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ansible/setup
Stephen Fromm cfbd9b282b Add native facts to library/setup 
This collects various facts from the host so that it isn't necessary to
have facter or ohai installed.  It gets various platform/distribution
facts, information about the type of hardware, whether a virtual
environment and what type, assorted interface facts, and ssh host public
keys.  Most facts are flat.  The two exceptions are 'processor' and all
interface facts.  Interface facts are presented as:
    ansible_lo : {
        "macaddress": "00:00:00:00:00:00",
        "ipv4": { "address": "127.0.0.1", "netmask": "255.0.0.0" },
        "ipv6": [
                    { "address": "::1", "prefix": "128", "scope": "host" }
                ]
    }
2012-04-17 16:59:23 -07:00

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Python
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#!/usr/bin/python
# (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/>.
DEFAULT_ANSIBLE_SETUP = "/etc/ansible/setup"
import array
import fcntl
import glob
import sys
import os
import platform
import re
import shlex
import socket
import struct
import subprocess
import traceback
try:
import json
except ImportError:
import simplejson as json
_I386RE = re.compile(r'i[3456]86')
SIOCGIFCONF = 0x8912
SIOCGIFHWADDR = 0x8927
MEMORY_FACTS = ['MemTotal', 'SwapTotal', 'MemFree', 'SwapFree']
# DMI bits
DMI_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' }
# From smolt and DMI spec
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" ]
# 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' }
def get_file_content(path):
if os.path.exists(path) and os.access(path, os.R_OK):
data = open(path).read().strip()
if len(data) == 0:
data = None
else:
data = None
return data
# platform.dist() is deprecated in 2.6
# in 2.6 and newer, you should use platform.linux_distribution()
def get_distribution_facts(facts):
dist = platform.dist()
facts['distribution'] = dist[0].capitalize() or 'NA'
facts['distribution_version'] = dist[1] or 'NA'
facts['distribution_release'] = dist[2] or 'NA'
# Try to handle the exceptions now ...
for (path, name) in OSDIST_DICT.items():
if os.path.exists(path):
if facts['distribution'] == 'Fedora':
pass
elif name == 'RedHat':
data = get_file_content(path)
if 'Red Hat' in data:
facts['distribution'] = name
else:
facts['distribution'] = data.split()[0]
else:
facts['distribution'] = name
# Platform
# patform.system() can be Linux, Darwin, Java, or Windows
def get_platform_facts(facts):
facts['system'] = platform.system()
facts['kernel'] = platform.release()
facts['machine'] = platform.machine()
facts['python_version'] = platform.python_version()
if facts['machine'] == 'x86_64':
facts['architecture'] = facts['machine']
elif _I386RE.search(facts['machine']):
facts['architecture'] = 'i386'
else:
facts['archtecture'] = facts['machine']
if facts['system'] == 'Linux':
get_distribution_facts(facts)
def get_memory_facts(facts):
if not os.access("/proc/meminfo", os.R_OK):
return facts
for line in open("/proc/meminfo").readlines():
data = line.split(":", 1)
key = data[0]
if key in MEMORY_FACTS:
val = data[1].strip().split(' ')[0]
facts["%s_mb" % key.lower()] = long(val) / 1024
def get_cpu_facts(facts):
i = 0
physid = 0
sockets = {}
if not os.access("/proc/cpuinfo", os.R_OK):
return facts
for line in open("/proc/cpuinfo").readlines():
data = line.split(":", 1)
key = data[0].strip()
if key == 'model name':
if 'processor' not in facts:
facts['processor'] = []
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:
facts['processor_count'] = len(sockets)
facts['processor_cores'] = reduce(lambda x, y: x + y, sockets.values())
else:
facts['processor_count'] = i
facts['processor_cores'] = 'NA'
def get_hardware_facts(facts):
get_memory_facts(facts)
get_cpu_facts(facts)
for (key,path) in DMI_DICT.items():
data = get_file_content(path)
if data is not None:
if key == 'form_factor':
facts['form_factor'] = FORM_FACTOR[int(data)]
else:
facts[key] = data
else:
facts[key] = 'NA'
def get_linux_virtual_facts(facts):
if os.path.exists("/proc/xen"):
facts['virtualization_type'] = 'xen'
facts['virtualization_role'] = 'guest'
if os.path.exists("/proc/xen/capabilities"):
facts['virtualization_role'] = 'host'
if 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:
facts['virtualization_type'] = 'kvm'
facts['virtualization_role'] = 'host'
elif 'vboxdrv' in modules:
facts['virtualization_type'] = 'virtualbox'
facts['virtualization_role'] = 'host'
elif 'vboxguest' in modules:
facts['virtualization_type'] = 'virtualbox'
facts['virtualization_role'] = 'guest'
if 'QEMU' in facts['processor'][0]:
facts['virtualization_type'] = 'kvm'
facts['virtualization_role'] = 'guest'
if facts['distribution'] == 'VMwareESX':
facts['virtualization_type'] = 'VMware'
facts['virtualization_role'] = 'host'
# You can spawn a dmidecode process and parse that or infer from devices
for dev_model in glob.glob('/proc/ide/hd*/model'):
info = open(dev_model).read()
if 'VMware' in info:
facts['virtualization_type'] = 'VMware'
facts['virtualization_role'] = 'guest'
elif 'Virtual HD' in info or 'Virtual CD' in info:
facts['virtualization_type'] = 'VirtualPC'
facts['virtualization_role'] = 'guest'
def get_virtual_facts(facts):
facts['virtualization_type'] = 'None'
facts['virtualization_role'] = 'None'
if facts['system'] == 'Linux':
facts = get_linux_virtual_facts(facts)
# get list of interfaces that are up
def get_interfaces():
length = 4096
offset = 32
step = 32
if platform.architecture()[0] == '64bit':
offset = 16
step = 40
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
names = array.array('B', '\0' * length)
bytelen = struct.unpack('iL', fcntl.ioctl(
s.fileno(), SIOCGIFCONF, struct.pack(
'iL', length, names.buffer_info()[0])
))[0]
return [names.tostring()[i:i+offset].split('\0', 1)[0]
for i in range(0, bytelen, step)]
def get_iface_hwaddr(iface):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
info = fcntl.ioctl(s.fileno(), SIOCGIFHWADDR,
struct.pack('256s', iface[:15]))
return ''.join(['%02x:' % ord(char) for char in info[18:24]])[:-1]
def get_network_facts(facts):
facts['fqdn'] = socket.gethostname()
facts['hostname'] = facts['fqdn'].split('.')[0]
facts['interfaces'] = get_interfaces()
for iface in facts['interfaces']:
facts[iface] = { 'macaddress': get_iface_hwaddr(iface) }
# This is lame, but there doesn't appear to be a good way
# to get all addresses for both IPv4 and IPv6.
cmd = subprocess.Popen("/sbin/ifconfig %s" % iface, shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
for line in out.split('\n'):
data = line.split()
if 'inet addr' in line:
if 'ipv4' not in facts[iface]:
facts[iface]['ipv4'] = {}
facts[iface]['ipv4'] = { 'address': data[1].split(':')[1],
'netmask': data[-1].split(':')[1] }
if 'inet6 addr' in line:
(ip, prefix) = data[2].split('/')
scope = data[3].split(':')[1].lower()
if 'ipv6' not in facts[iface]:
facts[iface]['ipv6'] = []
facts[iface]['ipv6'].append( { 'address': ip,
'prefix': prefix,
'scope': scope } )
return facts
def get_public_ssh_host_keys(facts):
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:
facts['ssh_host_key_dsa_public'] = dsa.split()[1]
if rsa is None:
rsa = 'NA'
else:
facts['ssh_host_key_rsa_public'] = rsa.split()[1]
def get_service_facts(facts):
get_public_ssh_host_keys(facts)
def ansible_facts():
facts = {}
get_platform_facts(facts)
get_hardware_facts(facts)
get_virtual_facts(facts)
get_network_facts(facts)
get_service_facts(facts)
return facts
# load config & template variables
if len(sys.argv) == 1:
sys.exit(1)
argfile = sys.argv[1]
if not os.path.exists(argfile):
sys.exit(1)
setup_options = open(argfile).read().strip()
try:
setup_options = json.loads(setup_options)
except:
list_options = shlex.split(setup_options)
setup_options = {}
for opt in list_options:
(k,v) = opt.split("=")
setup_options[k]=v
ansible_file = setup_options.get('metadata', DEFAULT_ANSIBLE_SETUP)
ansible_dir = os.path.dirname(ansible_file)
# create the config dir if it doesn't exist
if not os.path.exists(ansible_dir):
os.makedirs(ansible_dir)
changed = False
md5sum = None
if not os.path.exists(ansible_file):
changed = True
else:
md5sum = os.popen("md5sum %s" % ansible_file).read().split()[0]
# Get some basic facts in case facter or ohai are not installed
for (k, v) in ansible_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
# write the template/settings file using
# instructions from server
f = open(ansible_file, "w+")
reformat = json.dumps(setup_options, sort_keys=True, indent=4)
f.write(reformat)
f.close()
md5sum2 = os.popen("md5sum %s" % ansible_file).read().split()[0]
if md5sum != md5sum2:
changed = True
setup_options['written'] = ansible_file
setup_options['changed'] = changed
setup_options['md5sum'] = md5sum2
print json.dumps(setup_options)
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