Resize a MogDB Cluster

Creating a Highly Available MogDB Cluster

High availability is enabled by default in MogDB Operator as long as you have multiple replicas. To create a High Availability MogDB cluster, you can execute the following command.

mgo create cluster cluster1 --replica=1

Scaling Up MogDB Cluster

You can use the following command mgo scale to scale an existing MogDB cluster to add slave nodes to it.

mgo scale cluster1

Scaling Down MogDB Cluster

To scaled down a MogDB cluster, you must provide the target of the instances to be scaled down. You can perform this operation using the following mgo scaledown command to perform this operation.

mgo scaledown cluster1 --query

Expected output:

PODNAME              STATUS     NODE
cluster1-rtwdz       Running    mogdb-k8s-002

After determining the instances to be scaled down, you can run the following command:

mgo scaledown cluster1 --target=cluster1-rtwdz