k8s-mongo-db-provider

This project helps with auto-provisioning of MongoDb databases within Kubernetes. It provides a Custom Resource Definition, helping you to achieve isolation within your microservice environment (aka. database per microservice)

Works out of the box with MongoDb Replicaset helm chart (https://github.com/helm/charts/tree/master/stable/mongodb-replicaset)

Quickstart

First, you need to install CRD (Custom resource definition) within your cluster:

kubectl apply -f https://raw.githubusercontent.com/onliner10/k8s-mongo-db-provider/master/crd.yaml

This will allow you to create resources of kind MongoDatabase and things like kubectl get mongodb etc..

Then, we need a controller (review this file before doing deployment to production):

kubectl apply -f https://raw.githubusercontent.com/onliner10/k8s-mongo-db-provider/master/examples/controller-deployment.yaml

That's it! If you now create a following resource:

apiVersion: mongo-db-provider.urbanonsoftware.com/v1alpha1
kind: MongoDatabase
metadata:
  name: my-mongo-database

The controller will initalize my-mongo-database, plus create two secrets for you: my-mongo-database-reader and my-mongo-database-writer. The reader has readonly permissions, while the writer can .. well, write.

You can use these secrets like so:

containers:
        - name: kubernetes-hello
          image: mdb_provider_test:local
          imagePullPolicy: Never
          ports:
            - containerPort: 80
          env:
            - name: ASPNETCORE_ENVIRONMENT
              value: "Development"
            - name: MongoDb__ConnectionString
              valueFrom:
                secretKeyRef:
                  name: my-mongo-database-writer
                  key: ConnectionString
            - name: MongoDb__DbName
              valueFrom:
                secretKeyRef:
                  name: my-mongo-database-writer
                  key: DbName

If you would like to drop the database + secrets, simply fire

kubectl delete mongodb my-mongo-database

Config options

Environmental variable	Description
CLUSTER_DOMAIN	Domain of your cluster. Defaults to cluster.local
MONGO_APP_NAME	App label value used to find mongodb in your cluster. Defaults to : mongodb-replicaset
TLS	Use TLS when connecting to mongo? Default: false
HARD_DELETE	Drop database when CRS is deleted ? Defaults to false, meaning it will delete the secrets but not the databse itself