[Bug 1406] document how to extend the range of static IP addresses

[drift@skolelinux.org]

http://bugs.skolelinux.org/show_bug.cgi?id=1406


Joakim Seeberg Ravnskjær <kontakt@seebergit.dk> changed:

           What    |Removed                     |Added
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                 CC|                            |kontakt@seebergit.dk




--- Comment #2 from Joakim Seeberg Ravnskjær <kontakt@seebergit.dk>  2010-01-26 09:35:16 ---
I got this from the gathering in Oslo. As I remember it is used to
extend/shrink dhcp ranges in lenny. If someone can confirm then documenting
should be strait forward.

#!/usr/bin/python
# Author: John S. Skogtvedt <jss@bzz.no>
# Generates a LDIF based on the ranges variable.

ranges = '''
ltspserver00-19 10.0.2.10
printer00-19    10.0.2.30
static00-49     10.0.2.50
dhcp000-155     10.0.2.100
dhcp156-399     10.0.3.0    # ends at 10.0.3.243
ltsp001-253     192.168.0.1 # ltsp200-253 are dynamic
misc00-49       10.0.4.0
'''

a_template = \
'''dn: dc=%(hostname)s,dc=intern,ou=hosts,dc=skole,dc=skolelinux,dc=no
objectclass: top
objectclass: dnsdomain
objectclass: domainrelatedobject
dc: %(hostname)s
arecord: %(hostip)s
associateddomain: %(hostname)s.intern
'''

ptr_template = \
'''dn: %(ip_rev_dn)s,dc=in-addr,dc=arpa,ou=hosts,dc=skole,dc=skolelinux,dc=no
objectclass: top
objectclass: dnsdomain2
objectclass: domainrelatedobject
dc: %(ip_last_part)s
ptrrecord: %(hostname)s.intern
associateddomain: %(ip_rev)s.in-addr.arpa
'''

import re, sys
re_range = re.compile('^(.*?)(\d+)-(\d+)\s+([\d.]+)')
for line in ranges.splitlines():
    m = re_range.search(line)
    if not m:
        continue
    base, begin, end, ip = m.groups() # ('ltspserver', '00', '19', '10.0.2.10')
    begin_l = len(begin)
    begin = int(begin)
    end = int(end)
    ip_begin = int(ip.split('.')[-1]) # 10
    ip_base = ip[0:ip.rindex('.')+1]  # 10.0.2.
    #print >>sys.stderr, m.groups(), ip_begin

    for i in xrange( (end-begin)+1 ):
        formatstr = '%s%0' + str(begin_l) + 'd' # '%s%02d'
        hostname = formatstr % (base, i + begin) # 'ltspserver00'

        hostip = '%s%d' % (ip_base, i + ip_begin)
        ip_rev = hostip.split('.')[::-1] # ['10', '2', '0', '10']
        ip_rev_dn = ''.join(['dc=%s,' % x for x in ip_rev])[:-1] #
'dc=10,dc=2,dc=0,dc=10'
        ip_last_part = ip_rev[0] # '10'
        ip_rev = '.'.join(ip_rev) # '10.2.0.10'
        #print >>sys.stderr, hostname, hostip
        print a_template % locals()
        print ptr_template % locals()


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