Configuring discovery-clients Service

Clients use NVMe/TCP to connect to the cluster. The discovery-client service runs on the client machines, and manages the NVMe connections. This service keep the client connected through cluster nodes changes (scale-up/down, node replacement, etc.).

See Access to the Cluster for additional information.

The following details how to configure the discovery-client:

1. Get the VIP of the cluster’s Internal loadbalancer:
   • Go to the managed resource group of the cluster.
   • Select the private LB (lb-private).
   • Go to the Frontend IP configuration. The Loadbalancer VIP will be there. You can also get the private VIP using AZ CLI or PowerShell (the privateIPAddress field).

az network lb frontend-ip show --lb-name lbcluster-lb-private --resource-group demo-managed-rg --name lbcluster-lb-private-fe-conf

1. Get the cluster’s nqn, using lbcli get cluster -o json.
2. Make sure that the discovery client is running and enabled:

systemctl start discovery-client

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systemctl start discovery-client

4. Add the discovery endpoints to the discovery client:

discovery-client add-hostnqn --name=<file name> -a

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<discovery-endpoints> -q <client’s nqn> -n <cluster’s nqn>