AlexRRR/k8-tut

#Creating a namespace

kubectl create namespace k8-demo                      
namespace "k8-demo" created

kubectl config set-context k8-demo --namespace=k8-demo --cluster=default-cluster --user=default-admin

context "k8-demo" set.

kubectl config use-context k8-demo
switched to context "k8-demo".

Create secrets

registry secrets

kubectl create secret docker-registry demo-key \
  --docker-server=registry.env.intra.local.ch \
  --docker-username=alex \
  --docker-password=8ZQ2ZbJJY5fjkkyJ72No \
  --docker-email=alejandro.ramirez.ch@localsearch.ch

configuration secrets

Show app, and configuration file.

kubectl create secret generic weather-config-prod --from-file manifests/config.edn

decode

kubectl get secret weather-config-prod -o yaml |grep config.edn|cut -f2 -d":"| base64 -D

Deployment

Service

kubectl expose deployment weather-app --port=80 --target-port=8080

create Ingress

kubectl create -f ingress.yaml

view Ingress

kubectl get ing

### deployments try to access with Ingress

kubectl create -f weather-deployment-kelvin.yaml --record

rollout status

 kubectl rollout status deploy weather-app

upgrade app

kubectl apply -f weather-deployment-imperial.yaml --record

rollout history

kubectl rollout history deployment weather-app

rollback to version

kubectl rollout undo deployment weather-app --to-revision=5

Canary release

kubectl create -f weather-deployment-metric-canary.yaml --record

Autoscaling (Horizontal Pods Autoscaling)

Start a the pod to be scaled

kubectl run php-apache --image=gcr.io/google_containers/hpa-example \    
  --requests=cpu=500m,memory=500M --expose --port=80

Test the service

kubectl run -i --tty service-test --image=busybox /bin/sh    

# once inside the container run

wget -q -O- http://php-apache.k8-demo.svc.cluster.local

Start the autoscaled

kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10

monitor the scaled

kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10
### watch the number of Pods
kubectl get pods    

Cool things

ui

kubectl proxy

port foward

kubectl get pods
kubectl port-forward somepod 8080 --namespace=kube-system

access shell

kubectl exec -ti [-c container-name] somepod bash

top

kubectl top nodes
kubectl top pods