2/13/2018 - 10:25 PM

Kubernetes Getting Started

Getting Started with Kubernetes

# Install KubeCtl
brew install kubectl

# Starting Minikube
minikube start

# Run Hello World
kubectl run hello-world --replicas=2 \
  --labels="run=load-balancer-example" \  \

# Get Deployments
kubectl get deployments hello-world

# Describe Deployments
kubectl describe deployments hello-world

# Expose Service
kubectl expose deployment hello-world --type=NodePort --name=example-service

# Describe Services
kubectl describe services example-service
kubectl describe svc example-service

# Delete Pods
kubectl delete pods <podname>

# Running Kubernetes Pod
kubectl run <PodName> --image=<image_name> -l app=appName,env=prod,version=1.0 -r 2

# Delete Pod
kubectl delete pod <podName>

# Get Deployment Information
kubectl get deployments

# Applying KubeCtl Applying Resource Configuration
kubectl apply -f <file1> -f <file2>

# Scale Deployments
kubeclt scale deployment guestbook-service --replica=1

# Executing commands on K8 Pods
kubectl exec <podname> -- <command>

# Get a Shell to a Running Container
kubectl exec --stdin --tty <podname> -- /bin/sh
# Kubernetes Configs

# Get Kubernetes Contexts
kubectl config get-contexts

# Display the current Context
kubectl config current-context

# Set the Default Context to <context-name>
kubectl config use-context <context-name>


# Viewing, Finding Resources

$ kubectl get pods
$ kubectl get pods --all-namespaces             # List all pods in all namespaces
$ kubectl get deployment my-dep                 # List a particular deployment

# Describe with Verbose Output
$ kubectl describe pods my-pod

# Interacting with Pods
$ kubectl logs my-pod                                 # dump pod logs (stdout)
$ kubectl logs -f my-pod                              # stream pod logs (stdout)
$ kubectl attach my-pod -i                            # Attach to Running Container
$ kubectl exec my-pod -- ls /                         # Run command in existing pod (1 container case)

Run interactive commands

kubectl run -i --tty busybox --image=busybox --restart=Never -- sh

View Pod's Logs

kubectl logs -f <podname>

Attach to existing Container

kubectl attach redis -i

Forward ports from Pods to your local machine

kubectl port-forward redis-izl09 6379

Execute commands inside an existing container

kubectl exec redis-izl09 -- ls /

Add or remove Labels

kubectl label pods redis-izl09 mylabel=awesome