Some of my K8 learnings and exam preparation. Anypne preparing for exam, would recoment Udemy cource by Mumshad.
- Samples : Basic K8 templates, ideal for starter and exam practice
- Vagrant. : Vagrant Kubernetes environment. (Not sure who wrote it, it works)
- Mycompany : Helm chart2 sample charts with configmaps
Kubectl auto complete
alias k=kubectl; complete -F __start_kubectl
- Get current context
k config current-context - Set context and namespace
k config set-context newcontext --namespace=newns - View current configuration
k config view - Read config from a file
k config view --kubeconfig=/newconf.txt
Make use of --dry-run and -o yaml, sometimes easier to edit yaml and apply it.
Create simple pod running Nginx
k run nginx --image=nginx --restart=Never --dry-run -o yaml
--restart=Alyays Creates Deployment
--restart=OnFailure Creates a Job
Create Deployment with 4 replicas
k create deploy deploy1 --image=nginx --dry-run -o yaml
k scale --replicas=4 deploy/deploy1
Create Service to expose Deploy1 running port 80, on NodePort=32005
NodePort cannot be specified at command prompt, edit Yaml add nodePort then apply. Or use k create and add matching labels for your deployment.
k expose deploy deploy1 --name=deploy-service --type=NodePort --port=80 --dry-run -o yaml
Edit yaml and add "nodePort=32005" in ports section and apply config.