Symptoms
VPS backup/migration task in OA fails with the following diagnostics:
-1: Connect failed:
PVA Agent log file C:\vzlog\PVA\Agent\YYYY-MM-DD-vzagent.log on the hardware node, hosting the VPS, contains the following lines:
T=10:44:48:753; L=(inf); PID=13708; TID=3590; P=VZLOperatorCommon [VZL::VZLHaulControlOperatorPrototype::ChannelHandlerPrototype::doConnect] [VZL::VZLHaulControlOperatorPrototype::ChannelHandlerPrototype::doConnect] Connecting to 192.0.2.2:4435
T=10:44:58:754; L=(err); PID=2916; TID=354c; P=VZLHaulControlAgent [VZL::VZLHaulConnectorAgent::connect] [VZLHaulConnectorAgent::connect] Connect command failed (3306) Connect failed :
Cause
This error occurs if PVA agent service on the Virtuozzo server with the container cannot establish data connection to the target node over the port 4435.
Resolution
Most common solution: open port 4435 on the backup node / target node for migration in the local or network firewall.
Use tcpdump/windump (or Microsoft Network Monitor) tools on source hardware node to check if packets are reaching the target server. Check/configure firewall rules on the PVC servers involved in accordance with the following KB articles:
Virtuozzo for Linux - Which ports should be opened on Virtuozzo hardware node and Service Container
Virtuozzo for Windows - Which ports should be opened on Virtuozzo hardware node and Service VE
Operations Automation Firewall Guide