Kubernets Notes

gistfile1.txt

https://docs.docker.com/engine/install/linux-postinstall/
https://docs.docker.com/engine/install/ubuntu/#installation-methods

*Run images locally on minikube
https://medium.com/swlh/how-to-run-locally-built-docker-images-in-kubernetes-b28fbc32cc1d

Enable local docker images to be visible by minikube
minikube start
eval $(minikube -p minikube docker-env)
kubectl config set-context --current --namespace=openapi

docker build should be run in the same console env

*create cluster

kops create cluster --name=kube.plutto.money --state=s3://kops100k-bucket --zones=sa-east-1a --node-count=2 --node-size=t3.micro --master-size=t3.micro --dns-zone=kube.plutto.money --cloud=aws
kops update cluster --name kube.plutto.money --yes --admin
ssh -i ~/.ssh/id_rsa ubuntu@api.kube.plutto.money
kops validate cluster --wait 10m

*deployment
kubectl create -f contract-service/kube-local.yml
kubectl expose deployment contracts-service --type=Node
kubectl get services

check health:  kops validate cluster


* How to update kubectl to see a new Kubernetes cluster

https://gist.github.com/jeffjohnson9046/295e7a032b9a910b0f9896e1c432e972

* get correct name of the zones: https://github.com/kubernetes/kops/issues/3784


show info of available items: kubectl get service/pod/deployment

show info from moduel: kubectl describe pod contracts-service-5dbbfb79bb-7lxfn
execute command in pod(deployed docker): kubectl exec contracts-service-5dbbfb79bb-7lxfn -- ls

Port forward to local: kubectl port-forward contracts-service-5dbbfb79bb-7lxfn 8081:8080

Debug:
see logs in pod/service: kubectl attach contracts-service-5dbbfb79bb-7lxfn

access pod: kubectl run -i --tty busybox --image=busybox --restart=Never


Load balance permission:
aws iam create-service-linked-role --aws-service-name "elasticloadbalancing.amazonaws.com"


create configmap from .properties to be used as env variables
kubectl create configmap db-configmap --from-env-file db.properties