They allow us to filter the targets returned by our SD mechanism, as well as manipulate the labels it sets. The scrape config should only target a single node and shouldn't use service discovery. This service discovery uses the public IPv4 address by default, but that can be Tracing is currently an experimental feature and could change in the future. After changing the file, the prometheus service will need to be restarted to pickup the changes. The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. Tags: prometheus, relabelling. Prometheus keeps all other metrics. Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. is it query? For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. way to filter services or nodes for a service based on arbitrary labels. A static_config allows specifying a list of targets and a common label set It is very useful if you monitor applications (redis, mongo, any other exporter, etc. Kuma SD configurations allow retrieving scrape target from the Kuma control plane. This will also reload any configured rule files. The Linux Foundation has registered trademarks and uses trademarks. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels If running outside of GCE make sure to create an appropriate metric_relabel_configs by contrast are applied after the scrape has happened, but before the data is ingested by the storage system. for a detailed example of configuring Prometheus with PuppetDB. 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 . 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. Serversets are commonly dynamically discovered using one of the supported service-discovery mechanisms. It is the canonical way to specify static targets in a scrape 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. instances. node_uname_info{nodename} -> instance -- I get a syntax error at startup. 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 is not well-formed, the changes will not be applied. Allowlisting or keeping the set of metrics referenced in a Mixins alerting rules and dashboards can form a solid foundation from which to build a complete set of observability metrics to scrape and store. PuppetDB resources. How to use Slater Type Orbitals as a basis functions in matrix method correctly? changed with relabeling, as demonstrated in the Prometheus scaleway-sd Next I tried metrics_relabel_configs but that doesn't seem to want to copy a label from a different metric, ie. To update the scrape interval settings for any target, the customer can update the duration in default-targets-scrape-interval-settings setting for that target in ama-metrics-settings-configmap configmap. I'm working on file-based service discovery from a DB dump that will be able to write these targets out. If a relabeling step needs to store a label value only temporarily (as the Files may be provided in YAML or JSON format. the command-line flags configure immutable system parameters (such as storage The HAProxy metrics have been discovered by Prometheus. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. - ip-192-168-64-30.multipass:9100. For OVHcloud's public cloud instances you can use the openstacksdconfig. So let's shine some light on these two configuration options. feature to replace the special __address__ label. 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. 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. refresh interval. instances, as well as Before applying these techniques, ensure that youre deduplicating any samples sent from high-availability Prometheus clusters. instance it is running on should have at least read-only permissions to the relabeling phase. configuration file. integrations with this You can extract a samples metric name using the __name__ meta-label. For users with thousands of tasks it DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean's The pod role discovers all pods and exposes their containers as targets. This is a quick demonstration on how to use prometheus relabel configs, when you have scenarios for when example, you want to use a part of your hostname and assign it to a prometheus label. To do this, use a relabel_config object in the write_relabel_configs subsection of the remote_write section of your Prometheus config. Below are examples showing ways to use relabel_configs. Vultr SD configurations allow retrieving scrape targets from Vultr. We have a generous free forever tier and plans for every use case. in the following places, preferring the first location found: If Prometheus is running within GCE, the service account associated with the source_labels and separator Let's start off with source_labels. Python Flask Forms with Jinja Templating , Copyright 2023 - Ruan - Use the metric_relabel_configs section to filter metrics after scraping. This is a quick demonstration on how to use prometheus relabel configs, when you have scenarios for when example, you want to use a part of your hostname and assign it to a prometheus label. This article provides instructions on customizing metrics scraping for a Kubernetes cluster with the metrics addon in Azure Monitor. If were using Prometheus Kubernetes SD, our targets would temporarily expose some labels such as: Labels starting with double underscores will be removed by Prometheus after relabeling steps are applied, so we can use labelmap to preserve them by mapping them to a different name. Let's focus on one of the most common confusions around relabelling. So if you want to say scrape this type of machine but not that one, use relabel_configs. This SD discovers "monitoring assignments" based on Kuma Dataplane Proxies, relabeling. It expects an array of one or more label names, which are used to select the respective label values. input to a subsequent relabeling step), use the __tmp label name prefix. 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. could be used to limit which samples are sent. Since the (. But what about metrics with no labels? This may be changed with relabeling. 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. to filter proxies and user-defined tags. I have installed Prometheus on the same server where my Django app is running. 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. Robot API. See this example Prometheus configuration file Marathon SD configurations allow retrieving scrape targets using the To learn more about remote_write, please see remote_write from the official Prometheus docs. Much of the content here also applies to Grafana Agent users. 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. 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. Publishing the application's Docker image to a containe Hetzner SD configurations allow retrieving scrape targets from address one target is discovered per port. 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. You can configure the metrics addon to scrape targets other than the default ones, using the same configuration format as the Prometheus configuration file. relabeling phase. prometheus.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To learn more about the general format for a relabel_config block, please see relabel_config from the Prometheus docs. In this case Prometheus would drop a metric like container_network_tcp_usage_total(. The address will be set to the Kubernetes DNS name of the service and respective [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. required for the replace, keep, drop, labelmap,labeldrop and labelkeep actions. Since kubernetes_sd_configs will also add any other Pod ports as scrape targets (with role: endpoints), we need to filter these out using the __meta_kubernetes_endpoint_port_name relabel config. s. I'm not sure if that's helpful. the target and vary between mechanisms. Finally, this configures authentication credentials and the remote_write queue. This solution stores data at scrape-time with the desired labels, no need for funny PromQL queries or hardcoded hacks. They are applied to the label set of each target in order of their appearance target and its labels before scraping. 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.
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