install.txt

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Docker:

0)Docker install:
just download dmg/tar/exe 

1) Build docker image:
docker build -t latest .

2) List docker images
docker images

3) Run docker image:
docker run -dp 8080:8080 {image_id}

4) Docker running processes:
docker ps

5) Kill a specific process:
docker kill {container_id}
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Minikube:

0)Minikube install
brew install minikube

1) Register minikube docker env
eval $(minikube -p minikube docker-env)

2) Create the deployments file (just the first time, then edit the pull policy)
kubectl create deployment worker-push-api-python --image=worker-push-api-python:latest -o yaml --dry-run > deployments.yaml

3) Docker build:
docker build -t latest .

4) Apply the deployments:
kubectl apply -f ./deployments.yaml   

5) Port-Forwarding (in alternativa Service e load-balancing)
kubectl port-forward deployment/worker-push-api-python 8080:8080 

6) Retrieve pod id:
kubectl get svc,pods -A -o wide

7) Pod logs:
kubectl logs -f {pod_id} (es.: worker-push-api-python-ff56c8b5f-6qgdn)
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Helm:

1) Install Helm
brew install helm
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Prometheus:

1) Add prometheus repo:
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update

2) Install Prometheus with Values-Prometheus.yaml file (into default namespace)
helm install prometheus prometheus-community/prometheus --namespace default -f ./values-prometheus.yaml

3) Exposing Prometheus web interface:
kubectl port-forward service/prometheus-server 8089:80
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Grafana:

1) Add stable repo:
helm repo add grafana https://grafana.github.io/helm-charts
helm repo update

2) Install Grafana(into default namespace)
helm install grafana grafana/grafana

3) Exposing Grafana:
kubectl expose service grafana --type=NodePort --target-port=3000 --name=grafana-np

4) Retrieve Admin password(Grafana is password protected):
kubectl get secret --namespace default grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

5) Exposing Grafana web interface:
minikube service grafana-np

6) Get Grafana url and port forwarding:
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

&) Access Grafana UI (user "admin" and password retrieved on step 4):
http://127.0.0.1:3000
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