Its a open source container orchestration tool designed to automate, deploying, scaling and operating containerized applications. Its a distributed system. Can use different container runtimes.

1. Declarative configurations
2. Deploy Containers
3. Wire up networks
4. Expose and scale services
5. Atuomated deployment rollout and roolback
6. RBAC
7. Persistent volume management
8. Seamless horizontal scalling
9. Supports Linux & Windows Clusters

• Clusters
• Nodes (master & worker)
• Pods
• Services
• Deployments

1. DC/OS
2. Amazon ECS
3. Docker Swarm Mode

• Docker Desktop
• Minikube
• kubeadm

• Its a container orchestration tool
• Composed of group of Nodes
• Conatiners run in a Pod
• Nodes are machine in clustres
• Control plane run's on master node and schedules containers on thde nodes
• Pod can have one or more containers
• K8s service exposes Pods to Cluster and outside them

kubectl get pods -n default

kubectl run redis --image=redis -l name=ninad --port 8080

kubectl create deploy nginx-deploy --image=redis --replicas=5 -n development

kubectl get configmaps kubectl create configmap webapp-config-map --from-literal=APP_COLOR=darkblue

kubectl get secrets kubectl describe secret kubectl create secret generic some-secret --from-literal=SOME_VAR=SomeTopSecret --from-literal=ANOTHER_VAR=SomeAnotherValue

kubectl get pod pod-name -o yaml > pod-definition.yaml

kubectl explain pods --recursive kubectl explain pods --recursive | less kubectl explain pods --recursive | grep -A10 envFrom

kubectl get pv pvc

1. Sidecar pattern
2. Ambassador pattern
3. Adapter pattern

kubectl completion --help

Enable: source < (kubectl completion bash) echo "source < (kubectl completion bash)" >> ~/.bash_profile

Press tab or press tab twice

kubectl

kubectl get nodes

pods = po

--sort-by='{.metadata.creationTimestamp}'

kubectl create namespace tricks -o yaml --dry-run

kubectl get pod -n app -o yaml --export | wcl -l

• https://kubernetes.io/docs/home/
• https://www.cncf.io/certification/ckad/