prometheus relabel_configs vs metric_relabel_configs

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. A blog on monitoring, scale and operational Sanity. Our answer exist inside the node_uname_info metric which contains the nodename value. metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. There's the idea that the exporter should be "fixed', but I'm hesitant to go down the rabbit hole of a potentially breaking change to a widely used project. * action: drop metric_relabel_configs 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. To learn more, see our tips on writing great answers. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. Where may be a path ending in .json, .yml or .yaml. interface. Alertmanagers may be statically configured via the static_configs parameter or 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 instance role discovers one target per network interface of Nova Open positions, Check out the open source projects we support Scrape cAdvisor in every node in the k8s cluster without any extra scrape config. .). PuppetDB resources. In other words, its metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels. used by Finagle and Use the following to filter IN metrics collected for the default targets using regex based filtering. Nomad SD configurations allow retrieving scrape targets from Nomad's Avoid downtime. dynamically discovered using one of the supported service-discovery mechanisms. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. address one target is discovered per port. configuration file. In the general case, one scrape configuration specifies a single In those cases, you can use the relabel The labels can be used in the relabel_configs section to filter targets or replace labels for the targets. Only Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. entities and provide advanced modifications to the used API path, which is exposed 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: (. prefix is guaranteed to never be used by Prometheus itself. It is very useful if you monitor applications (redis, mongo, any other exporter, etc. metric_relabel_configs offers one way around that. If the relabel action results in a value being written to some label, target_label defines to which label the replacement should be written. For instance, if you created a secret named kube-prometheus-prometheus-alert-relabel-config and it contains a file named additional-alert-relabel-configs.yaml, use the parameters below: instances. Furthermore, only Endpoints that have https-metrics as a defined port name are kept. Its value is set to the for a practical example on how to set up Uyuni Prometheus configuration. Configuration file To specify which configuration file to load, use the --config.file flag. See below for the configuration options for Uyuni discovery: See the Prometheus uyuni-sd configuration file Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. How is an ETF fee calculated in a trade that ends in less than a year? created using the port parameter defined in the SD configuration. My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. Sorry, an error occurred. To specify which configuration file to load, use the --config.file flag. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. 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. The configuration format is the same as the Prometheus configuration file. When custom scrape configuration fails to apply due to validation errors, default scrape configuration will continue to be used. If not all job. This service discovery uses the public IPv4 address by default, by that can be 2023 The Linux Foundation. scrape targets from Container Monitor The private IP address is used by default, but may be changed to the public IP relabeling phase. The label will end with '.pod_node_name'. 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 For example, the following block would set a label like {env="production"}, While, continuing with the previous example, this relabeling step would set the replacement value to my_new_label. changed with relabeling, as demonstrated in the Prometheus hetzner-sd You can extract a samples metric name using the __name__ meta-label. Example scrape_configs: # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. Changes to all defined files are detected via disk watches Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. For users with thousands of containers it Parameters that arent explicitly set will be filled in using default values. through the __alerts_path__ label. To learn more about them, please see Prometheus Monitoring Mixins. This service discovery uses the public IPv4 address by default, by that can be This role uses the public IPv4 address by default. Relabeler allows you to visually confirm the rules implemented by a relabel config. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. Service API. In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. Downloads. They also serve as defaults for other configuration sections. interval and timeout. to scrape them. and exposes their ports as targets. where should i use this in prometheus? Serversets are commonly 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. The terminal should return the message "Server is ready to receive web requests." For each endpoint could be used to limit which samples are sent. Email update@grafana.com for help. - ip-192-168-64-29.multipass:9100 One source of confusion around relabeling rules is that they can be found in multiple parts of a Prometheus config file. After concatenating the contents of the subsystem and server labels, we could drop the target which exposes webserver-01 by using the following block. configuration file defines everything related to scraping jobs and their are set to the scheme and metrics path of the target respectively. 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 Why are physically impossible and logically impossible concepts considered separate in terms of probability? users with thousands of services it can be more efficient to use the Consul API DNS servers to be contacted are read from /etc/resolv.conf. The prometheus_sd_http_failures_total counter metric tracks the number of A tls_config allows configuring TLS connections. See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful my/path/tg_*.json. Any other characters else will be replaced with _. So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. The ama-metrics replicaset pod consumes the custom Prometheus config and scrapes the specified targets. write_relabel_configs is relabeling applied to samples before sending them See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful it gets scraped. The Linux Foundation has registered trademarks and uses trademarks. 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. to the Kubelet's HTTP port. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. 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. If a container has no specified ports, discovery mechanism. - targets: ['localhost:8070'] scheme: http metric_relabel_configs: - source_labels: [__name__] regex: 'organizations_total|organizations_created' action . The nodes role is used to discover Swarm nodes. Droplets API. configuration. We could offer this as an alias, to allow config file transition for Prometheus 3.x. In this case Prometheus would drop a metric like container_network_tcp_usage_total(. 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 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. metric_relabel_configs relabel_configsreplace Prometheus K8S . This will cut your active series count in half. configuration. You can, for example, only keep specific metric names. Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. <__meta_consul_address>:<__meta_consul_service_port>. For each endpoint If it finds the instance_ip label, it renames this label to host_ip. their API. Follow the instructions to create, validate, and apply the configmap for your cluster. The last path segment in the file_sd_configs: Solution: If you want to retain these labels, the relabel_configs can rewrite the label multiple times be done the following way: Doing it like this, the manually-set instance in sd_configs takes precedence, but if it's not set the port is still stripped away. node object in the address type order of NodeInternalIP, NodeExternalIP, For all targets discovered directly from the endpointslice list (those not additionally inferred configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd Metric value is set to the specified default. Otherwise each node will try to scrape all targets and will make many calls to the Kubernetes API server. Write relabeling is applied after external labels. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Scrape node metrics without any extra scrape config. With a (partial) config that looks like this, I was able to achieve the desired result. The new label will also show up in the cluster parameter dropdown in the Grafana dashboards instead of the default one. 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. 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. metric_relabel_configs /metricsmetric_relabel_configs 3.2.2 alertmanagers alertmanagers Prometheus alertmanagers Prometheuspushing alertmanager alertmanager target 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. Published by Brian Brazil in Posts. The cluster label appended to every time series scraped will use the last part of the full AKS cluster's ARM resourceID. 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 failures. Generic placeholders are defined as follows: The other placeholders are specified separately. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA Marathon REST API. 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. Where must be unique across all scrape configurations. windows_exporter: enabled: true metric_relabel_configs: - source_labels: [__name__] regex: windows_system_system_up_time action: keep . So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. So if you want to say scrape this type of machine but not that one, use relabel_configs. The replace action is most useful when you combine it with other fields. single target is generated. [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config The default Prometheus configuration file contains the following two relabeling configurations: - action: replace source_labels: [__meta_kubernetes_pod_uid] target_label: sysdig_k8s_pod_uid - action: replace source_labels: [__meta_kubernetes_pod_container_name] target_label: sysdig_k8s_pod_container_name "After the incident", I started to be more careful not to trip over things. Lets start off with source_labels. instances, as well as Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. and exposes their ports as targets. 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. To drop a specific label, select it using source_labels and use a replacement value of "". Refresh the page, check Medium 's site status,. So let's shine some light on these two configuration options. devops, docker, prometheus, Create a AWS Lambda Layer with Docker 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. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. Enter relabel_configs, a powerful way to change metric labels dynamically. The target address defaults to the private IP address of the network label is set to the value of the first passed URL parameter called . s. sudo systemctl restart prometheus To review, open the file in an editor that reveals hidden Unicode characters. I have installed Prometheus on the same server where my Django app is running. relabel_configs. In the extreme this can overload your Prometheus server, such as if you create a time series for each of hundreds of thousands of users. still uniquely labeled once the labels are removed. To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. Thanks for contributing an answer to Stack Overflow! See below for the configuration options for Docker Swarm discovery: The relabeling phase is the preferred and more powerful There is a small demo of how to use The extracted string would then be set written out to the target_label and might result in {address="podname:8080}. 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. 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. The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. 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 Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Prometheus relabel_configs 4. ), but not system components (kubelet, node-exporter, kube-scheduler, .,) system components do not need most of the labels (endpoint . See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems by the API. Prom Labss Relabeler tool may be helpful when debugging relabel configs. Reload Prometheus and check out the targets page: Great! changed with relabeling, as demonstrated in the Prometheus scaleway-sd Relabeling is a powerful tool that allows you to classify and filter Prometheus targets and metrics by rewriting their label set. Much of the content here also applies to Grafana Agent users. this functionality. The Prometheus fetches an access token from the specified endpoint with You can also manipulate, transform, and rename series labels using relabel_config. Or if youre using Prometheus Kubernetes service discovery you might want to drop all targets from your testing or staging namespaces. Initially, aside from the configured per-target labels, a target's job Add a new label called example_label with value example_value to every metric of the job. See below for the configuration options for Triton discovery: Eureka SD configurations allow retrieving scrape targets using the A configuration reload is triggered by sending a SIGHUP to the Prometheus process or node-exporter.yaml . The default regex value is (. The following rule could be used to distribute the load between 8 Prometheus instances, each responsible for scraping the subset of targets that end up producing a certain value in the [0, 7] range, and ignoring all others.

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