kubernetes install metrics-server

1. How do I install metrics server on Kubernetes?
2. How do I know if I have Kubernetes metrics server?
3. How do I enable metrics in Kubernetes?
4. How do I install Kube state metrics?
5. What are Kubernetes metrics?
6. What is Kubernetes metrics server?
7. How do I enable metrics on my server?
8. How do I monitor Kubernetes nodes?
9. How does Kubernetes detect CPU and memory utilization?
10. What is the use of Kube-state-metrics?
11. What is Container_cpu_usage_seconds_total?
12. How do you collect performance metrics?
13. What is DaemonSet?
14. What is cAdvisor?

How do I install metrics server on Kubernetes?

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 I know if I have Kubernetes metrics server?

View metric snapshots using kubectl top

Once Metrics Server is deployed, you can retrieve compact metric snapshots from the Metrics API using kubectl top . The kubectl top command returns current CPU and memory usage for a cluster's pods or nodes, or for a particular pod or node if specified.

How do I enable metrics in Kubernetes?

Metrics in Kubernetes

In most cases metrics are available on /metrics endpoint of the HTTP server. For components that doesn't expose endpoint by default it can be enabled using --bind-address flag.

How do I install 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.

What are Kubernetes metrics?

metrics-server discovers all nodes on the cluster and queries each node's kubelet for CPU and memory usage. The kubelet acts as a bridge between the Kubernetes master and the nodes, managing the pods and containers running on a machine.

What is Kubernetes metrics server?

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.

How do I enable metrics on my server?

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 monitor Kubernetes nodes?

Here are the most popular and most reliable open-source monitoring tools you can choose from when working with Kubernetes.

1. Kubelet. ...
2. Container Advisor (cAdvisor) ...
3. Kube-state-metrics. ...
4. Kubernetes Dashboard. ...
5. Prometheus. ...
6. Jaeger. ...
7. Kubewatch. ...
8. Weave Scope.

How does Kubernetes detect CPU and memory utilization?

If you want to check pods cpu/memory usage without installing any third party tool then you can get memory and cpu usage of pod from cgroup.

1. Go to pod's exec mode kubectl exec pod_name -- /bin/bash.
2. Go to cd /sys/fs/cgroup/cpu for cpu usage run cat cpuacct.usage.

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 Container_cpu_usage_seconds_total?

cadvisor provides a metric named “container_cpu_usage_seconds_total” which is of a metric type: Counter. ... As we know, the rate function “calculates the per-second average rate of increase of the time series in the range vector”.

How do you collect performance metrics?

In this article, we cover some of our most important application performance metrics you should be tracking.
...
Key Application Performance Metrics

1. User Satisfaction / Apdex Scores. ...
2. Average Response Time. ...
3. Error Rates. ...
4. Count of Application Instances. ...
5. Request Rate. ...
6. Application & Server CPU. ...
7. Application Availability.

What is DaemonSet?

A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. As nodes are added to the cluster, Pods are added to them. As nodes are removed from the cluster, those Pods are garbage collected. Deleting a DaemonSet will clean up the Pods it created.

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.