Selecting a different primary replica

If you do not have the Yandex Cloud CLI yet, install and initialize it.

To change a cluster's primary replica, run the command:

yc managed-mongodb hosts stepdown <current_primary_replica_name> \
   --name=<cluster_name>

You can request the name of the shard primary replica with the list of cluster hosts and the cluster name, with the list of clusters in the folder.

1. Get an IAM token for API authentication and put it into the environment variable:

   export IAM_TOKEN="<IAM_token>"
   

2. Use the Cluster.StepdownHosts method and send the following request, e.g., via cURL:

   curl \
       --request POST \
       --header "Authorization: Bearer $IAM_TOKEN" \
       --header "Content-Type: application/json" \
       --url 'https://mdb.api.cloud.yandex.net/managed-mongodb/v1/clusters/<cluster_ID>:stepdownHosts' \
       --data '{
                "hostNames": [
                   "<current_primary_replica_name>"
                ]
               }'
   

   You can get the cluster ID with the list of clusters in the folder, and the name of the shard primary replica, with the list of cluster hosts.

3. View the server response to make sure the request was successful.

1. Get an IAM token for API authentication and put it into the environment variable:

   export IAM_TOKEN="<IAM_token>"
   

2. Clone the cloudapi repository:

   cd ~/ && git clone --depth=1 https://github.com/yandex-cloud/cloudapi
   

   Below, we assume the repository contents are stored in the ~/cloudapi/ directory.

3. Use the ClusterService.StepdownHosts call and send the following request, e.g., via gRPCurl:

   grpcurl \
       -format json \
       -import-path ~/cloudapi/ \
       -import-path ~/cloudapi/third_party/googleapis/ \
       -proto ~/cloudapi/yandex/cloud/mdb/mongodb/v1/cluster_service.proto \
       -rpc-header "Authorization: Bearer $IAM_TOKEN" \
       -d '{
            "cluster_id": "<cluster_ID>",
            "host_names": [
               "<current_primary_replica_name>"
            ]
           }' \
       mdb.api.cloud.yandex.net:443 \
       yandex.cloud.mdb.mongodb.v1.ClusterService.StepdownHosts
   

   You can get the cluster ID with the list of clusters in the folder, and the name of the shard primary replica, with the list of cluster hosts.

4. View the server response to make sure the request was successful.