NetWorker vProxy Backup Fails with "RPC error: Failed to connect to host " and "Err: 5037-Cannot resolve IP address from Host "

Summary: The NetWorker VMware Protection (NVP) integration is configured with the vProxy Appliance. The vProxy deployment had some issues with name resolution and DNS. The virtual machine (VM) backups for some Virtual Machines fail with an invalid name resolution error message. ...

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Symptoms

From the /opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log file: 
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:YYYY-MM-DDTHH:MM:SSZ ERROR:  [1268:7F4794001E30] ddp_connect_with_config_internal() failed, Hostname: 110DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:YYYY-MM-DDTHH:MM:SSZ ERROR:  [1268:7F4794001E30] ddp_connect_with_config() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T07:08:43Z ERROR:  [1268:7F4778001C80] ddp_connect_with_config_internal() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T07:08:43Z ERROR:  [1268:7F4778001C80] ddp_connect_with_config() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
---- Skipping Lines ----
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T13:59:20Z ERROR:  [1268:7F4778001C80] ddp_connect_with_config() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T14:06:29Z INFO:   [1268:7F476C001C80] ddcl_nfs_open_tcp - Timed out trying to resolve the hostname: DD###_T4
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T14:15:29Z ERROR:  [1268:7F476C001C80] ddp_connect_with_config_internal() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0
./opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-boost.log:2023-11-01T14:15:29Z ERROR:  [1268:7F476C001C80] ddp_connect_with_config() failed, Hostname: DD###_T4, Err: 5037-Cannot resolve IP address from Host DD###_T4-failover for ip family 0

From /nsr/logs/daemon.raw: 
71193 MM/DD/YYYY HH:MM:SS AM  0 0 0 4988 4616 0 my_networker_server nsrd NSR info Media Info: Failed to start nsrsnmd on host my_storagenode_name, error `RPC error: Failed to connect to host 'my_storagenode_name': Remote system error - No connection could be made because the target machine actively refused it.
 
See Dell article 22793, NetWorker: How to use nsr_render_log

Cause

Name Resolution Issue at vProxy Host Level

Resolution

Manually add the IP address, FQDN, Short Name of vCenter, Data Domain, NetWorker, and Storage Node in /etc/hosts of vProxy Host.

Start vProxy VM backups now.
  1. Log in to the vProxy PuTTY Session as admin then switch to root:
sudo su - root
  1. Run the following command to create a /etc/host entry
# echo "IP_of_vCenter FQDN_of_vCenter ShortName_of_vCenter" >> /etc/hosts
SAMPLE: 
# echo "10.10.10.10 myvcenter.abc.com myvcenter" >> /etc/hosts
# echo "IP_of_DD FQDN_of_DD ShortName_of_DD" >> /etc/hosts
# echo "IP_of_NWServer FQDN_of_NWServer ShortName_of_NWServer" >> /etc/hosts
# echo "IP_of_StorageNode FQDN_of_StorageNode ShortName_of_StorageNode" >> /etc/hosts

Products

NetWorker Family
Article Properties
Article Number: 000219162
Article Type: Solution
Last Modified: 23 Oct 2024
Version:  3
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