Hi John
Thanks. Packer is a tool to automatically bring up and configure a
virtual machine for the first time. It is like installing, for example
an ubuntu, machine from an iso image: The installer runs and after
completion the new machine makes a reboot and you can continue to
configure the new machine. So, I do not know the MAC address in advance
to make a reservation.
The challenge I think I face is to make sure that the IP address after
the reboot is the same like during first power up when the os installer
is running.
I think I have to create a configuration where kea issues the same IP
for the above scenario. I tried this to make sure that the MAC address
and the hostname are the same. I also configured networking of the new
machine to send 'dhcp-identifier: mac'. But that is obviously not enough.
Thanks to your answer I see the following things I can try. But may be
you have even a better, simpler idea.
- Create a MAC address by hand and make a reservation
- Try to play around with the lease time for the first DHCP request.
- Use static IP but in this case I don't want to do that if I can avoid it.
- Configure kea to use only "host-reservation-identifiers":
["hw-address"] but not sure if this would help.
Best Roland
192.168.178.*251*,00:50:56:92:07:82,01:00:50:56:92:07:82,0
,1609062019,1,1,1,ubuntu-server,0,
192.168.178.*252*,00:50:56:92:07:82,01:00:50:56:92:07:82,4000,1609066573,1,1,1,ubuntu-server,0,
www.exasoft.ch <http://www.exasoft.ch>
On 12/27/20 12:06 PM, Gibbins, John (IM&T, Black Mountain) wrote:
Hi Roland,
If the client does not request the same IP as it had before you probably need
to assign a fixed IP to the device.
I'm assuming you have a config which includes your subnet. Something like:
...
"subnet4": [
{
"subnet": "192.168.178.0/24",
...
}
]
...
To ensure that you always get the same IP you need to create a reservation
which maps the MAC to the desired IP. Such as:
...
"subnet4": [
{
"subnet": "192.168.178.0/24",
...
"reservations": [
{
"hw-address": "00:50:56:92:07:82",
"ip-address": "192.168.178.251"
}
]
}
]
...
You may want to check out the "reservation-mode" attribute if you have both
pools and reservations on the same subnet.
Regards
johng
-----Original Message-----
From: Kea-users <kea-users-boun...@lists.isc.org> On Behalf Of rondal
Sent: Sunday, 27 December 2020 9:23 PM
To: kea-users@lists.isc.org
Subject: [Kea-users] Lease same IP for same MAC
Hi, I try to deploy an ubuntu server to vsphere with packer. After
installation has finished the machine reboots an gets an other IP address.
Packer can not complete its work because it is still trying to connect to
the old ip address.
From the kea log I see the following:
192.168.178.*251*,00:50:56:92:07:82,01:00:50:56:92:07:82,0
,1609062019,1,1,1,ubuntu-server,0,
192.168.178.*252*,00:50:56:92:07:82,01:00:50:56:92:07:82,4000,1609066573,1,1,1,ubuntu-server,0,
In the client I configure networking (netplan) with dhcp-identifier: mac
- Any ideas how I can tell kea to lease the same ip, in this case *.251,
again?
Best Roland
--
Sent from: http://kea-users.7364.n8.nabble.com/
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