Main Kubectl Commands

In Kubernetes world we don't create or work with Pods directly, instead we create deployments. Everything below deployment layer is managed by K8s.

Deployment manages a ReplicaSet which manages a Pod which is an abstraction of a Container

• kubectl get <componentName> <name>

  examples: kubectl get pods kubectl get deployments kubectl get replicaset kubectl get service kubectl get logs <podName> kubectl get pod -o wide - output in wide to get more information like IP address of pods kubectl get deployment <deploymentName> -o yaml - get deployment details from etcd and output in yaml format, you can output to a file as well

• kubectl describe <componentName> <name>

  examples: kubectl describe service nginx-service kubectl describe pod nginx-pod

• kubectl edit <componentName> <name>

  examples: kubectl edit deployments nginx-deployment

• kubectl delete <componentName> <name>

  examples: kubectl delete deployment nginx-deployment

• kubectl create <componentName> <name> <options>

  examples: kubectl create deployment nginx-depl --image=nginx

• kubectl exec -it <podName> -- bin/bash - get terminal into pod/container

• kubectl apply -f <file>

  example file:

  yaml apiVersion: apps/v1 kind: Deployment # what I am creating metadata: name: nginx-deployment labels: app: nginx spec: # blueprint/specificaiton for deployment replicas: 1 # number of replicas selector: matchLabels: app: nginx template: # specification for pod metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.16 ports: - containerPort: 80