configuration file. will periodically check the REST endpoint for currently running tasks and The __scrape_interval__ and __scrape_timeout__ labels are set to the target's instances. For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. Heres an example. One of the following roles can be configured to discover targets: The services role discovers all Swarm services ec2:DescribeAvailabilityZones permission if you want the availability zone ID File-based service discovery provides a more generic way to configure static targets metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. This may be changed with relabeling. Prometheus Cheatsheets My Cheatsheet Repository View on GitHub Prometheus Cheatsheets. Serverset SD configurations allow retrieving scrape targets from Serversets which are determines the relabeling action to take: Care must be taken with labeldrop and labelkeep to ensure that metrics are I've been trying in vai for a month to find a coherent explanation of group_left, and expressions aren't labels. ), the 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 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 Use Grafana to turn failure into resilience. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. target and its labels before scraping. This can be used to filter metrics with high cardinality or route metrics to specific remote_write targets. When we configured Prometheus to run as a service, we specified the path of /etc/prometheus/prometheus.yml. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA Whats the grammar of "For those whose stories they are"? write_relabel_configs is relabeling applied to samples before sending them One use for this is to exclude time series that are too expensive to ingest. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd Service API. domain names which are periodically queried to discover a list of targets. discovery mechanism. Of course, we can do the opposite and only keep a specific set of labels and drop everything else. You can either create this configmap or edit an existing one. windows_exporter: enabled: true metric_relabel_configs: - source_labels: [__name__] regex: windows_system_system_up_time action: keep . Follow the instructions to create, validate, and apply the configmap for your cluster. Prometheus K8SYaml K8S Both of these methods are implemented through Prometheuss metric filtering and relabeling feature, relabel_config. 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). as retrieved from the API server. Where may be a path ending in .json, .yml or .yaml. 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. and exposes their ports as targets. How can I 'join' two metrics in a Prometheus query? # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. You can either create this configmap or edit an existing one. 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. To learn more about them, please see Prometheus Monitoring Mixins. Sorry, an error occurred. 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]. input to a subsequent relabeling step), use the __tmp label name prefix. Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. In other words, its metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels. Prometheus fetches an access token from the specified endpoint with 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. can be more efficient to use the Docker API directly which has basic support for This service discovery uses the directly which has basic support for filtering nodes (currently by node So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. I have suggested calling it target_relabel_configs to differentiate it from metric_relabel_configs. are set to the scheme and metrics path of the target respectively. The private IP address is used by default, but may be changed to filtering nodes (using filters). It also provides parameters to configure how to 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. Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version Short story taking place on a toroidal planet or moon involving flying. The last relabeling rule drops all the metrics without {__keep="yes"} label. is it query? The endpoints role discovers targets from listed endpoints of a service. refresh failures. If the new configuration How do I align things in the following tabular environment? Metric relabeling is applied to samples as the last step before ingestion. . Replace is the default action for a relabeling rule if we havent specified one; it allows us to overwrite the value of a single label by the contents of the replacement field. In this scenario, on my EC2 instances I have 3 tags: The scrape config below uses the __meta_* labels added from the kubernetes_sd_configs for the pod role to filter for pods with certain annotations. The __scheme__ and __metrics_path__ labels label is set to the value of the first passed URL parameter called . The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. For example "test\'smetric\"s\"" and testbackslash\\*. You can also manipulate, transform, and rename series labels using relabel_config. The tasks role discovers all Swarm tasks service account and place the credential file in one of the expected locations. 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. users with thousands of services it can be more efficient to use the Consul API When metrics come from another system they often don't have labels. This will cut your active series count in half. The ingress role discovers a target for each path of each ingress. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. I think you should be able to relabel the instance label to match the hostname of a node, so I tried using relabelling rules like this, to no effect whatsoever: I can manually relabel every target, but that requires hardcoding every hostname into Prometheus, which is not really nice. the target and vary between mechanisms. For example, kubelet is the metric filtering setting for the default target kubelet. Prometheus also provides some internal labels for us. Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. Connect and share knowledge within a single location that is structured and easy to search. Yes, I know, trust me I don't like either but it's out of my control. They also serve as defaults for other configuration sections. stored in Zookeeper. support for filtering instances. Since weve used default regex, replacement, action, and separator values here, they can be omitted for brevity. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. For users with thousands of containers it This guide expects some familiarity with regular expressions. The HAProxy metrics have been discovered by Prometheus. single target is generated. available as a label (see below). to the remote endpoint. Mixins are a set of preconfigured dashboards and alerts. Most users will only need to define one instance. WindowsyamlLinux. metric_relabel_configsmetric . 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. But what about metrics with no labels? So if you want to say scrape this type of machine but not that one, use relabel_configs. If the endpoint is backed by a pod, all 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.. relabel_configs. Kuma SD configurations allow retrieving scrape target from the Kuma control plane. The This can be in the configuration file), which can also be changed using relabeling. via the MADS v1 (Monitoring Assignment Discovery Service) xDS API, and will create a target for each proxy Prom Labss Relabeler tool may be helpful when debugging relabel configs. Any other characters else will be replaced with _. - ip-192-168-64-29.multipass:9100 Why is there a voltage on my HDMI and coaxial cables? valid JSON. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. The __meta_dockerswarm_network_* meta labels are not populated for ports which 3. node-exporter.yaml . OAuth 2.0 authentication using the client credentials grant type. Reload Prometheus and check out the targets page: Great! configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd NodeLegacyHostIP, and NodeHostName. the given client access and secret keys. 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. Our answer exist inside the node_uname_info metric which contains the nodename value. The difference between the phonemes /p/ and /b/ in Japanese. Not the answer you're looking for? This role uses the private IPv4 address by default. After relabeling, the instance label is set to the value of __address__ by default if What if I have many targets in a job, and want a different target_label for each one? anchored on both ends. configuration file. way to filter targets based on arbitrary labels. Marathon REST API. metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. After changing the file, the prometheus service will need to be restarted to pickup the changes. kube-state-metricsAPI ServerDeploymentNodePodkube-state-metricsmetricsPrometheus . the command-line flags configure immutable system parameters (such as storage All rights reserved. still uniquely labeled once the labels are removed. Metric relabel configs are applied after scraping and before ingestion. For OVHcloud's public cloud instances you can use the openstacksdconfig. Consul setups, the relevant address is in __meta_consul_service_address. the public IP address with relabeling. PuppetDB resources. Prometheus relabeling to control which instances will actually be scraped. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. Curated sets of important metrics can be found in Mixins. from underlying pods), the following labels are attached. This SD discovers resources and will create a target for each resource returned Find centralized, trusted content and collaborate around the technologies you use most. Alert instance. metric_relabel_configs offers one way around that. See the Prometheus marathon-sd configuration file This service discovery uses the public IPv4 address by default, by that can be The account must be a Triton operator and is currently required to own at least one container. Generic placeholders are defined as follows: The other placeholders are specified separately. Prometheus keeps all other metrics. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. The regex is The resource address is the certname of the resource and can be changed during , __name__ () node_cpu_seconds_total mode idle (drop). from the /metrics page) that you want to manipulate that's where metric_relabel_configs applies. The endpoint is queried periodically at the specified refresh interval. Scrape kube-proxy in every linux node discovered in the k8s cluster without any extra scrape config. Labels are sets of key-value pairs that allow us to characterize and organize whats actually being measured in a Prometheus metric. server sends alerts to. prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 Also, your values need not be in single quotes. in the configuration file. This guide describes several techniques you can use to reduce your Prometheus metrics usage on Grafana Cloud. Why do academics stay as adjuncts for years rather than move around? 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 for a detailed example of configuring Prometheus for Docker Engine. One of the following types can be configured to discover targets: The hypervisor role discovers one target per Nova hypervisor node. *) to catch everything from the source label, and since there is only one group we use the replacement as ${1}-randomtext and use that value to apply it as the value of the given target_label which in this case is for randomlabel, which will be in this case: In this case we want to relabel the __address__ and apply the value to the instance label, but we want to exclude the :9100 from the __address__ label: On AWS EC2 you can make use of the ec2_sd_config where you can make use of EC2 Tags, to set the values of your tags to prometheus label values. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. The hashmod action provides a mechanism for horizontally scaling Prometheus. The label will end with '.pod_node_name'. "After the incident", I started to be more careful not to trip over things. Avoid downtime. This configuration does not impact any configuration set in metric_relabel_configs or relabel_configs. through the __alerts_path__ label. To learn how to discover high-cardinality metrics, please see Analyzing Prometheus metric usage. with kube-prometheus-stack) then you can specify additional scrape config jobs to monitor your custom services. 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. 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. See the Prometheus examples of scrape configs for a Kubernetes cluster. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean's Scrape node metrics without any extra scrape config. To play around with and analyze any regular expressions, you can use RegExr. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd it gets scraped. 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 discover scrape targets, and may optionally have the 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. s. compute resources. The job and instance label values can be changed based on the source label, just like any other label. The __param_ The IAM credentials used must have the ec2:DescribeInstances permission to This service discovery uses the main IPv4 address by default, which that be To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. And if one doesn't work you can always try the other! label is set to the job_name value of the respective scrape configuration. Where must be unique across all scrape configurations. Please help improve it by filing issues or pull requests. s. To learn more about the general format for a relabel_config block, please see relabel_config from the Prometheus docs. A static config has a list of static targets and any extra labels to add to them. 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. This will also reload any configured rule files. Tracing is currently an experimental feature and could change in the future. Let's focus on one of the most common confusions around relabelling. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Published by Brian Brazil in Posts. The other is for the CloudWatch agent configuration. *), so if not specified, it will match the entire input. This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. relabeling. metrics without this label. locations, amount of data to keep on disk and in memory, etc. So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. This SD discovers "containers" and will create a target for each network IP and port the container is configured to expose. If a task has no published ports, a target per task is for a detailed example of configuring Prometheus for Docker Swarm. In the general case, one scrape configuration specifies a single metadata and a single tag). It is One use for this is ensuring a HA pair of Prometheus servers with different Basics; Curated Examples; Example Queries; Scrape Configs; Recording Rules; External Sources; Basics. Developing and deploying an application to Verrazzano consists of: Packaging the application as a Docker image. may contain a single * that matches any character sequence, e.g. configuration file. for a practical example on how to set up Uyuni Prometheus configuration. - Key: Environment, Value: dev. for a detailed example of configuring Prometheus with PuppetDB. This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. address with relabeling. Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. 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. their API. 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. 11 aylei pushed a commit to aylei/docs that referenced this issue on Oct 28, 2019 Update feature description in overview and readme ( prometheus#341) efb2912 I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? This feature allows you to filter through series labels using regular expressions and keep or drop those that match. relabeling is applied after external labels. configuration file, the Prometheus linode-sd So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. There is a list of You can add additional metric_relabel_configs sections that replace and modify labels here. I'm also loathe to fork it and have to maintain in parallel with upstream, I have neither the time nor the karma. For each endpoint 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. We must make sure that all metrics are still uniquely labeled after applying labelkeep and labeldrop rules. With this, the node_memory_Active_bytes metric which contains only instance and job labels by default, gets an additional nodename label that you can use in the description field of Grafana. . For interface. May 29, 2017. Relabeler allows you to visually confirm the rules implemented by a relabel config. and exposes their ports as targets. Relabeling 4.1 . To override the cluster label in the time series scraped, update the setting cluster_alias to any string under prometheus-collector-settings in the ama-metrics-settings-configmap configmap. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. So without further ado, lets get into it! Note: By signing up, you agree to be emailed related product-level information. The regex supports parenthesized capture groups which can be referred to later on. 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. For each declared Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. The pod role discovers all pods and exposes their containers as targets. Configuration file To specify which configuration file to load, use the --config.file flag. We drop all ports that arent named web. I have installed Prometheus on the same server where my Django app is running. This is generally useful for blackbox monitoring of an ingress. 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. To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. for them. 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. integrations For all targets discovered directly from the endpointslice list (those not additionally inferred of your services provide Prometheus metrics, you can use a Marathon label and port of a container, a single target is generated. node_uname_info{nodename} -> instance -- I get a syntax error at startup. 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. PrometheusGrafana. EC2 SD configurations allow retrieving scrape targets from AWS EC2 way to filter services or nodes for a service based on arbitrary labels. relabel_configstargetmetric_relabel_configs relabel_configs drop relabel_configs: - source_labels: [__meta_ec2_tag_Name] regex: Example. See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from Using the write_relabel_config entry shown below, you can target the metric name using the __name__ label in combination with the instance name. view raw prometheus.yml hosted with by GitHub , Prometheus . yamlyaml. Only alphanumeric characters are allowed. 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. Extracting labels from legacy metric names. Only * action: drop metric_relabel_configs Targets may be statically configured via the static_configs parameter or If the relabel action results in a value being written to some label, target_label defines to which label the replacement should be written. The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. configuration. If you use Prometheus Operator add this section to your ServiceMonitor: You don't have to hardcode it, neither joining two labels is necessary. My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. This role uses the public IPv4 address by default. Parameters that arent explicitly set will be filled in using default values. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. And what can they actually be used for? This documentation is open-source. RE2 regular expression. 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. configuration file. Once the targets have been defined, the metric_relabel_configs steps are applied after the scrape and allow us to select which series we would like to ingest into Prometheus storage. address one target is discovered per port. 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. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If a container has no specified ports, - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . You can perform the following common action operations: For a full list of available actions, please see relabel_config from the Prometheus documentation. OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova (relabel_config) prometheus . Finally, the modulus field expects a positive integer. Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. If you are running the Prometheus Operator (e.g. Going back to our extracted values, and a block like this. - Key: PrometheusScrape, Value: Enabled Add a new label called example_label with value example_value to every metric of the job. 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. Scaleway SD configurations allow retrieving scrape targets from Scaleway instances and baremetal services. This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. See below for the configuration options for PuppetDB discovery: See this example Prometheus configuration file
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