Checking Configuration Version

There are two main ways to check which configuration mechanism version (V1 or V2) the nodes of your YDB cluster are using:

1. Embedded UI
2. Cluster metrics

With Embedded UI

This method can be used if metrics collection from the YDB cluster to the monitoring system is not configured. You can check the configuration version for a specific node or switch between nodes in the built-in web interface Embedded UI:

1. Open the configs_dispatcher actor page for any cluster node in your browser:

   http://<endpoint>:8765/actors/configs_dispatcher
   

   where <endpoint> is the address of any YDB cluster node.

2. In the upper part of the opened page, find the Configuration version field. It shows the configuration version (v1 or v2) used by this node.

   This is how the page of a node using configuration V1 looks:

   

3. To check other nodes, use the Nodes... search field in the upper right corner of the page to switch between nodes.

With Cluster Metrics

This method is convenient when there are a large number of nodes in the YDB cluster. If you have configured metrics collection from the YDB cluster to the monitoring system, perform the following actions:

1. Find the dashboard displaying cluster metrics.
2. Go to the config sensor group and the configs_dispatcher subsystem.
3. Pay attention to the ConfigurationV1 and ConfigurationV2 sensors. The values of these sensors show the number of cluster nodes running with configuration V1 and V2 respectively.

For example, if ConfigurationV1 > 0, it means there are nodes in the cluster that use configuration V1. If ConfigurationV1 = 0 and ConfigurationV2 equals the total number of nodes, it means all nodes use configuration V2.