can be more efficient to use the Docker API directly which has basic support for May 29, 2017. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. The private IP address is used by default, but may be changed to the public IP their API. 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. // Config is the top-level configuration for Prometheus's config files. compute resources. It may be a factor that my environment does not have DNS A or PTR records for the nodes in question. These relabeling steps are applied before the scrape occurs and only have access to labels added by Prometheus Service Discovery. contexts. ), the OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova Relabeling and filtering at this stage modifies or drops samples before Prometheus ingests them locally and ships them to remote storage. Where may be a path ending in .json, .yml or .yaml. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. Azure SD configurations allow retrieving scrape targets from Azure VMs. in the configuration file. service is created using the port parameter defined in the SD configuration. view raw prometheus.yml hosted with by GitHub , Prometheus . this functionality. metric_relabel_configs /metricsmetric_relabel_configs 3.2.2 alertmanagers alertmanagers Prometheus alertmanagers Prometheuspushing alertmanager alertmanager target NodeLegacyHostIP, and NodeHostName. config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . Alert relabeling is applied to alerts before they are sent to the Alertmanager. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. 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 These are SmartOS zones or lx/KVM/bhyve branded zones. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. See this example Prometheus configuration file support for filtering instances. configuration file, the Prometheus linode-sd See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful it was not set during relabeling. 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). sudo systemctl restart prometheus for a practical example on how to set up your Marathon app and your Prometheus domain names which are periodically queried to discover a list of targets. A static_config allows specifying a list of targets and a common label set - Key: Environment, Value: dev. The ingress role discovers a target for each path of each ingress. Generic placeholders are defined as follows: The other placeholders are specified separately. discover scrape targets, and may optionally have the single target is generated. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. discovery mechanism. Whats the grammar of "For those whose stories they are"? relabel_configs. Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. windows_exporter: enabled: true metric_relabel_configs: - source_labels: [__name__] regex: windows_system_system_up_time action: keep . To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. Refresh the page, check Medium 's site status,. To learn more about them, please see Prometheus Monitoring Mixins. If the endpoint is backed by a pod, all 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. I used the answer to this post as a model for my request: https://stackoverflow.com/a/50357418 . Prometheus keeps all other metrics. To learn more, see our tips on writing great answers. Grafana Labs uses cookies for the normal operation of this website. To review, open the file in an editor that reveals hidden Unicode characters. Labels are sets of key-value pairs that allow us to characterize and organize whats actually being measured in a Prometheus metric. There are Mixins for Kubernetes, Consul, Jaeger, and much more. The relabeling phase is the preferred and more powerful The address with relabeling. OAuth 2.0 authentication using the client credentials grant type. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. type Config struct {GlobalConfig GlobalConfig `yaml:"global"` AlertingConfig AlertingConfig `yaml:"alerting,omitempty"` RuleFiles []string `yaml:"rule_files,omitempty"` ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"` . Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. Grafana Cloud is the easiest way to get started with metrics, logs, traces, and dashboards. Published by Brian Brazil in Posts Tags: prometheus, relabelling, service discovery Share on Blog | Training | Book | Privacy It is very useful if you monitor applications (redis, mongo, any other exporter, etc. source_labels and separator Let's start off with source_labels. 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 guide describes several techniques you can use to reduce your Prometheus metrics usage on Grafana Cloud. It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. filtering nodes (using filters). 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. Furthermore, only Endpoints that have https-metrics as a defined port name are kept. To view all available command-line flags, run ./prometheus -h. Prometheus can reload its configuration at runtime. 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. metrics without this label. 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. The file is written in YAML format, The job and instance label values can be changed based on the source label, just like any other label. Prometheus K8SYaml K8S So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. address defaults to the host_ip attribute of the hypervisor. The regex is Note that the IP number and port used to scrape the targets is assembled as You can either create this configmap or edit an existing one. relabeling: Kubernetes SD configurations allow retrieving scrape targets from This An additional scrape config uses regex evaluation to find matching services en masse, and targets a set of services based on label, annotation, namespace, or name. Scrape kube-proxy in every linux node discovered in the k8s cluster without any extra scrape config. The last path segment In this case Prometheus would drop a metric like container_network_tcp_usage_total(. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml will periodically check the REST endpoint and The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd Brackets indicate that a parameter is optional. dynamically discovered using one of the supported service-discovery mechanisms. 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. The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. Tags: prometheus, relabelling. . Using the __meta_kubernetes_service_label_app label filter, endpoints whose corresponding services do not have the app=nginx label will be dropped by this scrape job. changed with relabeling, as demonstrated in the Prometheus vultr-sd Any other characters else will be replaced with _. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. created using the port parameter defined in the SD configuration. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. This SD discovers "monitoring assignments" based on Kuma Dataplane Proxies, 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. Finally, this configures authentication credentials and the remote_write queue. Using a standard prometheus config to scrape two targets: How do I align things in the following tabular environment? Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. Since weve used default regex, replacement, action, and separator values here, they can be omitted for brevity. PrometheusGrafana. For now, Prometheus Operator adds following labels automatically: endpoint, instance, namespace, pod, and service. The global configuration specifies parameters that are valid in all other configuration instances it can be more efficient to use the EC2 API directly which has prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 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. Service API. These begin with two underscores and are removed after all relabeling steps are applied; that means they will not be available unless we explicitly configure them to. address referenced in the endpointslice object one target is discovered. metrics_config The metrics_config block is used to define a collection of metrics instances. engine. After changing the file, the prometheus service will need to be restarted to pickup the changes. Posted by Ruan Once Prometheus is running, you can use PromQL queries to see how the metrics are evolving over time, such as rate (node_cpu_seconds_total [1m]) to observe CPU usage: While the node exporter does a great job of producing machine-level metrics on Unix systems, it's not going to help you expose metrics for all of your other third-party applications. Which seems odd. my/path/tg_*.json. Now what can we do with those building blocks? In many cases, heres where internal labels come into play. The Linux Foundation has registered trademarks and uses trademarks. 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. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. locations, amount of data to keep on disk and in memory, etc. valid JSON. Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. job. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. GCE SD configurations allow retrieving scrape targets from GCP GCE instances. First off, the relabel_configs key can be found as part of a scrape job definition. could be used to limit which samples are sent. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. relabeling phase. available as a label (see below). Note that adding an additional scrape . anchored on both ends. When we configured Prometheus to run as a service, we specified the path of /etc/prometheus/prometheus.yml. configuration file. The HAProxy metrics have been discovered by Prometheus. Lets start off with source_labels. Please help improve it by filing issues or pull requests. But what about metrics with no labels? Sorry, an error occurred. This is often resolved by using metric_relabel_configs instead (the reverse has also happened, but it's far less common). This service discovery method only supports basic DNS A, AAAA, MX and SRV After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. 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. Sorry, an error occurred. where should i use this in prometheus? configuration. Relabeling is a powerful tool to dynamically rewrite the label set of a target before The private IP address is used by default, but may be changed to 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. I have suggested calling it target_relabel_configs to differentiate it from metric_relabel_configs. Hetzner Cloud API and In your case please just include the list items where: Another answer is to using some /etc/hosts or local dns (Maybe dnsmasq) or sth like Service Discovery (by Consul or file_sd) and then remove ports like this: group_left unfortunately is more of a limited workaround than a solution. The replace action is most useful when you combine it with other fields. Metric The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. This SD discovers resources and will create a target for each resource returned ), but not system components (kubelet, node-exporter, kube-scheduler, .,) system components do not need most of the labels (endpoint . One use for this is ensuring a HA pair of Prometheus servers with different Prometheus is configured via command-line flags and a configuration file. 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. 1Prometheus. Why do academics stay as adjuncts for years rather than move around? To learn more, please see Regular expression on Wikipedia. rev2023.3.3.43278. way to filter targets based on arbitrary labels. interval and timeout. The __address__ label is set to the : address of the target. - ip-192-168-64-29.multipass:9100 relabeling does not apply to automatically generated timeseries such as up. This configuration does not impact any configuration set in metric_relabel_configs or relabel_configs. in the configuration file), which can also be changed using relabeling. Remote development environments that secure your source code and sensitive data To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. create a target group for every app that has at least one healthy task. You can extract a samples metric name using the __name__ meta-label. The __* labels are dropped after discovering the targets. Sign up for free now! Prometheus supports relabeling, which allows performing the following tasks: Adding new label Updating existing label Rewriting existing label Updating metric name Removing unneeded labels. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. are published with mode=host. The default regex value is (. One is for the standard Prometheus configurations as documented in <scrape_config> in the Prometheus documentation. A tls_config allows configuring TLS connections. which automates the Prometheus setup on top of Kubernetes. .). A consists of seven fields. Monitoring Docker container metrics using cAdvisor, Use file-based service discovery to discover scrape targets, Understanding and using the multi-target exporter pattern, Monitoring Linux host metrics with the Node Exporter, the Prometheus digitalocean-sd service account and place the credential file in one of the expected locations. IONOS Cloud API. 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. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. This guide expects some familiarity with regular expressions. Blog | Training | Book | Privacy, relabel_configs vs metric_relabel_configs. It fetches targets from an HTTP endpoint containing a list of zero or more Making statements based on opinion; back them up with references or personal experience. For a cluster with a large number of nodes and pods and a large volume of metrics to scrape, some of the applicable custom scrape targets can be off-loaded from the single ama-metrics replicaset pod to the ama-metrics daemonset pod. This SD discovers "containers" and will create a target for each network IP and port the container is configured to expose. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. So now that we understand what the input is for the various relabel_config rules, how do we create one? defined by the scheme described below. It is configuration. it gets scraped. - Key: Name, Value: pdn-server-1 Finally, the modulus field expects a positive integer. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. s. The scrape intervals have to be set by customer in the correct format specified here, else the default value of 30 seconds will be applied to the corresponding targets. Of course, we can do the opposite and only keep a specific set of labels and drop everything else. The nodes role is used to discover Swarm nodes. May 30th, 2022 3:01 am integrations with this In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. For each declared So without further ado, lets get into it! So if you want to say scrape this type of machine but not that one, use relabel_configs. Grafana Labs uses cookies for the normal operation of this website. Please find below an example from other exporter (blackbox), but same logic applies for node exporter as well. instance it is running on should have at least read-only permissions to the s. Why does Mister Mxyzptlk need to have a weakness in the comics? Prometheus Monitoring subreddit. - the incident has nothing to do with me; can I use this this way? * action: drop metric_relabel_configs We've looked at the full Life of a Label. Omitted fields take on their default value, so these steps will usually be shorter. 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.. 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. As we saw before, the following block will set the env label to the replacement provided, so {env="production"} will be added to the labelset. Going back to our extracted values, and a block like this. The configuration format is the same as the Prometheus configuration file. . The target address defaults to the first existing address of the Kubernetes *) regex captures the entire label value, replacement references this capture group, $1, when setting the new target_label. For each published port of a service, a Heres an example. 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. You can place all the logic in the targets section using some separator - I used @ and then process it with regex. metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. It does so by replacing the labels for scraped data by regexes with relabel_configs. Aurora. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The new label will also show up in the cluster parameter dropdown in the Grafana dashboards instead of the default one. This service discovery uses the public IPv4 address by default, by that can be and serves as an interface to plug in custom service discovery mechanisms. 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. Vultr SD configurations allow retrieving scrape targets from Vultr. Its value is set to the The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. If the relabel action results in a value being written to some label, target_label defines to which label the replacement should be written. Each target has a meta label __meta_filepath during the A configuration reload is triggered by sending a SIGHUP to the Prometheus process or prometheus prometheus server Pull Push . 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. through the __alerts_path__ label. integrations Relabelling. for them. I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below.
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