Network planning when the PXE-enabled port on the bare metal server and the bare metal compute node belong to different subnets
Network requirements
The system cluster and the bare metal compute node are reachable to each other.
The bare metal compute node and the iLO IP address of the bare metal server are reachable to each other.
The NIC IP address of the bare metal compute node must belong to the same network as the configured DHCP address pool.
You must configure DHCP relay on the router so that the DHCP requests from the bare metal server can be forwarded to the bare metal compute node.
The default route for the specified subnet for address allocation is the IP address of the gateway address of the subnet.
Example
Table-1 Network planning
|
Device |
IP address |
Remarks |
|
System cluster |
VIP: 172.25.17.53/22 |
VLAN: 201 |
|
Bare metal compute node |
eth0: 172.25.50.150/20 DHCP: 10.0.0.151-10.0.0.160/24, with default route 10.0.0.1 |
VLAN: 205 |
|
Bare metal server |
iLO: 172.25.18.22/22 |
iLO: 201 Management interface: 301 |
|
Router |
DHCP relay: Specify the address of the bare metal compute node as the DHCP server address on the DHCP relay agent. |
10.0.0.0/24 Gateway: 10.0.0.1 VLAN: 301 Route: VLAN 205 and VLAN 301 can communicate at Layer 3. |
Procedure
|
|
Perform this task after you finish all the previous tasks. |
Edit the /etc/ironic-inspector/dnsmasq.conf configuration file to add the default route dhcp-option=3,10.0.0.1.
Execute the following command to restart the openstack-ironic-inspector-dnsmasq.service service:
systemctl restart openstack-ironic-inspector-dnsmasq.service