1. Install minikube

• minikube is local Kubernetes

• pre-requirement: Docker container or VM environment.

• to install the latest minikube stable release on x86-64 macOS curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64 and then sudo install minikube-darwin-amd64 /usr/local/bin/minikube

• use homebrew brew install minikube

2. Start minikube cluster, check status

• start the cluster minikube start <img 'image/start.png'>

• check status minikube status

3. Interact with cluster

• download the appropriate version of kubectl minikube kubectl -- get po -A
• alias in shell alias kubectl="minikube kubectl --"
• test kubectl kubectl get po -A

4. Deploy applications

• Create a sample deployment and expose it on port 80: kubectl create deployment hello-minikube --image=docker.io/nginx:1.23 # in this line, it is using the docker image name. kubectl expose deployment hello-minikube --type=NodePort --port=80
• check the pod. kubectl get pods NAME READY STATUS RESTARTS AGE stock-prediction-8657974555-vcnkc 0/1 ErrImagePull 0 67s
• check your service kubectl get services hello-minikube
• check your application Your application is now available at http://localhost:7080/

4. Deploy applications alternative with yaml

• set up the docker env. eval $(minikube -p minikube docker-env)
• build a docker image with tag name docker build . -t kubernetestutorial/hello-world
• create deployment kubectl create -f k8t.yaml
• check deployment kubectl logs hello-world-8dw65

5. Manage your cluster with minikube

• Pause, unpause, halt Kubernetes minikube pause minikube unpause minikube stop
• Create a second cluster running an older Kubernetes release: minikube start -p aged --kubernetes-version=v1.16.1
• Delete all of the minikube clusters: minikube delete --all

6. Monitoring service with web browser

• minikube dashboard

7. docker enviroment minikube docker-env output: export DOCKER_TLS_VERIFY="1" export DOCKER_HOST="tcp://127.0.0.1:49704" export DOCKER_CERT_PATH="/Users/michael/.minikube/certs" export MINIKUBE_ACTIVE_DOCKERD="minikube" (# To point your shell to minikube's docker-daemon, run: # eval $(minikube -p minikube docker-env))

8. Erro diagnosis:

• kubectl describe <pod name>

1. Install Helm: brew install helm
2. check whether any pod running on kubernetes kubectl get pod. ## No resources found in default namespace.
3. use helm to add prometheus chart repo helm repo add prometheus-community https://prometheus-community.github.io/helm-charts ## "prometheus-commnity" has been added to your repositories
4. install charts helm install prometheus prometheus-community/prometheus

"Get the Alertmanager URL by running these commands in the same shell: export POD_NAME=$(kubectl get pods --namespace default -l "app=prometheus,component=alertmanager" -o jsonpath="{.items[0].metadata.name}") kubectl --namespace default port-forward $POD_NAME 9093 #################################################################################

#################################################################################

The Prometheus PushGateway can be accessed via port 9091 on the following DNS name from within your cluster: prometheus-pushgateway.default.svc.cluster.local

Get the PushGateway URL by running these commands in the same shell: export POD_NAME=$(kubectl get pods --namespace default -l "app=prometheus,component=pushgateway" -o jsonpath="{.items[0].metadata.name}") kubectl --namespace default port-forward $POD_NAME 9091

For more information on running Prometheus, visit: https://prometheus.io/"

5. check all runing services on kubenetes kubectl get all

source : https://www.youtube.com/watch?v=dk2-_DbWb80

6. Expose the service kubectl expose service prometheus-server --type=NodePort --target-port=9090 --name=prometheus-server-ext "a typo, serer should be server"

7. check servivce kubctl get svc or it will run with the following command for darwin minikube service prometheus-server-ext

8. build dashboard with grafana, use helm add grafana repo, update the repo, helm repo add grafana https://grafana.github.io/helm-charts helm update repo

9. install grafana helm install grafana grafana/grafana

"STATUS: deployed REVISION: 1 NOTES: 1. Get your 'admin' user password by running:

kubectl get secret --namespace default grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:

grafana.default.svc.cluster.local

Get the Grafana URL to visit by running these commands in the same shell:

 export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=grafana,app.kubernetes.io/instance=grafana" -o jsonpath="{.items[0].metadata.name}")
 kubectl --namespace default port-forward $POD_NAME 3000

3. Login with the password from step 1 and the username: admin

#################################################################################

#################################################################################"

10. check helm list helm list
11. expose grafana kubectl expose service grafana --type=NodePort --target-port=3000 --name=grafana-ext run the service: minikube service grafana-ext
12. get grafana secretes for the future login. kubectl get secret --namespace default grafana -o yaml

decrypt the password echo RVdhYXJEcGh3bm0xNnNaRlBTOHd3UHFYOFROQkFXWjhHTDM5a1NKSQ==| openssl base64 -d ; echo

13. once logged in grafana you have opportunity to choose your dashboard. or you could use existing template for the dashboard. https://grafana.com/grafana/dashboards/