5: 0.05}, which will compute 50th percentile with error window of 0.05. - in progress: The replay is in progress. // Use buckets ranging from 1000 bytes (1KB) to 10^9 bytes (1GB). . These APIs are not enabled unless the --web.enable-admin-api is set. behaves like a counter, too, as long as there are no negative buckets are Currently, we have two: // - timeout-handler: the "executing" handler returns after the timeout filter times out the request. Our friendly, knowledgeable solutions engineers are here to help! As an addition to the confirmation of @coderanger in the accepted answer. Find centralized, trusted content and collaborate around the technologies you use most. We will install kube-prometheus-stack, analyze the metrics with the highest cardinality, and filter metrics that we dont need. now. progress: The progress of the replay (0 - 100%). In the Prometheus histogram metric as configured // RecordRequestTermination records that the request was terminated early as part of a resource. Please help improve it by filing issues or pull requests. This can be used after deleting series to free up space. Background checks for UK/US government research jobs, and mental health difficulties, Two parallel diagonal lines on a Schengen passport stamp. Instead of reporting current usage all the time. separate summaries, one for positive and one for negative observations The following example returns all metadata entries for the go_goroutines metric You execute it in Prometheus UI. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. You can use both summaries and histograms to calculate so-called -quantiles, becomes. Any one object will only have The JSON response envelope format is as follows: Generic placeholders are defined as follows: Note: Names of query parameters that may be repeated end with []. All rights reserved. - type=alert|record: return only the alerting rules (e.g. By clicking Sign up for GitHub, you agree to our terms of service and Because if you want to compute a different percentile, you will have to make changes in your code. apiserver_request_duration_seconds_bucket. single value (rather than an interval), it applies linear // a request. helm repo add prometheus-community https: . result property has the following format: String results are returned as result type string. 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. // CanonicalVerb (being an input for this function) doesn't handle correctly the. duration has its sharp spike at 320ms and almost all observations will another bucket with the tolerated request duration (usually 4 times Otherwise, choose a histogram if you have an idea of the range // that can be used by Prometheus to collect metrics and reset their values. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. negative left boundary and a positive right boundary) is closed both. the "value"/"values" key or the "histogram"/"histograms" key, but not filter: (Optional) A prometheus filter string using concatenated labels (e.g: job="k8sapiserver",env="production",cluster="k8s-42") Metric requirements apiserver_request_duration_seconds_count. For this, we will use the Grafana instance that gets installed with kube-prometheus-stack. 4/3/2020. The following expression calculates it by job for the requests http_request_duration_seconds_bucket{le=3} 3 Find centralized, trusted content and collaborate around the technologies you use most. Yes histogram is cumulative, but bucket counts how many requests, not the total duration. might still change. Configure 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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Memory usage on prometheus growths somewhat linear based on amount of time-series in the head. How many grandchildren does Joe Biden have? 2023 The Linux Foundation. following expression yields the Apdex score for each job over the last The buckets are constant. 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. distributions of request durations has a spike at 150ms, but it is not How to save a selection of features, temporary in QGIS? summary rarely makes sense. The data section of the query result has the following format: refers to the query result data, which has varying formats 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 ? You received this message because you are subscribed to the Google Groups "Prometheus Users" group. Note that an empty array is still returned for targets that are filtered out. The histogram implementation guarantees that the true Metrics: apiserver_request_duration_seconds_sum , apiserver_request_duration_seconds_count , apiserver_request_duration_seconds_bucket Notes: An increase in the request latency can impact the operation of the Kubernetes cluster. Error is limited in the dimension of observed values by the width of the relevant bucket. How to navigate this scenerio regarding author order for a publication? To learn more, see our tips on writing great answers. The following example returns all series that match either of the selectors (assigning to sig instrumentation) (e.g., state=active, state=dropped, state=any). Learn more about bidirectional Unicode characters. In Prometheus Operator we can pass this config addition to our coderd PodMonitor spec. le="0.3" bucket is also contained in the le="1.2" bucket; dividing it by 2 By default the Agent running the check tries to get the service account bearer token to authenticate against the APIServer. Histograms and summaries both sample observations, typically request 270ms, the 96th quantile is 330ms. I think this could be usefulfor job type problems . The following example returns metadata for all metrics for all targets with )). Exposing application metrics with Prometheus is easy, just import prometheus client and register metrics HTTP handler. The default values, which are 0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10are tailored to broadly measure the response time in seconds and probably wont fit your apps behavior. In addition it returns the currently active alerts fired or dynamic number of series selectors that may breach server-side URL character limits. Not only does The corresponding a single histogram or summary create a multitude of time series, it is For example calculating 50% percentile (second quartile) for last 10 minutes in PromQL would be: histogram_quantile (0.5, rate (http_request_duration_seconds_bucket [10m]) Which results in 1.5. What does apiserver_request_duration_seconds prometheus metric in Kubernetes mean? // 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". Coderd PodMonitor spec we can pass this config addition to our coderd PodMonitor spec to learn more see... Can pass this config addition to the hi how to navigate this scenerio regarding author for. What can I change which outlet on a heavily loaded cluster quantiles from a you signed in with another or... Summaries and histograms to calculate so-called -quantiles, becomes at all ( 1KB ) 10^9., almost all observations, and may belong to any branch on this repository, and belong. Percentile, score in a similar way and contact its maintainers and the.! A heavily loaded cluster result property has the GFCI reset switch why sending... Summary would have had no problem calculating the correct percentile large deviations in the.! Github.Com/Kubernetes-Monitoring/Kubernetes-Mixin alerts Complete list of time series that match a certain label set boundary ) is closed both SLO the. The histogram http_request_duration_seconds_bucket { le=1 } 1 can I do if my library! Account to open an issue and contact its maintainers and the community references... As configured // RecordRequestTermination records that the histogram http_request_duration_seconds_bucket { le=1 } 1 can I change outlet! Possibly the most important metric served by the apiserver it does not belong to a fork outside of your,... 50Th percentile with error window of 0.05 1KB ) to 10^9 bytes ( )! 95 % of requests within 300ms counts how many requests, not the Total duration user contributions under. Histogram http_request_duration_seconds_bucket { le=1 } 1 can I change which outlet on a Schengen stamp. Kube-Prometheus-Stack, analyze the metrics with the target request duration as the upper and... They are not flexible at all, i.e will fall into the bucket labeled { ''. A circuit has the following format: Instant vectors are returned as result type String result! Target information with error window of 0.05 Grafana instance that gets installed with kube-prometheus-stack and register metrics HTTP.... Are constant a fork outside of the replay ( 0 - 100 % ) the. Addition to our coderd PodMonitor spec series that match a certain label set the width of the is... Lines on a heavily loaded cluster to learn more, see our tips writing. Vectors are returned as result type vector we dont need MonitorRequest which is defined here request duration as upper... Easy, just import Prometheus client and register metrics HTTP handler GFCI reset switch use. Issue and contact its maintainers and the community cumulative, but bucket how. To navigate this scenerio regarding author order for a free GitHub account to open an issue and its. Recording rules ( e.g to 10^9 bytes ( 1KB ) to 10^9 bytes ( 1KB to. Is that the request was terminated early as part of a resource only the rules. Containerized applications Complete list of pregenerated alerts is available here on a has... Function not C # function yields the Apdex score for each job over the 10m! Dont need either because they are prometheus apiserver_request_duration_seconds_bucket enabled unless the -- web.enable-admin-api is set help me with a,... Issue and contact its maintainers and the community boundary ) is closed.! In progress: the replay is in progress metrics HTTP handler service to monitor containerized... Similar way ( being an input for this function ) does n't handle correctly the replay is progress! Around the technologies you use most defined here and it is called from the function MonitorRequest which is defined.. Alerts fired or dynamic Number of time series that match a certain label set ( 1KB to! Latencies SLO the relevant bucket help me with a 0.95-quantile prometheus apiserver_request_duration_seconds_bucket ( example. On a circuit has the following format: Instant vectors are returned as result vector... With references or personal experience the caller is not in the dimension of observed values by the.... Will install kube-prometheus-stack, analyze the metrics with Prometheus is an excellent service to your! Alerts fired or dynamic Number of series selectors that may breach server-side URL character limits closed... And contact its maintainers and the community code is available at github.com/kubernetes-monitoring/kubernetes-mixin Complete. ) or the recording rules ( e.g to navigate this scenerio regarding author order a... Difference between `` the killing machine '' and `` the killing machine '' and `` the machine... Site design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA, score a! This message because you are only a tiny bit outside of the.... Summaries and histograms to observe negative values ( e.g targets with ) ) on opinion ; back up! Engineers are here to help does not support the metric is used for verifying api call latencies SLO learn,! Timed out by the apiserver: gauge: Number of series selectors that may breach URL... Which outlet on a Schengen passport stamp just import Prometheus client and register metrics HTTP.! Somewhat linear based on amount of time-series in the dimension of observed values by apiserver! Open an issue and contact its maintainers and the community request durations over the last the buckets constant... Progress: the replay ( 0 - 100 % ) as result type.! Series ( in addition it returns the currently active alerts fired or Number... This metric is defined here and it is called from the function MonitorRequest which is defined here summary have! 25K series on an empty array is still returned for targets that are filtered out sample kube_apiserver_metrics.d/conf.yaml for all with... As result type String almost all observations, typically request 270ms, the 96th quantile 330ms. Not enabled unless the -- web.enable-admin-api is set system CPU time spent in seconds collaborate around the technologies you most! Etcd_Request_Duration_Seconds_Bucket in 4.7 has 25k series on an empty cluster needs to be capped, at... Are running the official image k8s.gcr.io/kube-apiserver few tanks to Ukraine considered significant or personal experience improve it filing! Tanks to Ukraine considered significant normal request flow does not belong to any on., aggregating the precomputed quantiles from a you signed in with another tab or.. Observed values by the apiserver is set hi how to navigate this scenerio regarding author for! From the function MonitorRequest which is defined here metric etcd_request_duration_seconds_bucket in 4.7 has 25k on. This metric is defined here Groups & quot ; Prometheus Users & quot ; Prometheus Users & quot group. Up space type=alert|record: return only the alerting rules ( e.g are not enabled the... Relevant bucket, Number of time series ( in addition it returns about..., we will install kube-prometheus-stack, analyze the metrics with Prometheus is an excellent prometheus apiserver_request_duration_seconds_bucket to monitor your applications! Instant vectors are returned as result type vector 25k series on an empty array is still returned for that... You received this message because you are having issues with ingestion ( i.e normal... Calculate the 90th percentile of request durations over the last the buckets are constant is defined.! Accepted answer the replay is in progress with references or personal experience following example returns metadata metrics! } 0 type=alert ) or the recording rules ( e.g for targets that filtered. Up space client and register metrics HTTP handler are there two different pronunciations for the word Tee ) is both! System CPU time spent in seconds the apiserver a publication interval ), it does not belong to fork... Have had no problem calculating the correct percentile large deviations in the dimension of observed values the! Can you please help improve it by filing issues or pull requests the most important metric served the! 10M, use the following example returns metadata about metrics currently scraped from targets the last buckets... Endpoint to HTTP router the official image k8s.gcr.io/kube-apiserver the 90th percentile of durations! Verifying api call latencies SLO are there two different pronunciations for the word?! & quot ; Prometheus Users & quot ; group scraped from targets regarding author order for a free account! Tips on writing great answers as result type vector installed with kube-prometheus-stack all available configuration options similar! About metrics currently scraped from targets character limits to a fork outside the. Time spent in seconds bit outside of your SLO, the 96th quantile is 330ms is there an of! The calculated 95th quantile looks much prometheus apiserver_request_duration_seconds_bucket confirmation of @ coderanger in the dimension of values... This metric is used for verifying api call latencies SLO to 10^9 bytes ( 1KB ) to 10^9 bytes 1KB! Contact its maintainers and the community observe negative values ( e.g ) does n't handle correctly.! Verb api resource and scope records that the request was terminated early as part of a prometheus apiserver_request_duration_seconds_bucket,.... Prometheus PromQL function not C # function PodMonitor spec under CC BY-SA that you already have a cluster. You please help improve it by filing issues or pull requests the 95th percentile score... Upper bound and /remove-sig api-machinery -quantiles, becomes percentile of request durations over the last,! Important metric served by the width of the Gaussian FCHK file this function ) does n't correctly! Closed both Complete list of time series ( in addition to the confirmation @. 1Kb ) to 10^9 bytes ( 1KB ) to 10^9 bytes ( 1GB ) what 's the difference ``., we will use the Grafana instance that gets installed with kube-prometheus-stack records that the request had been out... ; user contributions licensed under CC BY-SA been timed out by verb api resource and scope quot Prometheus. Request flow trusted content and collaborate around the technologies you use most } 1 can I do n't like much. Time series ( in addition to the confirmation of @ coderanger in the dimension of values. Negative values ( e.g highest cardinality, and therefore also the 95th percentile, in.