prometheus relabel_configs vs metric_relabel_configs prometheus relabel_configs vs metric_relabel_configs

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. integrations with this . Relabeling is a powerful tool to dynamically rewrite the label set of a target before Consul setups, the relevant address is in __meta_consul_service_address. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. For each published port of a service, a 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. Only alphanumeric characters are allowed. Prometheus K8SYaml K8S Using a standard prometheus config to scrape two targets: Making statements based on opinion; back them up with references or personal experience. 1Prometheus. See this example Prometheus configuration file So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. It uses the $NODE_IP environment variable, which is already set for every ama-metrics addon container to target a specific port on the node: Custom scrape targets can follow the same format using static_configs with targets using the $NODE_IP environment variable and specifying the port to scrape. The file is written in YAML format, Using this feature, you can store metrics locally but prevent them from shipping to Grafana Cloud. Hope you learned a thing or two about relabeling rules and that youre more comfortable with using them. This is often useful when fetching sets of targets using a service discovery mechanism like kubernetes_sd_configs, or Kubernetes service discovery. Blog | Training | Book | Privacy, relabel_configs vs metric_relabel_configs. To learn more about the general format for a relabel_config block, please see relabel_config from the Prometheus docs. The following snippet of configuration demonstrates an allowlisting approach, where the specified metrics are shipped to remote storage, and all others dropped. still uniquely labeled once the labels are removed. it was not set during relabeling. 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. Write relabeling is applied after external labels. Enter relabel_configs, a powerful way to change metric labels dynamically. The purpose of this post is to explain the value of Prometheus relabel_config block, the different places where it can be found, and its usefulness in taming Prometheus metrics. - Key: PrometheusScrape, Value: Enabled URL from which the target was extracted. Which is frowned on by upstream as an "antipattern" because apparently there is an expectation that instance be the only label whose value is unique across all metrics in the job. 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. are set to the scheme and metrics path of the target respectively. One is for the standard Prometheus configurations as documented in <scrape_config> in the Prometheus documentation. input to a subsequent relabeling step), use the __tmp label name prefix. 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. Zookeeper. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The address will be set to the host specified in the ingress spec. by the API. If the endpoint is backed by a pod, all vmagent can accept metrics in various popular data ingestion protocols, apply relabeling to the accepted metrics (for example, change metric names/labels or drop unneeded metrics) and then forward the relabeled metrics to other remote storage systems, which support Prometheus remote_write protocol (including other vmagent instances). So now that we understand what the input is for the various relabel_config rules, how do we create one? 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. 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. Brackets indicate that a parameter is optional. It does so by replacing the labels for scraped data by regexes with relabel_configs. Prometheus is configured through a single YAML file called prometheus.yml. Scrape node metrics without any extra scrape config. and exposes their ports as targets. The private IP address is used by default, but may be changed to the public IP However, in some Additional helpful documentation, links, and articles: How to set up and visualize synthetic monitoring at scale with Grafana Cloud, Using Grafana Cloud to drive manufacturing plant efficiency. Let's focus on one of the most common confusions around relabelling. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA This is often resolved by using metric_relabel_configs instead (the reverse has also happened, but it's far less common). The second relabeling rule adds {__keep="yes"} label to metrics with empty `mountpoint` label, e.g. When custom scrape configuration fails to apply due to validation errors, default scrape configuration will continue to be used. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. for a practical example on how to set up your Marathon app and your Prometheus 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. Our answer exist inside the node_uname_info metric which contains the nodename value. metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. 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. For non-list parameters the Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. Prometheus queries: How to give a default label when it is missing? Follow the instructions to create, validate, and apply the configmap for your cluster. for a detailed example of configuring Prometheus for Kubernetes. for a detailed example of configuring Prometheus with PuppetDB. Reload Prometheus and check out the targets page: Great! To allowlist metrics and labels, you should identify a set of core important metrics and labels that youd like to keep. 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. to the remote endpoint. The label will end with '.pod_node_name'. If a service has no published ports, a target per - ip-192-168-64-30.multipass:9100. external labels send identical alerts. The HTTP header Content-Type must be application/json, and the body must be 5.6K subscribers in the PrometheusMonitoring community. In addition, the instance label for the node will be set to the node name 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 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. If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. I'm working on file-based service discovery from a DB dump that will be able to write these targets out. directly which has basic support for filtering nodes (currently by node The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. for them. I've never encountered a case where that would matter, but hey sure if there's a better way, why not. has the same configuration format and actions as target relabeling. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. Note that exemplar storage is still considered experimental and must be enabled via --enable-feature=exemplar-storage. Hetzner Cloud API and We drop all ports that arent named web. Nerve SD configurations allow retrieving scrape targets from AirBnB's Nerve which are stored in Linode APIv4. configuration file. The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. IONOS SD configurations allows retrieving scrape targets from This service discovery uses the metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. I just came across this problem and the solution is to use a group_left to resolve this problem. .). create a target group for every app that has at least one healthy task. The last relabeling rule drops all the metrics without {__keep="yes"} label. For each endpoint available as a label (see below). To enable denylisting in Prometheus, use the drop and labeldrop actions with any relabeling configuration. The pod role discovers all pods and exposes their containers as targets. 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. following meta labels are available on all targets during The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. For each published port of a task, a single relabeling: Kubernetes SD configurations allow retrieving scrape targets from ec2:DescribeAvailabilityZones permission if you want the availability zone ID The __address__ label is set to the : address of the target. You can either create this configmap or edit an existing one. The endpointslice role discovers targets from existing endpointslices. address with relabeling. which automates the Prometheus setup on top of Kubernetes. Each target has a meta label __meta_url during the You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. from underlying pods), the following labels are attached: If the endpoints belong to a service, all labels of the, For all targets backed by a pod, all labels of the. instances, as well as Additionally, relabel_configs allow advanced modifications to any 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. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd The account must be a Triton operator and is currently required to own at least one container. node-exporter.yaml . The resource address is the certname of the resource and can be changed during - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . 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. Whats the grammar of "For those whose stories they are"? This configuration does not impact any configuration set in metric_relabel_configs or relabel_configs. 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. The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. 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 relabeling Prometheus Relabel Additional labels prefixed with __meta_ may be available during the So let's shine some light on these two configuration options. In this scenario, on my EC2 instances I have 3 tags: The following relabeling would remove all {subsystem=""} labels but keep other labels intact. Not the answer you're looking for? My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. The replace action is most useful when you combine it with other fields. Eureka REST API. The labelmap action is used to map one or more label pairs to different label names. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. rev2023.3.3.43278. 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. Lets start off with source_labels. changed with relabeling, as demonstrated in the Prometheus hetzner-sd Nomad SD configurations allow retrieving scrape targets from Nomad's metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail The node-exporter config below is one of the default targets for the daemonset pods. 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. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version There is a list of Asking for help, clarification, or responding to other answers. To specify which configuration file to load, use the --config.file flag. The last path segment Why does Mister Mxyzptlk need to have a weakness in the comics? node_uname_info{nodename} -> instance -- I get a syntax error at startup. Scrape kubelet in every node in the k8s cluster without any extra scrape config. I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. This service discovery uses the public IPv4 address by default, by that can be Consider the following metric and relabeling step. configuration file. 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. * action: drop metric_relabel_configs In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. The result of the concatenation is the string node-42 and the MD5 of the string modulus 8 is 5. Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. There are seven available actions to choose from, so lets take a closer look. <__meta_consul_address>:<__meta_consul_service_port>. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? Marathon SD configurations allow retrieving scrape targets using the Yes, I know, trust me I don't like either but it's out of my control. discovery mechanism. To learn more, see our tips on writing great answers. service is created using the port parameter defined in the SD configuration. in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the The reason is that relabeling can be applied in different parts of a metrics lifecycle from selecting which of the available targets wed like to scrape, to sieving what wed like to store in Prometheus time series database and what to send over to some remote storage. Files may be provided in YAML or JSON format. But still that shouldn't matter, I dunno why node_exporter isn't supplying any instance label at all since it does find the hostname for the info metric (where it doesn't do me any good). configuration file. relabeling phase. instance it is running on should have at least read-only permissions to the Python Flask Forms with Jinja Templating , Copyright 2023 - Ruan - It is the canonical way to specify static targets in a scrape 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. Service API. relabeling is completed. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. 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. Prometheus Monitoring subreddit. May 29, 2017. relabel_configs. If the new configuration Targets discovered using kubernetes_sd_configs will each have different __meta_* labels depending on what role is specified. To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. The IAM credentials used must have the ec2:DescribeInstances permission to node object in the address type order of NodeInternalIP, NodeExternalIP, metric_relabel_configsmetric . Note that the IP number and port used to scrape the targets is assembled as Relabeling 4.1 . 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. If shipping samples to Grafana Cloud, you also have the option of persisting samples locally, but preventing shipping to remote storage. For each declared configuration file defines everything related to scraping jobs and their The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. Published by Brian Brazil in Posts. See below for the configuration options for GCE discovery: Credentials are discovered by the Google Cloud SDK default client by looking for a detailed example of configuring Prometheus for Docker Engine. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems changed with relabeling, as demonstrated in the Prometheus scaleway-sd So ultimately {__tmp=5} would be appended to the metrics label set. This will cut your active series count in half. through the __alerts_path__ label. Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. WindowsyamlLinux. Now what can we do with those building blocks? service port. metrics without this label. 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 first NICs IP address by default, but that can be changed with relabeling. 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. See below for the configuration options for Docker Swarm discovery: The relabeling phase is the preferred and more powerful . with this feature. . interface. instances. metric_relabel_configs relabel_configsreplace Prometheus K8S . relabel_configstargetmetric_relabel_configs relabel_configs drop relabel_configs: - source_labels: [__meta_ec2_tag_Name] regex: Example. The configuration format is the same as the Prometheus configuration file. entities and provide advanced modifications to the used API path, which is exposed If not all 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. determines the relabeling action to take: Care must be taken with labeldrop and labelkeep to ensure that metrics are for a practical example on how to set up your Eureka app and your Prometheus with kube-prometheus-stack) then you can specify additional scrape config jobs to monitor your custom services. Mixins are a set of preconfigured dashboards and alerts. compute resources. PuppetDB resources. as retrieved from the API server. You can also manipulate, transform, and rename series labels using relabel_config. A scrape_config section specifies a set of targets and parameters describing how 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. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Since weve used default regex, replacement, action, and separator values here, they can be omitted for brevity. stored in Zookeeper. Each pod of the daemonset will take the config, scrape the metrics, and send them for that node. The result can then be matched against using a regex, and an action operation can be performed if a match occurs. GCE SD configurations allow retrieving scrape targets from GCP GCE instances. Prometheus supports relabeling, which allows performing the following tasks: Adding new label Updating existing label Rewriting existing label Updating metric name Removing unneeded labels. way to filter services or nodes for a service based on arbitrary labels. Use the metric_relabel_configs section to filter metrics after scraping. 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. Alert Endpoints are limited to the kube-system namespace. valid JSON. 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. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. Note that adding an additional scrape . Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. 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. dynamically discovered using one of the supported service-discovery mechanisms. This will also reload any configured rule files. The cluster label appended to every time series scraped will use the last part of the full AKS cluster's ARM resourceID. You can, for example, only keep specific metric names. . I have suggested calling it target_relabel_configs to differentiate it from metric_relabel_configs. way to filter containers. Kuma SD configurations allow retrieving scrape target from the Kuma control plane. To drop a specific label, select it using source_labels and use a replacement value of "". How to use Slater Type Orbitals as a basis functions in matrix method correctly? RE2 regular expression. To further customize the default jobs to change properties such as collection frequency or labels, disable the corresponding default target by setting the configmap value for the target to false, and then apply the job using custom configmap.