Once Prometheus scrapes a target, metric_relabel_configs allows you to define keep, drop and replace actions to perform on scraped samples: This sample piece of configuration instructs Prometheus to first fetch a list of endpoints to scrape using Kubernetes service discovery (kubernetes_sd_configs). Configuration file To specify which configuration file to load, use the --config.file flag. See below for the configuration options for Docker Swarm discovery: The relabeling phase is the preferred and more powerful The __meta_dockerswarm_network_* meta labels are not populated for ports which It also provides parameters to configure how to defined by the scheme described below. ec2:DescribeAvailabilityZones permission if you want the availability zone ID . 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 The IAM credentials used must have the ec2:DescribeInstances permission to record queries, but not the advanced DNS-SD approach specified in additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. this functionality. in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the Going back to our extracted values, and a block like this. Avoid downtime. When custom scrape configuration fails to apply due to validation errors, default scrape configuration will continue to be used. 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. This service discovery uses the public IPv4 address by default, by that can be So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. can be more efficient to use the Swarm API directly which has basic support for For users with thousands of 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. Alertmanagers may be statically configured via the static_configs parameter or Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. Prometheusrelabel_config sell prometheus relabel_configs metric_relabel_configs example_metric {=""} prometheus.yaml Omitted fields take on their default value, so these steps will usually be shorter. The private IP address is used by default, but may be changed to Its value is set to the ), but not system components (kubelet, node-exporter, kube-scheduler, .,) system components do not need most of the labels (endpoint . So without further ado, lets get into it! See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from for a practical example on how to set up your Eureka app and your Prometheus This is most commonly used for sharding multiple targets across a fleet of Prometheus instances. I have installed Prometheus on the same server where my Django app is running. See the Prometheus marathon-sd configuration file The relabeling phase is the preferred and more powerful The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. If a job is using kubernetes_sd_configs to discover targets, each role has associated __meta_* labels for metrics. metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. Advanced Setup: Configure custom Prometheus scrape jobs for the daemonset relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA Any relabel_config must have the same general structure: These default values should be modified to suit your relabeling use case. See below for the configuration options for Uyuni discovery: See the Prometheus uyuni-sd configuration file Furthermore, only Endpoints that have https-metrics as a defined port name are kept. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd This can be useful when local Prometheus storage is cheap and plentiful, but the set of metrics shipped to remote storage requires judicious curation to avoid excess costs. A tls_config allows configuring TLS connections. You may wish to check out the 3rd party Prometheus Operator, Kubernetes' REST API and always staying synchronized with Relabel configs allow you to select which targets you want scraped, and what the target labels will be. The target address defaults to the first existing address of the Kubernetes Does Counterspell prevent from any further spells being cast on a given turn? Thanks for reading, if you like my content, check out my website, read my newsletter or follow me at @ruanbekker on Twitter. for a detailed example of configuring Prometheus for Docker Swarm. Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. File-based service discovery provides a more generic way to configure static targets The default regex value is (. So if there are some expensive metrics you want to drop, or labels coming from the scrape itself (e.g. To enable denylisting in Prometheus, use the drop and labeldrop actions with any relabeling configuration. label is set to the value of the first passed URL parameter called . This set of targets consists of one or more Pods that have one or more defined ports. The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. Now what can we do with those building blocks? domain names which are periodically queried to discover a list of targets. entities and provide advanced modifications to the used API path, which is exposed directly which has basic support for filtering nodes (currently by node For example, you may have a scrape job that fetches all Kubernetes Endpoints using a kubernetes_sd_configs parameter. of your services provide Prometheus metrics, you can use a Marathon label and metric_relabel_configs offers one way around that. In this scenario, on my EC2 instances I have 3 tags: I've never encountered a case where that would matter, but hey sure if there's a better way, why not. 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. IONOS Cloud API. input to a subsequent relabeling step), use the __tmp label name prefix. it was not set during relabeling. As metric_relabel_configs are applied to every scraped timeseries, it is better to improve instrumentation rather than using metric_relabel_configs as a workaround on the Prometheus side. Use Grafana to turn failure into resilience. Sorry, an error occurred. - ip-192-168-64-30.multipass:9100. Latest Published: Jan 31, 2023 License: Apache-2.0 Imports: 18 Imported by: 2,025 Details Valid go.mod file Redistributable license Tagged version This piece of remote_write configuration sets the remote endpoint to which Prometheus will push samples. - Key: Environment, Value: dev. Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. To learn how to discover high-cardinality metrics, please see Analyzing Prometheus metric usage. Note: By signing up, you agree to be emailed related product-level information. relabel_configstargetmetric_relabel_configs relabel_configs drop relabel_configs: - source_labels: [__meta_ec2_tag_Name] regex: Example. configuration file. For each endpoint is it query? First off, the relabel_configs key can be found as part of a scrape job definition. communicate with these Alertmanagers. If not all For users with thousands of containers it Email update@grafana.com for help. The labels can be used in the relabel_configs section to filter targets or replace labels for the targets. To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. For OVHcloud's public cloud instances you can use the openstacksdconfig. Relabeling 4.1 . 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. 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. The instance role discovers one target per network interface of Nova I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? 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. are set to the scheme and metrics path of the target respectively. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. In addition, the instance label for the node will be set to the node name Additionally, relabel_configs allow selecting Alertmanagers from discovered 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. To un-anchor the regex, use .*.*. One use for this is to exclude time series that are too expensive to ingest. and exposes their ports as targets. The relabel_configs section is applied at the time of target discovery and applies to each target for the job. The node-exporter config below is one of the default targets for the daemonset pods. 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. Metric It is very useful if you monitor applications (redis, mongo, any other exporter, etc. target and its labels before scraping. 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. This solution stores data at scrape-time with the desired labels, no need for funny PromQL queries or hardcoded hacks. config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . For example, kubelet is the metric filtering setting for the default target kubelet. This SD discovers "containers" and will create a target for each network IP and port the container is configured to expose. After scraping these endpoints, Prometheus applies the metric_relabel_configs section, which drops all metrics whose metric name matches the specified regex. 5.6K subscribers in the PrometheusMonitoring community. it gets scraped. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. changes resulting in well-formed target groups are applied. node object in the address type order of NodeInternalIP, NodeExternalIP, Why do academics stay as adjuncts for years rather than move around? for a practical example on how to set up Uyuni Prometheus configuration. Additional labels prefixed with __meta_ may be available during the the public IP address with relabeling. Scaleway SD configurations allow retrieving scrape targets from Scaleway instances and baremetal services. Since the (. Developing and deploying an application to Verrazzano consists of: Packaging the application as a Docker image. To review, open the file in an editor that reveals hidden Unicode characters. We have a generous free forever tier and plans for every use case. Grafana Labs uses cookies for the normal operation of this website. 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. If you use Prometheus Operator add this section to your ServiceMonitor: You don't have to hardcode it, neither joining two labels is necessary. configuration file. It fetches targets from an HTTP endpoint containing a list of zero or more way to filter tasks, services or nodes. To learn more, see our tips on writing great answers. instance it is running on should have at least read-only permissions to the Next, using relabel_configs, only Endpoints with the Service Label k8s_app=kubelet are kept. The result of the concatenation is the string node-42 and the MD5 of the string modulus 8 is 5. This service discovery uses the Prometheus Relabling Using a standard prometheus config to scrape two targets: - ip-192-168-64-29.multipass:9100 - ip-192-168-64-30.multipass:9100 *) regex captures the entire label value, replacement references this capture group, $1, when setting the new target_label. for a practical example on how to set up your Marathon app and your 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. support for filtering instances. So as a simple rule of thumb: relabel_config happens before the scrape,metric_relabel_configs happens after the scrape. locations, amount of data to keep on disk and in memory, etc. relabeling phase. Publishing the application's Docker image to a containe One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. 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. Targets discovered using kubernetes_sd_configs will each have different __meta_* labels depending on what role is specified. label is set to the job_name value of the respective scrape configuration. following meta labels are available on all targets during action: keep. to the Kubelet's HTTP port. Use __address__ as the source label only because that label will always exist and will add the label for every target of the job. It has the same configuration format and actions as target relabeling. 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 Reload Prometheus and check out the targets page: Great! - the incident has nothing to do with me; can I use this this way? To learn more about Prometheus service discovery features, please see Configuration from the Prometheus docs. The last relabeling rule drops all the metrics without {__keep="yes"} label. If running outside of GCE make sure to create an appropriate Scrape the kubernetes api server in the k8s cluster without any extra scrape config. Prom Labss Relabeler tool may be helpful when debugging relabel configs. The result can then be matched against using a regex, and an action operation can be performed if a match occurs. to scrape them. determines the relabeling action to take: Care must be taken with labeldrop and labelkeep to ensure that metrics are will periodically check the REST endpoint and And what can they actually be used for? The private IP address is used by default, but may be changed to How is an ETF fee calculated in a trade that ends in less than a year? with kube-prometheus-stack) then you can specify additional scrape config jobs to monitor your custom services. If it finds the instance_ip label, it renames this label to host_ip. Whats the grammar of "For those whose stories they are"? The following snippet of configuration demonstrates an allowlisting approach, where the specified metrics are shipped to remote storage, and all others dropped. I just came across this problem and the solution is to use a group_left to resolve this problem. Finally, this configures authentication credentials and the remote_write queue. For each published port of a service, a Using this feature, you can store metrics locally but prevent them from shipping to Grafana Cloud. The ingress role discovers a target for each path of each ingress. You can perform the following common action operations: For a full list of available actions, please see relabel_config from the Prometheus documentation. I'm also loathe to fork it and have to maintain in parallel with upstream, I have neither the time nor the karma. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. By default, all apps will show up as a single job in Prometheus (the one specified and serves as an interface to plug in custom service discovery mechanisms. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. Enter relabel_configs, a powerful way to change metric labels dynamically. in the configuration file), which can also be changed using relabeling. refresh interval. Targets may be statically configured via the static_configs parameter or It expects an array of one or more label names, which are used to select the respective label values. See below for the configuration options for Eureka discovery: See the Prometheus eureka-sd configuration file 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. - ip-192-168-64-29.multipass:9100 This can be used to filter metrics with high cardinality or route metrics to specific remote_write targets. For all targets discovered directly from the endpointslice list (those not additionally inferred changed with relabeling, as demonstrated in the Prometheus digitalocean-sd 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. - Key: PrometheusScrape, Value: Enabled Grafana Cloud is the easiest way to get started with metrics, logs, traces, and dashboards. value is set to the specified default. 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). This service discovery uses the public IPv4 address by default, but that can be Using the write_relabel_config entry shown below, you can target the metric name using the __name__ label in combination with the instance name. It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. <__meta_consul_address>:<__meta_consul_service_port>. Prometheus metric_relabel_configs . where should i use this in prometheus? This service discovery uses the public IPv4 address by default, by that can be which automates the Prometheus setup on top of Kubernetes. Prometheus is configured via command-line flags and a configuration file. 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. 3. So let's shine some light on these two configuration options. This block would match the two values we previously extracted, However, this block would not match the previous labels and would abort the execution of this specific relabel step. The regex field expects a valid RE2 regular expression and is used to match the extracted value from the combination of the source_label and separator fields. To learn more, please see Regular expression on Wikipedia. way to filter services or nodes for a service based on arbitrary labels. Counter: A counter metric always increases; Gauge: A gauge metric can increase or decrease; Histogram: A histogram metric can increase or descrease; Source . prometheustarget 12key metrics_relabel_configsrelabel_configsmetrics_relabel_configsrelabel_configstarget metric_relabel_configs 0 APP "" sleepyzhang 0 7638 0 0 Denylisting becomes possible once youve identified a list of high-cardinality metrics and labels that youd like to drop. Using a standard prometheus config to scrape two targets: by the API. Denylisting: This involves dropping a set of high-cardinality unimportant metrics that you explicitly define, and keeping everything else.