prometheus relabel_configs vs metric_relabel_configs
It expects an array of one or more label names, which are used to select the respective label values. Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. are set to the scheme and metrics path of the target respectively. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. 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.. The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. server sends alerts to. Robot API. Overview. # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus Please find below an example from other exporter (blackbox), but same logic applies for node exporter as well. Use Grafana to turn failure into resilience. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. s. Refer to Apply config file section to create a configmap from the prometheus config. Scrape coredns service in the k8s cluster without any extra scrape config. This guide describes several techniques you can use to reduce your Prometheus metrics usage on Grafana Cloud. First, it should be metric_relabel_configs rather than relabel_configs. changed with relabeling, as demonstrated in the Prometheus linode-sd Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml changes resulting in well-formed target groups are applied. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. DNS servers to be contacted are read from /etc/resolv.conf. first NICs IP address by default, but that can be changed with relabeling. and exposes their ports as targets. This is to ensure that different components that consume this label will adhere to the basic alphanumeric convention. with this feature. The target address defaults to the first existing address of the Kubernetes If shipping samples to Grafana Cloud, you also have the option of persisting samples locally, but preventing shipping to remote storage. 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. Choosing which metrics and samples to scrape, store, and ship to Grafana Cloud can seem quite daunting at first. Finally, the modulus field expects a positive integer. A scrape_config section specifies a set of targets and parameters describing how This piece of remote_write configuration sets the remote endpoint to which Prometheus will push samples. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. I just came across this problem and the solution is to use a group_left to resolve this problem. Does Counterspell prevent from any further spells being cast on a given turn? as retrieved from the API server. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. These are SmartOS zones or lx/KVM/bhyve branded zones. (relabel_config) prometheus . inside a Prometheus-enabled mesh. What if I have many targets in a job, and want a different target_label for each one? Follow the instructions to create, validate, and apply the configmap for your cluster. Heres an example. 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. their API. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. Curated sets of important metrics can be found in Mixins. The private IP address is used by default, but may be changed to See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. 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. 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. type Config struct {GlobalConfig GlobalConfig `yaml:"global"` AlertingConfig AlertingConfig `yaml:"alerting,omitempty"` RuleFiles []string `yaml:"rule_files,omitempty"` ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"` . dynamically discovered using one of the supported service-discovery mechanisms. directly which has basic support for filtering nodes (currently by node single target is generated. discover scrape targets, and may optionally have the Some of these special labels available to us are. In this scenario, on my EC2 instances I have 3 tags: for a practical example on how to set up your Eureka app and your Prometheus 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. Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. Consider the following metric and relabeling step. To specify which configuration file to load, use the --config.file flag. It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. Relabeler allows you to visually confirm the rules implemented by a relabel config. sudo systemctl restart prometheus configuration file. it gets scraped. So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. This will also reload any configured rule files. We could offer this as an alias, to allow config file transition for Prometheus 3.x. First off, the relabel_configs key can be found as part of a scrape job definition. One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. RFC6763. configuration file. Scaleway SD configurations allow retrieving scrape targets from Scaleway instances and baremetal services. If the endpoint is backed by a pod, all 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. Mixins are a set of preconfigured dashboards and alerts. - Key: Name, Value: pdn-server-1 And if one doesn't work you can always try the other! This configuration does not impact any configuration set in metric_relabel_configs or relabel_configs. Hetzner SD configurations allow retrieving scrape targets from The labels can be used in the relabel_configs section to filter targets or replace labels for the targets. An example might make this clearer. Kuma SD configurations allow retrieving scrape target from the Kuma control plane. To learn more about the general format for a relabel_config block, please see relabel_config from the Prometheus docs. rev2023.3.3.43278. The private IP address is used by default, but may be changed to the public IP The write_relabel_configs section defines a keep action for all metrics matching the apiserver_request_total|kubelet_node_config_error|kubelet_runtime_operations_errors_total regex, dropping all others. One use for this is to exclude time series that are too expensive to ingest. Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . The instance role discovers one target per network interface of Nova You can, for example, only keep specific metric names. The service role discovers a target for each service port for each service. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. The last path segment 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. for a detailed example of configuring Prometheus for Docker Swarm. to the Kubelet's HTTP port. See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful the given client access and secret keys. To bulk drop or keep labels, use the labelkeep and labeldrop actions. After changing the file, the prometheus service will need to be restarted to pickup the changes. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. <__meta_consul_address>:<__meta_consul_service_port>. Metric relabeling is applied to samples as the last step before ingestion. If you are running the Prometheus Operator (e.g. 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. Weve come a long way, but were finally getting somewhere. If a relabeling step needs to store a label value only temporarily (as the Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. Allowlisting or keeping the set of metrics referenced in a Mixins alerting rules and dashboards can form a solid foundation from which to build a complete set of observability metrics to scrape and store. The We've looked at the full Life of a Label. Prometheus keeps all other metrics. May 30th, 2022 3:01 am Serversets are commonly The private IP address is used by default, but may be changed to 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 This service discovery method only supports basic DNS A, AAAA, MX and SRV address referenced in the endpointslice object one target is discovered. Discover Packages github.com/prometheus/prometheus config config package Version: v0.42. Use the metric_relabel_configs section to filter metrics after scraping. 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 . Publishing the application's Docker image to a containe via the MADS v1 (Monitoring Assignment Discovery Service) xDS API, and will create a target for each proxy Much of the content here also applies to Grafana Agent users. To filter in more metrics for any default targets, edit the settings under default-targets-metrics-keep-list for the corresponding job you'd like to change. After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. in the configuration file), which can also be changed using relabeling. IONOS Cloud API. It reads a set of files containing a list of zero or more This documentation is open-source. I'm also loathe to fork it and have to maintain in parallel with upstream, I have neither the time nor the karma. The __param_ See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. - ip-192-168-64-29.multipass:9100 Only alphanumeric characters are allowed. The ingress role discovers a target for each path of each ingress. is not well-formed, the changes will not be applied. The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. There is a small demo of how to use for a practical example on how to set up Uyuni Prometheus configuration. This relabeling is applied after external labels. Serverset data must be in the JSON format, the Thrift format is not currently supported. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail The endpoint is queried periodically at the specified refresh interval. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . through the __alerts_path__ label. for a detailed example of configuring Prometheus with PuppetDB. 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 service is created using the port parameter defined in the SD configuration. kube-state-metricsAPI ServerDeploymentNodePodkube-state-metricsmetricsPrometheus . This guide expects some familiarity with regular expressions. A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. One use for this is ensuring a HA pair of Prometheus servers with different my/path/tg_*.json. It has the same configuration format and actions as target relabeling. which automates the Prometheus setup on top of Kubernetes. Add a new label called example_label with value example_value to every metric of the job. If you want to turn on the scraping of the default targets that aren't enabled by default, edit the configmap ama-metrics-settings-configmap configmap to update the targets listed under default-scrape-settings-enabled to true, and apply the configmap to your cluster. Short story taking place on a toroidal planet or moon involving flying. Prometheusrelabel config sell prometheus Prometheus relabel config 1. scrapelabel node_exporternode_cpucpurelabel config 2. action=replace If a service has no published ports, a target per address one target is discovered per port. Marathon SD configurations allow retrieving scrape targets using the So now that we understand what the input is for the various relabel_config rules, how do we create one? and exposes their ports as targets. Python Flask Forms with Jinja Templating , Copyright 2023 - Ruan - 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. Write relabeling is applied after external labels. It does so by replacing the labels for scraped data by regexes with relabel_configs. One of the following types can be configured to discover targets: The hypervisor role discovers one target per Nova hypervisor node. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA Sign up for free now! The job and instance label values can be changed based on the source label, just like any other label. in the configuration file. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. Prometheus relabel configs are notoriously badly documented, so here's how to do something simple that I couldn't find documented anywhere: How to add a label to all metrics coming from a specific scrape target. After scraping these endpoints, Prometheus applies the metric_relabel_configs section, which drops all metrics whose metric name matches the specified regex. To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. 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 relabeling occurs after target selection. metric_relabel_configs offers one way around that. the target and vary between mechanisms. See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from Each unique combination of key-value label pairs is stored as a new time series in Prometheus, so labels are crucial for understanding the datas cardinality and unbounded sets of values should be avoided as labels. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . entities and provide advanced modifications to the used API path, which is exposed URL from which the target was extracted. instances, as well as 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. 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 The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. to the remote endpoint. If a container has no specified ports, Scrape node metrics without any extra scrape config. To learn more about remote_write, please see remote_write from the official Prometheus docs. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? Marathon REST API. Downloads. 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). for a practical example on how to set up your Marathon app and your Prometheus The cluster label appended to every time series scraped will use the last part of the full AKS cluster's ARM resourceID. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or Prometheus fetches an access token from the specified endpoint with This will also reload any configured rule files. Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. 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. Brackets indicate that a parameter is optional. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. 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. File-based service discovery provides a more generic way to configure static targets changed with relabeling, as demonstrated in the Prometheus vultr-sd sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). 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. Prometheus will periodically check the REST endpoint and create a target for every discovered server. To un-anchor the regex, use .*.*. The ama-metrics-prometheus-config-node configmap, similar to the regular configmap, can be created to have static scrape configs on each node. this functionality. Prometheus Monitoring subreddit. - Key: PrometheusScrape, Value: Enabled s. Alert Relabeling relabeling Prometheus Relabel 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]. 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. stored in Zookeeper. All rights reserved. Triton SD configurations allow retrieving A tls_config allows configuring TLS connections. 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. A blog on monitoring, scale and operational Sanity. 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 redis we use targets like described in, Relabel instance to hostname in Prometheus, groups.google.com/forum/#!topic/prometheus-developers/, github.com/oliver006/redis_exporter/issues/623, https://stackoverflow.com/a/64623786/2043385, How Intuit democratizes AI development across teams through reusability. PuppetDB resources. 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. port of a container, a single target is generated. will periodically check the REST endpoint for currently running tasks and Prometheus instance it is running on should have at least read-only permissions to the configuration. The labelkeep and labeldrop actions allow for filtering the label set itself. Metric I'm working on file-based service discovery from a DB dump that will be able to write these targets out. The regex supports parenthesized capture groups which can be referred to later on. Only RE2 regular expression. Which seems odd. . To learn more, please see Regular expression on Wikipedia. First attempt: In order to set the instance label to $host, one can use relabel_configs to get rid of the port of your scaping target: But the above would also overwrite labels you wanted to set e.g. 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. If the new configuration Note that adding an additional scrape . In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. In this case Prometheus would drop a metric like container_network_tcp_usage_total(. 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 I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. relabel_configs. integrations with this Default targets are scraped every 30 seconds. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. . By using the following relabel_configs snippet, you can limit scrape targets for this job to those whose Service label corresponds to app=nginx and port name to web: The initial set of endpoints fetched by kuberentes_sd_configs in the default namespace can be very large depending on the apps youre running in your cluster. See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's 2023 The Linux Foundation. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. Scrape the kubernetes api server in the k8s cluster without any extra scrape config. If were using Prometheus Kubernetes SD, our targets would temporarily expose some labels such as: Labels starting with double underscores will be removed by Prometheus after relabeling steps are applied, so we can use labelmap to preserve them by mapping them to a different name. To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. A static_config allows specifying a list of targets and a common label set To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems Each target has a meta label __meta_filepath during the The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. While could be used to limit which samples are sent. node-exporter.yaml . It is 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. Files may be provided in YAML or JSON format. As an example, consider the following two metrics. IONOS SD configurations allows retrieving scrape targets from
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