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Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. Lets start off with source_labels. Prometheus is configured via command-line flags and a configuration file. The Linux Foundation has registered trademarks and uses trademarks. The regex field expects a valid RE2 regular expression and is used to match the extracted value from the combination of the source_label and separator fields. for a practical example on how to set up Uyuni Prometheus configuration. Metric relabel configs are applied after scraping and before ingestion. The target tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. (relabel_config) prometheus . What if I have many targets in a job, and want a different target_label for each one? This piece of remote_write configuration sets the remote endpoint to which Prometheus will push samples. directly which has basic support for filtering nodes (currently by node So ultimately {__tmp=5} would be appended to the metrics label set. Below are examples of how to do so. Please help improve it by filing issues or pull requests. The target address defaults to the first existing address of the Kubernetes Marathon SD configurations allow retrieving scrape targets using the The second relabeling rule adds {__keep="yes"} label to metrics with empty `mountpoint` label, e.g. create a target group for every app that has at least one healthy task. prometheus prometheus server Pull Push . One use for this is to exclude time series that are too expensive to ingest. Prometheus also provides some internal labels for us. 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. . Each target has a meta label __meta_url during the See below for the configuration options for OpenStack discovery: OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS using To subscribe to this RSS feed, copy and paste this URL into your RSS reader. See below for the configuration options for PuppetDB discovery: See this example Prometheus 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. The __param_ for a practical example on how to set up your Marathon app and your Prometheus 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. Use the metric_relabel_configs section to filter metrics after scraping. Brackets indicate that a parameter is optional. 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 containers (using filters). Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. WindowsyamlLinux. write_relabel_configs is relabeling applied to samples before sending them Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. For all targets discovered directly from the endpoints list (those not additionally inferred A static config has a list of static targets and any extra labels to add to them. When metrics come from another system they often don't have labels. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? create a target for every app instance. 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. Mixins are a set of preconfigured dashboards and alerts. We have a generous free forever tier and plans for every use case. IONOS Cloud API. Use Grafana to turn failure into resilience. rev2023.3.3.43278. But what about metrics with no labels? configuration file defines everything related to scraping jobs and their Curated sets of important metrics can be found in Mixins. If a container has no specified ports, The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression. the given client access and secret keys. The global configuration specifies parameters that are valid in all other configuration Eureka REST API. Relabeling is a powerful tool to dynamically rewrite the label set of a target before So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. 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. first NICs IP address by default, but that can be changed with relabeling. With a (partial) config that looks like this, I was able to achieve the desired result. will periodically check the REST endpoint and The Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. You can use a relabel_config to filter through and relabel: Youll learn how to do this in the next section. relabeling is applied after external labels. Relabeling relabeling Prometheus Relabel 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. Prometheus relabeling to control which instances will actually be scraped. Metric users with thousands of services it can be more efficient to use the Consul API defined by the scheme described below. See below for the configuration options for GCE discovery: Credentials are discovered by the Google Cloud SDK default client by looking for a practical example on how to set up your Eureka app and your Prometheus s. The difference between the phonemes /p/ and /b/ in Japanese. Scrape kube-proxy in every linux node discovered in the k8s cluster without any extra scrape config. To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. will periodically check the REST endpoint for currently running tasks and Published by Brian Brazil in Posts Tags: prometheus, relabelling, service discovery Share on Blog | Training | Book | Privacy 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. relabeling phase. I just came across this problem and the solution is to use a group_left to resolve this problem. Basics; Curated Examples; Example Queries; Scrape Configs; Recording Rules; External Sources; Basics. 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. 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. Why are physically impossible and logically impossible concepts considered separate in terms of probability? 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. target is generated. For more information, check out our documentation and read more in the Prometheus documentation. 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. Now what can we do with those building blocks? The resource address is the certname of the resource and can be changed during NodeLegacyHostIP, and NodeHostName. In many cases, heres where internal labels come into play. For readability its usually best to explicitly define a relabel_config. If it finds the instance_ip label, it renames this label to host_ip. Prometheus will periodically check the REST endpoint and create a target for every discovered server. The regex is The following meta labels are available on targets during relabeling: See below for the configuration options for Azure discovery: Consul SD configurations allow retrieving scrape targets from Consul's PrometheusGrafana. Labels starting with __ will be removed from the label set after target The ama-metrics-prometheus-config-node configmap, similar to the regular configmap, can be created to have static scrape configs on each node. it was not set during relabeling. 5.6K subscribers in the PrometheusMonitoring community. It fetches targets from an HTTP endpoint containing a list of zero or more 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. Additional config for this answer: These relabeling steps are applied before the scrape occurs and only have access to labels added by Prometheus Service Discovery. For example, if the resource ID is /subscriptions/00000000-0000-0000-0000-000000000000/resourcegroups/rg-name/providers/Microsoft.ContainerService/managedClusters/clustername, the cluster label is clustername. 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. anchored on both ends. 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 Monitoring subreddit. node object in the address type order of NodeInternalIP, NodeExternalIP, <__meta_consul_address>:<__meta_consul_service_port>. They are set by the service discovery mechanism that provided Additional labels prefixed with __meta_ may be available during the Hetzner Cloud API and Extracting labels from legacy metric names. Prometheus fetches an access token from the specified endpoint with - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . which automates the Prometheus setup on top of Kubernetes. changed with relabeling, as demonstrated in the Prometheus linode-sd A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. 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. Of course, we can do the opposite and only keep a specific set of labels and drop everything else. This will cut your active series count in half. The extracted string would then be set written out to the target_label and might result in {address="podname:8080}. changed with relabeling, as demonstrated in the Prometheus digitalocean-sd This is often useful when fetching sets of targets using a service discovery mechanism like kubernetes_sd_configs, or Kubernetes service discovery. Finally, the modulus field expects a positive integer. If not all input to a subsequent relabeling step), use the __tmp label name prefix. Find centralized, trusted content and collaborate around the technologies you use most. For users with thousands of tasks it I have installed Prometheus on the same server where my Django app is running. configuration. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. created using the port parameter defined in the SD configuration. The private IP address is used by default, but may be changed to 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. Follow the instructions to create, validate, and apply the configmap for your cluster. instances. Since the (. type Config struct {GlobalConfig GlobalConfig `yaml:"global"` AlertingConfig AlertingConfig `yaml:"alerting,omitempty"` RuleFiles []string `yaml:"rule_files,omitempty"` ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"` . Why does Mister Mxyzptlk need to have a weakness in the comics? Does Counterspell prevent from any further spells being cast on a given turn? I've been trying in vai for a month to find a coherent explanation of group_left, and expressions aren't labels. So let's shine some light on these two configuration options. Vultr SD configurations allow retrieving scrape targets from Vultr. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. 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). filtering nodes (using filters). Prometheus Three different configmaps can be configured to change the default settings of the metrics addon: The ama-metrics-settings-configmap can be downloaded, edited, and applied to the cluster to customize the out-of-the-box features of the metrics addon. metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. changes resulting in well-formed target groups are applied. Prometheus relabel_configs 4. and exposes their ports as targets. refresh interval. Sign up for free now! this functionality. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml To do this, use a relabel_config object in the write_relabel_configs subsection of the remote_write section of your Prometheus config. . for a detailed example of configuring Prometheus for Kubernetes. 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 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. The private IP address is used by default, but may be changed to - Key: Environment, Value: dev. can be more efficient to use the Docker API directly which has basic support for For non-list parameters the So if you want to say scrape this type of machine but not that one, use relabel_configs. 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. So without further ado, lets get into it! So now that we understand what the input is for the various relabel_config rules, how do we create one? This may be changed with relabeling. Azure SD configurations allow retrieving scrape targets from Azure VMs. The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. This service discovery uses the main IPv4 address by default, which that be 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. configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd Going back to our extracted values, and a block like this. In this guide, weve presented an overview of Prometheuss powerful and flexible relabel_config feature and how you can leverage it to control and reduce your local and Grafana Cloud Prometheus usage. A scrape_config section specifies a set of targets and parameters describing how If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. Triton SD configurations allow retrieving to Prometheus Users Thank you Simonm This is helpful, however, i found that under prometheus v2.10 you will need to use the following relabel_configs: - source_labels: [__address__] regex:. is it query? 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. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. Open positions, Check out the open source projects we support 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. Aurora. For OVHcloud's public cloud instances you can use the openstacksdconfig. 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. 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. To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. Serverset data must be in the JSON format, the Thrift format is not currently supported. Nomad SD configurations allow retrieving scrape targets from Nomad's If the new configuration 1Prometheus. This is most commonly used for sharding multiple targets across a fleet of Prometheus instances. This guide expects some familiarity with regular expressions. https://stackoverflow.com/a/64623786/2043385. can be more efficient to use the Swarm API directly which has basic support for While One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. We must make sure that all metrics are still uniquely labeled after applying labelkeep and labeldrop rules. [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config and serves as an interface to plug in custom service discovery mechanisms. My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. What sort of strategies would a medieval military use against a fantasy giant? relabeling phase. Note that exemplar storage is still considered experimental and must be enabled via --enable-feature=exemplar-storage. For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. 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). 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. label is set to the job_name value of the respective scrape configuration. job. changed with relabeling, as demonstrated in the Prometheus scaleway-sd Additionally, relabel_configs allow advanced modifications to any Tags: prometheus, relabelling. discovery endpoints. . for a detailed example of configuring Prometheus for Docker Engine. Avoid downtime. Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version The label will end with '.pod_node_name'. After relabeling, the instance label is set to the value of __address__ by default if Making statements based on opinion; back them up with references or personal experience. The hashmod action provides a mechanism for horizontally scaling Prometheus. Changes to all defined files are detected via disk watches relabeling is completed. Why do academics stay as adjuncts for years rather than move around? Sorry, an error occurred. Multiple relabeling steps can be configured per scrape configuration. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. See below for the configuration options for Triton discovery: Eureka SD configurations allow retrieving scrape targets using the One use for this is ensuring a HA pair of Prometheus servers with different This feature allows you to filter through series labels using regular expressions and keep or drop those that match. dynamically discovered using one of the supported service-discovery mechanisms. It also provides parameters to configure how to The terminal should return the message "Server is ready to receive web requests." How do I align things in the following tabular environment? It expects an array of one or more label names, which are used to select the respective label values. PuppetDB resources. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. could be used to limit which samples are sent. Grafana Labs uses cookies for the normal operation of this website. OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from filepath from which the target was extracted. Note: By signing up, you agree to be emailed related product-level information. 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. 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]. 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. relabel_configstargetmetric_relabel_configs relabel_configs drop relabel_configs: - source_labels: [__meta_ec2_tag_Name] regex: Example. configuration. configuration file, the Prometheus linode-sd may contain a single * that matches any character sequence, e.g. Below are examples showing ways to use relabel_configs. 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. Posted by Ruan In this case Prometheus would drop a metric like container_network_tcp_usage_total(. This solution stores data at scrape-time with the desired labels, no need for funny PromQL queries or hardcoded hacks. For The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. Scrape node metrics without any extra scrape config. 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. You can, for example, only keep specific metric names. Parameters that arent explicitly set will be filled in using default values. For users with thousands of You can't relabel with a nonexistent value in the request, you are limited to the different parameters that you gave to Prometheus or those that exists in the module use for the request (gcp,aws.). 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. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage.