To create a multi-Kubernetes cluster MongoDB deployment, you can:
Use the Quick Start, to deploy a MongoDB replica set across three Kubernetes member clusters, using GKE (Google Kubernetes Engine) and a service mesh.
Deploy a MongoDBMultiCluster Resource on each of the member clusters. This allows you to set different settings for the replica set resource, such as overrides for statefulSet configuration.
Both methods of creating a multi-Kubernetes cluster MongoDB deployment rely on the following services, tools, and their documentation:
Kubernetes clusters. The procedures use GKE (Google Kubernetes Engine) to provision multiple Kubernetes clusters. Each Kubernetes member cluster hosts a MongoDB replica set deployment and represents a data center that serves your application.
MongoDB Controllers for Kubernetes Operator repository with configuration files that the Kubernetes Operator needs to deploy a Kubernetes cluster.
MongoDB Helm Charts for Kubernetes with charts for multi-Kubernetes cluster MongoDB deployments.
Istio service mesh. The quick start procedure uses Istio to facilitate DNS resolution for MongoDB replica sets deployed in different Kubernetes clusters. You can use another service mesh solution as long as you ensure that cross-cluster service FQDNs are resolvable.
In addition, we offer the install_istio_separate_network example script. This script is based on Istio documentation and provides an example installation that uses the multi-primary mode on different networks. We don't guarantee the script's maintenance with future Istio releases. If you choose to use the script, review the latest Istio documentation for installing a multicluster, and, if necessary, adjust the script to match the documentation and your deployment. If you use another service mesh solution, create your own script for configuring separate networks to facilitate DNS resolution.
MongoDB kubectl plugin that sets up multi-Kubernetes cluster MongoDB deployments and allows you to run automatic and manual disaster recovery. To learn more, see the MongoDB Plugin Reference.