Hetzner Cloud API and tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. Find centralized, trusted content and collaborate around the technologies you use most. You can use a relabel_config to filter through and relabel: Youll learn how to do this in the next section. The resource address is the certname of the resource and can be changed during defined by the scheme described below. Lightsail SD configurations allow retrieving scrape targets from AWS Lightsail For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. Finally, this configures authentication credentials and the remote_write queue. instance. is not well-formed, the changes will not be applied. 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. The cn role discovers one target for per compute node (also known as "server" or "global zone") making up the Triton infrastructure. Labels are sets of key-value pairs that allow us to characterize and organize whats actually being measured in a Prometheus metric. metric_relabel_configs relabel_configsreplace Prometheus K8S . If a service has no published ports, a target per instance it is running on should have at least read-only permissions to the 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. The relabeling phase is the preferred and more powerful rev2023.3.3.43278. metadata and a single tag). One source of confusion around relabeling rules is that they can be found in multiple parts of a Prometheus config file. Choosing which metrics and samples to scrape, store, and ship to Grafana Cloud can seem quite daunting at first. Since the (. 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. A DNS-based service discovery configuration allows specifying a set of DNS Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. service is created using the port parameter defined in the SD configuration. which automates the Prometheus setup on top of Kubernetes. Please find below an example from other exporter (blackbox), but same logic applies for node exporter as well. It reads a set of files containing a list of zero or more This reduced set of targets corresponds to Kubelet https-metrics scrape endpoints. Refresh the page, check Medium 's site status,. It uses the $NODE_IP environment variable, which is already set for every ama-metrics addon container to target a specific port on the node: Custom scrape targets can follow the same format using static_configs with targets using the $NODE_IP environment variable and specifying the port to scrape. For redis we use targets like described in, Relabel instance to hostname in Prometheus, groups.google.com/forum/#!topic/prometheus-developers/, github.com/oliver006/redis_exporter/issues/623, https://stackoverflow.com/a/64623786/2043385, How Intuit democratizes AI development across teams through reusability. A static config has a list of static targets and any extra labels to add to them. would result in capturing whats before and after the @ symbol, swapping them around, and separating them with a slash. config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . s. external labels send identical alerts. Follow the instructions to create, validate, and apply the configmap for your cluster. OAuth 2.0 authentication using the client credentials grant type. Grafana Labs uses cookies for the normal operation of this website. Alert relabeling is applied to alerts before they are sent to the Alertmanager. You can use a relabel rule like this one in your prometheus job desription: In the prometheus Service Discovery you can first check the correct name of your label. When metrics come from another system they often don't have labels. As an example, consider the following two metrics. way to filter containers. Making statements based on opinion; back them up with references or personal experience. The following meta labels are available for each target: See below for the configuration options for Kuma MonitoringAssignment discovery: The relabeling phase is the preferred and more powerful way So the solution I used is to combine an existing value containing what we want (the hostnmame) with a metric from the node exporter. To learn more, please see Regular expression on Wikipedia. The currently supported methods of target discovery for a scrape config are either static_configs or kubernetes_sd_configs for specifying or discovering targets. 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. Prometheus Cheatsheets My Cheatsheet Repository View on GitHub Prometheus Cheatsheets. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels Sorry, an error occurred. Additional config for this answer: 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. relabeling phase. . 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. The scrape intervals have to be set by customer in the correct format specified here, else the default value of 30 seconds will be applied to the corresponding targets. We've looked at the full Life of a Label. What if I have many targets in a job, and want a different target_label for each one? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The replace action is most useful when you combine it with other fields. With a (partial) config that looks like this, I was able to achieve the desired result. and applied immediately. node object in the address type order of NodeInternalIP, NodeExternalIP, Below are examples showing ways to use relabel_configs. To learn how to discover high-cardinality metrics, please see Analyzing Prometheus metric usage. Where may be a path ending in .json, .yml or .yaml. is it query? The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. When we configured Prometheus to run as a service, we specified the path of /etc/prometheus/prometheus.yml. Kubernetes' REST API and always staying synchronized with One use for this is ensuring a HA pair of Prometheus servers with different The HTTP header Content-Type must be application/json, and the body must be *) 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. first NICs IP address by default, but that can be changed with relabeling. Heres an example. it was not set during relabeling. The HAProxy metrics have been discovered by Prometheus. To specify which configuration file to load, use the --config.file flag. Note that exemplar storage is still considered experimental and must be enabled via --enable-feature=exemplar-storage. directly which has basic support for filtering nodes (currently by node See below for the configuration options for Lightsail discovery: Linode SD configurations allow retrieving scrape targets from Linode's Whats the grammar of "For those whose stories they are"? 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: And what can they actually be used for? For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. The above snippet will concatenate the values stored in __meta_kubernetes_pod_name and __meta_kubernetes_pod_container_port_number. The __* labels are dropped after discovering the targets. // Config is the top-level configuration for Prometheus's config files. integrations with this The label will end with '.pod_node_name'. To enable denylisting in Prometheus, use the drop and labeldrop actions with any relabeling configuration. configuration file, the Prometheus linode-sd metric_relabel_configsmetric . still uniquely labeled once the labels are removed. - Key: Name, Value: pdn-server-1 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. Yes, I know, trust me I don't like either but it's out of my control. Sign up for free now! We drop all ports that arent named web. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. Using metric_relabel_configs, you can drastically reduce your Prometheus metrics usage by throwing out unneeded samples. The first relabeling rule adds {__keep="yes"} label to metrics with mountpoint matching the given regex. Heres a small list of common use cases for relabeling, and where the appropriate place is for adding relabeling steps. PrometheusGrafana. Posted by Ruan are set to the scheme and metrics path of the target respectively. could be used to limit which samples are sent. configuration file. The global configuration specifies parameters that are valid in all other configuration Scrape coredns service in the k8s cluster without any extra scrape config. See below for the configuration options for Marathon discovery: By default every app listed in Marathon will be scraped by Prometheus. See below for the configuration options for OpenStack discovery: OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS using Use the following to filter IN metrics collected for the default targets using regex based filtering. Prometheus needs to know what to scrape, and that's where service discovery and relabel_configs come in. There is a small demo of how to use Nerve SD configurations allow retrieving scrape targets from AirBnB's Nerve which are stored in To learn more about them, please see Prometheus Monitoring Mixins. There is a list of refresh failures. Overview. configuration file. relabel_configsmetric_relabel_configssource_labels CC 4.0 BY-SA instances, as well as configuration file, the Prometheus marathon-sd configuration file, the Prometheus eureka-sd configuration file, the Prometheus scaleway-sd 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). For non-list parameters the Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. address referenced in the endpointslice object one target is discovered. If a task has no published ports, a target per task is This service discovery uses the public IPv4 address by default, but that can be Does Counterspell prevent from any further spells being cast on a given turn? compute resources. filepath from which the target was extracted. So if you want to say scrape this type of machine but not that one, use relabel_configs. Sorry, an error occurred. In your case please just include the list items where: Another answer is to using some /etc/hosts or local dns (Maybe dnsmasq) or sth like Service Discovery (by Consul or file_sd) and then remove ports like this: group_left unfortunately is more of a limited workaround than a solution. instances it can be more efficient to use the EC2 API directly which has If the endpoint is backed by a pod, all ec2:DescribeAvailabilityZones permission if you want the availability zone ID My target configuration was via IP addresses (, it should work with hostnames and ips, since the replacement regex would split at. Eureka REST API. yamlyaml. One of the following role types can be configured to discover targets: The node role discovers one target per cluster node with the address defaulting After relabeling, the instance label is set to the value of __address__ by default if can be more efficient to use the Docker API directly which has basic support for Kuma SD configurations allow retrieving scrape target from the Kuma control plane. This SD discovers "monitoring assignments" based on Kuma Dataplane Proxies, This set of targets consists of one or more Pods that have one or more defined ports. Asking for help, clarification, or responding to other answers. This can be Step 2: Scrape Prometheus sources and import metrics. To summarize, the above snippet fetches all endpoints in the default Namespace, and keeps as scrape targets those whose corresponding Service has an app=nginx label set. If the extracted value matches the given regex, then replacement gets populated by performing a regex replace and utilizing any previously defined capture groups. 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. discover scrape targets, and may optionally have the for a practical example on how to set up your Eureka app and your Prometheus The private IP address is used by default, but may be changed to You can place all the logic in the targets section using some separator - I used @ and then process it with regex. In the previous example, we may not be interested in keeping track of specific subsystems labels anymore. It may be a factor that my environment does not have DNS A or PTR records for the nodes in question. 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 - ip-192-168-64-30.multipass:9100. Finally, use write_relabel_configs in a remote_write configuration to select which series and labels to ship to remote storage. NodeLegacyHostIP, and NodeHostName. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. The ama-metrics-prometheus-config-node configmap, similar to the regular configmap, can be created to have static scrape configs on each node. Curated sets of important metrics can be found in Mixins. A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order they're defined in. If you're currently using Azure Monitor Container Insights Prometheus scraping with the setting monitor_kubernetes_pods = true, adding this job to your custom config will allow you to scrape the same pods and metrics. Below are examples of how to do so. However, its usually best to explicitly define these for readability. If a relabeling step needs to store a label value only temporarily (as the 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. This is often resolved by using metric_relabel_configs instead (the reverse has also happened, but it's far less common). configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd The regex is may contain a single * that matches any character sequence, e.g. Relabel configs allow you to select which targets you want scraped, and what the target labels will be. 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. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd They also serve as defaults for other configuration sections. Configuration file To specify which configuration file to load, use the --config.file flag. The address will be set to the host specified in the ingress spec. It also provides parameters to configure how to Relabeling and filtering at this stage modifies or drops samples before Prometheus ships them to remote storage. See the Debug Mode section in Troubleshoot collection of Prometheus metrics for more details. An example might make this clearer. to the remote endpoint. The fastest way to get started is with Grafana Cloud, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, & more. Multiple relabeling steps can be configured per scrape configuration. Finally, the modulus field expects a positive integer. Finally, the write_relabel_configs block applies relabeling rules to the data just before its sent to a remote endpoint. to He Wu, Prometheus Users The `relabel_config` is applied to labels on the discovered scrape targets, while `metrics_relabel_config` is applied to metrics collected from scrape targets.. feature to replace the special __address__ label. - Key: Environment, Value: dev. See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful Only alphanumeric characters are allowed. 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 relabel_configstargetmetric_relabel_configs relabel_configs drop relabel_configs: - source_labels: [__meta_ec2_tag_Name] regex: Example. 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 *), so if not specified, it will match the entire input. These are: A Prometheus configuration may contain an array of relabeling steps; they are applied to the label set in the order theyre defined in. For now, Prometheus Operator adds following labels automatically: endpoint, instance, namespace, pod, and service. 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. the public IP address with relabeling. The __scrape_interval__ and __scrape_timeout__ labels are set to the target's The relabel_configs section is applied at the time of target discovery and applies to each target for the job. Prometheus metric_relabel_configs . In those cases, you can use the relabel 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. You can also manipulate, transform, and rename series labels using relabel_config. metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. 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. In other words, its metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels. The address will be set to the Kubernetes DNS name of the service and respective So if you want to say scrape this type of machine but not that one, use relabel_configs. This piece of remote_write configuration sets the remote endpoint to which Prometheus will push samples. 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. Relabeling relabeling Prometheus Relabel Prometheus also provides some internal labels for us. 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. You can't relabel with a nonexistent value in the request, you are limited to the different parameters that you gave to Prometheus or those that exists in the module use for the request (gcp,aws). Consul setups, the relevant address is in __meta_consul_service_address. Hetzner SD configurations allow retrieving scrape targets from It does so by replacing the labels for scraped data by regexes with relabel_configs. See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful 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. configuration file. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. 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.