Golang prometheus counter with label
Golang prometheus counter with label. Based on this query I construct a new metric, with a different name, and then I "copy" the values of the query into the new metric with newMetric. ymlfile to add the Prometheus service. Prometheus documentation: May 25, 2018 · x=Gauge(metric_name, metric_description, label_names) x. Feb 5, 2021 · February 5, 2021 · Tom Gregory. gin_request_duration: Histogram: the time server took to handle the request. The counter is increased every time our endpoint is hit. Apr 10, 2023 · This step-by-step guide explains how to install and configure Prometheus and Grafana, add Prometheus as a data source, create a dashboard, and use them to monitor a Go application. 0 to expose the metrics endpoint. grpc_method - the name of the method called on the Feb 25, 2019 · 保证Go语言安装环境(1. Share Jun 2, 2016 · The ability to use the "leaves" in the tree directly (they also implement Collector) is the client_golang way to provide said convenience. This is the classic pitfall that everyone hits at least once when they're starting out with Prometheus. If you are unsure, start with no labels and add more labels over time as concrete use cases arise. The Prometheus client libraries offer four core metric types. // A Counter is typically used to count requests served, tasks completed, errors. Golang prometheus client version is 1. Feb 5, 2020 · Here, I have kube state metrics info in prometheus for kube_pod_info & kube_pod_labels. Relabeling is a powerful tool that allows you to classify and filter Prometheus targets and metrics by rewriting their label set. This library allows you to instrument your code with custom metrics and provides some built-in metric collection integrations for ASP. Package prometheus is the core instrumentation package. go I used the following link as a guide. Not have any firewall/LB/proxy that filters away requests with unknown method. Each time series is uniquely identified by its metric name and optional key-value pairs called labels. Share Follow Counter. If you cannot upgrade to v1. The Prometheus server does not yet make use of the type information and flattens all data into Feb 22, 2018 · You probably want to implement a collector instead, and run the http request when the Prometheus server scrapes. Best practices and usage. Only then would you be looping over real time series data, and then your labels won't be static over a loop, like they are now. Drop# In order to drop the above-mentioned metrics, we need to add metric_relabel_configs in Prometheus scrape config with the metric name we need to drop : Jul 28, 2022 · Say my counter has had gone from 1000 to 1600 in one hour, I expect the above to returns 600, but get ~5. prometheus. ) While those cases exist, it's also rarely necessary to track the used label names. Execute a custom query against Prometheus with some custom query logic (sum without, label replace) 2. Sep 16, 2019 · I am using counters to count the number of requests. Labels. histogram_avg(v instant-vector) returns the arithmetic average of observed values stored in a native histogram. By using offset, the value is always integer because it just calculates the difference between start and end. Querying Prometheus. Metric and label naming. Jan 17, 2019 · Prometheus allows renaming labels in the following places: During metric scrape. Jun 24, 2021 · The monitor had to do one thing:Send an HTTP request to the website, time the response and send it to Prometheus. Replace http with your custom multiplexer. The project is a member of the Cloud Native Computing Foundation, joining in 2016 as the second hosted project, after Kubernetes. If you have say, 10 000 devices and 100 messagetypes, you'll end up with a million series. 19. Then to prevent the main() function from exiting, we can use a select statement that blocks until our goroutines are running. // This is a complete program that exports two metrics, a Gauge and a Counter, // the latter with a label attached to turn it into a (one-dimensional) vector. You can use a function like this to initialise and return GaugeVec just once and then use it to assign dynamic label values to it. They are also in Kubernetes core components like the API server, CoreDNS, and others. I think then the preferred approach would be to make a Gauge Vector. increase will extrapolate the range so that we can see float number in the result. Use WithLabelValues to get a Gauge object and call Set on it to set the value Aug 29, 2017 · It's raised internally by the Prometheus client_golang code to mark generally doing something bad (because labels for a metric shouldn't change between scrapes). gauge, summary vs. needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. Follow these steps to export data from OTel to Prometheus. DefaultRegisterer and DefaultGatherer are the implementations of the Registerer and Gatherer interface a number of convenience functions in this package act on. To pick between counter and gauge, there is a simple rule of thumb: if the value can go down, it is a gauge. VictoriaMetrics provides prometheus_buckets function, which converts vmrange buckets to Prometheus-style buckets with le labels. Could you try grepping -DCPU_FREQ from kepler log to confirm this assumption? Package prometheus is the core instrumentation package. 2 - The idea is to create another client to expose metrics for Prometheus, so we will interface with two implementations (datadog and prometheus) and save in both places at this first time, but as you said above the prometheus lib enforces to use always the same number of labels. 3. Individual organizations may want to approach some of these practices, e. Write an exporter in GO. NewProcessCollector(collectors. "net/http". Assume we are going to create a metric my_metric that has custom timestamp, using a collector called myCollector: package main. I have a label called "label_source=“k8s" in kube_pod_labels. It is important to know which of the four main metric types to use for a given metric. clear() Jan 9, 2024 · This may be useful, but I was interested in digging into the prometheus source code and I noticed the following. package main. Is there any way to get current value of a prometheus counter? My aim is to reuse existing counter without allocating another variable. SampleValue) for _, val := range result. What you are aiming for is the slice of sample pairs. Handle("/metrics", promhttp. var MemoryValue = prometheus. I am also using fiber golang v2. Apr 13, 2021 · From Prometheus side, metrics can be distinguished by their label and saved separately, although the more you get the worse scrape performance you will have if that matters for you. Base units. Jul 22, 2019 · 6. Mar 18, 2021 · Prometheus is an open source monitoring and alerting tool that helps us to collect and expose these metrics from our application in an easy and reliable way. Then the second one is for prometheus. testproto and service TestService the label will be grpc_service="mwitkow. gin_response_body_total: Counter: the server send response body size, unit byte. gin_slow_request_total: Counter In addition to the fundamental metric types Gauge, Counter, Summary, Histogram, and Untyped, a very important part of the Prometheus data model is the partitioning of samples along dimensions called labels, which results in metric vectors. You can add constant label as it mentioned by mh-cbon, or fork go-grpc-prometheus and change it. 0 introduced an incompatibility when used together with client_golang (See #1448 for more details). the number of currently running goroutines. or this: my_metric{label="a"} 1 my_metric{label="b"} 6 my_metric{} 7. More reading on metrics and labels. At the moment my suspicion is this is triggered because "NULL" fields are actually dropped rather then returned as empty labels. My guess is it is a bug that when determining the prometheus label EnableCPUFreq is true before attacher can check the failure. 0, the Protobuf format was marked as deprecated and Prometheus stopped ingesting samples from said exposition format. Over this we then can iterate and build for instance a map. If your project uses client_golang and you want to use prometheus/common v0. This is useful for building heatmaps in Jul 18, 2019 · 概要 Metric types | Prometheus で定義されているようにPrometheusでは大きく4つのメトリクスタイプがあります。 Counter Gauge Summary Histogram 今回はGoのPrometheusクライアントライブラリを用いて各メトリクスを独自で用意する方法を説明します。 環境 Prometheus 2. func NewCounterVec1(opts prometheus. a HTTP counter partitioned by endpoints in a situation where other parts of the codebase can add endpoints. go, at least for recent prometheus client versions. With Prometheus 2. NewCounterVec(. Apr 23, 2024 · DBName: "db1", // use `DBName` as metrics label RefreshInterval: 15 , // Refresh metrics interval (default 15 seconds) PushAddr: "prometheus pusher address" , // push metrics if `PushAddr` configured Jan 26, 2021 · A Gentle Intro. histogram. FmtProtoDelim and should be used with the standard Prometheus Pushgateway. When implementing the collector for your exporter, you should never use the usual direct instrumentation approach and then update the metrics on each scrape. However, once Nov 8, 2021 · It works in the following way: The count(is_up) by (label_a) counts is_up series grouped by label_a. Summary. A Prometheus gauge is a specific type of metric used for measurements. Most metrics do have an equivalent ending with WithLabels, such methods allow to push metrics with labels and use some features of underlying Sinks (ex: translated into Prometheus labels). So we had a problem then we decided to move to go-grpc-middleware which has support for different kinds of Prometheus metrics such as counter and histogram . Counter vs. Values {. How can I join kube_pod_info & kube_pod_labels to apply label filter Feb 23, 2022 · k8s-ci-robot added needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. Inc() receiver. The fundamental types are GaugeVec, CounterVec, SummaryVec, HistogramVec, and UntypedVec. Timestamp] = val. Time]model. g. Since some of these labels may increase the cardinality of metrics, the library allows filtering labels using a allow/block list filtering system which is Feb 4, 2021 · However, there are legitimate use cases where tracking the used label names is hard. Exporter will call REST API against an application (Mirth Connect in this example) when scraped. To convert the prometheus handler to a fiber handler, i am using gofiber adaptor v2. 1 Golang 1. (This could merely be a code maintenance problem, e. mapData[val. All the code (all 90 lines of it I wrote an exporter that can connect to RMQ in one namespace, read the statistics and expose them on the /metrics so Prometheus can read it. The storage is only updated by new scrapes and then it becomes immutable. A minimal example (without actually doing anything useful like starting an HTTP listener, or actually doing anything to a metric) follows: my_metric{label="a"} 1 my_metric{label="b"} 6 my_metric{label="total"} 7. After that, you will expose metrics of a Golang prometheus counter example. https://rsm In this guide, you created two sample Go applications that expose metrics to Prometheus---one that exposes only the default Go metrics and one that also exposes a custom Prometheus counter---and configured a Prometheus instance to scrape metrics from those applications. 7 prometheus/client_golang 1. 48. In this case you need to add the following relabeling rules into metric_relabel_configs section at the corresponding scrape_config: metric_relabel_configs: - source_labels: [__name__, name] regex: "node_systemd_unit_state;(. A Counter is basic metrics that count value. 15. // valBits contains the bits of the represented float64 value, while. It also allows for performance improvements even for labeled metrics (by retrieving the leave once and then act on the leave). Buckets with vmrange labels occupy less disk space compared to Promethes-style buckets with le labels, because vmrange buckets don't include counters for the previous ranges. 0 or higher, please update client_golang to v1. testproto. The behavior of this function may change in future versions of Prometheus, including its removal from PromQL. That Mar 21, 2022 · How relabeling in Prometheus works. version: '3' services: myapp: build: context: . The result of an expression can either be shown as a graph, viewed as tabular data in Prometheus's expression browser, or consumed by external systems via the HTTP API. for package = mwitkow. To use the OpenTelemetry Collector Prometheus Exporter, you need to configure it with the desired configuration parameters. ) At first collection counters first return 0 instead of their actual value (which is still kept in the background). //. If there is any specific subject you would like me to cover in this series, feel free to reach out to me on Twitter at @PierreVincent. It also provides references to additional resources for further learning. See docs for count () aggregate function. Label uniqueness is label name + label value hashed together. +)" Its AddWithExemplar method // works like the Add method of the Counter interface but also replaces the // currently saved exemplar (if any) with a new one, created from the provided // value, the current time as timestamp, and the provided labels. Setup GO Jul 22, 2021 · You can add your curtom label there. NewCounter(). A Prometheus Info metric can be thought of as a special-case of the Prometheus Gauge metric which has a value of 1, and whose labels generally stays constant over the life of the process. The former breaks for people who do a sum() over your metric, and the latter breaks sum and is quite difficult to work with. Note // that the zone is set as a ConstLabel. 1. Reported via the mailing list: I went ahead and tried your simple example from the Go client and added a const label to the counter and the gauge. . Nov 6, 2017 · To get the accurate total requests in a period of time, we can use offset: http_requests_total - http_requests_total offset 24h. Namespace: namespace, Jun 23, 2019 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Oct 20, 2020 · Prometheus is a popular open-source systems monitoring and alerting project. That means your service always returns to Prometheus the current value of whatever it is you’re measuring. type customMetrics struct { customMetricsOne *prometheus. NET Core. Here we have a simple HTTP server with /ping endpoint which returns pong as response. GaugeVec customMetricsTwo *prometheus. Adding a label-less convenience method to XxxVec's would bloat and pollute the API. We leave these requirements. ProcessCollectorOpts{}) which gets registered in the init block of registry. Dec 1, 2023 · After collecting your Go telemetry, you must visualize them in an observability platform, in this case, Prometheus. In this blog, we will demonstrate how to implement Application Performance Monitoring (APM) using the Prometheus GoLang client libraries API and de-facto standard data Protobuf format. For this approach, you may also want to unregister collectors. E. NewDesc( prometheus Counter: all the server received request num with every uri. Mar 13, 2020 · And the second change was the creation of an endpoint that Prometheus will use to collect the data: http. Add const labels to counter. This function only acts on native histograms, which are an experimental feature. Once you discover the usefulness of Prometheus' label-based data model, you might be tempted to split up metrics by all kinds of useful label dimensions, up to the point where you create way more time series than Apr 1, 2022 · Let’s assume we decided that we want to drop prometheus_http_request_duration_seconds_bucket & prometheus_http_response_size_bytes_bucket metric, as it’s of no practical use to us. Namespace: namespace, Dec 1, 2023 · After collecting your Go telemetry, you must visualize them in an observability platform, in this case, Prometheus. Prometheus will create a new series for every unique set of labels. The label_replace() copies the label_a value to label_b for all the series returned at step 2. Sep 5, 2022 · The exported labels is 20 if no frequency option enable in BPF (-DCPU_FREQ). gin_request_body_total: Counter: the server received request body size, unit byte. Two drawbacks of this solution: . NewGauge(. Dec 22, 2017 · In the next post, we will dive into the 4 different types of Prometheus metrics (counters, gauges, histograms and summaries) and when to use them. Jun 4, 2018 · Similarly all methods contain the same rich labels: grpc_service - the gRPC service name, which is the combination of protobuf package and the grpc_service section name. 0 expose まず Apr 27, 2023 · A module that we used initially for the metric creation was a deprecated Go-Module go-grpc-prometheus and it didn’t allow developers to add custom labels to the Prometheus metric. Feb 15, 2022 · Pass metric with method label name to our middleware. Adding labels Oct 27, 2018 · I'm trying to figure out how to add a label to a prometheus collector. Handler()) This is all the changes we need to do in our application to generate the data that Prometheus will use. GaugeOpts{. @Scheduled(fixedDelay = 5000) public void increaseCounter() { ordersCreatedCounter. It is converted to a OTLP Non-Monotonic Sum, rather than an OTLP Gauge, because the value of 1 is intended to be viewed as a count, which should be summed What's Changed. 2 participants. Metric names. // It register the metrics using a custom registry and exposes them via an HTTP server Feb 22, 2018 · You probably want to implement a collector instead, and run the http request when the Prometheus server scrapes. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed. You may be using the wrong tool for this. Below is an example to count a http_request_get_books_count metrics with status label. // occurred, etc. Custom implementations may require different formats. Exporter will convert the result payload into Metrics. CounterOpts{. Also, we wary of 'series explosion'. 11. The counter is created by the following Golang code: prometheus. However, the counter "hd_errors" does not expose the const label but Jun 3, 2016 · Prometheus is a pull-based system, if you want push-based monitoring, you need to use a gateway of some sort. prometheus/client_golang. Dec 4, 2017 · Unfortunately, it is not possible to change the labels on old metrics in Prometheus. Prometheus is regularly scraping your service for metrics though, and when your gauge’s current value is returned Prometheus stores We'll use Counter, Gauge, Histogram, and Summary Prometheus metric types to monitor our Golang app. Apr 10, 2024 · Prometheus, a Cloud Native Computing Foundation project, is a systems and service monitoring system. Value. This is as far as i can trace it. // NewClusterManager creates the two metric vectors OOMCount and RAMUsage. See the best practices. Oct 14, 2021 · Prometheus metrics libraries have been widely adopted by various monitoring systems such as InfluxDB, OpenTSDB, Graphite, and Scout APM, in addition to Prometheus users. if you want to delete everything just use x. In case several Prometheus instances scrapes your exporter, you can also define a Warm-up duration (usually set to the scrape period) during which counters are collected with 0 value. GaugeVec Initialized bool } func newCustomMetrics () (m *customMetrics) { m = &customMetrics { customMetricsOne Instrumenting HTTP server written in Go | Prometheus. // in the struct to guarantee alignment for atomic operations. The module prometheus/common v0. labels Feb 23, 2022 Copy link Jan 27, 2015 · Successfully merging a pull request may close this issue. 1. // also go down, e. GitHub Gist: instantly share code, notes, and snippets. // valInt stores values that are exact integers. Here, I want to include filter based on labels as well. The documentation here is only a minimal quick start. An example of Counter usage is to count incoming request to your server. Empty Labels // will lead to a valid (label-less) exemplar. Nov 5, 2018 · 0. // "counters" are represented by Gauges. increment(); } Refreshing the Prometheus query, we can see that the value increases as expected. naming conventions, differently. The value can’t be decreased. An example of my exporter: // prometheus go client. Set(seriesValue) 3. 0. otherwise, you'll get an exception. (It's different in each instance of the // ClusterManager, but constant over the lifetime of an instance. For detailed guidance on using Prometheus in your solutions, refer to the prometheus-users discussion group. Both have to go first. Some client libraries, for example Go, will actively try to stop you doing May 20, 2019 · Figure 1 – query result for our counter metric. Prometheus provides a functional query language called PromQL (Prometheus Query Language) that lets the user select and aggregate time series data in real time. remove(label_values_list) Note:- you must provide all values of the label instance you want to delete and the order must match the label_names that were declared when the gauge metric was created. With(seriesLabelSet). 2. 44. Matrix)[0]. // It register the metrics using a custom registry and exposes them via an HTTP server That implies that it cannot be used to count items whose number can. Histogram. 0 with Golang 1. May 4, 2023 · I am using v1. kube_pod_info{namespace="test"}---> Filters pods by namespace test. Two drawbacks of this solution: Apr 12, 2018 · On initialisation client_golang registers 2 Prometheus collectors: Process Collector – which collects basic Linux process information like CPU, memory, file descriptor usage and start time. For convenience, this method returns a pointer to the Pusher itself. Any ideas what I'm missing here? I have two files: main. 12. 4 days ago · The default format is expfmt. In this article, you will learn the basics of Prometheus including what metrics are, the different types of metrics and when they are used. The only difference is that a Counter only has the . Dec 28, 2017 · Creating a Counter is very similar to a Gauge, using prometheus. 1 or above, in order to stop being affected you can: Remove method label name from counter/gauge you use in the InstrumentHandler. Patches #962 #987; Workarounds. Earlier versions of Prometheus supported an exposition format based on Protocol Buffers (aka Protobuf) in addition to the current text-based format. CounterOpts, labelName string, labelValues []string) *CounterVec1 { v := CounterVec1{ desc: prometheus. The purpose of this post is to explain the value of Prometheus’ relabel_config block, the different places where it can be found, and its usefulness in taming Prometheus metrics. Go Collector – which collects information about Go’s runtime like details about GC, number of gouroutines and OS threads. 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. Jun 7, 2017 · 1. Those. Aug 18, 2020 · The SampleStream then has a Metric and Values of type []SamplePair. Related videos 👨🏫 👉 [Playlist] Kubernete Jan 29, 2024 · What I do basically is: 1. Jun 2, 2016 · The ability to use the "leaves" in the tree directly (they also implement Collector) is the client_golang way to provide said convenience. I am unable to comprehend the things inside the Gather() function due to my limited knowledge of the library. Jan 7, 2021 · At first, you have to write a new promehetus collector that implements Collector interface, then you provide your logic to set the custom timestamp for your metric. There is no way to add a custom label to go-grpc-prometheus. Dec 11, 2022 · Mistake 1: Cardinality bombs. Many CNCF projects now use the Prometheus metrics format to expose out-of-the-box metrics. mapData := make(map[model. Spin up the first goroutine for the main server and the second one for the prometheus metrics endpoint. Aug 29, 2022 · Say my counter has had gone from 1000 to 1600 in one hour, I expect the above to returns 600, but get ~5. The count(is_active) by (label_b) counts is_active series grouped by label_b. TestService". Jun 25, 2022 · Sometimes sends the Reason tag and sometimes not. NewDesc( prometheus Jul 20, 2020 · Prometheus data is, typically, increasing metrics. Sep 20, 2020 · Goal. If you take a look at the declaration of counter metrics type from prometheus/client_golang. (model. go and collector. These are currently only differentiated in the client libraries (to enable APIs tailored to the usage of the specific types) and in the wire protocol. Next, let’s adjust the sample app to increase the counter every few seconds. The exporter allows you to add custom labels and metadata func NewCounterVec1(opts prometheus. All Prometheus metrics are based on time series - streams of timestamped values belonging to the same metric. We will now set up a local environment to facilitate testing. May 28, 2020 · How To Use Counter Metrics. Modify the docker-compose. I found that it looks like an array that stores hashes and label values is being changed: it seems that the number that corresponds to its hash is changing, but I could not understand the possible reason for this behavior: Jul 28, 2023 · OpenTelemetry Collector Prometheus Exporter is a component that allows users to export metrics from the OpenTelemetry Collector to the Prometheus monitoring system. I decided not to post any code in this article. 7以上)1) 下载对应的prometheus包 2)程序主函数: 指标类别Prometheus中主要使用的四类指标类型,如下所示 Counter ( Mar 21, 2022 · How relabeling in Prometheus works. import (. In this tutorial we will create a simple Go HTTP server and instrumentation it by adding a counter metric to keep count of the total number of requests processed by the server. Gauge. uk zn pl hn jh ms oq ot wi wj