What is service discovery in Prometheus?

Prometheus service discovery is a standard method of finding endpoints to scrape for metrics. You configure prometheus. yaml to set up the scraping mechanism. yaml to find the endpoints instead of using those that the agent has found through the use of process_filter rules.

How does Prometheus service discovery work in Kubernetes?

Prometheus supports scraping multiple application instances. Applications that run in orchestrated environments require to be discovered dynamically, since their IP addresses will change. Prometheus can be configured to use the Kubernetes API to discover changes in the list of running instances dynamically.

What is scrape config in Prometheus?

A scrape_config section specifies a set of targets and parameters describing how to scrape them. In the general case, one scrape configuration specifies a single job. In advanced configurations, this may change.

What is Kubernetes_sd_configs?

Lastly, kubernetes_sd_config is the configuration file defines everything related to scraping targets. You can decide in the config file what kind of information you want to gather and from whom.

What is scrape timeout in Prometheus?

Every 5 minutes (scrape_interval) Prometheus will get the metrics from the given URL. It will try 30 seconds (scrape_timeout) to get the metrics if it can’t scrape in this time it will time out.

Why do we need Service Discovery?

In a microservices application, the set of running service instances changes dynamically. Instances have dynamically assigned network locations. Consequently, in order for a client to make a request to a service it must use a service‑discovery mechanism. A key part of service discovery is the service registry.

What do containers share inside a pod?

Within a Pod, containers share an IP address and port space, and can find each other via localhost. The containers in a Pod can also communicate with each other using standard inter-process communications like SystemV semaphores or POSIX shared memory.

Is Prometheus better than Zabbix?

Zabbix is written in C and PHP, it’s more classic-monitoring. Prometheus is written in Go, it’s recommended for Cloud, SaaS/openstack monitoring. BUT you can use both, Prometheus is faster because of the database zabbix has a smaller footprint(because its written in c).

What is node exporter?

Node Exporter is a Prometheus exporter for server level and OS level metrics with configurable metric collectors. It helps us in measuring various server resources such as RAM, disk space, and CPU utilization.

What is job label?

The job label is one of the labels your targets will always have. So how can you use it? The job label is special as if after target relabelling if there is no job label present on a target, then the value of the job_name field will be used. In this way your targets will always have a job label.

What is cAdvisor?

cAdvisor ( Container Advisor ) provides container users an understanding of the resource usage and performance characteristics of their running containers. It is a running daemon that collects aggregates processes and exports information about running containers.

What is Scrape_interval?

Scraping, Evaluation and Alerting Prometheus scrape metrics from monitored targets at regular intervals, defined by the scrape_interval (defaults to 1m ). The scrape interval can be configured globally, and then overriden per job. Scraped metrics are then stored persistently on its local storage.

What is job name in Prometheus?

In Prometheus terms, an endpoint you can scrape is called an instance, usually corresponding to a single process. A collection of instances with the same purpose, a process replicated for scalability or reliability for example, is called a job.

How do you add an endpoint in Prometheus?

Stop Prometheus, and then update the Prometheus configuration file to use Alertmanager.

  1. On the monitoring server, open the Prometheus configuration file.
  2. Add the Alertmanager endpoint.
  3. Add the Grafana endpoint.
  4. Restart Prometheus.
  5. Ensure all three endpoints are listed on the Targets page.

How do I start Prometheus service?

Prometheus Exporter Setup

  1. Step 1: Download The Binary File And Start Node Exporter:
  2. Step 2: Let’s Run Node Exporter As Service:
  3. Step3: You Are Set With Node Exporter.
  4. Step 4: Here’s The Command To Execute Prometheus:
  5. Step 5: Run This Code.
  6. Step 6: Visiting Localhost:9090 Again.

What is Prometheus service monitor?

Prometheus is an open source monitoring and alerting toolkit originally developed by SoundCloud in 2012. Since then, the platform has attracted a vibrant developer and user community. Prometheus is now closely integrated into cloud-native ecosystem and has native support for containers and Kubernetes.

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