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. refresh interval. Its value is set to the If shipping samples to Grafana Cloud, you also have the option of persisting samples locally, but preventing shipping to remote storage. Catalog API. This may be changed with relabeling. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. They are set by the service discovery mechanism that provided configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd may contain a single * that matches any character sequence, e.g. domain names which are periodically queried to discover a list of targets. instance it is running on should have at least read-only permissions to the It is the canonical way to specify static targets in a scrape 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.. 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. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml 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 . Prometheus relabel_configs 4. For example, when measuring HTTP latency, we might use labels to record the HTTP method and status returned, which endpoint was called, and which server was responsible for the request. We have a generous free forever tier and plans for every use case. Email update@grafana.com for help. Prometheus also provides some internal labels for us. The result can then be matched against using a regex, and an action operation can be performed if a match occurs. Using a standard prometheus config to scrape two targets: The terminal should return the message "Server is ready to receive web requests." Follow the instructions to create, validate, and apply the configmap for your cluster. Vultr SD configurations allow retrieving scrape targets from Vultr. It If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. If it finds the instance_ip label, it renames this label to host_ip. This feature allows you to filter through series labels using regular expressions and keep or drop those that match. changed with relabeling, as demonstrated in the Prometheus scaleway-sd can be more efficient to use the Docker API directly which has basic support for Nomad SD configurations allow retrieving scrape targets from Nomad's tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. Mixins are a set of preconfigured dashboards and alerts. A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. Metric relabeling is applied to samples as the last step before ingestion. So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. *), so if not specified, it will match the entire input. So if you want to say scrape this type of machine but not that one, use relabel_configs. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. RFC6763. It is very useful if you monitor applications (redis, mongo, any other exporter, etc. Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. Only For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. 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. Making statements based on opinion; back them up with references or personal experience. Lets start off with source_labels. Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. Grafana Labs uses cookies for the normal operation of this website. instances it can be more efficient to use the EC2 API directly which has For non-list parameters the relabeling is applied after external labels. relabeling is completed. The result of the concatenation is the string node-42 and the MD5 of the string modulus 8 is 5. changed with relabeling, as demonstrated in the Prometheus digitalocean-sd Thanks for contributing an answer to Stack Overflow! ec2:DescribeAvailabilityZones permission if you want the availability zone ID We could offer this as an alias, to allow config file transition for Prometheus 3.x. To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. 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. 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. A consists of seven fields. Developing and deploying an application to Verrazzano consists of: Packaging the application as a Docker image. Powered by Octopress, - targets: ['ip-192-168-64-29.multipass:9100'], - targets: ['ip-192-168-64-30.multipass:9100'], # Config: https://github.com/prometheus/prometheus/blob/release-2.36/config/testdata/conf.good.yml, ./prometheus.yml:/etc/prometheus/prometheus.yml, '--config.file=/etc/prometheus/prometheus.yml', '--web.console.libraries=/etc/prometheus/console_libraries', '--web.console.templates=/etc/prometheus/consoles', '--web.external-url=http://prometheus.127.0.0.1.nip.io', https://grafana.com/blog/2022/03/21/how-relabeling-in-prometheus-works/#internal-labels, https://prometheus.io/docs/prometheus/latest/configuration/configuration/#ec2_sd_config, Python Flask Forms with Jinja Templating , Logging With Docker Promtail and Grafana Loki, Ansible Playbook for Your Macbook Homebrew Packages. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. discovery mechanism. Additionally, relabel_configs allow advanced modifications to any relabeling does not apply to automatically generated timeseries such as up. The following meta labels are available on all targets during relabeling: The labels below are only available for targets with role set to hcloud: The labels below are only available for targets with role set to robot: HTTP-based service discovery provides a more generic way to configure static targets If the new configuration If a container has no specified ports, The default regex value is (. The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. Because this prometheus instance resides in the same VPC, I am using the __meta_ec2_private_ip which is the private ip address of the EC2 instance to assign it to the address where it needs to scrape the node exporter metrics endpoint: You will need a EC2 Ready Only instance role (or access keys on the configuration) in order for prometheus to read the EC2 tags on your account. 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 Where may be a path ending in .json, .yml or .yaml. OpenStack SD configurations allow retrieving scrape targets from OpenStack Nova See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's First off, the relabel_configs key can be found as part of a scrape job definition. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. Prometheus Scrape cAdvisor in every node in the k8s cluster without any extra scrape config. Alert relabeling is applied to alerts before they are sent to the Alertmanager. ), but not system components (kubelet, node-exporter, kube-scheduler, .,) system components do not need most of the labels (endpoint . 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. Targets may be statically configured via the static_configs parameter or create a target group for every app that has at least one healthy task. Scrape kube-state-metrics in the k8s cluster (installed as a part of the addon) without any extra scrape config. Use the following to filter IN metrics collected for the default targets using regex based filtering. service account and place the credential file in one of the expected locations. See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. 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 The Linux Foundation has registered trademarks and uses trademarks. Droplets API. relabeling phase. For example, kubelet is the metric filtering setting for the default target kubelet. - ip-192-168-64-30.multipass:9100. Relabeling and filtering at this stage modifies or drops samples before Prometheus ingests them locally and ships them to remote storage. Short story taking place on a toroidal planet or moon involving flying. Prometheus keeps all other metrics. . prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 Metric relabel configs are applied after scraping and before ingestion. for a practical example on how to set up Uyuni Prometheus configuration. The private IP address is used by default, but may be changed to 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. Much of the content here also applies to Grafana Agent users. to filter proxies and user-defined tags. For each published port of a service, a 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. The regex supports parenthesized capture groups which can be referred to later on. used by Finagle and 5.6K subscribers in the PrometheusMonitoring community. The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. You can also manipulate, transform, and rename series labels using relabel_config. These are: A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order theyre defined in. The HTTP header Content-Type must be application/json, and the body must be DNS servers to be contacted are read from /etc/resolv.conf. Changes to all defined files are detected via disk watches For users with thousands of of your services provide Prometheus metrics, you can use a Marathon label and This is often resolved by using metric_relabel_configs instead (the reverse has also happened, but it's far less common). Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. Which seems odd. So now that we understand what the input is for the various relabel_config rules, how do we create one? To learn more, please see Regular expression on Wikipedia. This will also reload any configured rule files. 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. Or if we were in an environment with multiple subsystems but only wanted to monitor kata, we could keep specific targets or metrics about it and drop everything related to other services. For each endpoint I just came across this problem and the solution is to use a group_left to resolve this problem. job. Downloads. which automates the Prometheus setup on top of Kubernetes. , __name__ () node_cpu_seconds_total mode idle (drop). Each target has a meta label __meta_url during the To specify which configuration file to load, use the --config.file flag. 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. Hetzner SD configurations allow retrieving scrape targets from For example "test\'smetric\"s\"" and testbackslash\\*. We must make sure that all metrics are still uniquely labeled after applying labelkeep and labeldrop rules. engine. Prometheus applies this relabeling and dropping step after performing target selection using relabel_configs and metric selection and relabeling using metric_relabel_configs. for a detailed example of configuring Prometheus for Kubernetes. Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The other is for the CloudWatch agent configuration. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or - Key: Name, Value: pdn-server-1 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. PuppetDB resources. See below for the configuration options for Triton discovery: Eureka SD configurations allow retrieving scrape targets using the Any other characters else will be replaced with _. Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. The private IP address is used by default, but may be changed to the public IP This set of targets consists of one or more Pods that have one or more defined ports. 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. the public IP address with relabeling. relabeling phase. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. discover scrape targets, and may optionally have the their API. interface. 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]. Only alphanumeric characters are allowed. Robot API. Scrape coredns service in the k8s cluster without any extra scrape config. the target and vary between mechanisms. r/kubernetes I've been collecting a list of k8s/container tools and sorting them by the number of stars in Github, so far the most complete k8s/container list I know of with almost 250 entries - hoping this is useful for someone else besides me - looking for feedback, ideas for improvement and contributors To view all available command-line flags, run ./prometheus -h. Prometheus can reload its configuration at runtime. One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. You can reduce the number of active series sent to Grafana Cloud in two ways: Allowlisting: This involves keeping a set of important metrics and labels that you explicitly define, and dropping everything else. The HAProxy metrics have been discovered by Prometheus. 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. valid JSON. configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. metric_relabel_configs relabel_configsreplace Prometheus K8S . inside a Prometheus-enabled mesh. 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.). 3. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. The __meta_dockerswarm_network_* meta labels are not populated for ports which There is a list of The replace action is most useful when you combine it with other fields. Omitted fields take on their default value, so these steps will usually be shorter. // Config is the top-level configuration for Prometheus's config files. stored in Zookeeper. Where must be unique across all scrape configurations. Azure SD configurations allow retrieving scrape targets from Azure VMs. The new label will also show up in the cluster parameter dropdown in the Grafana dashboards instead of the default one. So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. changed with relabeling, as demonstrated in the Prometheus hetzner-sd This relabeling occurs after target selection. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. To allowlist metrics and labels, you should identify a set of core important metrics and labels that youd like to keep. Consul setups, the relevant address is in __meta_consul_service_address. entities and provide advanced modifications to the used API path, which is exposed Find centralized, trusted content and collaborate around the technologies you use most. If you are running the Prometheus Operator (e.g. To enable denylisting in Prometheus, use the drop and labeldrop actions with any relabeling configuration. See below for the configuration options for PuppetDB discovery: See this example Prometheus configuration file When we want to relabel one of the source the prometheus internal labels, __address__ which will be the given target including the port, then we apply regex: (. as retrieved from the API server. which rule files to load. May 30th, 2022 3:01 am RE2 regular expression. changed with relabeling, as demonstrated in the Prometheus vultr-sd Note: By signing up, you agree to be emailed related product-level information. See this example Prometheus configuration file In other words, its metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels. Aurora. So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. After relabeling, the instance label is set to the value of __address__ by default if Our answer exist inside the node_uname_info metric which contains the nodename value. Metric 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. Most users will only need to define one instance. Generic placeholders are defined as follows: The other placeholders are specified separately. Multiple relabeling steps can be configured per scrape configuration. for a detailed example of configuring Prometheus with PuppetDB. available as a label (see below). Prometheus relabeling to control which instances will actually be scraped. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. See below for the configuration options for GCE discovery: Credentials are discovered by the Google Cloud SDK default client by looking OAuth 2.0 authentication using the client credentials grant type. 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.