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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