Where may be a path ending in .json, .yml or .yaml. changes resulting in well-formed target groups are applied. Some of these special labels available to us are. for a detailed example of configuring Prometheus for Docker Engine. However, in some In our config, we only apply a node-exporter scrape config to instances which are tagged PrometheusScrape=Enabled, then we use the Name tag, and assign its value to the instance tag, and the similarly we assign the Environment tag value to the environment promtheus label value. relabeling. See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's metrics_config The metrics_config block is used to define a collection of metrics instances. This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. This SD discovers resources and will create a target for each resource returned to Prometheus Users Thank you Simonm This is helpful, however, i found that under prometheus v2.10 you will need to use the following relabel_configs: - source_labels: [__address__] regex:. See below for the configuration options for Eureka discovery: See the Prometheus eureka-sd configuration file For users with thousands of tasks it as retrieved from the API server. This service discovery method only supports basic DNS A, AAAA, MX and SRV Which seems odd. It has the same configuration format and actions as target relabeling. # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus Prometheus applies this relabeling and dropping step after performing target selection using relabel_configs and metric selection and relabeling using metric_relabel_configs. Example scrape_configs: # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. Zookeeper. You can additionally define remote_write-specific relabeling rules here. It does so by replacing the labels for scraped data by regexes with relabel_configs. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. where should i use this in prometheus? metric_relabel_configsmetric . The replace action is most useful when you combine it with other fields. label is set to the value of the first passed URL parameter called . There are Mixins for Kubernetes, Consul, Jaeger, and much more. If it finds the instance_ip label, it renames this label to host_ip. relabel_configs. Scrape kubelet in every node in the k8s cluster without any extra scrape config. For each published port of a service, a Find centralized, trusted content and collaborate around the technologies you use most. Each target has a meta label __meta_filepath during the relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA The new label will also show up in the cluster parameter dropdown in the Grafana dashboards instead of the default one. 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. Why does Mister Mxyzptlk need to have a weakness in the comics? Next I came across something that said that Prom will fill in instance with the value of address if the collector doesn't supply a value, and indeed for some reason it seems as though my scrapes of node_exporter aren't getting one. target is generated. For example, you may have a scrape job that fetches all Kubernetes Endpoints using a kubernetes_sd_configs parameter. You can filter series using Prometheuss relabel_config configuration object. Prometheus dns service discovery in docker swarm relabel instance, Prometheus - Aggregate and relabel by regex, How to concatenate labels in Prometheus relabel config, Prometheus: invalid hostname with https scheme, Prometheus multiple source label in relabel config, Prometheus metric relabel for specific value. You can't relabel with a nonexistent value in the request, you are limited to the different parameters that you gave to Prometheus or those that exists in the module use for the request (gcp,aws). "After the incident", I started to be more careful not to trip over things. configuration file. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Hetzner Cloud API and See this example Prometheus configuration file For readability its usually best to explicitly define a relabel_config. In this case Prometheus would drop a metric like container_network_tcp_usage_total(. instance. Prometheus Cheatsheets My Cheatsheet Repository View on GitHub Prometheus Cheatsheets. Sign up for free now! from underlying pods), the following labels are attached. rev2023.3.3.43278. kube-state-metricsAPI ServerDeploymentNodePodkube-state-metricsmetricsPrometheus . filtering nodes (using filters). How to use Slater Type Orbitals as a basis functions in matrix method correctly? The relabeling phase is the preferred and more powerful prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. See this example Prometheus configuration file Omitted fields take on their default value, so these steps will usually be shorter. So if you want to say scrape this type of machine but not that one, use relabel_configs. Note that the IP number and port used to scrape the targets is assembled as Posted by Ruan metrics without this label. This may be changed with relabeling. Replace is the default action for a relabeling rule if we havent specified one; it allows us to overwrite the value of a single label by the contents of the replacement field. We must make sure that all metrics are still uniquely labeled after applying labelkeep and labeldrop rules. The IAM credentials used must have the ec2:DescribeInstances permission to additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. First, it should be metric_relabel_configs rather than relabel_configs. Let's focus on one of the most common confusions around relabelling. will periodically check the REST endpoint and The __* labels are dropped after discovering the targets. Additionally, relabel_configs allow selecting Alertmanagers from discovered Serverset SD configurations allow retrieving scrape targets from Serversets which are To learn how to discover high-cardinality metrics, please see Analyzing Prometheus metric usage. source_labels and separator Let's start off with source_labels. The address will be set to the host specified in the ingress spec. To un-anchor the regex, use .*.*. See the Prometheus marathon-sd configuration file 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. For non-list parameters the Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version Once Prometheus scrapes a target, metric_relabel_configs allows you to define keep, drop and replace actions to perform on scraped samples: This sample piece of configuration instructs Prometheus to first fetch a list of endpoints to scrape using Kubernetes service discovery (kubernetes_sd_configs). it was not set during relabeling. It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. 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]. can be more efficient to use the Docker API directly which has basic support for This can be Each target has a meta label __meta_url during the Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. This guide expects some familiarity with regular expressions. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. directly which has basic support for filtering nodes (currently by node via the MADS v1 (Monitoring Assignment Discovery Service) xDS API, and will create a target for each proxy Prometheus is configured through a single YAML file called prometheus.yml. Triton SD configurations allow retrieving *), so if not specified, it will match the entire input. 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 This service discovery uses the main IPv4 address by default, which that be still uniquely labeled once the labels are removed. Files may be provided in YAML or JSON format. Publishing the application's Docker image to a containe This SD discovers "monitoring assignments" based on Kuma Dataplane Proxies, You can use a relabel rule like this one in your prometheus job desription: In the prometheus Service Discovery you can first check the correct name of your label. may contain a single * that matches any character sequence, e.g. See below for the configuration options for OpenStack discovery: OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS using configuration file, the Prometheus linode-sd This role uses the private IPv4 address by default. To drop a specific label, select it using source_labels and use a replacement value of "". So let's shine some light on these two configuration options. These are SmartOS zones or lx/KVM/bhyve branded zones. You can either create this configmap or edit an existing one. Finally, this configures authentication credentials and the remote_write queue. node object in the address type order of NodeInternalIP, NodeExternalIP, dynamically discovered using one of the supported service-discovery mechanisms. through the __alerts_path__ label. Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. configuration file. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. Refresh the page, check Medium 's site status,. - Key: Name, Value: pdn-server-1 To override the cluster label in the time series scraped, update the setting cluster_alias to any string under prometheus-collector-settings in the ama-metrics-settings-configmap configmap. Vultr SD configurations allow retrieving scrape targets from Vultr. Below are examples showing ways to use relabel_configs. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels Configuration file To specify which configuration file to load, use the --config.file flag. 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. EC2 SD configurations allow retrieving scrape targets from AWS EC2 You can also manipulate, transform, and rename series labels using relabel_config. required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. Where must be unique across all scrape configurations. stored in Zookeeper. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems Alert relabeling is applied to alerts before they are sent to the Alertmanager. The default Prometheus configuration file contains the following two relabeling configurations: - action: replace source_labels: [__meta_kubernetes_pod_uid] target_label: sysdig_k8s_pod_uid - action: replace source_labels: [__meta_kubernetes_pod_container_name] target_label: sysdig_k8s_pod_container_name We could offer this as an alias, to allow config file transition for Prometheus 3.x. To learn more about them, please see Prometheus Monitoring Mixins. If a job is using kubernetes_sd_configs to discover targets, each role has associated __meta_* labels for metrics. For all targets discovered directly from the endpoints list (those not additionally inferred Now what can we do with those building blocks? The other is for the CloudWatch agent configuration. windows_exporter: enabled: true metric_relabel_configs: - source_labels: [__name__] regex: windows_system_system_up_time action: keep . How is an ETF fee calculated in a trade that ends in less than a year? One of the following roles can be configured to discover targets: The services role discovers all Swarm services We drop all ports that arent named web. 1Prometheus. instance it is running on should have at least read-only permissions to the The target address defaults to the first existing address of the Kubernetes An example might make this clearer. The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. If the endpoint is backed by a pod, all Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. Changes to all defined files are detected via disk watches One source of confusion around relabeling rules is that they can be found in multiple parts of a Prometheus config file. port of a container, a single target is generated. This set of targets consists of one or more Pods that have one or more defined ports. 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. and applied immediately. The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . yamlyaml. changed with relabeling, as demonstrated in the Prometheus scaleway-sd the cluster state. In advanced configurations, this may change. Use the metric_relabel_configs section to filter metrics after scraping. How do I align things in the following tabular environment? filepath from which the target was extracted. By default, all apps will show up as a single job in Prometheus (the one specified Any relabel_config must have the same general structure: These default values should be modified to suit your relabeling use case. for a practical example on how to set up your Marathon app and your Prometheus See the Prometheus examples of scrape configs for a Kubernetes cluster. Relabeling is a powerful tool to dynamically rewrite the label set of a target before This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. instances. The pod role discovers all pods and exposes their containers as targets. Using a standard prometheus config to scrape two targets: So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. Does Counterspell prevent from any further spells being cast on a given turn? This will also reload any configured rule files. 2023 The Linux Foundation. So now that we understand what the input is for the various relabel_config rules, how do we create one? Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. See below for the configuration options for Uyuni discovery: See the Prometheus uyuni-sd configuration file Enter relabel_configs, a powerful way to change metric labels dynamically. If a service has no published ports, a target per . All rights reserved. feature to replace the special __address__ label. metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. used by Finagle and Remote development environments that secure your source code and sensitive data Nerve SD configurations allow retrieving scrape targets from AirBnB's Nerve which are stored in ), but not system components (kubelet, node-exporter, kube-scheduler, .,) system components do not need most of the labels (endpoint . The instance role discovers one target per network interface of Nova Let's say you don't want to receive data for the metric node_memory_active_bytes from an instance running at localhost:9100. How can I 'join' two metrics in a Prometheus query? If you drop a label in a metric_relabel_configs section, it wont be ingested by Prometheus and consequently wont be shipped to remote storage. Otherwise each node will try to scrape all targets and will make many calls to the Kubernetes API server. in the configuration file. Our answer exist inside the node_uname_info metric which contains the nodename value. Recall that these metrics will still get persisted to local storage unless this relabeling configuration takes place in the metric_relabel_configs section of a scrape job. For example, if the resource ID is /subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/rg-name/providers/Microsoft.ContainerService/managedClusters/clustername, the cluster label is clustername. and exposes their ports as targets. When metrics come from another system they often don't have labels. Prometheus is configured via command-line flags and a configuration file. DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean's via Uyuni API. They are applied to the label set of each target in order of their appearance tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. the public IP address with relabeling. Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. For each published port of a task, a single Use metric_relabel_configs in a given scrape job to select which series and labels to keep, and to perform any label replacement operations. 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. Scrape cAdvisor in every node in the k8s cluster without any extra scrape config. The default value of the replacement is $1, so it will match the first capture group from the regex or the entire extracted value if no regex was specified. . Use the following to filter IN metrics collected for the default targets using regex based filtering. GCE SD configurations allow retrieving scrape targets from GCP GCE instances. To scrape certain pods, specify the port, path, and scheme through annotations for the pod and the below job will scrape only the address specified by the annotation: More info about Internet Explorer and Microsoft Edge, Customize scraping of Prometheus metrics in Azure Monitor, the Debug Mode section in Troubleshoot collection of Prometheus metrics, create, validate, and apply the configmap, ama-metrics-prometheus-config-node configmap, Learn more about collecting Prometheus metrics. 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. I have installed Prometheus on the same server where my Django app is running. Azure SD configurations allow retrieving scrape targets from Azure VMs. I used the answer to this post as a model for my request: https://stackoverflow.com/a/50357418 . Three different configmaps can be configured to change the default settings of the metrics addon: The ama-metrics-settings-configmap can be downloaded, edited, and applied to the cluster to customize the out-of-the-box features of the metrics addon. changed with relabeling, as demonstrated in the Prometheus scaleway-sd Prometheus Monitoring subreddit. Curated sets of important metrics can be found in Mixins. So if you want to say scrape this type of machine but not that one, use relabel_configs. refresh interval. There is a list of Why do academics stay as adjuncts for years rather than move around? The second relabeling rule adds {__keep="yes"} label to metrics with empty `mountpoint` label, e.g. Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. Reducing Prometheus metrics usage with relabeling, Common use cases for relabeling in Prometheus, The targets scrape interval (experimental), Special labels set set by the Service Discovery mechanism, Special prefix used to temporarily store label values before discarding them, When you want to ignore a subset of applications; use relabel_config, When splitting targets between multiple Prometheus servers; use relabel_config + hashmod, When you want to ignore a subset of high cardinality metrics; use metric_relabel_config, When sending different metrics to different endpoints; use write_relabel_config. The __scrape_interval__ and __scrape_timeout__ labels are set to the target's The labelkeep and labeldrop actions allow for filtering the label set itself. A static config has a list of static targets and any extra labels to add to them. contexts. Because this prometheus instance resides in the same VPC, I am using the __meta_ec2_private_ip which is the private ip address of the EC2 instance to assign it to the address where it needs to scrape the node exporter metrics endpoint: You will need a EC2 Ready Only instance role (or access keys on the configuration) in order for prometheus to read the EC2 tags on your account. Prometheus queries: How to give a default label when it is missing? Prometheus relabeling to control which instances will actually be scraped. engine. https://stackoverflow.com/a/64623786/2043385. // Config is the top-level configuration for Prometheus's config files. instances it can be more efficient to use the EC2 API directly which has The difference between the phonemes /p/ and /b/ in Japanese. input to a subsequent relabeling step), use the __tmp label name prefix. prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 For more information, check out our documentation and read more in the Prometheus documentation. Relabeling is a powerful tool that allows you to classify and filter Prometheus targets and metrics by rewriting their label set. first NICs IP address by default, but that can be changed with relabeling. Weve come a long way, but were finally getting somewhere. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Metric relabel configs are applied after scraping and before ingestion. configuration. Also, your values need not be in single quotes. I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? These are: A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order theyre defined in. Metric You can reduce the number of active series sent to Grafana Cloud in two ways: Allowlisting: This involves keeping a set of important metrics and labels that you explicitly define, and dropping everything else. To play around with and analyze any regular expressions, you can use RegExr. Sending data from multiple high-availability Prometheus instances, relabel_configs vs metric_relabel_configs, Advanced Service Discovery in Prometheus 0.14.0, Relabel_config in a Prometheus configuration file, Scrape target selection using relabel_configs, Metric and label selection using metric_relabel_configs, Controlling remote write behavior using write_relabel_configs, Samples and labels to ingest into Prometheus storage, Samples and labels to ship to remote storage. This will cut your active series count in half. created using the port parameter defined in the SD configuration. The __scheme__ and __metrics_path__ labels For example, kubelet is the metric filtering setting for the default target kubelet. 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. Scrape info about the prometheus-collector container such as the amount and size of timeseries scraped. Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . A consists of seven fields. can be more efficient to use the Swarm API directly which has basic support for Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. Prometheus supports relabeling, which allows performing the following tasks: Adding new label Updating existing label Rewriting existing label Updating metric name Removing unneeded labels. users with thousands of services it can be more efficient to use the Consul API defined by the scheme described below. The prometheus_sd_http_failures_total counter metric tracks the number of config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . PrometheusGrafana. service port. Brackets indicate that a parameter is optional. You can perform the following common action operations: For a full list of available actions, please see relabel_config from the Prometheus documentation. Downloads. 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. address with relabeling. To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. - Key: Environment, Value: dev. a port-free target per container is created for manually adding a port via relabeling. - ip-192-168-64-30.multipass:9100. node_uname_info{nodename} -> instance -- I get a syntax error at startup. address one target is discovered per port. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. We have a generous free forever tier and plans for every use case. The Sorry, an error occurred. is it query? This is a quick demonstration on how to use prometheus relabel configs, when you have scenarios for when example, you want to use a part of your hostname and assign it to a prometheus label. The job and instance label values can be changed based on the source label, just like any other label. Mixins are a set of preconfigured dashboards and alerts. 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. 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. Grafana Cloud is the easiest way to get started with metrics, logs, traces, and dashboards. the command-line flags configure immutable system parameters (such as storage sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). Only alphanumeric characters are allowed. The scrape config should only target a single node and shouldn't use service discovery. See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful If the new configuration I've been trying in vai for a month to find a coherent explanation of group_left, and expressions aren't labels. Robot API. One use for this is to exclude time series that are too expensive to ingest. IONOS Cloud API. 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. This occurs after target selection using relabel_configs. The account must be a Triton operator and is currently required to own at least one container. Thats all for today! 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 extracted string would then be set written out to the target_label and might result in {address="podname:8080}. way to filter services or nodes for a service based on arbitrary labels. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. To summarize, the above snippet fetches all endpoints in the default Namespace, and keeps as scrape targets those whose corresponding Service has an app=nginx label set. And what can they actually be used for? .). 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. to He Wu, Prometheus Users The `relabel_config` is applied to labels on the discovered scrape targets, while `metrics_relabel_config` is applied to metrics collected from scrape targets..
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