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How to set preferred IP address for PVA Agent communications

  • Updated
Applies to:
  • Virtuozzo Server 6.x

Information

If a Hardware Node has several IP addresses, VA uses the first one on the list for its communications.

If virtualization nodes has both frontnet and backnet IPs, VA Agent on one node may fail to communicate with other nodes unless preferred IP is set, e.g.:

1391441908: can not read reply from destination node
1391441908: can't connect to source node ($IP_ADDRESS) : can not read reply from destination node

This article describes how to configure VA Agent to use a particular IP address for communications via XML API.

NOTE: In case the node is a part of VA infrastructure and is managed through VA web interface, the IP address for communications is defined by the IP, used during node registration. It is advised to register the nodes via internal IPs to separate the traffic.

Resolution

To make VA Agent use a particular IP address for Backup, Restore or other types of VA Agent internal traffic, follow the below steps.

Determine the IP address to be used as the primary VA Agent IP address, e.g.:

[hwnode@03:51:08][~]# ip a l
1: lo: <loopback,up,lower_up> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <broadcast,multicast,up,lower_up> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 20:cf:30:1d:46:2e brd ff:ff:ff:ff:ff:ff
    inet 192.168.55.33/24 brd 192.168.55.255 scope global eth0
    inet 10.55.67.1/24 brd 10.55.67.255 scope global eth0:0
    inet6 fe80::22cf:30ff:fe1d:462e/64 scope link
       valid_lft forever preferred_lft forever
</broadcast,multicast,up,lower_up></loopback,up,lower_up>

Locate VA Agent configuration file (/var/opt/pva/agent/etc/vzagent.conf or /vz/pva/agent/etc/vzagent.conf)

Replace primary_address section in vzagent.conf with the desired IP address, e.g., for Linux nodes:

[hwnode@04:20:23][~]# sed '//s~.*.<\>192.168.55.33<\ -i="-i" var="var" opt="opt" pva="pva" agent="agent" etc="etc" vzagent.conf="vzagent.conf"></\></\>

Restart VA Agent:

# pvaagent restart

NOTE: The resulting section of "vzagent.conf" should look similar to this:


360000
20
10
20
300

192.168.55.33

NOTE2: This example describes VA Agent configuration on a Linux node, but the solution applies to Windows nodes as well.

For more information regarding VA Agent troubleshooting on Windows and Linux, refer to this article: PVA troubleshooting

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