prometheus relabel_configs vs metric_relabel_configs

Prometheus Monitoring subreddit. This is generally useful for blackbox monitoring of a service. The result of the concatenation is the string node-42 and the MD5 of the string modulus 8 is 5. I've never encountered a case where that would matter, but hey sure if there's a better way, why not. label is set to the job_name value of the respective scrape configuration. directly which has basic support for filtering nodes (currently by node node_uname_info{nodename} -> instance -- I get a syntax error at startup. filepath from which the target was extracted. The target So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. For readability its usually best to explicitly define a relabel_config. address with relabeling. I am attempting to retrieve metrics using an API and the curl response appears to be in the correct format. For users with thousands of containers it First attempt: In order to set the instance label to $host, one can use relabel_configs to get rid of the port of your scaping target: But the above would also overwrite labels you wanted to set e.g. Changes to all defined files are detected via disk watches configuration file. Consider the following metric and relabeling step. inside a Prometheus-enabled mesh. A blog on monitoring, scale and operational Sanity. They allow us to filter the targets returned by our SD mechanism, as well as manipulate the labels it sets. Any label pairs whose names match the provided regex will be copied with the new label name given in the replacement field, by utilizing group references (${1}, ${2}, etc). instances, as well as to filter proxies and user-defined tags. configuration. If running outside of GCE make sure to create an appropriate 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. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels Using a standard prometheus config to scrape two targets: Prometheus queries: How to give a default label when it is missing? metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. 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. # prometheus $ vim /usr/local/prometheus/prometheus.yml $ sudo systemctl restart prometheus Zookeeper. support for filtering instances. See below for the configuration options for OpenStack discovery: OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS using See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from Since the (. Publishing the application's Docker image to a containe So ultimately {__tmp=5} would be appended to the metrics label set. Relabelling. The relabeling: Kubernetes SD configurations allow retrieving scrape targets from Metric relabeling is applied to samples as the last step before ingestion. Endpoints are limited to the kube-system namespace. Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. Alert relabeling is applied to alerts before they are sent to the Alertmanager. node-exporter.yaml . Scrape node metrics without any extra scrape config. If a container has no specified ports, There are Mixins for Kubernetes, Consul, Jaeger, and much more. *), so if not specified, it will match the entire input. Asking for help, clarification, or responding to other answers. Write relabeling is applied after external labels. A tls_config allows configuring TLS connections. required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. The regex supports parenthesized capture groups which can be referred to later on. integrations would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml To specify which configuration file to load, use the --config.file flag. You can additionally define remote_write-specific relabeling rules here. instances it can be more efficient to use the EC2 API directly which has metric_relabel_configs relabel_configsreplace Prometheus K8S . by the API. via the MADS v1 (Monitoring Assignment Discovery Service) xDS API, and will create a target for each proxy - ip-192-168-64-30.multipass:9100. To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. it was not set during relabeling. To learn more, please see Regular expression on Wikipedia. Note that exemplar storage is still considered experimental and must be enabled via --enable-feature=exemplar-storage. 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 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. Metric To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. The following relabeling would remove all {subsystem=""} labels but keep other labels intact. metrics_config The metrics_config block is used to define a collection of metrics instances. This will also reload any configured rule files. However, in some DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean's Prometheus fetches an access token from the specified endpoint with To view all available command-line flags, run ./prometheus -h. Prometheus can reload its configuration at runtime. which rule files to load. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. To bulk drop or keep labels, use the labelkeep and labeldrop actions. metric_relabel_configs /metricsmetric_relabel_configs 3.2.2 alertmanagers alertmanagers Prometheus alertmanagers Prometheuspushing alertmanager alertmanager target 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. 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. Refresh the page, check Medium 's site status,. Relabeling relabeling Prometheus Relabel And what can they actually be used for? A configuration reload is triggered by sending a SIGHUP to the Prometheus process or For details on custom configuration, see Customize scraping of Prometheus metrics in Azure Monitor. it gets scraped. The HAProxy metrics have been discovered by Prometheus. Using the write_relabel_config entry shown below, you can target the metric name using the __name__ label in combination with the instance name. users with thousands of services it can be more efficient to use the Consul API After scraping these endpoints, Prometheus applies the metric_relabel_configs section, which drops all metrics whose metric name matches the specified regex. It also provides parameters to configure how to See below for the configuration options for Triton discovery: Eureka SD configurations allow retrieving scrape targets using the For each declared Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . Or if youre using Prometheus Kubernetes service discovery you might want to drop all targets from your testing or staging namespaces. 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. If shipping samples to Grafana Cloud, you also have the option of persisting samples locally, but preventing shipping to remote storage. After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. Note: By signing up, you agree to be emailed related product-level information. You can either create this configmap or edit an existing one. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd If the relabel action results in a value being written to some label, target_label defines to which label the replacement should be written. which automates the Prometheus setup on top of Kubernetes. instance it is running on should have at least read-only permissions to the How can I 'join' two metrics in a Prometheus query? If the endpoint is backed by a pod, all These are SmartOS zones or lx/KVM/bhyve branded zones. This service discovery uses the public IPv4 address by default, by that can be 1Prometheus. 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. 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. . This can be 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 additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. 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. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. . The Linux Foundation has registered trademarks and uses trademarks. changed with relabeling, as demonstrated in the Prometheus scaleway-sd If a service has no published ports, a target per Otherwise each node will try to scrape all targets and will make many calls to the Kubernetes API server. They are applied to the label set of each target in order of their appearance So now that we understand what the input is for the various relabel_config rules, how do we create one? They are set by the service discovery mechanism that provided One of the following roles can be configured to discover targets: The services role discovers all Swarm services Both of these methods are implemented through Prometheuss metric filtering and relabeling feature, relabel_config. 2023 The Linux Foundation. The result can then be matched against using a regex, and an action operation can be performed if a match occurs. The replace action is most useful when you combine it with other fields. See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's To allowlist metrics and labels, you should identify a set of core important metrics and labels that youd like to keep. 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. 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. Consul setups, the relevant address is in __meta_consul_service_address. configuration. The private IP address is used by default, but may be changed to Any other characters else will be replaced with _. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . The role will try to use the public IPv4 address as default address, if there's none it will try to use the IPv6 one. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. is any valid Remote development environments that secure your source code and sensitive data The address will be set to the host specified in the ingress spec. A DNS-based service discovery configuration allows specifying a set of DNS So without further ado, lets get into it! It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. Sorry, an error occurred. Let's focus on one of the most common confusions around relabelling. Whats the grammar of "For those whose stories they are"? Reload Prometheus and check out the targets page: Great! Hetzner SD configurations allow retrieving scrape targets from 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. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. The relabel_configs section is applied at the time of target discovery and applies to each target for the job. engine. Its value is set to the Targets discovered using kubernetes_sd_configs will each have different __meta_* labels depending on what role is specified. a port-free target per container is created for manually adding a port via relabeling. Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. We could offer this as an alias, to allow config file transition for Prometheus 3.x. target is generated. anchored on both ends. 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. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. *) 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.

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