[Dnsmasq-discuss] Re: Dnsmasq-discuss] Would like to use dnsmasq for cluster booting
Joe Landman wrote: Hi folks: I have been using dnsmasq for a few years within a simple network and some linux clusters. With the inclusion of the DHCP bits, and the bootp bits, suddenly the idea of replacing that fine bit of work known as the ISC DHCP server seems possible (and quite likely). I have managed to serve some pxelinux.0 files quite nicely. What I want to do is to serve the nbgrub (network boot grub) bits, and have it read its menu.lst. To make this happen, I need to set option T150 to (nd)/menu.lst . I am doing this via dhcp-option=150,(nd)/menu.lst So after setting this up, nbgrub does boot, but the logs have Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPREQUEST(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPACK(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 11:40:55 autoinst in.tftpd[11946]: RRQ from 192.168.32.34 filename /nbgrub Sep 3 11:40:55 autoinst in.tftpd[11946]: tftp: client does not accept options Sep 3 11:40:55 autoinst in.tftpd[11947]: RRQ from 192.168.32.34 filename /nbgrub and then nothing (e.g. no menu.lst request), and the grub just hangs there. What am I doing wrong? Will dnsmasq work this way or can it serve only pxelinux like bits? Here are my relevant dnsmasq.conf options: domain=boot.scalableinformatics.com dhcp-range=192.168.32.1,192.168.32.128 dhcp-boot=/nbgrub,autoinst,192.168.32.217 dhcp-option=150,(nd)/menu.lst Thanks! Joe That should all work: the only obvious (potential) problem is the quotes in the dhcp-option line. They are not strictly necessary, and will break things on earlier dnsmasq versions. They should be OK with 2.22 and 2.23, at least. Can you use tcpdump or ethereal to grab the complete DHCPREQUEST and DHCPACK packets and send them to me off list? That's by far the easiest way to see if the problem is dnsmasq configuration or not. Cheers, Simon.
[Dnsmasq-discuss] Re: Dnsmasq-discuss] Would like to use dnsmasq for cluster booting
sigh s/nbgrub/pxegrub/* Works. Thanks. Simon Kelley wrote: Joe Landman wrote: Hi folks: I have been using dnsmasq for a few years within a simple network and some linux clusters. With the inclusion of the DHCP bits, and the bootp bits, suddenly the idea of replacing that fine bit of work known as the ISC DHCP server seems possible (and quite likely). I have managed to serve some pxelinux.0 files quite nicely. What I want to do is to serve the nbgrub (network boot grub) bits, and have it read its menu.lst. To make this happen, I need to set option T150 to (nd)/menu.lst . I am doing this via dhcp-option=150,(nd)/menu.lst So after setting this up, nbgrub does boot, but the logs have Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPREQUEST(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 07:40:55 autoinst dnsmasq[11915]: DHCPACK(eth0) 192.168.32.34 00:11:09:cc:d3:e8 Sep 3 11:40:55 autoinst in.tftpd[11946]: RRQ from 192.168.32.34 filename /nbgrub Sep 3 11:40:55 autoinst in.tftpd[11946]: tftp: client does not accept options Sep 3 11:40:55 autoinst in.tftpd[11947]: RRQ from 192.168.32.34 filename /nbgrub and then nothing (e.g. no menu.lst request), and the grub just hangs there. What am I doing wrong? Will dnsmasq work this way or can it serve only pxelinux like bits? Here are my relevant dnsmasq.conf options: domain=boot.scalableinformatics.com dhcp-range=192.168.32.1,192.168.32.128 dhcp-boot=/nbgrub,autoinst,192.168.32.217 dhcp-option=150,(nd)/menu.lst Thanks! Joe That should all work: the only obvious (potential) problem is the quotes in the dhcp-option line. They are not strictly necessary, and will break things on earlier dnsmasq versions. They should be OK with 2.22 and 2.23, at least. Can you use tcpdump or ethereal to grab the complete DHCPREQUEST and DHCPACK packets and send them to me off list? That's by far the easiest way to see if the problem is dnsmasq configuration or not. Cheers, Simon. -- Joseph Landman, Ph.D Founder and CEO Scalable Informatics LLC, email: land...@scalableinformatics.com web : http://www.scalableinformatics.com phone: +1 734 786 8423 fax : +1 734 786 8452 cell : +1 734 612 4615
[Dnsmasq-discuss] Re: Dnsmasq-discuss] Would like to use dnsmasq for cluster booting
Joe Landman wrote: sigh s/nbgrub/pxegrub/* Works. Thanks. OK. FYI, option 150 was missing in the packet traces you sent because it was missing from the requested options list. I guess nbgrub doesn't support option 150 so it doesn't ask the DHCP server for it. Cheers, Simon.
