PuppetDB resources. still uniquely labeled once the labels are removed. Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . Using the write_relabel_config entry shown below, you can target the metric name using the __name__ label in combination with the instance name. Use the following to filter IN metrics collected for the default targets using regex based filtering. To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. discover scrape targets, and may optionally have the The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. 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. the public IP address with relabeling. Enter relabel_configs, a powerful way to change metric labels dynamically. PrometheusGrafana. Alertmanagers may be statically configured via the static_configs parameter or would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. The node-exporter config below is one of the default targets for the daemonset pods. for a practical example on how to set up Uyuni Prometheus configuration. from the /metrics page) that you want to manipulate that's where metric_relabel_configs applies. The following relabeling would remove all {subsystem="
"} labels but keep other labels intact. relabeling phase. Tags: prometheus, relabelling. The difference between the phonemes /p/ and /b/ in Japanese. 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 . Omitted fields take on their default value, so these steps will usually be shorter. The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. Tracing is currently an experimental feature and could change in the future. via Uyuni API. 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 HAProxy metrics have been discovered by Prometheus. it gets scraped. The endpointslice role discovers targets from existing endpointslices. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels instances. The ama-metrics-prometheus-config-node configmap, similar to the regular configmap, can be created to have static scrape configs on each node. For Any other characters else will be replaced with _. Triton SD configurations allow retrieving For users with thousands of containers it However, in some filepath from which the target was extracted. This may be changed with relabeling. 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. Note that adding an additional scrape . EC2 SD configurations allow retrieving scrape targets from AWS EC2 Prometheus relabeling to control which instances will actually be scraped. Making statements based on opinion; back them up with references or personal experience. Since the (. Refresh the page, check Medium 's site status,. Prometheus will periodically check the REST endpoint and create a target for every discovered server. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. 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. changes resulting in well-formed target groups are applied. For reference, heres our guide to Reducing Prometheus metrics usage with relabeling. For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. The cn role discovers one target for per compute node (also known as "server" or "global zone") making up the Triton infrastructure. You can also manipulate, transform, and rename series labels using relabel_config. Hetzner Cloud API and We must make sure that all metrics are still uniquely labeled after applying labelkeep and labeldrop rules. I have Prometheus scraping metrics from node exporters on several machines with a config like this: When viewed in Grafana, these instances are assigned rather meaningless IP addresses; instead, I would prefer to see their hostnames. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. are set to the scheme and metrics path of the target respectively. Prometheus A blog on monitoring, scale and operational Sanity. which automates the Prometheus setup on top of Kubernetes. DNS servers to be contacted are read from /etc/resolv.conf. Please help improve it by filing issues or pull requests. This will also reload any configured rule files. 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. Relabeling is a powerful tool to dynamically rewrite the label set of a target before 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. The private IP address is used by default, but may be changed to A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. The replace action is most useful when you combine it with other fields. For OVHcloud's public cloud instances you can use the openstacksdconfig. It metrics without this label. Prometheus is an open-source monitoring and alerting toolkit that collects and stores its metrics as time series data. You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. For each published port of a service, a It is If not all Only alphanumeric characters are allowed. support for filtering instances. This is to ensure that different components that consume this label will adhere to the basic alphanumeric convention. Scrape cAdvisor in every node in the k8s cluster without any extra scrape config. changed with relabeling, as demonstrated in the Prometheus vultr-sd To learn more about remote_write, please see remote_write from the official Prometheus docs. the public IP address with relabeling. create a target for every app instance. metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. configuration file defines everything related to scraping jobs and their . 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. 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. Alert I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? ec2:DescribeAvailabilityZones permission if you want the availability zone ID Currently supported are the following sections: Any other unsupported sections need to be removed from the config before applying as a configmap. You can place all the logic in the targets section using some separator - I used @ and then process it with regex. 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. devops, docker, prometheus, Create a AWS Lambda Layer with Docker additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the where should i use this in prometheus? Posted by Ruan See the Prometheus examples of scrape configs for a Kubernetes cluster. The instance role discovers one target per network interface of Nova Relabeler allows you to visually confirm the rules implemented by a relabel config. Avoid downtime. For example, kubelet is the metric filtering setting for the default target kubelet. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. will periodically check the REST endpoint for currently running tasks and Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. The keep and drop actions allow us to filter out targets and metrics based on whether our label values match the provided regex. These relabeling steps are applied before the scrape occurs and only have access to labels added by Prometheus Service Discovery. This service discovery uses the main IPv4 address by default, which that be If the endpoint is backed by a pod, all Some of these special labels available to us are. In many cases, heres where internal labels come into play. rev2023.3.3.43278. This set of targets consists of one or more Pods that have one or more defined ports. metric_relabel_configs /metricsmetric_relabel_configs 3.2.2 alertmanagers alertmanagers Prometheus alertmanagers Prometheuspushing alertmanager alertmanager target It fetches targets from an HTTP endpoint containing a list of zero or more Marathon SD configurations allow retrieving scrape targets using the - ip-192-168-64-29.multipass:9100 3. is it query? One use for this is to exclude time series that are too expensive to ingest. Prometheus also provides some internal labels for us. To do this, use a relabel_config object in the write_relabel_configs subsection of the remote_write section of your Prometheus config. As an example, consider the following two metrics. record queries, but not the advanced DNS-SD approach specified in So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. If it finds the instance_ip label, it renames this label to host_ip. If shipping samples to Grafana Cloud, you also have the option of persisting samples locally, but preventing shipping to remote storage. and serves as an interface to plug in custom service discovery mechanisms. Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. Use the metric_relabel_configs section to filter metrics after scraping. This SD discovers resources and will create a target for each resource returned See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. Or if youre using Prometheus Kubernetes service discovery you might want to drop all targets from your testing or staging namespaces. While Next I came across something that said that Prom will fill in instance with the value of address if the collector doesn't supply a value, and indeed for some reason it seems as though my scrapes of node_exporter aren't getting one. *) regex captures the entire label value, replacement references this capture group, $1, when setting the new target_label. to the remote endpoint. Now what can we do with those building blocks? If the relabel action results in a value being written to some label, target_label defines to which label the replacement should be written. required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. - the incident has nothing to do with me; can I use this this way? filtering containers (using filters). This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. The resource address is the certname of the resource and can be changed during After changing the file, the prometheus service will need to be restarted to pickup the changes. 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. A consists of seven fields. Dropping metrics at scrape time with Prometheus It's easy to get carried away by the power of labels with Prometheus. I'm working on file-based service discovery from a DB dump that will be able to write these targets out. I'm not sure if that's helpful. Scrape node metrics without any extra scrape config. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. If the new configuration Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml If a service has no published ports, a target per This will cut your active series count in half. We've looked at the full Life of a Label. Grafana Cloud is the easiest way to get started with metrics, logs, traces, and dashboards. The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. 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. prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 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). One use for this is ensuring a HA pair of Prometheus servers with different For each endpoint There is a small demo of how to use directly which has basic support for filtering nodes (currently by node The last relabeling rule drops all the metrics without {__keep="yes"} label. Eureka REST API. Since weve used default regex, replacement, action, and separator values here, they can be omitted for brevity. action: keep. These are SmartOS zones or lx/KVM/bhyve branded zones. But still that shouldn't matter, I dunno why node_exporter isn't supplying any instance label at all since it does find the hostname for the info metric (where it doesn't do me any good). Please find below an example from other exporter (blackbox), but same logic applies for node exporter as well. When we configured Prometheus to run as a service, we specified the path of /etc/prometheus/prometheus.yml. Furthermore, only Endpoints that have https-metrics as a defined port name are kept. WindowsyamlLinux. For each endpoint Below are examples of how to do so. Prometheus Monitoring subreddit. 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. relabeling is applied after external labels. 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]. metric_relabel_configs offers one way around that. Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. Blog | Training | Book | Privacy, relabel_configs vs metric_relabel_configs. label is set to the job_name value of the respective scrape configuration. of your services provide Prometheus metrics, you can use a Marathon label and address with relabeling. This service discovery uses the Use Grafana to turn failure into resilience. *) 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. Which seems odd. Each target has a meta label __meta_filepath during the Kuma SD configurations allow retrieving scrape target from the Kuma control plane. Brackets indicate that a parameter is optional. By default, all apps will show up as a single job in Prometheus (the one specified IONOS Cloud API. The private IP address is used by default, but may be changed to the public IP 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. One of the following roles can be configured to discover targets: The services role discovers all Swarm services If a container has no specified ports, Grafana Labs uses cookies for the normal operation of this website. Prometheus K8SYaml K8S For all targets discovered directly from the endpoints list (those not additionally inferred 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. First off, the relabel_configs key can be found as part of a scrape job definition. They are set by the service discovery mechanism that provided prefix is guaranteed to never be used by Prometheus itself. Downloads. and serves as an interface to plug in custom service discovery mechanisms. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail 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. inside a Prometheus-enabled mesh. Short story taking place on a toroidal planet or moon involving flying. To drop a specific label, select it using source_labels and use a replacement value of "". and exposes their ports as targets. 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. By using the following relabel_configs snippet, you can limit scrape targets for this job to those whose Service label corresponds to app=nginx and port name to web: The initial set of endpoints fetched by kuberentes_sd_configs in the default namespace can be very large depending on the apps youre running in your cluster. 5.6K subscribers in the PrometheusMonitoring community. This is experimental and could change in the future. and exposes their ports as targets. It does so by replacing the labels for scraped data by regexes with relabel_configs. 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. 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 Where must be unique across all scrape configurations. If a task has no published ports, a target per task is Add a new label called example_label with value example_value to every metric of the job. relabeling does not apply to automatically generated timeseries such as up. The terminal should return the message "Server is ready to receive web requests." changed with relabeling, as demonstrated in the Prometheus hetzner-sd way to filter targets based on arbitrary labels. The address will be set to the host specified in the ingress spec. To learn how to discover high-cardinality metrics, please see Analyzing Prometheus metric usage. - Key: Environment, Value: dev. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA Prometheus supports relabeling, which allows performing the following tasks: Adding new label Updating existing label Rewriting existing label Updating metric name Removing unneeded labels. Otherwise each node will try to scrape all targets and will make many calls to the Kubernetes API server. Labels starting with __ will be removed from the label set after target You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. Where may be a path ending in .json, .yml or .yaml. Note: By signing up, you agree to be emailed related product-level information. is not well-formed, the changes will not be applied. relabeling phase. Prometheus applies this relabeling and dropping step after performing target selection using relabel_configs and metric selection and relabeling using metric_relabel_configs. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. 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. After relabeling, the instance label is set to the value of __address__ by default if However, its usually best to explicitly define these for readability. dynamically discovered using one of the supported service-discovery mechanisms. relabel_configs: - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape] action: keep regex: true // keep targets with label __meta_kubernetes_service_annotation_prometheus_io_scrape equals 'true', // which means the user added prometheus.io/scrape: true in the service's annotation. Endpoints are limited to the kube-system namespace. Connect and share knowledge within a single location that is structured and easy to search. relabeling. Its value is set to the Grafana Labs uses cookies for the normal operation of this website. May 29, 2017. See below for the configuration options for GCE discovery: Credentials are discovered by the Google Cloud SDK default client by looking The target address defaults to the first existing address of the Kubernetes You can either create this configmap or edit an existing one. this functionality. So ultimately {__tmp=5} would be appended to the metrics label set. 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. Relabelling. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else. 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 target and its labels before scraping. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd locations, amount of data to keep on disk and in memory, etc. The IAM credentials used must have the ec2:DescribeInstances permission to and applied immediately. Using this feature, you can store metrics locally but prevent them from shipping to Grafana Cloud. contexts. See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful It is the canonical way to specify static targets in a scrape The __address__ label is set to the : address of the target. Additionally, relabel_configs allow advanced modifications to any I've never encountered a case where that would matter, but hey sure if there's a better way, why not.