We hit this bug also with DT and we noticed that moving conditional options
(those below) in the global section solve the problem, so we worked around
changing dhcp.conf template.
if option arch = 00:0E {
filename "pxelinux.0";
option path-prefix "ppc64el/";
} elsif option arch = 00:07 {
filename "bootx64.efi";
} elsif option arch = 00:0B {
filename "grubaa64.efi";
} elsif option arch = 00:0C {
filename "bootppc64.bin";
} else {
filename "pxelinux.0";
}
class "PXE" {
match if substring (option vendor-class-identifier, 0, 3) = "PXE";
default-lease-time 30;
max-lease-time 30;
}
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https://bugs.launchpad.net/bugs/1521618
Title:
wrong subnet in DHCP answer when multiple networks are present
Status in MAAS:
Triaged
Status in isc-dhcp package in Ubuntu:
Confirmed
Bug description:
So I have 3 interfaces with 3, non-overlapping subnets defined in my
maas cluster controller.
The idea would be that there is a provisioning network (10.6.0.0/16)
to do the actual provisioning and once the node gets deployed it is
using a different network (because the provisioning network is only
1x1Gbit while the production network is bonded (LACP) 10Gbit).
However, when I boot up a fresh, new node to add to MAAS, it gets the
following DHCP reply:
ip=10.6.239.3:10.6.250.250:9.4.113.254:255.255.255.0
So instead of picking up the /16 subnet correctly for the 10.6.239.3
IP, it picks up the /24 from the network where it gets it's default
gateway from.
Is this a bug or my understanding of how MAAS should behave when there
are multiple networks flawed?
Here is my /var/lib/maas/dhcpd.conf:
subnet 9.4.113.0 netmask 255.255.255.0 {
if option arch = 00:0E {
filename "pxelinux.0";
option path-prefix "ppc64el/";
} elsif option arch = 00:07 {
filename "bootx64.efi";
} elsif option arch = 00:0B {
filename "grubaa64.efi";
} elsif option arch = 00:0C {
filename "bootppc64.bin";
} else {
filename "pxelinux.0";
}
interface "eth0";
ignore-client-uids true;
option subnet-mask 255.255.255.0;
option broadcast-address 9.4.113.255;
option domain-name-servers 9.4.113.251;
option domain-name "i.zc2.ibm.com";
option routers 9.4.113.254;
option ntp-servers ntp.ubuntu.com;
range dynamic-bootp 9.4.113.150 9.4.113.190;
class "PXE" {
match if substring (option vendor-class-identifier, 0, 3) = "PXE";
default-lease-time 30;
max-lease-time 30;
}
}
subnet 10.6.0.0 netmask 255.255.0.0 {
if option arch = 00:0E {
filename "pxelinux.0";
option path-prefix "ppc64el/";
} elsif option arch = 00:07 {
filename "bootx64.efi";
} elsif option arch = 00:0B {
filename "grubaa64.efi";
} elsif option arch = 00:0C {
filename "bootppc64.bin";
} else {
filename "pxelinux.0";
}
interface "eth1";
ignore-client-uids true;
option subnet-mask 255.255.0.0;
option broadcast-address 10.6.255.255;
option domain-name-servers 9.4.113.251;
option domain-name "i.zc2.ibm.com";
option ntp-servers ntp.ubuntu.com;
range dynamic-bootp 10.6.239.0 10.6.239.239;
class "PXE" {
match if substring (option vendor-class-identifier, 0, 3) = "PXE";
default-lease-time 30;
max-lease-time 30;
}
}
Here is "subnets read":
[
{
"dns_servers": [],
"name": "9.4.113.0/24",
"space": "space-0",
"vlan": {
"name": "untagged",
"resource_uri": "/MAAS/api/1.0/vlans/0/",
"fabric": "fabric-0",
"vid": 0,
"id": 0
},
"gateway_ip": "9.4.113.254",
"cidr": "9.4.113.0/24",
"id": 1,
"resource_uri": "/MAAS/api/1.0/subnets/1/"
},
{
"dns_servers": [],
"name": "10.7.0.0/16",
"space": "space-0",
"vlan": {
"name": "untagged",
"resource_uri": "/MAAS/api/1.0/vlans/5001/",
"fabric": "fabric-1",
"vid": 0,
"id": 5001
},
"gateway_ip": null,
"cidr": "10.7.0.0/16",
"id": 2,
"resource_uri": "/MAAS/api/1.0/subnets/2/"
},
{
"dns_servers": [],
"name": "10.6.0.0/16",
"space": "space-0",
"vlan": {
"name": "untagged",
"resource_uri": "/MAAS/api/1.0/vlans/5002/",
"fabric": "fabric-2",
"vid": 0,
"id": 5002
},
"gateway_ip": null,
"cidr": "10.6.0.0/16",
"id": 3,
"resource_uri": "/MAAS/api/1.0/subnets/3/"
}
]
Running 1.9.0~rc2+bzr4509-0ubuntu1~trusty1.
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