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Hostname
The system hostname, also known as the domain or DNS name, is defined in the pool-wide database and modified
using the xe host-set-hostname-live CLI command as follows:
xe host-set-hostname-live host-uuid=<host_uuid> host-name=<host-name>
The underlying control domain hostname changes dynamically to reflect the new hostname.
DNS servers
To add or remove DNS servers in the IP addressing configuration of a XenServer host, use the pif-reconfigure-ip
command. For example, for a PIF with a static IP:
pif-reconfigure-ip uuid=<pif_uuid> mode=static DNS=<new_dns_ip>
Changing IP address configuration for a standalone host
Network interface configuration can be changed using the xe CLI. The underlying network configuration scripts
should not be modified directly.
To modify the IP address configuration of a PIF, use the pif-reconfigure-ip CLI command. See the section called
“pif-reconfigure-ip” for details on the parameters of the pif-reconfigure-ip command.
Note:
See the section called “Changing IP address configuration in resource pools” for details on
changing host IP addresses in resource pools.
Changing IP address configuration in resource pools
XenServer hosts in resource pools have a single management IP address used for management and
communication to and from other hosts in the pool. The steps required to change the IP address of a host's
primary management interface are different for master and other hosts.
Note:
Caution should be used when changing the IP address of a server, and other networking
parameters. Depending upon the network topology and the change being made, connections
to network storage may be lost. If this happens the storage must be replugged using the
Repair Storage function in XenCenter, or the pbd-plug command using the CLI. For this
reason, it may be advisable to migrate VMs away from the server before changing its IP
configuration.
Changing the IP address of a member host (not pool master)
1. Use the pif-reconfigure-ip CLI command to set the IP address as desired. See Appendix A, Command Line
Interface for details on the parameters of the pif-reconfigure-ip command:
xe pif-reconfigure-ip uuid=<pif_uuid> mode=DHCP
2. Use the host-list CLI command to confirm that the member host has successfully reconnected to the master
host by checking that all the other XenServer hosts in the pool are visible:
xe host-list
Changing the IP address of the master XenServer host requires additional steps because each of the member
hosts uses the advertised IP address of the pool master for communication and will not know how to contact the
master when its IP address changes.
Whenever possible, use a dedicated IP address that is not likely to change for the lifetime of the pool for pool
masters.