On Aug 31, 2016, at 7:15 AM, Van Leeuwen, Robert wrote: > When you look at the dnsmasq process on a neutron server it is indeed set to > static and uses the –dhcp-host options: > dnsmasq --dhcp-range=set:tag0,1.1.1.0,static,5529600s > --dhcp-hostsfile=/var/lib/neutron/dhcp/123-4567/host --lots_of_other_options
Using static IPs with DNSMasq isn't horribly difficult, but it takes a little attention. This is examples from my own setup. I have all my compute nodes configured to get DHCP addresses, but in the DHCP server (dnsmasq), I make sure it gives out static IPs. This is a HP Blade Center, with 16 BL460c/G6 blades: /etc/dnsmasq.conf ================= # Network for the iLO interface on the blades dhcp-range=net:iLO,10.0.1.0,static,infinite # The default network (anything else - dynamic IPs) dhcp-range=192.168.69.150,192.168.69.250,12h # Network for eth1 on the blades dhcp-range=net:bc1,10.0.4.0,static,infinite # MAC to IP to HOSTNAME mapping dhcp-host=78:e7:d1:5e:32:22,10.0.1.1,bladeA01-iLO,infinite dhcp-host=78:e7:d1:59:f8:ec,10.0.4.1,bladeA01,infinite [etc] # Make sure to tag the hosts dhcp-vendorclass=iLO,CPQRIB3 # iLO class dhcp-vendorclass=bc1,PXEClient:Arch:00000:UNDI:002001 # PXE boot dhcp-vendorclass=bc1,d-i # Debian installer asks with this # Options for Blade Center 1 - iLO dhcp-option=iLO,1,255.255.255.0 dhcp-option=iLO,3,10.0.1.254 dhcp-option=iLO,6,10.0.1.254 dhcp-option=iLO,15,domain.tld dhcp-option=iLO,28,10.0.1.255 dhcp-option=iLO,42,10.0.1.254 dhcp-option=iLO,119,domain.tld. # Options for Blade Center 1 - blades dhcp-option=bc1,1,255.255.255.0 dhcp-option=bc1,3,10.0.4.254 dhcp-option=bc1,6,10.0.4.254 dhcp-option=bc1,15,domain.tld dhcp-option=bc1,28,10.0.4.255 dhcp-option=bc1,42,10.0.4.254 dhcp-option=bc1,119,openstack.domain.tld. # Options for the default network dhcp-option=15,domain.tld dhcp-option=23,50 dhcp-option=27,1 dhcp-option=40,domain dhcp-option=42,0.0.0.0 dhcp-option=44,192.168.69.8 dhcp-option=45,192.168.69.8 dhcp-option=119,domain.tld /etc/hosts ================= 10.0.1.1 bladeA01-iLO.domain.tld bladeA01-iLO 10.0.4.1 bladeA01.domain.tld bladeA01b openstack control control1 controller [etc] Have a look at http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html for explanation on these options and their possible values. The "secret" is actually the "dhcp-vendorclass"! That's what "tags" the request so that it can then be "routed" (bad word, but it kind'a makes a little sense) to the right "dhcp-option" and to the correct "dhcp-host" (which, of course also uses the MAC for selection). _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
