kubernetes-cheatsheet.txt

-----------------------
Kubernetes
-----------------------	

	- Notes:
	
		- Object Types
			- Pods
			- Deployments
			- Services
				- ClusterIP
				- NodePort
					- Only for development
				- LoadBalancer
				- Ingress
			- Secrets	
		
	
	- kubectl
		
		- Check version
			kubectl version
			
		- Cluster Info
			kubectl cluster-info

        - Namespace:
            https://cloud.google.com/blog/products/containers-kubernetes/kubernetes-best-practices-organizing-with-namespaces

            Create:
                kubectl create namespace <namespace>

            Switch namespace:
                kubectl config set-context --current --namespace=<namespace>
                kubectl config set-context --current --namespace=default

            Delete:
                kubectl delete namespace <namespace>


		- Apply Objectinto K8s
			Generically provide k8s responsibilities
			
			kubectl apply -f <configfile.yaml> [--namespace=<namespace>]
			kubectl apply -f <directory>    [--namespace=<namespace>]
			
		- List object status
			kubectl get pods|services
			kubectl get pods -o wide
			
		- List machines/nodes in k8s cluster
			kubectl get node
			
		- List docker status
			kubectl get po -A
			
		- Check objects
			kubectl describe <object_type> <name>
			
		- Delete object
			kubectl delete -f <configfile.yaml>
			
		- Delete deployment and services:
			kubectl delete deployment <name>
			kubectl delete service <name>

        - Delete all object at once
            kubectl delete all --all
            kubectl delete all --all -n <namespace>

            Or create/delete everything under a namespace
                kubectl delete namespace <namespace>
                kubectl create namespace <namespace>
			
		- Logs
			kubectl logs <pod_name>
			
		- Shh
			kubectl exec -it <pod_name> bash
			
		- Imperative Commands
			
			- Update container image
				kubectl set image <object_type>/<object_name> <container_name>=<image_name>
			
				kubectl set image deployment/client-deployment client=gagan144/udemy_complex_client:1.0.6
			
			
		- Get storage
			kubectl get storageclass
			kubectl describe storageclass
			
		- List persistent volumes claims
			kubectl get pvc
			
		- List persistent volumes
			kubectl get pv
			
		- Get PV details (Path on HHD)
			kubectl describe pv <name>
			
			
		- Create secret:
			kubectl create secret <secret_type:generic|docker-reg|tls> <name> --from-literal <key>=<value>
			
		- List secrets
			kubectl get secrets
			kubectl get secret -n <namespace>
			
		- Ingress	
			- Get ingress pods
				kubectl get pods -n ingress-nginx

            - Get ingress services:
                kubectl get services -n ingress-nginx
				
			- Describe
				kubectl describe ingress ingress-service