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Add command to resolve a hostname. Returns True or raises NotFound.

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Note that this doesn't rely on IPA having a configured DNS server.
It passes the host name to the resolver and doesn't try to do a lookup
within the IPA DNS directly (e.g. no internal LDAP search).

Tries to determine if a domain is included and if not then the IPA
domain is added. This won't do the right thing if there are multiple
configured subdomains.

ticket 106
This commit is contained in:
Rob Crittenden 2010-09-20 11:57:53 -04:00
parent 4f2f016dd5
commit 89d2280a79
1 changed files with 36 additions and 0 deletions
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36
ipalib/plugins/dns.py
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@ -56,6 +56,12 @@ EXAMPLES:
Delete zone example.com with all resource records:
ipa dns-delete example.com
Resolve a host name to see if it exists (will add default IPA domain
if one is not included):
ipa dns-resolve www.example.com
ipa dns-resolve www
"""
# A few notes about the LDAP schema to make this plugin more understandable:
@ -71,6 +77,7 @@ from ipalib import Object, Command
from ipalib import Flag, Int, Str, StrEnum
from ipalib import _, ngettext
from ipalib.output import Output, standard_entry, standard_list_of_entries
from ipapython import dnsclient
# parent DN
_zone_container_dn = api.env.container_dns
@ -833,3 +840,32 @@ class dns_show_rr(Command):
textui.print_entry(entry_attrs)
api.register(dns_show_rr)
class dns_resolve(Command):
"""
Resolve a host name in DNS
"""
has_output = output.standard_value
msg_summary = _('Found \'%(value)s\'')
takes_args = (
Str('hostname',
label=_('Hostname'),
),
)
def execute(self, *args, **options):
query=args[0]
if query.find(api.env.domain) == -1 and query.find('.') == -1:
query = '%s.%s.' % (query, api.env.domain)
if query[-1] != '.':
query = query + '.'
rr = dnsclient.query(query, dnsclient.DNS_C_IN, dnsclient.DNS_T_A)
self.log.debug('%s' % rr)
if len(rr) == 0:
raise errors.NotFound(reason=_('Host \'%(host)s\' not found' % {'host':query}))
return dict(result=True, value=query)
api.register(dns_resolve)