MINIKUBE

Learn

from https://www.youtube.com/watch?v=kWMBSySuLhU

check virtualization is supported on mac os

sysctl -a | grep -E --color 'machdpe.cpu.features|VMX'

install kubectl

brew install kubectl

install hypervisor

brew install hyperkit

install minikube

brew install minikube

start minikube

minikube start --driver=<driver_name> (for example hyperkit)

check status minikube

minikube status

check cluster info

kubectl cluster-info

check nodes

kubectl get nodes

stop minikube

minikube stop

use local docker

eval $(minikube docker-env)

go to pod

kubectl exec -it project-mysql-fcdd7cd78-n964k /bin/sh
kubectl exec -it project-mysql-fcdd7cd78-n964k bash

mysql

https://medium.com/@midejoseph24/deploying-mysql-on-kubernetes-16758a42a746

redis

https://medium.com/@ilyash/how-to-deploy-php-redis-application-to-kubernetes-using-minikube-1c7129245a5d

monitoring

kubectl get nodes
kubectl -n develop get pods
kubectl top node minikube
kubectl top pod project-backend-user-golang-596bbb47ff-5wgfm
minikube addons enable metrics-server
install metric server kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
kubectl get ns
kubectl -n kube-system get pods
kubectl top node minikube
kubectl describe node minikube
kubectl get pods
kubectl get pods -o wide
kubectl top pod project-backend-user-golang-596bbb47ff-5wgfm
kubectl describe project-backend-user-golang-596bbb47ff-5wgfm

install grafana prometheus kube-state-metrics node-exporter

brew install helm helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
helm install prometheus prometheus-community/kube-prometheus-stack

create prometheus-configmap.yaml

kubectl apply -f prometheus-configmap.yaml

install kube-state-metrics node-exporter

helm install kube-state-metrics prometheus-community/kube-state-metrics
NAME: kube-state-metrics
LAST DEPLOYED: Wed May 22 20:58:37 2024
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES: kube-state-metrics is a simple service that listens to the Kubernetes API server and generates metrics about the state of the objects.
The exposed metrics can be found here:
https://github.com/kubernetes/kube-state-metrics/blob/master/docs/README.md#exposed-metrics

The metrics are exported on the HTTP endpoint /metrics on the listening port.
In your case, kube-state-metrics.default.svc.cluster.local:8080/metrics

They are served either as plaintext or protobuf depending on the Accept header.
They are designed to be consumed either by Prometheus itself or by a scraper that is compatible with scraping a Prometheus client endpoint.

helm install node-exporter prometheus-community/prometheus-node-exporter
NAME: node-exporter
LAST DEPLOYED: Wed May 22 20:59:10 2024
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:

1. Get the application URL by running these commands: export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=prometheus-node-exporter,app.kubernetes.io/instance=node-exporter" -o jsonpath="{.items[0].metadata.name}")
   echo "Visit http://127.0.0.1:9100 to use your application"
   kubectl port-forward --namespace default $POD_NAME 9100

access prometheus

kubectl port-forward svc/prometheus-kube-prometheus-prometheus 9090:9090
Status > Targets

install grafana

helm repo add grafana https://grafana.github.io/helm-charts
helm repo update
helm search repo grafana
helm install grafana grafana/grafana
helm list
kubectl port-forward svc/grafana 3000:80 grafana user: admin, password: kubectl get secret --namespace default grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo zSORYZzFSGqtTRL3tygwckBNtjCqV2vndXgKsnmT

remove instalation

helm list
helm uninstall grafana
helm uninstall kube-state-metrics
helm uninstall node-exporter
helm uninstall prometheus

kubectl get all -l release=grafana
kubectl delete deployment -l release=grafana
kubectl delete service -l release=grafana
kubectl delete configmap -l release=grafana
kubectl delete secret -l release=grafana
kubectl delete pvc -l release=grafana

kubectl get all -l release=prometheus
kubectl delete deployment -l release=prometheus
kubectl delete service -l release=prometheus
kubectl delete configmap -l release=prometheus
kubectl delete secret -l release=prometheus
kubectl delete pvc -l release=prometheus

helm repo list
helm repo remove prometheus-community
kubectl get all