Assign static IPs to KVM VPS in Proxmox using DHCP

Iam

The title said it all. Using this method on Online.net LT DEALS 1701.3.

Install isc-dhcp-server:

apt install isc-dhcp-server

Edit /etc/default/isc-dhcp-server. It should like:

# The default bridge is vmbr0.
INTERFACES="vmbr0"

Modify /etc/dhcp/dhcpd.conf. Example:

subnet 0.0.0.0 netmask 0.0.0.0 {
authoritative;
default-lease-time 21600000;
max-lease-time 432000000;
}

# Bind IP by MAC
host VM1 {

# MAC Address
hardware ethernet 52:54:xx:xx:xx:x1;

# Gateway
option routers 62.xxx.xxx.1;

# Subnet
option subnet-mask 255.255.255.255;

# Failover IP
fixed-address xxx.xxx.xxx.114;

# DNS server
option domain-name-servers 8.8.8.8,8.8.4.4;  

}

Starting the dhcp server on boot:

systemctl enable isc-dhcp-server

Reboot the node server.

When creating the VM we just need to specify the MAC address for specific IP and leave the network config using DHCP.

Shakib

Have tested without MAC address?

Iam

@HostCram said:
Have tested without MAC address?

Not yet.

For OVH/SYS should have similar setup with this.

MikePT

Interesting, wondering how the modules garden proxmox module works with vps creation / IP assign, etc...

Shakib

@Iam said:

>

Not yet.

For OVH/SYS should have similar setup with this.

Not all people use OVH/SYS.

But, your tutorial is interesting.

akhfa

This is what I waiting for

It is painful to setup ip via VNC when internet connection unstable.

Iam

@MikePT said:
Interesting, wondering how the modules garden proxmox module works with vps creation / IP assign, etc...

Regarding the network it should has similar setup.

akhfa

Btw how can I set 2 interface here, for example vmbr0 for public ip, and vmbr1 for local IP?

Rootbox_kevin

Hi all! I know this is a bit of an older thread but I came across this and had trouble using it with OVH. For anyone else coming here in the future looking to implement something like this with OVH use the following config:

option rfc3442-classless-static-routes code 121 = array of integer 8;
subnet 0.0.0.0 netmask 0.0.0.0 {
default-lease-time 21600000;
max-lease-time 432000000;
option rfc3442-classless-static-routes 32,e,f,g,h,0,0,0,0,0,e,f,g,h;

host VM1 { hardware ethernet xx:xx:xx:xx:xx:xx; fixed-address a.b.c.d; option domain-name-servers 8.8.8.8,8.8.4.4; }
}

xx:xx:xx:xx:xx:xx=the mac address associated with the IP address you want to assign
a.b.c.d=the IP address to be assigned
e,f,g,h=the default gateway IP address e.g. if your default gatway IP is 192.168.10.23 then e=192,f=168,g=10,h=23 (and yes those are commas, not periods)

wiggl3

@Rootbox_kevin said:

host VM1 { hardware ethernet xx:xx:xx:xx:xx:xx; fixed-address a.b.c.d; option domain-name-servers 8.8.8.8,8.8.4.4; }
}

Do you set one of these for each individual failover IP on OVH?

I.e. host VM1, host VM2, host VM3 and so on?