kube-state-metrics vs metrics-server

Metrics Server exposes statistics about the resource utilization of Kubernetes objects, whereas kube-state-metrics listens to the Kubernetes API and generates metrics about the state of Kubernetes objects: node status, node capacity (CPU and memory), number of desired/available/unavailable/updated replicas per ...

1. What is the use of Kube-state-metrics?
2. What is metrics server in Kubernetes?
3. Does Prometheus use metrics server?
4. How do I enable metrics server in Kubernetes?
5. How do I enable Kube-state-metrics?
6. How do you use a metric server?
7. How do you get Kubelet metrics?
8. Where are Kubernetes metrics stored?
9. What is Prometheus server?
10. How do I get Prometheus metrics?
11. How do you write Prometheus metrics?
12. What is cAdvisor?

What is the use of Kube-state-metrics?

Kube-state-metrics is an add-on agent that listens to the Kubernetes API server. It generates metrics about the state of the Kubernetes objects inside the cluster like deployments, replica sets, nodes, and pods.

What is metrics server in Kubernetes?

The Kubernetes Metrics Server is a cluster-wide aggregator of resource usage data. The Kubernetes Metrics Server collects resource metrics from the kubelet running on each worker node and exposes them in the Kubernetes API server through the Kubernetes Metrics API.

Does Prometheus use metrics server?

Prometheus collects metrics from targets by scraping metrics HTTP endpoints. Since Prometheus exposes data in the same manner about itself, it can also scrape and monitor its own health. For a complete specification of configuration options, see the configuration documentation.

How do I enable metrics server in Kubernetes?

Enabling Metrics Server in Docker Desktop

1. Clone or download the Metrics Server project.
2. Open the deploy/kubernetes/metrics-server-deployment. ...
3. Add the –kubelet-insecure-tls argument into the existing args section. ...
4. Run the following command as shown on the Metrics Server repo to create the deployment, services, etc.

How do I enable Kube-state-metrics?

You can also find same deployment object in the official repo as well.

1. Step 1: Clone the Github repo git clone https://github.com/devopscube/kube-state-metrics-configs.git.
2. Step 2: Create all the objects by pointing to the cloned directory. ...
3. Step 3: Check the deployment status using the following command.

How do you use a metric server?

kubectl apply step sets an apiservice named v1beta1.metrics.k8s.io, creates a deployment named metrics-server and configures a service for the deployment. Lastly you can call the apiservice via kubectl; for example this should return basic node metrics: $ kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes" |jq .

How do you get Kubelet metrics?

In order to track Kubelet in Sysdig monitor, you have to add some sections to the agent yaml configuration file. Then, you configure how the Sysdig agent will scrape the metrics, searching the system for processes called kubelet and scraping in localhost through port 10255.

Where are Kubernetes metrics stored?

Metrics in Kubernetes

In most cases metrics are available on /metrics endpoint of the HTTP server.

What is Prometheus server?

Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. ... It is now a standalone open source project and maintained independently of any company.

How do I get Prometheus metrics?

Prometheus expects metrics to be available on targets on a path of /metrics . So this default job is scraping via the URL: http://localhost:9090/metrics. The time series data returned will detail the state and performance of the Prometheus server.

How do you write Prometheus metrics?

On the other hand, the Prometheus metric format takes a flat approach to naming metrics. Instead of a hierarchical, dot separated name, you have a name combined with a series of labels or tags: <metric name><label name>=<label value>, ...

What is cAdvisor?

cAdvisor (short for container Advisor) analyzes and exposes resource usage and performance data from running containers. cAdvisor exposes Prometheus metrics out of the box.