The problem I am facing with OVH vRACK IP blocks and Generic Cloud images is each IP block has it's own gateway IP and may have a different netmask (depending on block sizes).
Example block 51.xx8.1xx.64/28
for CentOS 7 I would need to configure the virtual machine as follows
/etc/sysconfig/network-scripts/ifcfg-eth0
/etc/sysconfig/network-scripts/route-eth0
How could I do this? I guess I could run a script after cloud-init to read the gateway and paste it into /etc/sysconfig/network-scripts/route-eth0 but I can't think of how I would get the correct netmask.
Example block 51.xx8.1xx.64/28
Code:
Network IP : 51.xx8.1xx.64
Gateway IP : 51.xx8.1xx.78 (not usable)
Broadcast IP: : 51.xx8.1xx.79
Then use the sub-netmask 255.255.255.240.for CentOS 7 I would need to configure the virtual machine as follows
/etc/sysconfig/network-scripts/ifcfg-eth0
Code:
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
TYPE=Ethernet
NETMASK=255.255.255.240
IPADDR=51.xx8.1xx.72
ARP=yes/etc/sysconfig/network-scripts/route-eth0
Code:
51.xx8.1xx.64/28 dev eth1 table vrack
default via 51.xx8.1xx.78 dev eth1 table vrackHow could I do this? I guess I could run a script after cloud-init to read the gateway and paste it into /etc/sysconfig/network-scripts/route-eth0 but I can't think of how I would get the correct netmask.