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 This role uses the public IPv4 address by default. can be more efficient to use the Docker API directly which has basic support for In this scenario, on my EC2 instances I have 3 tags: changed with relabeling, as demonstrated in the Prometheus vultr-sd For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. Alert relabeling is applied to alerts before they are sent to the Alertmanager. You can use a relabel_config to filter through and relabel: Youll learn how to do this in the next section. May 29, 2017. # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus 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. via Uyuni API. I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. To learn how to do this, please see Sending data from multiple high-availability Prometheus instances. Parameters that arent explicitly set will be filled in using default values. metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. 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. It has the same configuration format and actions as target relabeling. Which seems odd. Where must be unique across all scrape configurations. still uniquely labeled once the labels are removed. One use for this is ensuring a HA pair of Prometheus servers with different Weve come a long way, but were finally getting somewhere. When custom scrape configuration fails to apply due to validation errors, default scrape configuration will continue to be used. Note: By signing up, you agree to be emailed related product-level information. Nerve SD configurations allow retrieving scrape targets from AirBnB's Nerve which are stored in PrometheusGrafana. I have suggested calling it target_relabel_configs to differentiate it from metric_relabel_configs. my/path/tg_*.json. This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. This SD discovers "monitoring assignments" based on Kuma Dataplane Proxies, Hope you learned a thing or two about relabeling rules and that youre more comfortable with using them. Add a new label called example_label with value example_value to every metric of the job. Relabeling and filtering at this stage modifies or drops samples before Prometheus ingests them locally and ships them to remote storage. So if you want to say scrape this type of machine but not that one, use relabel_configs. Consider the following metric and relabeling step. 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 It expects an array of one or more label names, which are used to select the respective label values. 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. Thanks for contributing an answer to Stack Overflow! value is set to the specified default. OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova Otherwise the custom configuration will fail validation and won't be applied. node_uname_info{nodename} -> instance -- I get a syntax error at startup. instances, as well as changed with relabeling, as demonstrated in the Prometheus digitalocean-sd Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. Read more. Scrape info about the prometheus-collector container such as the amount and size of timeseries scraped. Aurora. interface. Heres an example. The relabeling phase is the preferred and more powerful DNS servers to be contacted are read from /etc/resolv.conf. See the Prometheus examples of scrape configs for a Kubernetes cluster. it gets scraped. service is created using the port parameter defined in the SD configuration. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For all targets discovered directly from the endpoints list (those not additionally inferred Azure SD configurations allow retrieving scrape targets from Azure VMs. may contain a single * that matches any character sequence, e.g. 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. In many cases, heres where internal labels come into play. 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. 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. 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 . 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.. instances it can be more efficient to use the EC2 API directly which has via the MADS v1 (Monitoring Assignment Discovery Service) xDS API, and will create a target for each proxy This is a quick demonstration on how to use prometheus relabel configs, when you have scenarios for when example, you want to use a part of your hostname and assign it to a prometheus label. The prometheus_sd_http_failures_total counter metric tracks the number of configuration file, the Prometheus linode-sd It may be a factor that my environment does not have DNS A or PTR records for the nodes in question. An alertmanager_config section specifies Alertmanager instances the Prometheus Reducing Prometheus metrics usage with relabeling, Common use cases for relabeling in Prometheus, The targets scrape interval (experimental), Special labels set set by the Service Discovery mechanism, Special prefix used to temporarily store label values before discarding them, When you want to ignore a subset of applications; use relabel_config, When splitting targets between multiple Prometheus servers; use relabel_config + hashmod, When you want to ignore a subset of high cardinality metrics; use metric_relabel_config, When sending different metrics to different endpoints; use write_relabel_config. The 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 filtering nodes (using filters). 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. 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. Additional labels prefixed with __meta_ may be available during the discovery endpoints. feature to replace the special __address__ label. Targets may be statically configured via the static_configs parameter or target and its labels before scraping. integrations This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. The target 1Prometheus. A static_config allows specifying a list of targets and a common label set For more information, check out our documentation and read more in the Prometheus documentation. Thats all for today! See below for the configuration options for OpenStack discovery: OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS using the public IP address with relabeling. This is often useful when fetching sets of targets using a service discovery mechanism like kubernetes_sd_configs, or Kubernetes service discovery. They are applied to the label set of each target in order of their appearance Hetzner Cloud API and For instance, if you created a secret named kube-prometheus-prometheus-alert-relabel-config and it contains a file named additional-alert-relabel-configs.yaml, use the parameters below: configuration. DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean's The __scrape_interval__ and __scrape_timeout__ labels are set to the target's The private IP address is used by default, but may be changed to the public IP configuration. Open positions, Check out the open source projects we support The endpointslice role discovers targets from existing endpointslices. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. Why does Mister Mxyzptlk need to have a weakness in the comics? Labels are sets of key-value pairs that allow us to characterize and organize whats actually being measured in a Prometheus metric. Whats the grammar of "For those whose stories they are"? and exposes their ports as targets. See the Prometheus marathon-sd configuration file The instance role discovers one target per network interface of Nova In addition, the instance label for the node will be set to the node name type Config struct {GlobalConfig GlobalConfig `yaml:"global"` AlertingConfig AlertingConfig `yaml:"alerting,omitempty"` RuleFiles []string `yaml:"rule_files,omitempty"` ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"` . This is generally useful for blackbox monitoring of an ingress. The global configuration specifies parameters that are valid in all other configuration "After the incident", I started to be more careful not to trip over things. This can be way to filter services or nodes for a service based on arbitrary labels. ), the So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. The relabel_configs section is applied at the time of target discovery and applies to each target for the job. Prometheus also provides some internal labels for us. could be used to limit which samples are sent. After scraping these endpoints, Prometheus applies the metric_relabel_configs section, which drops all metrics whose metric name matches the specified regex. Sign up for free now! 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. will periodically check the REST endpoint for currently running tasks and There is a list of For non-list parameters the The following relabeling would remove all {subsystem=""} labels but keep other labels intact. relabeling: Kubernetes SD configurations allow retrieving scrape targets from relabeling does not apply to automatically generated timeseries such as up. Triton SD configurations allow retrieving This can be used to filter metrics with high cardinality or route metrics to specific remote_write targets. Reload Prometheus and check out the targets page: Great! See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful Alert The extracted string would then be set written out to the target_label and might result in {address="podname:8080}. is not well-formed, the changes will not be applied. 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. For example, kubelet is the metric filtering setting for the default target kubelet. Recall that these metrics will still get persisted to local storage unless this relabeling configuration takes place in the metric_relabel_configs section of a scrape job. For users with thousands of tasks it is any valid Labels starting with __ will be removed from the label set after target To filter by them at the metrics level, first keep them using relabel_configs by assigning a label name and then use metric_relabel_configs to filter. Before applying these techniques, ensure that youre deduplicating any samples sent from high-availability Prometheus clusters. We have a generous free forever tier and plans for every use case. If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. 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. directly which has basic support for filtering nodes (currently by node defined by the scheme described below. 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 entities and provide advanced modifications to the used API path, which is exposed config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . Additional config for this answer: This documentation is open-source. way to filter targets based on arbitrary labels. for a practical example on how to set up your Marathon app and your Prometheus 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. The scrape config should only target a single node and shouldn't use service discovery. external labels send identical alerts. The job and instance label values can be changed based on the source label, just like any other label. 5.6K subscribers in the PrometheusMonitoring community. The endpoint is queried periodically at the specified refresh interval. changed with relabeling, as demonstrated in the Prometheus scaleway-sd action: keep. This occurs after target selection using relabel_configs. discover scrape targets, and may optionally have the - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. This relabeling occurs after target selection. address one target is discovered per port. PuppetDB resources. Also, your values need not be in single quotes. Below are examples of how to do so. See below for the configuration options for Kubernetes discovery: See this example Prometheus configuration file Enter relabel_configs, a powerful way to change metric labels dynamically. When metrics come from another system they often don't have labels. They are set by the service discovery mechanism that provided the target and vary between mechanisms. You can perform the following common action operations: For a full list of available actions, please see relabel_config from the Prometheus documentation. URL from which the target was extracted. Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. - Key: PrometheusScrape, Value: Enabled configuration file. This service discovery method only supports basic DNS A, AAAA, MX and SRV The label will end with '.pod_node_name'. So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. of your services provide Prometheus metrics, you can use a Marathon label and The private IP address is used by default, but may be changed to created using the port parameter defined in the SD configuration. If a relabeling step needs to store a label value only temporarily (as the in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the We could offer this as an alias, to allow config file transition for Prometheus 3.x. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd The resource address is the certname of the resource and can be changed during To learn more, see our tips on writing great answers. Vultr SD configurations allow retrieving scrape targets from Vultr. One of the following roles can be configured to discover targets: The services role discovers all Swarm services See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful Service API. To specify which configuration file to load, use the --config.file flag. Changes to all defined files are detected via disk watches The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. engine. relabel_configs. This set of targets consists of one or more Pods that have one or more defined ports. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. Choosing which metrics and samples to scrape, store, and ship to Grafana Cloud can seem quite daunting at first. Scrape kubelet in every node in the k8s cluster without any extra scrape config. See below for the configuration options for GCE discovery: Credentials are discovered by the Google Cloud SDK default client by looking Find centralized, trusted content and collaborate around the technologies you use most. RFC6763. The labelmap action is used to map one or more label pairs to different label names. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. the public IP address with relabeling. The difference between the phonemes /p/ and /b/ in Japanese. Connect and share knowledge within a single location that is structured and easy to search. [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? This will cut your active series count in half. stored in Zookeeper. You may wish to check out the 3rd party Prometheus Operator, If it finds the instance_ip label, it renames this label to host_ip. 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 The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. Prometheus metric_relabel_configs . metric_relabel_configs relabel_configsreplace Prometheus K8S . 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. OAuth 2.0 authentication using the client credentials grant type. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. 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 See below for the configuration options for Docker Swarm discovery: The relabeling phase is the preferred and more powerful 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 If a container has no specified ports, To drop a specific label, select it using source_labels and use a replacement value of "". To review, open the file in an editor that reveals hidden Unicode characters. https://stackoverflow.com/a/64623786/2043385. The HTTP header Content-Type must be application/json, and the body must be input to a subsequent relabeling step), use the __tmp label name prefix. Metric relabeling is applied to samples as the last step before ingestion. Relabeler allows you to visually confirm the rules implemented by a relabel config. service account and place the credential file in one of the expected locations. Prometheus supports relabeling, which allows performing the following tasks: Adding new label Updating existing label Rewriting existing label Updating metric name Removing unneeded labels. Any other characters else will be replaced with _. The labels can be used in the relabel_configs section to filter targets or replace labels for the targets. 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. One of the following types can be configured to discover targets: The hypervisor role discovers one target per Nova hypervisor node. 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. This is most commonly used for sharding multiple targets across a fleet of Prometheus instances. compute resources. The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. address with relabeling. 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. Published by Brian Brazil in Posts Tags: prometheus, relabelling, service discovery Share on Blog | Training | Book | Privacy Prometheus Relabel configs allow you to select which targets you want scraped, and what the target labels will be. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Lets start off with source_labels. 2023 The Linux Foundation. How can they help us in our day-to-day work? 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. To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. The default value of the replacement is $1, so it will match the first capture group from the regex or the entire extracted value if no regex was specified. It is the canonical way to specify static targets in a scrape This will also reload any configured rule files. 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. Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. Where may be a path ending in .json, .yml or .yaml. The last path segment This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. How can I 'join' two metrics in a Prometheus query? This SD discovers "containers" and will create a target for each network IP and port the container is configured to expose. What sort of strategies would a medieval military use against a fantasy giant? How to use Slater Type Orbitals as a basis functions in matrix method correctly? These are SmartOS zones or lx/KVM/bhyve branded zones. To allowlist metrics and labels, you should identify a set of core important metrics and labels that youd like to keep. Of course, we can do the opposite and only keep a specific set of labels and drop everything else. The target must reply with an HTTP 200 response.

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