Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. A DNS-based service discovery configuration allows specifying a set of DNS This is experimental and could change in the future. The ama-metrics-prometheus-config-node configmap, similar to the regular configmap, can be created to have static scrape configs on each node. (relabel_config) prometheus . In this scenario, on my EC2 instances I have 3 tags: As we did with Instance labelling in the last post, it'd be cool if we could show instance=lb1.example.com instead of an IP address and port. Having to tack an incantation onto every simple expression would be annoying; figuring out how to build more complex PromQL queries with multiple metrics is another entirely. relabeling phase. Setup monitoring with Prometheus and Grafana in Kubernetes Start monitoring your Kubernetes Geoffrey Mariette in Better Programming Create Your Python's Custom Prometheus Exporter Tony in Dev Genius K8s ChatGPT Bot For Intelligent Troubleshooting Stefanie Lai in Dev Genius All You Need to Know about Debugging Kubernetes Cronjob Help Status If we provide more than one name in the source_labels array, the result will be the content of their values, concatenated using the provided separator. Labels are sets of key-value pairs that allow us to characterize and organize whats actually being measured in a Prometheus metric. configuration. So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. It does so by replacing the labels for scraped data by regexes with relabel_configs. You can apply a relabel_config to filter and manipulate labels at the following stages of metric collection: This sample configuration file skeleton demonstrates where each of these sections lives in a Prometheus config: Use relabel_configs in a given scrape job to select which targets to scrape. If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. A scrape_config section specifies a set of targets and parameters describing how Metric The target address defaults to the first existing address of the Kubernetes Email update@grafana.com for help. See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version Grafana Labs uses cookies for the normal operation of this website. This service discovery uses the public IPv4 address by default, but that can be // Config is the top-level configuration for Prometheus's config files. Only alphanumeric characters are allowed. Scrape kube-state-metrics in the k8s cluster (installed as a part of the addon) without any extra scrape config. Files must contain a list of static configs, using these formats: As a fallback, the file contents are also re-read periodically at the specified An additional scrape config uses regex evaluation to find matching services en masse, and targets a set of services based on label, annotation, namespace, or name. for a detailed example of configuring Prometheus for Docker Swarm. The pod role discovers all pods and exposes their containers as targets. Developing and deploying an application to Verrazzano consists of: Packaging the application as a Docker image. The regex is A tls_config allows configuring TLS connections. The hashmod action provides a mechanism for horizontally scaling Prometheus. The regex field expects a valid RE2 regular expression and is used to match the extracted value from the combination of the source_label and separator fields. Default targets are scraped every 30 seconds. "After the incident", I started to be more careful not to trip over things. Let's focus on one of the most common confusions around relabelling. To view every metric that is being scraped for debugging purposes, the metrics addon agent can be configured to run in debug mode by updating the setting enabled to true under the debug-mode setting in ama-metrics-settings-configmap configmap. But what about metrics with no labels? - Key: Environment, Value: dev. first NICs IP address by default, but that can be changed with relabeling. To filter by them at the metrics level, first keep them using relabel_configs by assigning a label name and then use metric_relabel_configs to filter. Let's say you don't want to receive data for the metric node_memory_active_bytes from an instance running at localhost:9100. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. Serversets are commonly So if you want to say scrape this type of machine but not that one, use relabel_configs. I have suggested calling it target_relabel_configs to differentiate it from metric_relabel_configs. Weve come a long way, but were finally getting somewhere. Add a new label called example_label with value example_value to every metric of the job. The HAProxy metrics have been discovered by Prometheus. So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. Hope you learned a thing or two about relabeling rules and that youre more comfortable with using them. This can be useful when local Prometheus storage is cheap and plentiful, but the set of metrics shipped to remote storage requires judicious curation to avoid excess costs. See the Prometheus marathon-sd configuration file OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova You can filter series using Prometheuss relabel_config configuration object. are set to the scheme and metrics path of the target respectively. The following meta labels are available on all targets during relabeling: The labels below are only available for targets with role set to hcloud: The labels below are only available for targets with role set to robot: HTTP-based service discovery provides a more generic way to configure static targets Some of these special labels available to us are. A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. Sorry, an error occurred. How to use Slater Type Orbitals as a basis functions in matrix method correctly? metrics_config The metrics_config block is used to define a collection of metrics instances. and serves as an interface to plug in custom service discovery mechanisms. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. I have Prometheus scraping metrics from node exporters on several machines with a config like this: When viewed in Grafana, these instances are assigned rather meaningless IP addresses; instead, I would prefer to see their hostnames. To drop a specific label, select it using source_labels and use a replacement value of "". <__meta_consul_address>:<__meta_consul_service_port>. filtering containers (using filters). relabeling phase. Open positions, Check out the open source projects we support Each pod of the daemonset will take the config, scrape the metrics, and send them for that node. Where may be a path ending in .json, .yml or .yaml. s. sudo systemctl restart prometheus This is most commonly used for sharding multiple targets across a fleet of Prometheus instances. directly which has basic support for filtering nodes (currently by node I think you should be able to relabel the instance label to match the hostname of a node, so I tried using relabelling rules like this, to no effect whatsoever: I can manually relabel every target, but that requires hardcoding every hostname into Prometheus, which is not really nice. You can additionally define remote_write-specific relabeling rules here. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Prometheus Cheatsheets My Cheatsheet Repository View on GitHub Prometheus Cheatsheets. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. For example, when measuring HTTP latency, we might use labels to record the HTTP method and status returned, which endpoint was called, and which server was responsible for the request. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Prometheus also provides some internal labels for us. The global configuration specifies parameters that are valid in all other configuration Email update@grafana.com for help. Omitted fields take on their default value, so these steps will usually be shorter. my/path/tg_*.json. All rights reserved. You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. Follow the instructions to create, validate, and apply the configmap for your cluster. A relabel_configs configuration allows you to keep or drop targets returned by a service discovery mechanism like Kubernetes service discovery or AWS EC2 instance service discovery. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. scrape targets from Container Monitor instances. In this guide, weve presented an overview of Prometheuss powerful and flexible relabel_config feature and how you can leverage it to control and reduce your local and Grafana Cloud Prometheus usage. In the extreme this can overload your Prometheus server, such as if you create a time series for each of hundreds of thousands of users. To bulk drop or keep labels, use the labelkeep and labeldrop actions. With this, the node_memory_Active_bytes metric which contains only instance and job labels by default, gets an additional nodename label that you can use in the description field of Grafana. For instance, if you created a secret named kube-prometheus-prometheus-alert-relabel-config and it contains a file named additional-alert-relabel-configs.yaml, use the parameters below: Prometheus fetches an access token from the specified endpoint with There is a list of The account must be a Triton operator and is currently required to own at least one container. This occurs after target selection using relabel_configs. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). This may be changed with relabeling. Prometheus metric_relabel_configs . used by Finagle and The scrape intervals have to be set by customer in the correct format specified here, else the default value of 30 seconds will be applied to the corresponding targets. Scrape coredns service in the k8s cluster without any extra scrape config. The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. target is generated. Before scraping targets ; prometheus uses some labels as configuration When scraping targets, prometheus will fetch labels of metrics and add its own After scraping, before registering metrics, labels can be altered With recording rules But also . - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . Robot API. Azure SD configurations allow retrieving scrape targets from Azure VMs. Remote development environments that secure your source code and sensitive data For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. Prometheus queries: How to give a default label when it is missing? . which automates the Prometheus setup on top of Kubernetes. Hetzner Cloud API and Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. For users with thousands of tasks it Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. Use Grafana to turn failure into resilience. The __scrape_interval__ and __scrape_timeout__ labels are set to the target's I have installed Prometheus on the same server where my Django app is running. Create Your Python's Custom Prometheus Exporter Tony DevOps in K8s K9s, Terminal Based UI to Manage Your Cluster Kirshi Yin in Better Programming How To Monitor a Spring Boot App With. Publishing the application's Docker image to a containe Additionally, relabel_configs allow advanced modifications to any One of the following role types can be configured to discover targets: The node role discovers one target per cluster node with the address defaulting relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA For example, the following block would set a label like {env="production"}, While, continuing with the previous example, this relabeling step would set the replacement value to my_new_label. . way to filter targets based on arbitrary labels. via Uyuni API. To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. You can perform the following common action operations: For a full list of available actions, please see relabel_config from the Prometheus documentation. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd Using the __meta_kubernetes_service_label_app label filter, endpoints whose corresponding services do not have the app=nginx label will be dropped by this scrape job. If a service has no published ports, a target per OAuth 2.0 authentication using the client credentials grant type. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. May 29, 2017. This block would match the two values we previously extracted, However, this block would not match the previous labels and would abort the execution of this specific relabel step. Prometheus Monitoring subreddit. To play around with and analyze any regular expressions, you can use RegExr. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. *), so if not specified, it will match the entire input. may contain a single * that matches any character sequence, e.g. Heres an example. where should i use this in prometheus? When metrics come from another system they often don't have labels. After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's After changing the file, the prometheus service will need to be restarted to pickup the changes. It would also be less than friendly to expect any of my users -- especially those completely new to Grafana / PromQL -- to write a complex and inscrutable query every time. filepath from which the target was extracted. of your services provide Prometheus metrics, you can use a Marathon label and Endpoints are limited to the kube-system namespace. Relabeling is a powerful tool that allows you to classify and filter Prometheus targets and metrics by rewriting their label set. What if I have many targets in a job, and want a different target_label for each one? EC2 SD configurations allow retrieving scrape targets from AWS EC2 This solution stores data at scrape-time with the desired labels, no need for funny PromQL queries or hardcoded hacks. for them. See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful They also serve as defaults for other configuration sections. In many cases, heres where internal labels come into play. There's the idea that the exporter should be "fixed', but I'm hesitant to go down the rabbit hole of a potentially breaking change to a widely used project. The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. changed with relabeling, as demonstrated in the Prometheus hetzner-sd Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. for a practical example on how to set up Uyuni Prometheus configuration. The following meta labels are available on targets during relabeling: See below for the configuration options for Azure discovery: Consul SD configurations allow retrieving scrape targets from Consul's The __address__ label is set to the : address of the target. Since weve used default regex, replacement, action, and separator values here, they can be omitted for brevity. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). Each target has a meta label __meta_filepath during the Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. inside a Prometheus-enabled mesh. This piece of remote_write configuration sets the remote endpoint to which Prometheus will push samples. You can also manipulate, transform, and rename series labels using relabel_config. integrations The endpointslice role discovers targets from existing endpointslices. Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. service account and place the credential file in one of the expected locations. 11 aylei pushed a commit to aylei/docs that referenced this issue on Oct 28, 2019 Update feature description in overview and readme ( prometheus#341) efb2912 One of the following types can be configured to discover targets: The hypervisor role discovers one target per Nova hypervisor node. Additional config for this answer: Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. The relabeling phase is the preferred and more powerful - the incident has nothing to do with me; can I use this this way? The private IP address is used by default, but may be changed to tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. compute resources. Otherwise the custom configuration will fail validation and won't be applied. For each endpoint This is to ensure that different components that consume this label will adhere to the basic alphanumeric convention. Below are examples of how to do so. Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. is not well-formed, the changes will not be applied. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. One source of confusion around relabeling rules is that they can be found in multiple parts of a Prometheus config file. A static_config allows specifying a list of targets and a common label set This is generally useful for blackbox monitoring of a service. instances, as well as Prometheus is configured via command-line flags and a configuration file. Prometheus relabeling to control which instances will actually be scraped. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. configuration file. Discover Packages github.com/prometheus/prometheus config config package Version: v0.42. For readability its usually best to explicitly define a relabel_config. The instance role discovers one target per network interface of Nova 2023 The Linux Foundation. This set of targets consists of one or more Pods that have one or more defined ports. single target is generated. Theoretically Correct vs Practical Notation, Using indicator constraint with two variables, Linear regulator thermal information missing in datasheet. If you're currently using Azure Monitor Container Insights Prometheus scraping with the setting monitor_kubernetes_pods = true, adding this job to your custom config will allow you to scrape the same pods and metrics. Using relabeling at the target selection stage, you can selectively choose which targets and endpoints you want to scrape (or drop) to tune your metric usage. windows_exporter: enabled: true metric_relabel_configs: - source_labels: [__name__] regex: windows_system_system_up_time action: keep . required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. write_relabel_configs is relabeling applied to samples before sending them For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. Mixins are a set of preconfigured dashboards and alerts. Example scrape_configs: # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. changed with relabeling, as demonstrated in the Prometheus scaleway-sd following meta labels are available on all targets during One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. If you are running the Prometheus Operator (e.g. For example, kubelet is the metric filtering setting for the default target kubelet. will periodically check the REST endpoint and The scrape config should only target a single node and shouldn't use service discovery. Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. The relabeling step calculates the MD5 hash of the concatenated label values modulo a positive integer N, resulting in a number in the range [0, N-1]. Scaleway SD configurations allow retrieving scrape targets from Scaleway instances and baremetal services. How do I align things in the following tabular environment? 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, the Prometheus digitalocean-sd Multiple relabeling steps can be configured per scrape configuration. For each published port of a service, a The HTTP header Content-Type must be application/json, and the body must be This service discovery method only supports basic DNS A, AAAA, MX and SRV First off, the relabel_configs key can be found as part of a scrape job definition. For all targets discovered directly from the endpoints list (those not additionally inferred They allow us to filter the targets returned by our SD mechanism, as well as manipulate the labels it sets. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. The CloudWatch agent with Prometheus monitoring needs two configurations to scrape the Prometheus metrics. Asking for help, clarification, or responding to other answers. Prometheus will periodically check the REST endpoint and create a target for every discovered server. Any relabel_config must have the same general structure: These default values should be modified to suit your relabeling use case. Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. See below for the configuration options for Kubernetes discovery: See this example Prometheus configuration file Downloads. The node-exporter config below is one of the default targets for the daemonset pods. by the API. This role uses the public IPv4 address by default. configuration file, the Prometheus linode-sd You can add additional metric_relabel_configs sections that replace and modify labels here. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml For Follow the instructions to create, validate, and apply the configmap for your cluster. The prometheus_sd_http_failures_total counter metric tracks the number of changed with relabeling, as demonstrated in the Prometheus digitalocean-sd 1Prometheus. Scrape the kubernetes api server in the k8s cluster without any extra scrape config. relabeling is completed. The job and instance label values can be changed based on the source label, just like any other label. Relabeling relabeling Prometheus Relabel See below for the configuration options for Triton discovery: Eureka SD configurations allow retrieving scrape targets using the Choosing which metrics and samples to scrape, store, and ship to Grafana Cloud can seem quite daunting at first. from underlying pods), the following labels are attached. For a cluster with a large number of nodes and pods and a large volume of metrics to scrape, some of the applicable custom scrape targets can be off-loaded from the single ama-metrics replicaset pod to the ama-metrics daemonset pod. This documentation is open-source. There are Mixins for Kubernetes, Consul, Jaeger, and much more. This can be job. rev2023.3.3.43278. It fetches targets from an HTTP endpoint containing a list of zero or more We've looked at the full Life of a Label. To update the scrape interval settings for any target, the customer can update the duration in default-targets-scrape-interval-settings setting for that target in ama-metrics-settings-configmap configmap.