author | Tero Marttila <tero.marttila@aalto.fi> |
Thu, 26 Feb 2015 14:48:35 +0200 | |
changeset 480 | 7e44854e85d4 |
parent 452 | d10f2b2188bb |
child 483 | 19d084bb4afd |
permissions | -rw-r--r-- |
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= pvl-hosts = |
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DNS/DHCP hosts management/integration for ISC bind9 and dhcpd. |
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Also includes network SNMP discovery. |
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== Hosts == |
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The `pvl.hosts-* etc/hosts/test` tools read hosts files as input, which have an ini format, using section names as hostnames to configure attributes for that host: |
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[foo] |
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ip = 127.0.0.1 |
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ethernet = 00:11:22:33:44:55 |
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[bar] |
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ip = 127.0.0.2 |
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ethernet = 01:23:45:67:89:ab |
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The default mechanism uses the basename of the given config file as the domain name, so this example file would generate something like the following output for use in a `zone "test" { ... }` zonefile: |
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$ pvl.hosts-dns --forward-zone=test etc/hosts/test |
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foo A 127.0.0.1 |
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bar A 127.0.0.2 |
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And correspondingly, the reverse zone for 127.0.0.0/8: |
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$ pvl.hosts-dns --reverse-zone=127 etc/hosts/test |
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1.0.0 PTR foo.test. |
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2.0.0 PTR bar.test. |
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And the associated DHCP hosts: |
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$ bin/pvl.hosts-dhcp etc/hosts/test |
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host foo { |
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option host-name foo; |
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hardware ethernet 00:11:22:33:44:55; |
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fixed-address 127.0.0.1; |
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} |
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host bar { |
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option host-name bar; |
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hardware ethernet 01:23:45:67:89:ab; |
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fixed-address 127.0.0.2; |
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} |
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=== Generated hosts === |
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The hosts file format supports something similar to bind9's $GENERATE directive for hosts: |
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[asdf{1-3}] |
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ip = 10.100.100.$ |
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$ bin/pvl.hosts-dns --forward-zone=asdf etc/hosts/asdf |
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asdf1@asdf A 10.100.100.1 |
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asdf2@asdf A 10.100.100.2 |
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asdf3@asdf A 10.100.100.3 |
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Note that the generate directives are interpreted and compiled directly by pvl.hosts. |
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Most of the $GENERATE options should be supported, with a little clever hackery: |
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[asdf{1-5/2}{0,2}] |
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ip = 10.100.100.$${10} |
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$ bin/pvl.hosts-dns --forward-zone=asdf2 etc/hosts/asdf2 |
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asdf01@asdf2 A 10.100.100.11 |
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asdf03@asdf2 A 10.100.100.13 |
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asdf05@asdf2 A 10.100.100.15 |
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This feature can be used for generating reverse delegations: |
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[foo-{240-247}] |
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forward = |
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reverse = $.240/29.0.0.10.in-addr.arpa |
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ip = 10.0.0.$ |
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$ bin/pvl.hosts-dns --reverse-zone=10 etc/hosts/reverse |
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240.0.0 CNAME 240.240/29.0.0.10.in-addr.arpa. |
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241.0.0 CNAME 241.240/29.0.0.10.in-addr.arpa. |
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242.0.0 CNAME 242.240/29.0.0.10.in-addr.arpa. |
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243.0.0 CNAME 243.240/29.0.0.10.in-addr.arpa. |
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244.0.0 CNAME 244.240/29.0.0.10.in-addr.arpa. |
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245.0.0 CNAME 245.240/29.0.0.10.in-addr.arpa. |
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246.0.0 CNAME 246.240/29.0.0.10.in-addr.arpa. |
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247.0.0 CNAME 247.240/29.0.0.10.in-addr.arpa. |
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=== DHCP Options === |
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The hosts need not specify any fixed ip address, leaving IP address allocation to dhcpd: |
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[foo] |
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ethernet = 00:11:22:33:44:55 |
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$ bin/pvl.hosts-dhcp etc/hosts/dhcp1 |
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host foo { |
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option host-name foo; |
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hardware ethernet 00:11:22:33:44:55; |
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} |
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=== DHCP Boot options === |
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The hosts can specify DHCP boot server/file options: |
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[foo] |
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ethernet = 00:11:22:33:44:55 |
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boot = boot.lan:debian/wheezy/pxelinux.0 |
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$ bin/pvl.hosts-dhcp etc/hosts/boot.dhcp |
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host foo { |
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option host-name foo; |
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hardware ethernet 00:11:22:33:44:55; |
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next-server boot.lan; |
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filename debian/wheezy/pxelinux.0; |
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} |
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