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ansible/setup
Sundar Raman 62e082a1c7 (Re #882) Handle errors in get_interfaces 
If there is an error in how interfaces are configured (or only one set, like IPv6),
the setup command should not error out.
2012-08-15 19:22:05 -04:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
import array
import fcntl
import glob
import platform
import re
import socket
import struct
try:
import selinux
HAVE_SELINUX=True
except ImportError:
HAVE_SELINUX=False
try:
import json
except ImportError:
import simplejson as json
class Facts(object):
"""
This class should only attempt to populate those facts that
are mostly generic to all systems. This includes platform facts,
service facts (eg. ssh keys or selinux), and distribution facts.
Anything that requires extensive code or may have more than one
possible implementation to establish facts for a given topic should
subclass Facts.
"""
_I386RE = re.compile(r'i[3456]86')
# For the most part, we assume that platform.dist() will tell the truth.
# This is the fallback to handle unknowns or exceptions
OSDIST_DICT = { '/etc/redhat-release': 'RedHat',
'/etc/vmware-release': 'VMwareESX' }
SELINUX_MODE_DICT = { 1: 'enforcing', 0: 'permissive', -1: 'disabled' }
def __init__(self):
self.facts = {}
self.get_platform_facts()
self.get_distribution_facts()
self.get_public_ssh_host_keys()
self.get_selinux_facts()
def populate(self):
return self.facts
# Platform
# patform.system() can be Linux, Darwin, Java, or Windows
def get_platform_facts(self):
self.facts['system'] = platform.system()
self.facts['kernel'] = platform.release()
self.facts['machine'] = platform.machine()
self.facts['python_version'] = platform.python_version()
self.facts['fqdn'] = socket.getfqdn()
self.facts['hostname'] = self.facts['fqdn'].split('.')[0]
if self.facts['machine'] == 'x86_64':
self.facts['architecture'] = self.facts['machine']
elif Facts._I386RE.search(self.facts['machine']):
self.facts['architecture'] = 'i386'
else:
self.facts['architecture'] = self.facts['machine']
if self.facts['system'] == 'Linux':
self.get_distribution_facts()
# platform.dist() is deprecated in 2.6
# in 2.6 and newer, you should use platform.linux_distribution()
def get_distribution_facts(self):
dist = platform.dist()
self.facts['distribution'] = dist[0].capitalize() or 'NA'
self.facts['distribution_version'] = dist[1] or 'NA'
self.facts['distribution_release'] = dist[2] or 'NA'
# Try to handle the exceptions now ...
for (path, name) in Facts.OSDIST_DICT.items():
if os.path.exists(path):
if self.facts['distribution'] == 'Fedora':
pass
elif name == 'RedHat':
data = get_file_content(path)
if 'Red Hat' in data:
self.facts['distribution'] = name
else:
self.facts['distribution'] = data.split()[0]
else:
self.facts['distribution'] = name
def get_public_ssh_host_keys(self):
dsa = get_file_content('/etc/ssh/ssh_host_dsa_key.pub')
rsa = get_file_content('/etc/ssh/ssh_host_rsa_key.pub')
if dsa is None:
dsa = 'NA'
else:
self.facts['ssh_host_key_dsa_public'] = dsa.split()[1]
if rsa is None:
rsa = 'NA'
else:
self.facts['ssh_host_key_rsa_public'] = rsa.split()[1]
def get_selinux_facts(self):
if not HAVE_SELINUX:
self.facts['selinux'] = False
return
self.facts['selinux'] = {}
if not selinux.is_selinux_enabled():
self.facts['selinux']['status'] = 'disabled'
else:
self.facts['selinux']['status'] = 'enabled'
try:
self.facts['selinux']['policyvers'] = selinux.security_policyvers()
except OSError, e:
self.facts['selinux']['policyvers'] = 'unknown'
try:
(rc, configmode) = selinux.selinux_getenforcemode()
if rc == 0:
self.facts['selinux']['config_mode'] = Facts.SELINUX_MODE_DICT.get(configmode, 'unknown')
else:
self.facts['selinux']['config_mode'] = 'unknown'
except OSError, e:
self.facts['selinux']['config_mode'] = 'unknown'
try:
mode = selinux.security_getenforce()
self.facts['selinux']['mode'] = Facts.SELINUX_MODE_DICT.get(mode, 'unknown')
except OSError, e:
self.facts['selinux']['mode'] = 'unknown'
try:
(rc, policytype) = selinux.selinux_getpolicytype()
if rc == 0:
self.facts['selinux']['type'] = policytype
else:
self.facts['selinux']['type'] = 'unknown'
except OSError, e:
self.facts['selinux']['type'] = 'unknown'
class Hardware(Facts):
"""
This is a generic Hardware subclass of Facts. This should be further
subclassed to implement per platform. If you subclass this, it
should define:
- memfree_mb
- memtotal_mb
- swapfree_mb
- swaptotal_mb
- processor (a list)
- processor_cores
- processor_count
All subclasses MUST define platform.
"""
platform = 'Generic'
def __new__(cls, *arguments, **keyword):
subclass = cls
for sc in Hardware.__subclasses__():
if sc.platform == platform.system():
subclass = sc
return super(cls, subclass).__new__(subclass, *arguments, **keyword)
def __init__(self):
Facts.__init__(self)
def populate(self):
return self.facts
class LinuxHardware(Hardware):
"""
Linux-specific subclass of Hardware. Defines memory and CPU facts:
- memfree_mb
- memtotal_mb
- swapfree_mb
- swaptotal_mb
- processor (a list)
- processor_cores
- processor_count
In addition, it also defines number of DMI facts.
"""
platform = 'Linux'
MEMORY_FACTS = ['MemTotal', 'SwapTotal', 'MemFree', 'SwapFree']
# DMI bits
DMI_DICT = dict(
form_factor = '/sys/devices/virtual/dmi/id/chassis_type',
product_name = '/sys/devices/virtual/dmi/id/product_name',
product_serial = '/sys/devices/virtual/dmi/id/product_serial',
product_uuid = '/sys/devices/virtual/dmi/id/product_uuid',
product_version = '/sys/devices/virtual/dmi/id/product_version',
system_vendor = '/sys/devices/virtual/dmi/id/sys_vendor',
bios_date = '/sys/devices/virtual/dmi/id/bios_date',
bios_version = '/sys/devices/virtual/dmi/id/bios_version'
)
# DMI SPEC -- http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_2.7.0.pdf
FORM_FACTOR = [ "Unknown", "Other", "Unknown", "Desktop",
"Low Profile Desktop", "Pizza Box", "Mini Tower", "Tower",
"Portable", "Laptop", "Notebook", "Hand Held", "Docking Station",
"All In One", "Sub Notebook", "Space-saving", "Lunch Box",
"Main Server Chassis", "Expansion Chassis", "Sub Chassis",
"Bus Expansion Chassis", "Peripheral Chassis", "RAID Chassis",
"Rack Mount Chassis", "Sealed-case PC", "Multi-system",
"CompactPCI", "AdvancedTCA", "Blade" ]
def __init__(self):
Hardware.__init__(self)
def populate(self):
self.get_cpu_facts()
self.get_memory_facts()
self.get_dmi_facts()
return self.facts
def get_memory_facts(self):
if not os.access("/proc/meminfo", os.R_OK):
return
for line in open("/proc/meminfo").readlines():
data = line.split(":", 1)
key = data[0]
if key in LinuxHardware.MEMORY_FACTS:
val = data[1].strip().split(' ')[0]
self.facts["%s_mb" % key.lower()] = long(val) / 1024
def get_cpu_facts(self):
i = 0
physid = 0
sockets = {}
if not os.access("/proc/cpuinfo", os.R_OK):
return
self.facts['processor'] = []
for line in open("/proc/cpuinfo").readlines():
data = line.split(":", 1)
key = data[0].strip()
if key == 'model name':
if 'processor' not in self.facts:
self.facts['processor'] = []
self.facts['processor'].append(data[1].strip())
i += 1
elif key == 'physical id':
physid = data[1].strip()
if physid not in sockets:
sockets[physid] = 1
elif key == 'cpu cores':
sockets[physid] = int(data[1].strip())
if len(sockets) > 0:
self.facts['processor_count'] = len(sockets)
self.facts['processor_cores'] = reduce(lambda x, y: x + y, sockets.values())
else:
self.facts['processor_count'] = i
self.facts['processor_cores'] = 'NA'
def get_dmi_facts(self):
for (key,path) in LinuxHardware.DMI_DICT.items():
data = get_file_content(path)
if data is not None:
if key == 'form_factor':
try:
self.facts['form_factor'] = LinuxHardware.FORM_FACTOR[int(data)]
except IndexError, e:
self.facts['form_factor'] = 'unknown (%s)' % data
else:
self.facts[key] = data
else:
self.facts[key] = 'NA'
class SunOSHardware(Hardware):
"""
In addition to the generic memory and cpu facts, this also sets
swap_reserved_mb and swap_allocated_mb that is available from *swap -s*.
"""
platform = 'SunOS'
def __init__(self):
Hardware.__init__(self)
def populate(self):
self.get_cpu_facts()
self.get_memory_facts()
return self.facts
def get_cpu_facts(self):
cmd = subprocess.Popen("/usr/sbin/psrinfo -v", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
self.facts['processor'] = []
for line in out.split('\n'):
if 'processor operates' in line:
if 'processor' not in self.facts:
self.facts['processor'] = []
self.facts['processor'].append(line.strip())
self.facts['processor_cores'] = 'NA'
self.facts['processor_count'] = len(self.facts['processor'])
def get_memory_facts(self):
cmd = subprocess.Popen("/usr/sbin/prtconf", shell=False,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
for line in out.split('\n'):
if 'Memory size' in line:
self.facts['memtotal_mb'] = line.split()[2]
cmd = subprocess.Popen("/usr/sbin/swap -s", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
allocated = long(out.split()[1][:-1])
reserved = long(out.split()[5][:-1])
used = long(out.split()[8][:-1])
free = long(out.split()[10][:-1])
self.facts['swapfree_mb'] = free / 1024
self.facts['swaptotal_mb'] = (free + used) / 1024
self.facts['swap_allocated_mb'] = allocated / 1024
self.facts['swap_reserved_mb'] = reserved / 1024
class FreeBSDHardware(Hardware):
"""
FreeBSD-specific subclass of Hardware. Defines memory and CPU facts:
- memfree_mb
- memtotal_mb
- swapfree_mb
- swaptotal_mb
- processor (a list)
- processor_cores
- processor_count
"""
platform = 'FreeBSD'
DMESG_BOOT = '/var/run/dmesg.boot'
def __init__(self):
Hardware.__init__(self)
def populate(self):
self.get_cpu_facts()
self.get_memory_facts()
return self.facts
def get_cpu_facts(self):
self.facts['processor'] = []
cmd = subprocess.Popen("/sbin/sysctl -n hw.ncpu", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
self.facts['processor_count'] = out.strip()
for line in open(FreeBSDHardware.DMESG_BOOT).readlines():
if 'CPU:' in line:
cpu = re.sub(r'CPU:\s+', r"", line)
self.facts['processor'].append(cpu.strip())
if 'Logical CPUs per core' in line:
self.facts['processor_cores'] = line.split()[4]
def get_memory_facts(self):
cmd = subprocess.Popen("/sbin/sysctl vm.stats", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
for line in out.split('\n'):
data = line.split()
if 'vm.stats.vm.v_page_size' in line:
pagesize = long(data[1])
if 'vm.stats.vm.v_page_count' in line:
pagecount = long(data[1])
if 'vm.stats.vm.v_free_count' in line:
freecount = long(data[1])
self.facts['memtotal_mb'] = pagesize * pagecount / 1024 / 1024
self.facts['memfree_mb'] = pagesize * freecount / 1024 / 1024
# Get swapinfo. swapinfo output looks like:
# Device 1M-blocks Used Avail Capacity
# /dev/ada0p3 314368 0 314368 0%
#
cmd = subprocess.Popen("/usr/sbin/swapinfo -m", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
lines = out.split('\n')
if len(lines[-1]) == 0:
lines.pop()
data = lines[-1].split()
self.facts['swaptotal_mb'] = data[1]
self.facts['swapfree_mb'] = data[3]
class Network(Facts):
"""
This is a generic Network subclass of Facts. This should be further
subclassed to implement per platform. If you subclass this,
you must define:
- interfaces (a list of interface names)
- interface_<name> dictionary of ipv4, ipv6, and mac address information.
All subclasses MUST define platform.
"""
platform = 'Generic'
IPV6_SCOPE = { '0' : 'global',
'10' : 'host',
'20' : 'link',
'40' : 'admin',
'50' : 'site',
'80' : 'organization' }
def __new__(cls, *arguments, **keyword):
subclass = cls
for sc in Network.__subclasses__():
if sc.platform == platform.system():
subclass = sc
return super(cls, subclass).__new__(subclass, *arguments, **keyword)
def __init__(self):
Facts.__init__(self)
def populate(self):
return self.facts
class LinuxNetwork(Network):
"""
This is a Linux-specific subclass of Network. It defines
- interfaces (a list of interface names)
- interface_<name> dictionary of ipv4, ipv6, and mac address information.
- all_ipv4_addresses and all_ipv6_addresses: lists of all configured addresses.
- ipv4_address and ipv6_address: the first non-local address for each family.
"""
platform = 'Linux'
def __init__(self):
Network.__init__(self)
def populate(self):
ip_path = self.get_ip_path()
default_ipv4, default_ipv6 = self.get_default_interfaces(ip_path)
interfaces, ips = self.get_interfaces_info(ip_path, default_ipv4, default_ipv6)
self.facts['interfaces'] = interfaces.keys()
for iface in interfaces:
self.facts[iface] = interfaces[iface]
self.facts['default_ipv4'] = default_ipv4
self.facts['default_ipv6'] = default_ipv6
self.facts['all_ipv4_addresses'] = ips['all_ipv4_addresses']
self.facts['all_ipv6_addresses'] = ips['all_ipv6_addresses']
return self.facts
def get_ip_path(self):
paths = ['/sbin/ip', '/usr/sbin/ip']
ip_path = None
for path in paths:
if os.path.exists(path):
ip_path = path
break
return ip_path
def get_default_interfaces(self, ip_path):
# Use the commands:
# ip -4 route get 8.8.8.8 -> Google public DNS
# ip -6 route get 2404:6800:400a:800::1012 -> ipv6.google.com
# to find out the default outgoing interface, address, and gateway
command = dict(
v4 = [ip_path, '-4', 'route', 'get', '8.8.8.8'],
v6 = [ip_path, '-6', 'route', 'get', '2404:6800:400a:800::1012']
)
interface = dict(v4 = {}, v6 = {})
for v in 'v4', 'v6':
output = subprocess.Popen(command[v], stdout=subprocess.PIPE).communicate()[0]
if not output:
# v6 routing may result in
# RTNETLINK answers: Invalid argument
continue
words = output.split('\n')[0].split()
# A valid output starts with the queried address on the first line
if words[0] == command[v][-1]:
for i in range(len(words) - 1):
if words[i] == 'dev':
interface[v]['interface'] = words[i+1]
elif words[i] == 'src':
interface[v]['address'] = words[i+1]
elif words[i] == 'via' and words[i+1] != command[v][-1]:
interface[v]['gateway'] = words[i+1]
return interface['v4'], interface['v6']
def get_interfaces_info(self, ip_path, default_ipv4, default_ipv6):
interfaces = {}
ips = dict(
all_ipv4_addresses = [],
all_ipv6_addresses = [],
)
output = subprocess.Popen([ip_path, 'addr', 'show'], stdout=subprocess.PIPE).communicate()[0]
for line in output.split('\n'):
if line:
words = line.split()
if not line.startswith(' '):
device = words[1][0:-1]
mtu = words[4]
elif words[0].startswith('link/'):
iface_type = words[0].split('/')[1]
if iface_type == 'void':
macaddress = 'unknown'
else:
macaddress = words[1]
elif words[0] == 'inet':
address, netmask_length = words[1].split('/')
address_bin = struct.unpack('!L', socket.inet_aton(address))[0]
netmask_bin = (1<<32) - (1<<32>>int(netmask_length))
netmask = socket.inet_ntoa(struct.pack('!L', netmask_bin))
network = socket.inet_ntoa(struct.pack('!L', address_bin & netmask_bin))
iface = words[-1]
# If an interface has multiple IPv4 addresses, make up an
# interface name for each address
if iface in interfaces:
i = 0
while '{0}_{1}'.format(iface, i) in interfaces:
i += 1
iface = '{0}_{1}'.format(iface, i)
interfaces[iface] = {}
interfaces[iface]['macaddress'] = macaddress
interfaces[iface]['mtu'] = mtu
interfaces[iface]['type'] = iface_type
interfaces[iface]['device'] = device
interfaces[iface]['ipv4'] = {'address': address,
'netmask': netmask,
'network': network}
# If this is the default address, update default_ipv4
if 'address' in default_ipv4 and default_ipv4['address'] == address:
default_ipv4['netmask'] = netmask
default_ipv4['network'] = network
default_ipv4['macaddress'] = macaddress
default_ipv4['mtu'] = mtu
default_ipv4['type'] = iface_type
default_ipv4['alias'] = words[-1]
if not address.startswith('127.'):
ips['all_ipv4_addresses'].append(address)
elif words[0] == 'inet6':
address, prefix = words[1].split('/')
scope = words[3]
iface = device
if iface not in interfaces:
interfaces[iface] = {}
interfaces[iface]['macaddress'] = macaddress
interfaces[iface]['mtu'] = mtu
interfaces[iface]['device'] = device
if 'ipv6' not in interfaces[iface]:
interfaces[iface]['ipv6'] = []
interfaces[iface]['ipv6'].append( {
'address': address,
'prefix': prefix,
'scope': scope} )
# If this is the default address, update default_ipv6
if 'address' in default_ipv6 and default_ipv6['address'] == address:
default_ipv6['prefix'] = prefix
default_ipv6['scope'] = scope
default_ipv6['macaddress'] = macaddress
default_ipv6['mtu'] = mtu
default_ipv6['type'] = iface_type
if not address == '::1':
ips['all_ipv6_addresses'].append(address)
return interfaces, ips
class Virtual(Facts):
"""
This is a generic Virtual subclass of Facts. This should be further
subclassed to implement per platform. If you subclass this,
you should define:
- virtualization_type
- virtualization_role
All subclasses MUST define platform.
"""
def __new__(cls, *arguments, **keyword):
subclass = cls
for sc in Virtual.__subclasses__():
if sc.platform == platform.system():
subclass = sc
return super(cls, subclass).__new__(subclass, *arguments, **keyword)
def __init__(self):
Facts.__init__(self)
def populate(self):
return self.facts
class LinuxVirtual(Virtual):
"""
This is a Linux-specific subclass of Virtual. It defines
- virtualization_type
- virtualization_role
"""
platform = 'Linux'
def __init__(self):
Virtual.__init__(self)
def populate(self):
self.get_virtual_facts()
return self.facts
def get_virtual_facts(self):
if os.path.exists("/proc/xen"):
self.facts['virtualization_type'] = 'xen'
if os.path.exists('/proc/xen/capabilities'):
self.facts['virtualization_role'] = 'host'
else:
self.facts['virtualization_role'] = 'guest'
elif os.path.exists('/proc/vz'):
self.facts['virtualization_type'] = 'openvz'
if os.path.exists('/proc/vz/version'):
self.facts['virtualization_role'] = 'host'
else:
self.facts['virtualization_role'] = 'guest'
elif get_file_content('/sys/devices/virtual/dmi/id/product_name') in ['KVM','Bochs']:
self.facts['virtualization_type'] = 'kvm'
self.facts['virtualization_role'] = 'guest'
elif get_file_content('/sys/devices/virtual/dmi/id/sys_vendor') == 'VMware, Inc.':
self.facts['virtualization_type'] = 'VMware'
self.facts['virtualization_role'] = 'guest'
elif get_file_content('/sys/devices/virtual/dmi/id/sys_vendor') == 'Microsoft Corporation':
self.facts['virtualization_type'] = 'VirtualPC'
self.facts['virtualization_role'] = 'guest'
elif os.path.exists("/proc/modules"):
modules = []
for line in open("/proc/modules").readlines():
data = line.split(" ", 1)
modules.append(data[0])
if 'kvm' in modules:
self.facts['virtualization_type'] = 'kvm'
self.facts['virtualization_role'] = 'host'
elif 'vboxdrv' in modules:
self.facts['virtualization_type'] = 'virtualbox'
self.facts['virtualization_role'] = 'host'
elif 'vboxguest' in modules:
self.facts['virtualization_type'] = 'virtualbox'
self.facts['virtualization_role'] = 'guest'
def get_file_content(path):
data = None
if os.path.exists(path) and os.access(path, os.R_OK):
data = open(path).read().strip()
if len(data) == 0:
data = None
return data
def ansible_facts():
facts = {}
facts.update(Facts().populate())
facts.update(Hardware().populate())
facts.update(Network().populate())
facts.update(Virtual().populate())
return facts
# ===========================================
def run_setup(module):
setup_options = {}
facts = ansible_facts()
for (k, v) in facts.items():
setup_options["ansible_%s" % k] = v
# if facter is installed, and we can use --json because
# ruby-json is ALSO installed, include facter data in the JSON
if os.path.exists("/usr/bin/facter"):
cmd = subprocess.Popen("/usr/bin/facter --json", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
facter = True
try:
facter_ds = json.loads(out)
except:
facter = False
if facter:
for (k,v) in facter_ds.items():
setup_options["facter_%s" % k] = v
# ditto for ohai, but just top level string keys
# because it contains a lot of nested stuff we can't use for
# templating w/o making a nicer key for it (TODO)
if os.path.exists("/usr/bin/ohai"):
cmd = subprocess.Popen("/usr/bin/ohai", shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
ohai = True
try:
ohai_ds = json.loads(out)
except:
ohai = False
if ohai:
for (k,v) in ohai_ds.items():
if type(v) == str or type(v) == unicode:
k2 = "ohai_%s" % k
setup_options[k2] = v
setup_result = {}
setup_result['ansible_facts'] = setup_options
# hack to keep --verbose from showing all the setup module results
setup_result['verbose_override'] = True
return setup_result
def main():
module = AnsibleModule(
argument_spec = dict()
)
data = run_setup(module)
module.exit_json(**data)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()
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