Network and DB clusters in Managed Service for Greenplum®
When creating a cluster, you can:
- Set the network and subnet for the cluster.
- Request public access to connect to the cluster from outside Yandex Cloud.
You can only connect to Managed Service for Greenplum® clusters via master hosts. You cannot connect to segment hosts directly.
Segment hosts are combined into a virtual network, where each of them is a cloud resource. Data is replicated and rebalanced across the segments within this network.
By default, master hosts are available for connection from the VMs located in the same cloud network. For more information about networking, see the Yandex Virtual Private Cloud documentation.
Host name and FQDN
When you create a cluster, Managed Service for Greenplum® automatically assigns its hosts both short and full (FQDN) names. These cannot be changed.
To learn how to get a host FQDN, see this guide.
You can use FQDNs to access master hosts from both inside and outside Yandex Cloud.
Public access to clusters
To enable public access to master hosts from outside Yandex Cloud, enable Public access when creating a cluster. To connect to a cluster, use the FQDNs of its master hosts.
Once you create a cluster, you cannot request or disable public addresses.
Security groups
Tip
When connecting to a cluster from the same cloud network, configure security groups both for the cluster and the connecting host.
Specifics of working with security groups:
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To connect to a cluster, you need rules that allow traffic between the cluster and the connecting host, even if they are in the same security group.
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Security group settings affect the ability to connect to the cluster, its performance, and the network connectivity between its hosts.
For more information, see the Virtual Private Cloud documentation.
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