def resolve_ip_addresses_nss(fqdn):
"""Get list of IP addresses for given host (using NSS/getaddrinfo).
:returns:
list of IP addresses as UnsafeIPAddress objects
"""
# it would be good disable search list processing from resolv.conf
# to avoid cases where we get IP address for an totally different name
# but there is no way to do this using getaddrinfo parameters
try:
addrinfos = socket.getaddrinfo(fqdn, None,
socket.AF_UNSPEC, socket.SOCK_STREAM)
except socket.error as ex:
if ex.errno == socket.EAI_NODATA or ex.errno == socket.EAI_NONAME:
logger.debug('Name %s does not have any address: %s', fqdn, ex)
return set()
else:
raise
# accept whatever we got from NSS
ip_addresses = set()
for ai in addrinfos:
try:
ip = ipautil.UnsafeIPAddress(ai[4][0])
except ValueError as ex:
# getaddinfo may return link-local address other similar oddities
# which are not accepted by CheckedIPAddress - skip these
logger.warning('Name %s resolved to an unacceptable IP '
'address %s: %s', fqdn, ai[4][0], ex)
else:
ip_addresses.add(ip)
logger.debug('Name %s resolved to %s', fqdn, ip_addresses)
return ip_addresses
def get_server_ip_address(host_name, unattended, setup_dns, ip_addresses):
hostaddr = resolve_ip_addresses_nss(host_name)
if hostaddr.intersection(
{ipautil.UnsafeIPAddress(ip) for ip in ['127.0.0.1', '::1']}):
print("The hostname resolves to the localhost address (127.0.0.1/::1)", file=sys.stderr)
print("Please change your /etc/hosts file so that the hostname", file=sys.stderr)
print("resolves to the ip address of your network interface.", file=sys.stderr)
print("The KDC service does not listen on localhost", file=sys.stderr)
print("", file=sys.stderr)
print("Please fix your /etc/hosts file and restart the setup program", file=sys.stderr)
raise ScriptError()
ips = []
if len(hostaddr):
for ha in hostaddr:
try:
ips.append(ipautil.CheckedIPAddress(ha))
except ValueError as e:
logger.warning("Invalid IP address %s for %s: %s",
ha, host_name, unicode(e))
if not ips and not ip_addresses:
if not unattended:
ip_addresses = read_ip_addresses()
if ip_addresses:
if setup_dns:
ips = ip_addresses
else:
# all specified addresses was resolved for this host
if set(ip_addresses) <= set(ips):
ips = ip_addresses
else:
print("Error: the hostname resolves to IP address(es) that are different", file=sys.stderr)
print("from those provided on the command line. Please fix your DNS", file=sys.stderr)
print("or /etc/hosts file and restart the installation.", file=sys.stderr)
print("Provided but not resolved address(es): %s" % \
", ".join(str(ip) for ip in (set(ip_addresses) - set(ips))), file=sys.stderr)
raise ScriptError()
if not ips:
print("No usable IP address provided nor resolved.", file=sys.stderr)
raise ScriptError()
for ip_address in ips:
# check /etc/hosts sanity
hosts_record = record_in_hosts(str(ip_address))
if hosts_record is not None:
primary_host = hosts_record[1][0]
if primary_host != host_name:
print("Error: there is already a record in /etc/hosts for IP address %s:" \
% ip_address, file=sys.stderr)
print(hosts_record[0], " ".join(hosts_record[1]), file=sys.stderr)
print("Chosen hostname %s does not match configured canonical hostname %s" \
% (host_name, primary_host), file=sys.stderr)
print("Please fix your /etc/hosts file and restart the installation.", file=sys.stderr)
raise ScriptError()
return ips
def resolve_ip_addresses_nss(fqdn):
"""Get list of IP addresses for given host (using NSS/getaddrinfo).
:returns:
list of IP addresses as UnsafeIPAddress objects
"""
# make sure the name is fully qualified
# so search path from resolv.conf does not apply
fqdn = str(dnsutil.DNSName(fqdn).make_absolute())
try:
addrinfos = socket.getaddrinfo(fqdn, None,
socket.AF_UNSPEC, socket.SOCK_STREAM)
except socket.error as ex:
if ex.errno == socket.EAI_NODATA or ex.errno == socket.EAI_NONAME:
root_logger.debug('Name %s does not have any address: %s',
fqdn, ex)
return set()
else:
raise
# accept whatever we got from NSS
ip_addresses = set()
for ai in addrinfos:
try:
ip = ipautil.UnsafeIPAddress(ai[4][0])
except ValueError as ex:
# getaddinfo may return link-local address other similar oddities
# which are not accepted by CheckedIPAddress - skip these
root_logger.warning('Name %s resolved to an unacceptable IP '
'address %s: %s', fqdn, ai[4][0], ex)
else:
ip_addresses.add(ip)
root_logger.debug('Name %s resolved to %s', fqdn, ip_addresses)
return ip_addresses
