I actually have a plan for confluent to be able to resolve this precise scenario without so much awkwardness in the future.
In terms of *today*, I think c or b would be the easiest option if a is deemed impossible. The punchline is to try to boot xNBA (efi or kpxe) and then point ipxe at http://${next-server}/tftpboot/xcat/xnba/nodes/n12 or http://${next-server}/tftpboot/xcat/xnba/nodes/n12.uefi , depending on how your nodes boot. Switching between netboot payloads shouldn't require changing dhcp on the fly (unless pushing iSCSI parameters down or similarly exotic stuff), changing to not netboot at all would potentially break. The scenario to imitate (can be adjusted according to your circumstances): if option user-class-identifier = "xNBA" and option client-architecture = 00:00 { supersede server.filename = "http://${next-server}/tftpboot/xcat/xnba/nodes/n12";; } elsif option user-class-identifier = "xNBA" and option client-architecture = 00:09 { supersede server.filename = "http://${next-server}/tftpboot/xcat/xnba/nodes/n12.uefi";; } elsif option client-architecture = 00:07 { supersede server.filename = "xcat/xnba.efi"; } elsif option client-architecture = 00:00 { supersede server.filename = "xcat/xnba.kpxe"; } Jarrod Johnson Systems Management Architect Lenovo -----Original Message----- From: Martin Tippmann [mailto:[email protected]] Sent: Wednesday, November 26, 2014 12:40 PM To: [email protected] Subject: [xcat-user] xCAT with external DHCP and PXE via proxyDHCP Hi, We plan to deploy xCAT on a network where DHCP is already configured and is out of our control. There is no documentation regarding this use case in the xCAT documentation... There is a proxydhcp-xcat binary through but after reading through the source it looks like it's strictly for Windows deployments and not compatible for Linux... Does that mean using xCAT for deploying Linux via PXE with proxyDHCP is unsupported? As far as I've understood the architecture usally a mandatory dhcpd is running on the master and this dhcpd does DHCP for IP-addresses and for PXE. So what are my choices? Would love to get someback on these options: a) Disabling external DHCP and using dhcpd on the xCAT master - I'd like to avoid that but this would work I assume. b) Using proxyDHCP for PXE while using the external DHCP for IP assignment - could be make working if I patch proxydhcp-xcat heavily (or run a dnsmasq that needs to manually configured) and disable dhcpd on the xCAT master? c) Change external DHCP settings to emulate PXE settings for xCAT. And disable dhcpd on the master completly. I assume this does not work because it's breaks switching images? Or does pointing to a general iPXE image would solve the problem? d) Doing something entirely different.. the machines are Dell R720 and they support also booting directly via iSCSI and other goodies I've yet to learn about... but there appears to be no support from xCAT for anything beyond PXE for stateless images? I'd like to have b) working without much needs to maintain a patch.. is this realistic? If c) works everything would be fine, too. Thanks for any hints! regards Martin ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ xCAT-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/xcat-user ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ xCAT-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/xcat-user
