As we saw before, the following block will set the env label to the replacement provided, so {env="production"} will be added to the labelset. Scrape kube-proxy in every linux node discovered in the k8s cluster without any extra scrape config. The replacement field defaults to just $1, the first captured regex, so its sometimes omitted. and exposes their ports as targets. metadata and a single tag). this functionality. It expects an array of one or more label names, which are used to select the respective label values. The See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful They are set by the service discovery mechanism that provided Note that adding an additional scrape . Prometheus K8SYaml K8S Before applying these techniques, ensure that youre deduplicating any samples sent from high-availability Prometheus clusters. 1Prometheus. The endpoint is queried periodically at the specified refresh interval. Each pod of the daemonset will take the config, scrape the metrics, and send them for that node. will periodically check the REST endpoint and The endpointslice role discovers targets from existing endpointslices. This SD discovers resources and will create a target for each resource returned Remote development environments that secure your source code and sensitive data 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. Some of these special labels available to us are. Python Flask Forms with Jinja Templating , Copyright 2023 - Ruan - Prometheuslabel_replace | by kameneko | penguin-lab | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. Catalog API. To learn how to do this, please see Sending data from multiple high-availability Prometheus instances. However, its usually best to explicitly define these for readability. 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). Relabelling. For Generic placeholders are defined as follows: The other placeholders are specified separately. Docker SD configurations allow retrieving scrape targets from Docker Engine hosts. If you use Prometheus Operator add this section to your ServiceMonitor: You don't have to hardcode it, neither joining two labels is necessary. For a cluster with a large number of nodes and pods and a large volume of metrics to scrape, some of the applicable custom scrape targets can be off-loaded from the single ama-metrics replicaset pod to the ama-metrics daemonset pod. configuration file, this example Prometheus configuration file, the Prometheus hetzner-sd Yes, I know, trust me I don't like either but it's out of my control. [prometheus URL]:9090/targets target endpoint Before relabeling __metrics_path__ label relabel relabel static config Blog | Training | Book | Privacy, relabel_configs vs metric_relabel_configs. will periodically check the REST endpoint for currently running tasks and The tasks role discovers all Swarm tasks discovery mechanism. The private IP address is used by default, but may be changed to the public IP You can extract a samples metric name using the __name__ meta-label. Scrape cAdvisor in every node in the k8s cluster without any extra scrape config. Publishing the application's Docker image to a containe Overview. Azure SD configurations allow retrieving scrape targets from Azure VMs. sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). For users with thousands of Triton SD configurations allow retrieving 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. On the federation endpoint Prometheus can add labels When sending alerts we can alter alerts labels If it finds the instance_ip label, it renames this label to host_ip. Curated sets of important metrics can be found in Mixins. It fetches targets from an HTTP endpoint containing a list of zero or more Connect Grafana to data sources, apps, and more, with Grafana Alerting, Grafana Incident, and Grafana OnCall, Frontend application observability web SDK, Try out and share prebuilt visualizations, Contribute to technical documentation provided by Grafana Labs, Help build the future of open source observability software The PromQL queries that power these dashboards and alerts reference a core set of important observability metrics. If a container has no specified ports, metric_relabel_configs are commonly used to relabel and filter samples before ingestion, and limit the amount of data that gets persisted to storage. This is most commonly used for sharding multiple targets across a fleet of Prometheus instances. Prometheus keeps all other metrics. Additional labels prefixed with __meta_ may be available during the support for filtering instances. To learn more, see our tips on writing great answers. See below for the configuration options for OVHcloud discovery: PuppetDB SD configurations allow retrieving scrape targets from 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. for a detailed example of configuring Prometheus for Docker Swarm. Why is there a voltage on my HDMI and coaxial cables? Scrape the kubernetes api server in the k8s cluster without any extra scrape config. 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. For example, if a Pod backing the Nginx service has two ports, we only scrape the port named web and drop the other. 11 aylei pushed a commit to aylei/docs that referenced this issue on Oct 28, 2019 Update feature description in overview and readme ( prometheus#341) efb2912 A DNS-based service discovery configuration allows specifying a set of DNS filtering nodes (using filters). Vultr SD configurations allow retrieving scrape targets from Vultr. Avoid downtime. can be more efficient to use the Docker API directly which has basic support for *) regex captures the entire label value, replacement references this capture group, $1, when setting the new target_label. service account and place the credential file in one of the expected locations. prefix is guaranteed to never be used by Prometheus itself. When we configured Prometheus to run as a service, we specified the path of /etc/prometheus/prometheus.yml. ), the to filter proxies and user-defined tags. Making statements based on opinion; back them up with references or personal experience. For more information, check out our documentation and read more in the Prometheus documentation. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. To collect all metrics from default targets, in the configmap under default-targets-metrics-keep-list, set minimalingestionprofile to false. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. ec2:DescribeAvailabilityZones permission if you want the availability zone ID May 29, 2017. anchored on both ends. // Config is the top-level configuration for Prometheus's config files. To learn more about remote_write configuration parameters, please see remote_write from the Prometheus docs. Prometheus also provides some internal labels for us. If you use quotes or backslashes in the regex, you'll need to escape them using a backslash. NodeLegacyHostIP, and NodeHostName. To learn more, please see Regular expression on Wikipedia. configuration file. 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. The following meta labels are available on targets during relabeling: See below for the configuration options for Azure discovery: Consul SD configurations allow retrieving scrape targets from Consul's 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. Use the following to filter IN metrics collected for the default targets using regex based filtering. config package - github.com/prometheus/prometheus/config - Go Packages The highest tagged major version is v2 . In other words, its metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels. It reads a set of files containing a list of zero or more The address will be set to the host specified in the ingress spec. To learn more about remote_write, please see remote_write from the official Prometheus docs. However, in some Otherwise the custom configuration will fail validation and won't be applied. yamlyaml. Each instance defines a collection of Prometheus-compatible scrape_configs and remote_write rules. Alert relabeling is applied to alerts before they are sent to the Alertmanager. The resource address is the certname of the resource and can be changed during Labels starting with __ will be removed from the label set after target Let's say you don't want to receive data for the metric node_memory_active_bytes from an instance running at localhost:9100. Each target has a meta label __meta_url during the The Linux Foundation has registered trademarks and uses trademarks. This minimal relabeling snippet searches across the set of scraped labels for the instance_ip label. One of the following roles can be configured to discover targets: The services role discovers all Swarm services Linode APIv4. The relabel_config step will use this number to populate the target_label with the result of the MD5(extracted value) % modulus expression.