Bug #21120
closed
Multiple DHCP orchestration is no longer possible with PXELoader
Description
Hey,
since upgrading from foreman 14.x to 15.4 we have issues when modifying dhcp entries.
whenever we chage the bootloader from Grub2 UEFI to PXELinux BIOS, or vice versa, the foreman smart proxy start creating duplicate dhcp entries for this host.
how to repoduce:
1. create host with PXELinux BIOS bootloader
2. modify host to to use Grub2 UEFI
2. press submit (you will get a modal saying there already is a dhcp enty, and if you like to overwrite it)
3. acknowledge the modal and press the "overwrite" botton
4. now the "submit" button of the host is named "overwrite" -> press it
5. you will get a error message, complaining about a HTTP 409 from the dhcp smart proxy
if you check the leases file of the dhcp server, you will now have at least 2 entries for the same host. i have already see up to 33 entries for the same host within a file.
it also seems that the deleting a host will not always remove a entry from the dhcp leases file, but i have to admit that i am not 100% sure if the host will directly disappear from the leases file after it has been deleted.
to "fix" the issue, you have to:
- delete the host
- stop dhcpd
- remove broken entries from leases file
- start dhcpd
- recreate the host
here is a example from broken dhcp entries for the same host:
host samplehost.example.com {
dynamic;
deleted;
}
host samplehost.example.com {
dynamic;
hardware ethernet 00:50:56:91:a2:84;
fixed-address 172.21.55.57;
supersede server.filename = "pxelinux.0";
supersede server.next-server = ac:15:3a:05;
supersede host-name = "samplehost.example.com";
}
host samplehost.example.com {
dynamic;
deleted;
}
host samplehost.example.com {
dynamic;
hardware ethernet 00:50:56:91:9b:fb;
fixed-address 172.21.55.57;
supersede server.filename = "pxelinux.0";
supersede server.next-server = ac:15:3a:05;
supersede host-name = "samplehost.example.com";
}
host samplehost.example.com {
dynamic;
deleted;
}
host samplehost.example.com {
dynamic;
hardware ethernet 00:50:56:91:d5:f7;
fixed-address 172.21.55.57;
supersede server.filename = "pxelinux.0";
supersede server.next-server = ac:15:3a:05;
supersede host-name = "samplehost.example.com";
}
host samplehost.example.com {
dynamic;
deleted;
}
host samplehost.example.com {
dynamic;
hardware ethernet 00:50:56:91:ae:e9;
fixed-address 172.21.55.57;
supersede server.filename = "pxelinux.0";
supersede server.next-server = ac:15:3a:05;
supersede host-name = "samplehost.example.com";
}
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