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Choose Kubernetes Operator Installation Mode: Single- or Multi-Kubernetes Clusters
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The Kubernetes Operator can manage custom resources for single- and multi-Kubernetes clusters. Before you install the Kubernetes Operator, decide which type of Kubernetes cluster deployment you want to support, single- or multi-Kubernetes cluster.
Kubernetes Operator Watches Single-Kubernetes Cluster Resources
You can configure the Kubernetes Operator to watch Ops Manager resources and MongoDB resources
for a replica set or a sharded cluster in a single Kubernetes cluster.
For steps, see Install the Operator.
Kubernetes Operator Watches Multi-Kubernetes Cluster Resources
You can configure the Kubernetes Operator to watch Ops Manager resources, MongoDB resources,
and MongoDBMultiCluster resources for a replica set in a multi-Kubernetes cluster. For steps,
see Multi-Kubernetes-Cluster Quick Start.
Kubernetes Operator Watches Resources in a Single- and Multi-Kubernetes Cluster
You can configure the Kubernetes Operator to watch the following types of CustomResourceDefinitions:
MongoDBresourcesOps ManagerresourcesMongoDBUsersresourcesMongoDBMultiClusterresources
Depending on the watched resources, the Kubernetes Operator reconciles resources based on the given CustomResourceDefinition.
To support custom resources deployed in single- and multi-Kubernetes clusters, set up one instance of the Kubernetes Operator that will watch for and reconcile custom resources for a single Kubernetes cluster and a multi-Kubernetes-cluster deployment. Use different non-overlapping subsets of namespaces for each type of resource.
Set .Values.operator.watchedResources as follows:
-watch-resource=MongoDB \ -watch-resource=OpsMnagers \ -watch-resource=MongoDBusers \ -watch-resource=MongoDBMultiCluster
Note
Install and set up a single Kubernetes Operator instance and configure it to watch one, many, or all custom resources in different, non-overlapping subsets of namespaces. See also Does MongoDB support running more than one Kubernetes Operator instance?
Next Steps
After deciding how you want to install the Kubernetes Operator, you can:
Set the scope of your deployments for single Kubernetes clusters, or set the multi-Kubernetes cluster deployment's scope.
Install single-Kubernetes cluster. For single-Kubernetes clusters, review the considerations, complete the prerequisites and install the Kubernetes Operator.
Install the Kubernetes Operator in a multi-Kubernetes-cluster deployment. See the Multi-Kubernetes-Cluster Quick Start.