commands

podman run --name kubernetes-native-app -p 8080:8080 lib/kubernetes-cloud-native-app-0.0.1-SNAPSHOT.jar
podman rm registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app
podman build -t registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app .
podman run -p 8080:8080 registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app:latest
podman push registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app:latest`
skopeo list-tags docker://registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app
skopeo inspect docker://registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app:latest

basic podman commands

podman container list
podman image list
podman rmi imagename
podman pod list

to create deployment

kubectl create deployment kubernetes-native-app --image registry.gitlab.com/jatinderkumarchaurasia/flowkind/kubernetes-native-app:latest -o yaml --dry-run=client > k8s/deployment.yaml

to create service

kubectl create service clusterip kubernetes-native-app --tcp 80:8080 -o yaml --dry-run=client > k8s/service.yaml

to apply those

kubectl apply -f k8s

to create secret

kubectl create secret docker-registry <name> --docker-server=DOCKER_REGISTRY_SERVER --docker-username=DOCKER_USER --docker-password=DOCKER_PASSWORD --docker-email=DOCKER_EMAIL
example
kubectl create secret docker-registry gitlab-auth --docker-server=https://registry.gitlab.com --docker-username=yourusername --docker-password=yourpassword --docker-email=jatinderkumarchaurasia@gmail.com

to forward the port to local

kubectl port-forward service/kubernetes-native-app 8080:80

Networking

finding cluster ip

kubectl get pod -o wide

finding service ip

kubectl get service --all-namespaces

some other commands

to set config to use cluster
kubectl config set-cluster gke_flowkind-325606_us-central1-c_flowkind
to set config to use context
kubectl config --kubeconfig=config use-context gke_flowkind-325606_us-central1-c_flowkind
kubectl get namespace
kubectl get secrets
kubectl config set-context --current --namespace=<namespace> -- to switch between namespace
kubectl delete secret gitlab-auth -- to delete secret that created 
kubectl get services --namespace flowkind
kubectl get pod --namespace flowkind
kubectl get deployments --namespace flowkind
watch -n 1 kubectl get all

to install nginx-controller , i followed some tutorial from gcloud -Doc Link

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update
helm install nginx-ingress ingress-nginx/ingress-nginx
kubectl get deployment nginx-ingress-nginx-ingress
kubectl get service nginx-ingress-nginx-ingress
kubectl get service nginx-ingress-nginx-ingress

how to check watch -n 1 kubectl get all

watch -n 1 kubectl get all
NAME                                                          READY   STATUS    RESTARTS   AGE
pod/kubernetes-native-app-6d49d8fb5f-28dzg                    1/1     Running   0          48m
pod/nginx-ingress-ingress-nginx-controller-5bbd94d775-wjtfc   1/1     Running   0          12m

NAME                                                       TYPE           CLUSTER-IP      EXTERNAL-IP     PORT(S)                      AGE
service/kubernetes-native-app                              ClusterIP	  10.108.13.102   <none>          80/TCP                       47m
service/nginx-ingress-ingress-nginx-controller             LoadBalancer   10.108.1.221    104.198.39.59   80:30597/TCP,443:30950/TCP   13m
service/nginx-ingress-ingress-nginx-controller-admission   ClusterIP      10.108.15.225   <none>          443/TCP                      13m

NAME                                                     READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/kubernetes-native-app                    1/1     1            1           48m
deployment.apps/nginx-ingress-ingress-nginx-controller   1/1     1            1           13m

NAME                                                                DESIRED   CURRENT   READY   AGE
replicaset.apps/kubernetes-native-app-6d49d8fb5f                    1         1         1	48m
replicaset.apps/nginx-ingress-ingress-nginx-controller-5bbd94d775   1         1         1	13m

preconfiguration to use google kubernetes

1. gcloud init - it will give you option to set your project 
2. gcloud auth login will do the same 
3. gcloud container clusters get-credentials my-first-cluster-1 --zone us-central1-c --project flowkind-app - to get credentials
   it will add the cluster configuration to your ~/.kube/config file
4. kubectl get nodes - will give all the nodes that are present on cluster
5. if you have multiple clusters that are running on - you need to check
   i) kubectl config view - give you all the cluster and their context details
   ii) kubectl config set-cluster cluster_name
   iii) the namespace default will auto created in cluster
   iii) to create new namespace and switch to use that namespace
          kubectl create namespace namespace_name
          kubectl config set-context --current --namespace namespace_name
6.) Remove
   kubectl delete -f k8s/ingress.yaml - will delete the ingress
   helm del nginx-ingress
   - this command will delete the service - to see all the services - kubectl get services
   kubectl delete service kubernetes-native-app
   - this command will delete the deployment - to see all the deployment kubectl get deployments
   kubectl delete deployment kubernetes-native-app
   - this command will delete the cluster
   gcloud container clusters delete my-first-cluster-1 --zone us-central1-c --project flowkind-app