Kubernetes

Terms

Cluster: a set of nodes.

Node:  a virtual machine(VM) or physical machine. 

Master node: managing working workers.

Worker node: running applications.

Pod: a pod is the smallest deployable unit in K8s and not containers. A pod enclose containers and volumes(used for sharing data among containers). A pod has a unique IP address. 

Run K8 locally

Minikube:  installing docker + minikube

Kubectl

K8 command line tool,  providing commands to gain your cluster residing in the minikube

then we may deploy, inspect, edit resources, debug, and view logs.

minikube start > start the k8

kubectl get nodes> showing all nodes running in the k8

kubectl get pods -A > showing all pods in all namespaces

creating k8 deployment.yml VC.

kubectl apply -f deployment.yml

kubectl get svc>  get service(defined in deployment YAML file service section)

minikube service myapp : access service port

start tunnel for service myapp via URL