Let's focus on one of the most common confusions around relabelling. For users with thousands of containers it To enable denylisting in Prometheus, use the drop and labeldrop actions with any relabeling configuration. One use for this is to exclude time series that are too expensive to ingest. Prometheus fetches an access token from the specified endpoint with 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. Overview. The private IP address is used by default, but may be changed to sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). Metric relabel configs are applied after scraping and before ingestion. To enable allowlisting in Prometheus, use the keep and labelkeep actions with any relabeling configuration. used by Finagle and metadata and a single tag). If it finds the instance_ip label, it renames this label to host_ip. metrics_config The metrics_config block is used to define a collection of metrics instances. could be used to limit which samples are sent. To un-anchor the regex, use .*.*. Marathon REST API. For now, Prometheus Operator adds following labels automatically: endpoint, instance, namespace, pod, and service. The CloudWatch agent with Prometheus monitoring needs two configurations to scrape the Prometheus metrics. sudo systemctl restart prometheus The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. Consider the following metric and relabeling step. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. node-exporter.yaml . and applied immediately. Prometheus is configured via command-line flags and a configuration file. way to filter services or nodes for a service based on arbitrary labels. 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. I used the answer to this post as a model for my request: https://stackoverflow.com/a/50357418 . See this example Prometheus configuration file *) 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. 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. This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. This configuration does not impact any configuration set in metric_relabel_configs or relabel_configs. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. Why does Mister Mxyzptlk need to have a weakness in the comics? To drop a specific label, select it using source_labels and use a replacement value of "". For non-list parameters the When metrics come from another system they often don't have labels. 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. label is set to the value of the first passed URL parameter called . The endpointslice role discovers targets from existing endpointslices. You can filter series using Prometheuss relabel_config configuration object. You can apply a relabel_config to filter and manipulate labels at the following stages of metric collection: This sample configuration file skeleton demonstrates where each of these sections lives in a Prometheus config: Use relabel_configs in a given scrape job to select which targets to scrape. Scaleway SD configurations allow retrieving scrape targets from Scaleway instances and baremetal services. Add a new label called example_label with value example_value to every metric of the job. How can they help us in our day-to-day work? For OVHcloud's public cloud instances you can use the openstacksdconfig. configuration file. label is set to the job_name value of the respective scrape configuration. IONOS SD configurations allows retrieving scrape targets from So now that we understand what the input is for the various relabel_config rules, how do we create one? To allowlist metrics and labels, you should identify a set of core important metrics and labels that youd like to keep. It may be a factor that my environment does not have DNS A or PTR records for the nodes in question. Multiple relabeling steps can be configured per scrape configuration. Azure SD configurations allow retrieving scrape targets from Azure VMs. The extracted string would then be set written out to the target_label and might result in {address="podname:8080}. You can use a relabel_config to filter through and relabel: Youll learn how to do this in the next section. Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. Relabelling. 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 are set to the scheme and metrics path of the target respectively. and exposes their ports as targets. Write relabeling is applied after external labels. You can add additional metric_relabel_configs sections that replace and modify labels here. So without further ado, lets get into it! vmagent can accept metrics in various popular data ingestion protocols, apply relabeling to the accepted metrics (for example, change metric names/labels or drop unneeded metrics) and then forward the relabeled metrics to other remote storage systems, which support Prometheus remote_write protocol (including other vmagent instances). 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. Making statements based on opinion; back them up with references or personal experience. 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. contexts. See below for the configuration options for Kubernetes discovery: See this example Prometheus configuration file See the Prometheus examples of scrape configs for a Kubernetes cluster. my/path/tg_*.json. through the __alerts_path__ label. will periodically check the REST endpoint for currently running tasks and view raw prometheus.yml hosted with by GitHub , Prometheus . which rule files to load. You may wish to check out the 3rd party Prometheus Operator, It's not uncommon for a user to share a Prometheus config with a validrelabel_configs and wonder why it isn't taking effect. 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. One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. relabeling phase. changed with relabeling, as demonstrated in the Prometheus hetzner-sd required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. I see that the node exporter provides the metric node_uname_info that contains the hostname, but how do I extract it from there? for a practical example on how to set up your Marathon app and your Prometheus This is generally useful for blackbox monitoring of a service. This service discovery uses the public IPv4 address by default, by that can be Endpoints are limited to the kube-system namespace. The regex supports parenthesized capture groups which can be referred to later on. A tls_config allows configuring TLS connections. My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. 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. address one target is discovered per port. Below are examples of how to do so. Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. To learn more, please see Regular expression on Wikipedia. See below for the configuration options for Eureka discovery: See the Prometheus eureka-sd configuration file The cn role discovers one target for per compute node (also known as "server" or "global zone") making up the Triton infrastructure. 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. File-based service discovery provides a more generic way to configure static targets 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]. The target address defaults to the private IP address of the network Relabeling is a powerful tool to dynamically rewrite the label set of a target before service is created using the port parameter defined in the SD configuration. Prometheus relabel_configs 4. Each pod of the daemonset will take the config, scrape the metrics, and send them for that node. Or if youre using Prometheus Kubernetes service discovery you might want to drop all targets from your testing or staging namespaces. This relabeling occurs after target selection. port of a container, a single target is generated. Prometheus queries: How to give a default label when it is missing? First, it should be metric_relabel_configs rather than relabel_configs. Targets may be statically configured via the static_configs parameter or by the API. Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end.
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