kubernetes – khaja

What are the 10 feature of kubernetes?

Automated Scheduling
Self-Healing Capabilities
Automated rollouts & rollback
Horizontal Scaling & Load Balancing
Offers environment consistency for development, testing, and production
Infrastructure is loosely coupled to each component can act as a separate unit
Provides a higher density of resource utilization
Offers enterprise-ready features
Application-centric management
Auto-scalable infrastructure
You can create predictable infrastructure

How kubernetes works?

Kubernetes is the Linux kernel which is used for distributed systems. It helps you to be abstract the underlying hardware of the nodes(servers) and offers a consistent interface for applications that consume the shared pool of resources

What are the components of Master? explain in one line sentense

Master Node
The master node is the first and most vital component which is responsible for the management of Kubernetes cluster. It is the entry point for all kind of administrative tasks. There might be more than one master node in the cluster to check for fault tolerance.

The master node has various components like API Server, Controller Manager, Scheduler, and ETCD. Let see all of them.

API Server: The API server acts as an entry point for all the REST commands used for controlling the cluster.

Scheduler
The scheduler schedules the tasks to the slave node. It stores the resource usage information for every slave node. It is responsible for distributing the workload.

It also helps you to track how the working load is used on cluster nodes. It helps you to place the workload on resources which are available and accept the workload.

Etcd
etcd components store configuration detail and wright values. It communicates with the most component to receive commands and work. It also manages network rules and port forwarding activity.

Worker/Slave nodes
Worker nodes are another essential component which contains all the required services to manage the networking between the containers, communicate with the master node, which allows you to assign resources to the scheduled containers.

Kubelet: gets the configuration of a Pod from the API server and ensures that the described containers are up and running.
Docker Container: Docker container runs on each of the worker nodes, which runs the configured pods
Kube-proxy: Kube-proxy acts as a load balancer and network proxy to perform service on a single worker node
Pods: A pod is a combination of single or multiple containers that logically run together on nodes

What are the components of Worker/Node/Agent

Docker:
Docker which helps in running the encapsulated application containers in a relatively isolated but lightweight operating environment.

Kubelet Service:
responsible for relaying information to and from control plane service. It interacts with etcd store to read configuration details and wright values. This communicates with the master component to receive commands and work. The kubelet process then assumes responsibility for maintaining the state of work and the node server. It manages network rules, port forwarding, etc.

Kubernetes Proxy Service:
runs on each node and helps in making services available to the external host. It helps in forwarding the request to correct containers and is capable of performing primitive load balancing. It makes sure that the networking environment is predictable and accessible and at the same time it is isolated as well. It manages pods on node, volumes, secrets, creating new containers’ health checkup, etc.

What are the components of Workstation?

kubectl ,JSON