Setup the k8s cluster

Create a Secret file

• Create a secret (for MySQL and Postgres)

kubectl create secret generic postgres-pass --from-literal=password=<password>
kubectl create secret generic mysql-pass --from-literal=password=<password>
kubectl create secret generic onem2m --from-literal=origin=<origin>

Apply the deployment files

• Apply the ConfigMap for the MySQL and PostgreSQL init scripts

kubectl apply -f mysql-configmap.yml -f postgres-configmap.yml

• Apply MySQL, PostgreSQL and Mobius deployment

kubectl apply -f mysql-deployment.yaml -f mobius-deployment.yaml -f postgres-deployment.yaml -f onem2m-recorder-deployment.yaml grafana-deployment.yml

• Manually init the onem2m_recorder DB in PostgreSQL

Create the NGINX Ingress Controller

• Follow the OVH documentation

• Check the external IP allocation

kubectl --namespace default get services -o wide -w looming-gnat-nginx-ingress-controller

• Apply the NGINX configuration

kubectl apply -f nginx-ingress.yaml

Kubernetes dashboard

If you need the k8s dashboard, follow this documentation : https://docs.ovh.com/gb/en/kubernetes/installing-kubernetes-dashboard/

Commands used to create the config files

Create the ConfigMap file

• Create ConfigMap from a file

kubectl create configmap mysql-init-db --from-file=./data/mobiusdb.sql

• Dump ConfigMap into a yaml file (then kubectl apply it as any other config file)

kubectl get configmaps mysql-init-db -o yaml > mysql-configmap.yml

Misc useful commands

• Get pods

kubectl get pods

• Get a shell into a container

kubectl exec -it mosquitto -- /bin/sh

• Get services

kubectl get services

• Get the state of a pod

kubectl describe pods <pod_name>

• View a pod logs

kubectl logs <pod_name>

• Get the URL of a service running into Minikube

minikube service mobius --url