Prometheus's query language supports basic logical and arithmetic operators. vector for each entry in the left-hand side. Swapping out our Syntax Highlighter.How does the highlight.js change affect Stack Overflow specifically?Congratulations to EdChum for 100,000 close reviews!Prometheus - Count increase in metrics for a given metric label.How do I write a Prometheus query that returns the value of a label?Prometheus: extract a substring from a label value?Is high label cardinality but low metric/label count and infrequent sampling an acceptable use-case for Prometheus?Prometheus query to count unique labels over a timeframe,Getting a count of distinct label values in prometheus/grafana.What does 饭圈类 ("rice-ring kind") indicate in 生产这些饭圈类产品?What is better: to have a modal open instantly and then load its contents, or to load its contents and then open it?How can you tell the distances by road between the settlements of Ten-Towns in Icewind Dale?Why Bootstrapping standard errors and 95% confidence intervals change each time I re-conducted the analysis.How does a computer know which device is connected to the usb port?To what extent is music theory just giving us a language to describe/break down music, or does it really have significant "scientific content"?Basic question about real-analytic functions,Work done in assembling a point charge is infinite,Find the result of some assignment statements.Why does exhaust flow inwards through a radial turbocharger?lilypond rests making an empty whole measure,Find limit at 0 of cosine function with embedded sine.Immutable String and Integer in Java: What is the point if assignment in effect changes the value?How to help an infant palm squirrel that is not drinking milk and seems like it's suffocating.Is there a name for a planet and its moons/satellites?How can I allow bidirectional time travel in a deterministic block universe?Asked to share source code from interview task via a public repository.At what pressure will hydrogen start to liquefy at room temperature?Why is power of a signal equal to square of that signal?Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience. this, but we may have different numbers of CPUs on different machines. An open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach. Hello highlight.js! This is Once we get our entire system For,In this case the left vector contains more than one entry per.Prometheus supports the following built-in aggregation operators that can be Prometheus doesn't have the usability facilities to make up for that, i.e. PromQL 表达式计算出来的值有以下几种类型： Prometheus 查询语言 [TOC] Prometheus 查询语言. clear to me now, that's because I've spent much of the last week When clicking on the "explore" link from a panel I already have (which contains a label_replace query), the explore view is correctly opened but the query remove the "$1" character in the args of label_replace function. non-idle CPU modes:(I'm adding some spaces here to make things wrap better here on,Unfortunately this gives us the rate of individual CPUs (expressed you divide by matching elements (ie, the same set of labels). Today I want to tackle one apparently obvious thing, which is getting a graph (or numbers) of CPU utilization. can work if you get the magic right but you probably want to go at it Should dissappear on query runs.Just to understand this, does this mean that any label query performance will correlate to number of metrics? Query to show label values in Grafana (using prometheus) 0. adding static time interval panel in Grafana Prometheus. the PromQL way and match the labels the way we have. stuff by the next time I have to touch something here. Hopefully they could be joined with different names.I wonder if some scenes that we need add some labels to the metrics of the third-exporter.For example, the node_exporter,if I want to add one or more labels to the metrics.What should I do?I would love the requested feature as well.I would also like to see this (being able to do.I would like to be able to join metrics from node-exporter with node metrics from kube_state_metrics.node-exporter only provides the node name, which in EC2 is something like,These two metrics align on that node name, where node-exporter metrics have a.It was merged on Jun 16, 2017, so after this ticket was created, and resolves this ticket.True, that'd also cover it (though not quite what that function is for). In the below usecase I probe for machine.example.com instead of www.example.com to bypass DNS geo load balancing. I feel like language providers are doing too much work already.Metrics used to be highlighted, but not anymore, so we can remove it. vector of fewer elements with aggregated values:These operators can either be used to aggregate over,If we are just interested in the total of HTTP requests we have seen in.To count the number of binaries running each build version we could write:To get the 5 largest HTTP requests counts across all instances we could write:The following list shows the precedence of binary operators in Prometheus, from It makes the query impossible to copy/paste to the prometheus … Our starting point is the rate over Kubernetes is also fixing their metrics, but is awaiting their depreciation cycle. ),How Prometheus's query steps (aka query resolution) work,Garbage collection and the underappreciated power of good enough. Effectively, it only scrapes the pods that labeled with “app=hpa-sim”. Kind of like.For example if my metric 'hello_info' has labels a and b. I want to count number of unique a's. This means Prometheus will ignore all the pods that don’t regex match to “hpa-sim” for the label of “app”. set up, it's quite likely that I'll not deal with Prometheus for 0. multiple values from grafana variable in prometheus query. (Non-working) prototype for doing joins on unequal labels. The.I'd like to check if use this return argument anywhere and adapt the interface. Hello highlight.js! @@ -13,6 +13,7 @@ const DEFAULT_KEYS = ['job', 'instance'];when a prometheus datasource has more than 10000 metrics, label lookup,installations of that size have slow typehead lookup times and make. It's exacerbated by us using the series API, which will return.Seems that this problem reappeared in v6.6.2 even if the timeout is received at 10000 metrics , the lookup times and make the editor sluggish....We are currently investigating this issue and working on a fix, see e.g. For a list of trademarks of The Linux Foundation, please see our,Use file-based service discovery to discover scrape targets,Monitoring Linux host metrics with the Node Exporter,Monitoring Docker container metrics using cAdvisor,Understanding and using the multi-target exporter pattern,Many-to-one and one-to-many vector matches. of 500 for each method, as measured over the last 5 minutes. What does this mean for the future of AI, edge…,Hot Meta Posts: Allow for removal by moderators, and thoughts about future…,Goodbye, Prettify. the left we have labels and values like this:And on the right we have a matching set of labels, as we saw, that gives By using our site, you acknowledge that you have read and understand our.Stack Overflow for Teams is a private, secure spot for you and
PromQL（Prometheus Query Language）是 Prometheus 自己开发的表达式语言，语言表现力很丰富，内置函数也很多。使用它可以对时序数据进行筛选和聚合。 1. If Key/value filters that are automatically added to all metric queries for a data source (InfluxDB, Prometheus, and Elasticsearch only). Do we break the commutivity we currently have? user mode for all of the time, the summed rate of user mode is matching behavior: One-to-one and many-to-one/one-to-many.This returns a result vector containing the fraction of HTTP requests with status code Grafana variable and Prometheus query. Adding the domain to the certificate will make the domain known to everyone who checks the certificate so not a solution. How does this interact with group_left?Label matching is already confusing to users, so I'm wary of adding more modifiers.The only place I've ever seen anything like this is for alertmanager inhibits, for when you want to use an alert another team has setup for this purpose but you called your zone/cluster/datacenter label something else.Yes, I'm trying to think about standardisation of k8s metrics but see exactly those differing requirements of metric stability.As it would be an addition, I don't think we'd break anyone. [kubernetes_name, __name__, owner_kind, owner_name],# fall back to app label for static/orphaned pods,* on(namespace, pod) group_left(host_ip, node, pod_ip),* on(namespace, pod) group_left (owner_is_controller, owner, owner_kind, owner_name).kube_pod_owner{owner_is_controller="
"},kube_pod_owner{owner_is_controller="true"},sum by (namespace, pod_name)(container_memory_usage_bytes),sum by (namespace, pod_name)(container_spec_memory_limit_bytes),sum by (namespace, pod_name)(kube_pod_container_resource_requests_memory_bytes).You signed in with another tab or window. k8 is a more complicated system though.This does sound like something sig-instrumentation should be standardising.Would this addition have any weird edge-case semantics or be confusing?I've only been thinking on it a few minutes, but I see potential issues around e.g.Which of the two labels does the output metric have? A given data point of Chained variables: Variable queries can contain other variables. But I consider it a real-world concern. We recently merged #12597 which will be released in Grafana v5.3. Without,The label list provided with the group modifier contains additional labels from A certain amount of Prometheus's query language is reasonably obvious, but once you start getting into the details and the clever tricks you wind up needing to wrap your mind around how PromQL wants you to think about its world. The label_values function is something specific for Grafana (not prometheus) and we have no plans at the moment to extend that to support full queries. here:If you could add your own data in that issue, we would really appreciate it.Successfully merging this pull request may close these issues.Prometheus: disable dynamic label lookup on big datasources,`Dynamic label lookup is disabled for datasources with more than,// number of metrics defining an installation that's too big.Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.You signed in with another tab or window.public/app/plugins/datasource/prometheus/components/PromQueryField.tsx,public/app/plugins/datasource/prometheus/language_provider.ts,Raise dynamic lookup threshold to 10000 metrics,Prometheus: disable dynamic label lookup on big datasources (. used to aggregate the elements of a single instant vector, resulting in a new Their behavior can be 1. Naively I would assume that even if there are many metrics, if each metric has low cardinality, then query for the metrics labels will be quick.It's certainly a heuristic, assuming that a lot of metrics will mean a lot of timeseries, which ultimately will have slow response times in dynamic lookups. observe that the numbers add up to more than 1 second. So it all works out.In general, when you're doing this sort of cross-metric operation you This would only affect.We might want to add that and see over a few weeks how far standardisation efforts get us.On 18 November 2016 at 12:57, Fabian Reinartz,However, in the end if I want to drill down I'd have to use that ad-hoc,As a side note: I think we should really improve on the auto completion in,And if proper auto completion would solve the issue discussed here, I'd,SoundCloud Ltd. | Rheinsberger Str. Would it be possible to add an option to ignore the certificate alltogether? The Linux Foundation has registered trademarks and uses trademarks. 2. We could hardcode Prometheus query to count unique label values. By default they filter. and vector/vector value pairs.The following binary comparison operators exist in Prometheus:Comparison operators are defined between scalar/scalar, vector/scalar, and hence relying more strongly on application's documentation of its metrics. However, in the end if I want to drill down I'd have to use that ad-hoc again and again.I know it's not an ideal state of the world thing to have different label names. cAdvisor exports container metrics labeled with pod name. For example,© Prometheus Authors 2014-2020 | Documentation Distributed under CC-BY-4.0,© 2020 The Linux Foundation. Does the Pyromancer sorcerer's Fiery Soul feature work with the Elemental Adept feat (fire damage) to effectively ignore immunity as well? 4. The metric and label conventions presented in this document are not required for using Prometheus, but can serve as both a style-guide and a collection of best practices. On But I consider it a real-world concern. The inner label_replace copies all values from group into new_group, the outer overwrites those which match "misc group.+" with "misc", and we then sum by the "new_group" label. need to make it so that the labels come out the same on each side. mode usage stats as a running counter of seconds in that mode (which – but it's just an unrealistic expectation to align 3+ components written by different teams. Refer to Global variables. your coworkers to find and share information.I want to count number of unique label values. Individual organizations may want to approach some of these practices, e.g. By using our site, you acknowledge that you have read and understand our.Stack Overflow for Teams is a private, secure spot for you and
Would this addition have any weird edge-case semantics or be confusing?In the systems I'm used to, the equivalent pod data and instance data would almost never be joined - it wasn't needed in practice to actually link things together end to end to do the alerting you wanted. Swapping out our Syntax Highlighter.How does the highlight.js change affect Stack Overflow specifically?Congratulations to EdChum for 100,000 close reviews!How is it possible to know the total number of unique metrics in Prometheus,Concatenate MIB variable label to another query result from other two MIB variables in Prometheus,Prometheus - same metric with different labels is overridden before scraping,Using metric in right hand side of prometheus query,Cleaning metrics in Prometheus after recording rules computation,Prometheus - query for the latest available metrics, irregardless of how old it is,Managing prometheus limitation of pushgateway's recent scrape time,Prometheus Collector fails with “collected metric was collected before with the same name and label values”,lilypond rests making an empty whole measure,Why Bootstrapping standard errors and 95% confidence intervals change each time I re-conducted the analysis.Can an Umbrella deflect a Great Wyrm Red Dragon’s Breath?Could 1970's police cars be usable in the modern era?How can I draw two rolling circles with TikZ?Sudden stop of wet food diet is causing my cat to vomit.Can airliners land with auto pilot at strong gusty wind?How to calculate the odds of finding "20" at least three times in a sha256 string?Macro for drawing stacks of colored horizontal rectangles.Why is power of a signal equal to square of that signal?If a research project leads to potential financial benefits, who owns such benefits?After bootstrapping regression analysis, all p-values are multiple of 0.001996.What causes a fuse to blow, the current or the power?Why did it take so long for the Germans to develop the first tank model in World War I?How can I get material property data past what's provided via ElementData[], ChemicalData[], etc. you try too hard to turn your CPU count into a pure number, well, it In order to turn this into a percentage, This document is meant as a reference. Add ad hoc filters. your coworkers to find and share information.If I have a metric with the following labels:(I realize that the metric cardinality needs to be improved, and I've updated the app to fix it. Prometheus query to count unique labels over a timeframe. Fixing the labels before they get to vector matching is a better option than making vector matching even more complicated in any case.Successfully merging a pull request may close this issue. I imagine a syntax along the lines of:I know that's not a trivial extension to PromQL, so this is just to start a discussion.The correct answer here is to fix the exporter, I consider label_replace and what you propose here only as stop-gaps until that can happen.I figured that would be the go-to response.I agree with that when it comes to labels containing concatenated information we have to split before joining etc. For learning, it might be easier tostart with a couple of examples. There are two basic types of ... Return all time series with the metric http_requests_total and the given job and handler labels: http_requests_total{job="apiserver", ... All regular expressions in Prometheus use RE2 syntax. however many CPUs we have. All rights reserved. Prometheus query for table in grafana. months at a time and thus will have forgotten all of this 'obvious' GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.By clicking “Sign up for GitHub”, you agree to our.language provider's start function no longer returned any list of additional tasks. Kubelet exports pod info metrics (at least I think that's the best source, issue pending on that), kube-state-metrics exporting metrics on abstract objects like deployments, replica sets, etc.These would mostly be recording rules, yes – they'd be fairly static and label_replace would be okay. What does this mean for the future of AI, edge…,Hot Meta Posts: Allow for removal by moderators, and thoughts about future…,Goodbye, Prettify. this looks like:Suppose that we want to know how our machine's entire CPU state PromQL 语法 1.1 数据类型. The curl equivalent would be The reason for using a new label is the series would no longer be unique if we just overwrote the "group" label… Querying examples | Prometheus Toggle navigation Prometheus Global variables: Built-in variables that can be used in expressions in the query editor. because we're summing over multiple CPUs; if each of them is in proper query-time completion on potential labels per metric and their values, ... Also, metric relabeling is not exactly cheap. Getting a count of distinct label values in prometheus/grafana. Effectively, it only scrapes the pods that labeled with “app=hpa-sim”. Simple time series selection Subquery Using functions, operators, etc.
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