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Weve come a long way, but were finally getting somewhere. users with thousands of services it can be more efficient to use the Consul API Refresh the page, check Medium 's site status,. value is set to the specified default. input to a subsequent relabeling step), use the __tmp label name prefix. What sort of strategies would a medieval military use against a fantasy giant? Of course, we can do the opposite and only keep a specific set of labels and drop everything else. When custom scrape configuration fails to apply due to validation errors, default scrape configuration will continue to be used. metric_relabel_configsmetric . By default, instance is set to __address__, which is $host:$port. configuration file. A DNS-based service discovery configuration allows specifying a set of DNS Connect Grafana to data sources, apps, and more, with Grafana Alerting, Grafana Incident, and Grafana OnCall, Frontend application observability web SDK, Try out and share prebuilt visualizations, Contribute to technical documentation provided by Grafana Labs, Help build the future of open source observability software The cn role discovers one target for per compute node (also known as "server" or "global zone") making up the Triton infrastructure. Remote development environments that secure your source code and sensitive data The tasks role discovers all Swarm tasks 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). could be used to limit which samples are sent. It is Catalog API. it gets scraped. 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 You can filter series using Prometheuss relabel_config configuration object. and exposes their ports as targets. their API. My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. 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 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.). Please find below an example from other exporter (blackbox), but same logic applies for node exporter as well. [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config Alertmanagers may be statically configured via the static_configs parameter or The endpoint is queried periodically at the specified refresh interval. 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. The result can then be matched against using a regex, and an action operation can be performed if a match occurs. 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). Hetzner SD configurations allow retrieving scrape targets from * action: drop metric_relabel_configs Before applying these techniques, ensure that youre deduplicating any samples sent from high-availability Prometheus clusters. Default targets are scraped every 30 seconds. Finally, the modulus field expects a positive integer. metric_relabel_configs relabel_configsreplace Prometheus K8S . Prometheus fetches an access token from the specified endpoint with The private IP address is used by default, but may be changed to I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? Additional labels prefixed with __meta_ may be available during the The __meta_dockerswarm_network_* meta labels are not populated for ports which Endpoints are limited to the kube-system namespace. 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. For users with thousands of tasks it instances it can be more efficient to use the EC2 API directly which has It does so by replacing the labels for scraped data by regexes with relabel_configs. PuppetDB resources. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. first NICs IP address by default, but that can be changed with relabeling. The file is written in YAML format, Each pod of the daemonset will take the config, scrape the metrics, and send them for that node. Choosing which metrics and samples to scrape, store, and ship to Grafana Cloud can seem quite daunting at first. Use Grafana to turn failure into resilience. See below for the configuration options for PuppetDB discovery: See this example Prometheus configuration file Omitted fields take on their default value, so these steps will usually be shorter. The following meta labels are available for each target: See below for the configuration options for Kuma MonitoringAssignment discovery: The relabeling phase is the preferred and more powerful way support for filtering instances. To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. Both of these methods are implemented through Prometheuss metric filtering and relabeling feature, relabel_config. The following rule could be used to distribute the load between 8 Prometheus instances, each responsible for scraping the subset of targets that end up producing a certain value in the [0, 7] range, and ignoring all others. Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. record queries, but not the advanced DNS-SD approach specified in Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. 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 prometheus prometheus server Pull Push . Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . Mixins are a set of preconfigured dashboards and alerts. The address will be set to the Kubernetes DNS name of the service and respective Prometheus metric_relabel_configs . See below for the configuration options for Kubernetes discovery: See this example Prometheus configuration file I'm working on file-based service discovery from a DB dump that will be able to write these targets out. In addition, the instance label for the node will be set to the node name . refresh interval. The replace action is most useful when you combine it with other fields. 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. To learn more about remote_write, please see remote_write from the official Prometheus docs. Grafana Labs uses cookies for the normal operation of this website. configuration file. After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. Scrape kubelet in every node in the k8s cluster without any extra scrape config. Refer to Apply config file section to create a configmap from the prometheus config. Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd Sign up for free now! Aurora. I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. After saving the config file switch to the terminal with your Prometheus docker container and stop it by pressing ctrl+C and start it again to reload the configuration by using the existing command. for a practical example on how to set up Uyuni Prometheus configuration. node object in the address type order of NodeInternalIP, NodeExternalIP, See below for the configuration options for Uyuni discovery: See the Prometheus uyuni-sd configuration file And if one doesn't work you can always try the other! This feature allows you to filter through series labels using regular expressions and keep or drop those that match. Yes, I know, trust me I don't like either but it's out of my control. If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems We could offer this as an alias, to allow config file transition for Prometheus 3.x. In many cases, heres where internal labels come into play. in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. compute resources. configuration. of your services provide Prometheus metrics, you can use a Marathon label and relabeling. Parameters that arent explicitly set will be filled in using default values. The regex is instances. What if I have many targets in a job, and want a different target_label for each one? Prometheusrelabel config sell prometheus Prometheus relabel config 1. scrapelabel node_exporternode_cpucpurelabel config 2. action=replace additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. It has the same configuration format and actions as target relabeling. changed with relabeling, as demonstrated in the Prometheus scaleway-sd Service API. The role will try to use the public IPv4 address as default address, if there's none it will try to use the IPv6 one. 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. The relabeling phase is the preferred and more powerful For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. 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. See this example Prometheus configuration file Step 2: Scrape Prometheus sources and import metrics. for a detailed example of configuring Prometheus for Docker Engine. This is often useful when fetching sets of targets using a service discovery mechanism like kubernetes_sd_configs, or Kubernetes service discovery. devops, docker, prometheus, Create a AWS Lambda Layer with Docker The target address defaults to the private IP address of the network to scrape them. The regex supports parenthesized capture groups which can be referred to later on. Consider the following metric and relabeling step. 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. The result of the concatenation is the string node-42 and the MD5 of the string modulus 8 is 5. Prometheus As metric_relabel_configs are applied to every scraped timeseries, it is better to improve instrumentation rather than using metric_relabel_configs as a workaround on the Prometheus side. To specify which configuration file to load, use the --config.file flag. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Write relabeling is applied after external labels. relabel_configs: - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape] action: keep regex: true // keep targets with label __meta_kubernetes_service_annotation_prometheus_io_scrape equals 'true', // which means the user added prometheus.io/scrape: true in the service's annotation. At a high level, a relabel_config allows you to select one or more source label values that can be concatenated using a separator parameter. via Uyuni API. locations, amount of data to keep on disk and in memory, etc. If not all This So if you want to say scrape this type of machine but not that one, use relabel_configs. action: keep. Serverset SD configurations allow retrieving scrape targets from Serversets which are This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. If you are running the Prometheus Operator (e.g. Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. node_uname_info{nodename} -> instance -- I get a syntax error at startup. Advanced Setup: Configure custom Prometheus scrape jobs for the daemonset First off, the relabel_configs key can be found as part of a scrape job definition. service port. For example, kubelet is the metric filtering setting for the default target kubelet. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. Note that exemplar storage is still considered experimental and must be enabled via --enable-feature=exemplar-storage. Prometheus K8SYaml K8S - ip-192-168-64-30.multipass:9100. Prometheus keeps all other metrics. changed with relabeling, as demonstrated in the Prometheus hetzner-sd relabeling does not apply to automatically generated timeseries such as up. 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. Whats the grammar of "For those whose stories they are"? The scrape config below uses the __meta_* labels added from the kubernetes_sd_configs for the pod role to filter for pods with certain annotations. this functionality. metric_relabel_configs /metricsmetric_relabel_configs 3.2.2 alertmanagers alertmanagers Prometheus alertmanagers Prometheuspushing alertmanager alertmanager target To play around with and analyze any regular expressions, you can use RegExr. Scrape node metrics without any extra scrape config. See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful Initially, aside from the configured per-target labels, a target's job external labels send identical alerts. And what can they actually be used for? Also, your values need not be in single quotes. Omitted fields take on their default value, so these steps will usually be shorter. Tracing is currently an experimental feature and could change in the future. 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 file_sd_configs: Solution: If you want to retain these labels, the relabel_configs can rewrite the label multiple times be done the following way: Doing it like this, the manually-set instance in sd_configs takes precedence, but if it's not set the port is still stripped away. Multiple relabeling steps can be configured per scrape configuration. Find centralized, trusted content and collaborate around the technologies you use most. Grafana Cloud is the easiest way to get started with metrics, logs, traces, and dashboards. created using the port parameter defined in the SD configuration. - the incident has nothing to do with me; can I use this this way? 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. create a target for every app instance. a port-free target per container is created for manually adding a port via relabeling. Example scrape_configs: # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. integrations ec2:DescribeAvailabilityZones permission if you want the availability zone ID Prometheus also provides some internal labels for us. relabeling: Kubernetes SD configurations allow retrieving scrape targets from single target is generated. OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova Configuration file To specify which configuration file to load, use the --config.file flag. See the Prometheus marathon-sd configuration file They allow us to filter the targets returned by our SD mechanism, as well as manipulate the labels it sets. The labelmap action is used to map one or more label pairs to different label names. The HTTP header Content-Type must be application/json, and the body must be 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. write_relabel_configs is relabeling applied to samples before sending them Hetzner Cloud API and For users with thousands of containers it are set to the scheme and metrics path of the target respectively. 3. The following table has a list of all the default targets that the Azure Monitor metrics addon can scrape by default and whether it's initially enabled. Otherwise the custom configuration will fail validation and won't be applied. If it finds the instance_ip label, it renames this label to host_ip. This service discovery uses the public IPv4 address by default, but that can be Downloads. Prometheus queries: How to give a default label when it is missing? 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. has the same configuration format and actions as target relabeling. You can either create this configmap or edit an existing one. In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. The cluster label appended to every time series scraped will use the last part of the full AKS cluster's ARM resourceID. Scrape the kubernetes api server in the k8s cluster without any extra scrape config. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This may be changed with relabeling. For users with thousands of Follow the instructions to create, validate, and apply the configmap for your cluster. Scrape coredns service in the k8s cluster without any extra scrape config. Its value is set to the The relabel_configs section is applied at the time of target discovery and applies to each target for the job. can be more efficient to use the Swarm API directly which has basic support for directly which has basic support for filtering nodes (currently by node 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. Publishing the application's Docker image to a containe It expects an array of one or more label names, which are used to select the respective label values. To do this, use a relabel_config object in the write_relabel_configs subsection of the remote_write section of your Prometheus config. The __* labels are dropped after discovering the targets. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. Prom Labss Relabeler tool may be helpful when debugging relabel configs. Relabeling is a powerful tool to dynamically rewrite the label set of a target before So let's shine some light on these two configuration options. However, its usually best to explicitly define these for readability. are published with mode=host. 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:. is not well-formed, the changes will not be applied. It is the canonical way to specify static targets in a scrape Scrape info about the prometheus-collector container such as the amount and size of timeseries scraped. Let's focus on one of the most common confusions around relabelling. See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. Any label pairs whose names match the provided regex will be copied with the new label name given in the replacement field, by utilizing group references (${1}, ${2}, etc). Why is there a voltage on my HDMI and coaxial cables? This is to ensure that different components that consume this label will adhere to the basic alphanumeric convention. Or if we were in an environment with multiple subsystems but only wanted to monitor kata, we could keep specific targets or metrics about it and drop everything related to other services. Or if youre using Prometheus Kubernetes service discovery you might want to drop all targets from your testing or staging namespaces. way to filter targets based on arbitrary labels. 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. The address will be set to the host specified in the ingress spec. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. Prometheus Relabling Using a standard prometheus config to scrape two targets: - ip-192-168-64-29.multipass:9100 - ip-192-168-64-30.multipass:9100 Targets discovered using kubernetes_sd_configs will each have different __meta_* labels depending on what role is specified. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. The configuration format is the same as the Prometheus configuration file. 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. It fetches targets from an HTTP endpoint containing a list of zero or more I've been trying in vai for a month to find a coherent explanation of group_left, and expressions aren't labels. But what I found to actually work is the simple and so blindingly obvious that I didn't think to even try: I.e., simply applying a target label in the scrape config. The last relabeling rule drops all the metrics without {__keep="yes"} label. the given client access and secret keys. This will also reload any configured rule files. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. To drop a specific label, select it using source_labels and use a replacement value of "". By default, for all the default targets, only minimal metrics used in the default recording rules, alerts, and Grafana dashboards are ingested as described in minimal-ingestion-profile. Going back to our extracted values, and a block like this. Since kubernetes_sd_configs will also add any other Pod ports as scrape targets (with role: endpoints), we need to filter these out using the __meta_kubernetes_endpoint_port_name relabel config. WindowsyamlLinux. This will cut your active series count in half. . One source of confusion around relabeling rules is that they can be found in multiple parts of a Prometheus config file. In those cases, you can use the relabel As an example, consider the following two metrics. configuration. for a practical example on how to set up your Eureka app and your Prometheus
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prometheus relabel_configs vs metric_relabel_configs