GloriaPG

---
kind: ServiceAccount
apiVersion: v1
metadata:
  name: deleting-pods
  namespace: my-namespace

---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role

GloriaPG

vi pv.yaml

kind: PersistentVolume
apiVersion: v1
metadata:
  name: myvolume
spec:
  storageClassName: normal
  capacity:
    storage: 10Gi

GloriaPG

kubectl run busybox --image=busybox --restart=Never -o yaml --dry-run -- /bin/sh -c 'sleep 3600' > pod.yaml
vi pod.yaml

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: busybox
  name: busybox

GloriaPG

kubectl run nginx --image=nginx --replicas=2 --port=80 --expose
kubectl describe svc nginx # see the 'run=nginx' selector for the pods
# or
kubectl get svc nginx -o yaml --export

vi policy.yaml

kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:

GloriaPG

kubectl run nginx --image=nginx --replicas=2 --port=80 --expose
kubectl describe svc nginx # see the 'run=nginx' selector for the pods
# or
kubectl get svc nginx -o yaml --export

vi policy.yaml

kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:

GloriaPG

kubectl run foo --image=dgkanatsios/simpleapp --labels=app=foo --port=8080 --replicas=3

kubectl get pods -l app=foo -o wide # 'wide' will show pod IPs
kubectl run busybox --image=busybox --restart=Never -it --rm -- sh
wget -O- POD_IP:8080 # do not try with pod name, will not work
# try hitting all IPs to confirm that hostname is different
exit

kubectl expose deploy foo --port=6262 --target-port=8080
kubectl get service foo # you will see ClusterIP as well as port 6262

GloriaPG

kubectl delete po nginx
kubectl run nginx --image=nginx --restart=Never -o yaml --dry-run > pod.yaml
vi pod.yaml

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: nginx

GloriaPG

kubectl run nginx --image=nginx --restart=Never -o yaml --dry-run > pod.yaml

vi pod.yaml
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: nginx
  name: nginx

GloriaPG

echo admin > username
kubectl create secret generic mysecret2 --from-file=username
kubectl get secret mysecret2 -o yaml --export
echo YWRtaW4K | base64 -d

Otra opción para ver los valores de un secreet.

kubectl get secret mysecret2 -o jsonpath='{.data.username}{"\n"}' | base64 -d 

GloriaPG

kubectl create configmap cmvolume --from-literal=var8=val8 --from-literal=var9=val9
kubectl run nginx --image=nginx --restart=Never -o yaml --dry-run > pod.yaml
vi pod.yaml
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: nginx
  name: nginx