Kubernetes Metrics Server

1. What is Kubernetes metrics server?
2. How do I check my metrics server for Kubernetes?
3. How do I access metrics server?
4. How do I enable metrics in Kubernetes?
5. What is Heapster in Kubernetes?
6. What is Kubernetes pipeline?
7. How do I upgrade metrics server in Kubernetes?
8. What is Prometheus server?
9. How do I monitor Kubernetes nodes?
10. How does Kubernetes detect CPU and memory utilization?

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 check my metrics server for Kubernetes?

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 access metrics server?

Metrics API can also be accessed by using the kubectl top command. This makes it easier to debug autoscaling pipelines. $ kubectl top --help Display Resource (CPU/Memory/Storage) usage. The top command allows you to see the resource consumption for nodes or pods.

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.

What is Heapster in Kubernetes?

Heapster is a cluster-wide aggregator of monitoring and event data. ... Heapster runs as a pod in the cluster, similar to how any Kubernetes application would run. The Heapster pod discovers all nodes in the cluster and queries usage information from the nodes' Kubelets, the on-machine Kubernetes agent.

What is Kubernetes pipeline?

These are the components that make up a Continuous Delivery (CD) pipeline: Version Control System – a source code repository where changes and updates are pushed. CI system – an integration and test system that may also build the Docker image. Docker Registry – the image registry that stores your Docker images.

How do I upgrade metrics server in Kubernetes?

Please add --set args="--kubelet-insecure-tls=true" argument to the helm install command that follows.

1. helm repo update.
2. kubectl create namespace metrics.
3. helm install metrics-server \
4. stable/metrics-server \
5. --version 2.0. 2 \
6. --namespace metrics.
7. kubectl -n metrics \
8. rollout status \

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 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.