k8s_course_notes

Docker Best Practices

aggregate multiple run commands together to reduce number of layers needed.
docker add allows download from the Internet + uncompress from tar + docker copy. Use docker copy in general.
avoid tagging latest because it doesn't get auto-updated. Tag with a version number.
for security, useradd -ms a privileged user in Dockerfile (avoiding running container as the root).
docker-compose build re-builds docker image as opposed to docker-compose up.

kubectl apply -f deployment.yaml to create or update resources based on deployment.yaml.
kubectl describe pod <pod_name> for details on one pod.
kubectl expose exposes a port for deployment.
kubectl port-forward forwards one or more local ports to remote pod.
kubectl exec -it <pod_name> bash
kubectl get secrets/<specific_secret> -o yaml
configMap for non-secrets and secret for credentials.
kube master(s) manages kube nodes/minions
Cheatsheet -> https://kubernetes.io/docs/reference/kubectl/cheatsheet/#kubectl-autocomplete

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
README.md		README.md
deployment.yaml		deployment.yaml
mongo.yaml		mongo.yaml