def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
"""Get hostname or fqdn from the datasource. Look it up if desired.
@param fqdn: Boolean, set True to return hostname with domain.
@param resolve_ip: Boolean, set True to attempt to resolve an ipv4
address provided in local-hostname meta-data.
@param metadata_only: Boolean, set True to avoid looking up hostname
if meta-data doesn't have local-hostname present.
@return: hostname or qualified hostname. Optionally return None when
metadata_only is True and local-hostname data is not available.
"""
defdomain = "localdomain"
defhost = "localhost"
domain = defdomain
if not self.metadata or 'local-hostname' not in self.metadata:
if metadata_only:
return None
# this is somewhat questionable really.
# the cloud datasource was asked for a hostname
# and didn't have one. raising error might be more appropriate
# but instead, basically look up the existing hostname
toks = []
hostname = util.get_hostname()
hosts_fqdn = util.get_fqdn_from_hosts(hostname)
if hosts_fqdn and hosts_fqdn.find(".") > 0:
toks = str(hosts_fqdn).split(".")
elif hostname and hostname.find(".") > 0:
toks = str(hostname).split(".")
elif hostname:
toks = [hostname, defdomain]
else:
toks = [defhost, defdomain]
else:
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
lhost = self.metadata['local-hostname']
if util.is_ipv4(lhost):
toks = []
if resolve_ip:
toks = util.gethostbyaddr(lhost)
if toks:
toks = str(toks).split('.')
else:
toks = ["ip-%s" % lhost.replace(".", "-")]
else:
toks = lhost.split(".")
if len(toks) > 1:
hostname = toks[0]
domain = '.'.join(toks[1:])
else:
hostname = toks[0]
if fqdn and domain != defdomain:
return "%s.%s" % (hostname, domain)
else:
return hostname
def getfqdn(name=""):
name = name.strip()
if not name or name == "0.0.0.0":
name = util.get_hostname()
try:
address = socket.getaddrinfo(name, None, 0, socket.SOCK_DGRAM, 0,
socket.AI_CANONNAME)
except socket.error:
pass
else:
for addr in address:
if addr[3]:
name = addr[3]
break
return name
def get_hostname(self, fqdn=False, resolve_ip=False):
defdomain = "localdomain"
defhost = "localhost"
domain = defdomain
if not self.metadata or 'local-hostname' not in self.metadata:
# this is somewhat questionable really.
# the cloud datasource was asked for a hostname
# and didn't have one. raising error might be more appropriate
# but instead, basically look up the existing hostname
toks = []
hostname = util.get_hostname()
fqdn = util.get_fqdn_from_hosts(hostname)
if fqdn and fqdn.find(".") > 0:
toks = str(fqdn).split(".")
elif hostname and hostname.find(".") > 0:
toks = str(hostname).split(".")
elif hostname:
toks = [hostname, defdomain]
else:
toks = [defhost, defdomain]
else:
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
lhost = self.metadata['local-hostname']
if util.is_ipv4(lhost):
toks = []
if resolve_ip:
toks = util.gethostbyaddr(lhost)
if toks:
toks = str(toks).split('.')
else:
toks = ["ip-%s" % lhost.replace(".", "-")]
else:
toks = lhost.split(".")
if len(toks) > 1:
hostname = toks[0]
domain = '.'.join(toks[1:])
else:
hostname = toks[0]
if fqdn and domain != defdomain:
return "%s.%s" % (hostname, domain)
else:
return hostname
def get_hostname(self, fqdn=False, resolve_ip=False):
defdomain = "localdomain"
defhost = "localhost"
domain = defdomain
if not self.metadata or 'local-hostname' not in self.metadata:
# this is somewhat questionable really.
# the cloud datasource was asked for a hostname
# and didn't have one. raising error might be more appropriate
# but instead, basically look up the existing hostname
toks = []
hostname = util.get_hostname()
fqdn = util.get_fqdn_from_hosts(hostname)
if fqdn and fqdn.find(".") > 0:
toks = str(fqdn).split(".")
elif hostname:
toks = [hostname, defdomain]
else:
toks = [defhost, defdomain]
else:
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
lhost = self.metadata['local-hostname']
if util.is_ipv4(lhost):
toks = []
if resolve_ip:
toks = util.gethostbyaddr(lhost)
if toks:
toks = str(toks).split('.')
else:
toks = ["ip-%s" % lhost.replace(".", "-")]
else:
toks = lhost.split(".")
if len(toks) > 1:
hostname = toks[0]
domain = '.'.join(toks[1:])
else:
hostname = toks[0]
if fqdn:
return "%s.%s" % (hostname, domain)
else:
return hostname
def getfqdn(name=""):
"""Get fully qualified domain name from name.
An empty argument is interpreted as meaning the local host.
"""
# TODO(may want to promote this function to util.getfqdn)
# TODO(may want to extend util.get_hostname to accept fqdn=True param)
name = name.strip()
if not name or name == "0.0.0.0":
name = util.get_hostname()
try:
addrs = socket.getaddrinfo(name, None, 0, socket.SOCK_DGRAM, 0,
socket.AI_CANONNAME)
except socket.error:
pass
else:
for addr in addrs:
if addr[3]:
name = addr[3]
break
return name
def get_host_info():
"""
Returns host information such as the host name and network interfaces.
"""
# TODO(look to promote netifices use up in cloud-init netinfo funcs)
host_info = {
"network": {
"interfaces": {
"by-mac": collections.OrderedDict(),
"by-ipv4": collections.OrderedDict(),
"by-ipv6": collections.OrderedDict(),
},
},
}
hostname = getfqdn(util.get_hostname())
if hostname:
host_info["hostname"] = hostname
host_info["local-hostname"] = hostname
host_info["local_hostname"] = hostname
default_ipv4, default_ipv6 = get_default_ip_addrs()
if default_ipv4:
host_info[LOCAL_IPV4] = default_ipv4
if default_ipv6:
host_info[LOCAL_IPV6] = default_ipv6
by_mac = host_info["network"]["interfaces"]["by-mac"]
by_ipv4 = host_info["network"]["interfaces"]["by-ipv4"]
by_ipv6 = host_info["network"]["interfaces"]["by-ipv6"]
ifaces = netifaces.interfaces()
for dev_name in ifaces:
addr_fams = netifaces.ifaddresses(dev_name)
af_link = addr_fams.get(netifaces.AF_LINK)
af_inet4 = addr_fams.get(netifaces.AF_INET)
af_inet6 = addr_fams.get(netifaces.AF_INET6)
mac = None
if af_link and "addr" in af_link[0]:
mac = af_link[0]["addr"]
# Do not bother recording localhost
if mac == "00:00:00:00:00:00":
continue
if mac and (af_inet4 or af_inet6):
key = mac
val = {}
if af_inet4:
af_inet4_vals = []
for ip_info in af_inet4:
if not is_valid_ip_addr(ip_info["addr"]):
continue
af_inet4_vals.append(ip_info)
val["ipv4"] = af_inet4_vals
if af_inet6:
af_inet6_vals = []
for ip_info in af_inet6:
if not is_valid_ip_addr(ip_info["addr"]):
continue
af_inet6_vals.append(ip_info)
val["ipv6"] = af_inet6_vals
by_mac[key] = val
if af_inet4:
for ip_info in af_inet4:
key = ip_info["addr"]
if not is_valid_ip_addr(key):
continue
val = copy.deepcopy(ip_info)
del val["addr"]
if mac:
val["mac"] = mac
by_ipv4[key] = val
if af_inet6:
for ip_info in af_inet6:
key = ip_info["addr"]
if not is_valid_ip_addr(key):
continue
val = copy.deepcopy(ip_info)
del val["addr"]
if mac:
val["mac"] = mac
by_ipv6[key] = val
return host_info
def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
"""Get hostname or fqdn from the datasource. Look it up if desired.
@param fqdn: Boolean, set True to return hostname with domain.
@param resolve_ip: Boolean, set True to attempt to resolve an ipv4
address provided in local-hostname meta-data.
@param metadata_only: Boolean, set True to avoid looking up hostname
if meta-data doesn't have local-hostname present.
@return: a DataSourceHostname namedtuple
<hostname or qualified hostname>, <is_default> (str, bool).
is_default is a bool and
it's true only if hostname is localhost and was
returned by util.get_hostname() as a default.
This is used to differentiate with a user-defined
localhost hostname.
Optionally return (None, False) when
metadata_only is True and local-hostname data is not available.
"""
defdomain = "localdomain"
defhost = "localhost"
domain = defdomain
is_default = False
if not self.metadata or not self.metadata.get("local-hostname"):
if metadata_only:
return DataSourceHostname(None, is_default)
# this is somewhat questionable really.
# the cloud datasource was asked for a hostname
# and didn't have one. raising error might be more appropriate
# but instead, basically look up the existing hostname
toks = []
hostname = util.get_hostname()
if hostname == "localhost":
# default hostname provided by socket.gethostname()
is_default = True
hosts_fqdn = util.get_fqdn_from_hosts(hostname)
if hosts_fqdn and hosts_fqdn.find(".") > 0:
toks = str(hosts_fqdn).split(".")
elif hostname and hostname.find(".") > 0:
toks = str(hostname).split(".")
elif hostname:
toks = [hostname, defdomain]
else:
toks = [defhost, defdomain]
else:
# if there is an ipv4 address in 'local-hostname', then
# make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
lhost = self.metadata["local-hostname"]
if net.is_ipv4_address(lhost):
toks = []
if resolve_ip:
toks = util.gethostbyaddr(lhost)
if toks:
toks = str(toks).split(".")
else:
toks = ["ip-%s" % lhost.replace(".", "-")]
else:
toks = lhost.split(".")
if len(toks) > 1:
hostname = toks[0]
domain = ".".join(toks[1:])
else:
hostname = toks[0]
if fqdn and domain != defdomain:
hostname = "%s.%s" % (hostname, domain)
return DataSourceHostname(hostname, is_default)
