author | Tero Marttila <terom@paivola.fi> |
Tue, 17 Dec 2013 17:31:41 +0200 | |
changeset 306 | a1bdb4499c7a |
parent 305 | e85c95e757eb |
child 307 | cc645622024e |
permissions | -rw-r--r-- |
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""" |
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Host definitions. |
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""" |
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import pvl.args |
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import pvl.dns.zone |
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import configobj |
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import ipaddr |
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import optparse |
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import os.path |
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def optparser (parser) : |
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hosts = optparse.OptionGroup(parser, "Hosts input") |
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hosts.add_option('--hosts-charset', metavar='CHARSET', default='utf-8', |
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help="Encoding used for host files") |
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hosts.add_option('--hosts-domain', metavar='DOMAIN', |
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help="Default domain for hosts") |
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return hosts |
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class Host (object) : |
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@classmethod |
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def expand (cls, options, host, range, ip, **opts) : |
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host = pvl.dns.zone.parse_generate_field(host) |
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ip = pvl.dns.zone.parse_generate_field(ip) |
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for i in range : |
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yield cls.build(options, host(i), |
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ip = ip(i), |
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**opts |
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) |
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@classmethod |
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def config (cls, options, host, ip=None, **extra) : |
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""" |
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Yield Hosts from a config section's scalars. |
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""" |
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if '{' in host : |
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pre, host = host.split('{', 1) |
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range, post = host.rsplit('}', 1) |
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range = pvl.dns.zone.parse_generate_range(range) |
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host = pre + "$" + post |
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for host in cls.expand(options, host, range, ip, **extra) : |
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yield host |
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else : |
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yield cls.build(options, host, ip=ip, **extra) |
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@classmethod |
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def build (cls, options, host, domain=None, ip=None, ip6=None, owner=None, boot=None, alias=None, **extra) : |
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""" |
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Return a Host from a config section's scalars. |
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""" |
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if alias : |
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alias = alias.split() |
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else : |
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alias = () |
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ethernet = { } |
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for field, value in extra.iteritems() : |
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if '.' in field : |
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field, instance = field.split('.') |
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else : |
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instance = None |
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if field == 'ethernet' : |
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if instance : |
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ethernet[instance] = value |
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else : |
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for eth in value.split() : |
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ethernet[len(ethernet)] = eth |
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else : |
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raise ValueError("%s: Unknown host field: %s=%s" % (host, field, value)) |
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if domain is None : |
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domain = options.hosts_domain |
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return cls(host, |
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domain = domain, |
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ip = ipaddr.IPv4Address(ip) if ip else None, |
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ip6 = ipaddr.IPv6Address(ip6) if ip6 else None, |
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ethernet = ethernet, |
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alias = alias, |
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owner = owner, |
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boot = boot, |
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) |
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def __init__ (self, host, domain=None, ip=None, ip6=None, ethernet={ }, alias=(), owner=None, boot=None) : |
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""" |
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host - str |
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domain - str |
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ip - ipaddr.IPv4Address |
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ip6 - ipaddr.IPv6Address |
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ethernet - { index: ethernet } |
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alias - list |
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owner - str: LDAP uid |
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""" |
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self.host = host |
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self.domain = domain |
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self.ip = ip |
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self.ip6 = ip6 |
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self.ethernet = ethernet |
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self.alias = alias |
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self.owner = owner |
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self.boot = boot |
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def fqdn (self) : |
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if '.' in self.host : |
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return self.host + '.' |
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elif self.domain : |
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return pvl.dns.zone.fqdn(self.host, self.domain) |
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else : |
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raise ValueError("%s: have no fqdn/domain" % (self, )) |
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120 |
|
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def __str__ (self) : |
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return str(self.host) |
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123 |
|
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def apply_hosts_config (options, config, name, defaults={}) : |
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125 |
""" |
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Load hosts from a ConfigObj section. |
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127 |
""" |
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128 |
|
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129 |
scalars = dict((scalar, config[scalar]) for scalar in config.scalars) |
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130 |
|
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131 |
if config.sections : |
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# recurse; this is a domain meta-section |
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params = dict(defaults, domain=name, **scalars) |
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134 |
|
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135 |
for section in config.sections : |
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136 |
for host in apply_hosts_config(options, config[section], section, params) : |
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137 |
yield host |
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138 |
|
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139 |
elif name : |
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params = dict(defaults, **scalars) |
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141 |
|
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142 |
# this is a host section |
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143 |
for host in Host.config(options, name, **params) : |
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144 |
yield host |
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145 |
|
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146 |
else : |
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147 |
raise ValueError("No sections in config") |
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|
148 |
|
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149 |
|
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150 |
def apply_hosts_file (options, file) : |
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|
151 |
""" |
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152 |
Load Hosts from a file. |
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|
153 |
|
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154 |
""" |
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155 |
|
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156 |
config = configobj.ConfigObj(file, |
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157 |
encoding = options.hosts_charset, |
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|
158 |
) |
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|
159 |
|
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|
160 |
# use file basename as default |
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161 |
name = os.path.basename(file.name) |
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|
162 |
|
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163 |
return apply_hosts_config(options, config, name) |
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|
164 |
|
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|
165 |
def apply_hosts (options, files) : |
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|
166 |
""" |
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|
167 |
Load Hosts from files. |
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|
168 |
""" |
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|
169 |
|
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170 |
for file in files : |
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171 |
for host in apply_hosts_file(options, file) : |
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172 |
yield host |
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|
173 |
|
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|
174 |
def sort_hosts (options, hosts) : |
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|
175 |
""" |
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|
176 |
Yields hosts with a sorting key. |
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|
177 |
""" |
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|
178 |
|
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|
179 |
for host in hosts : |
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|
180 |
if host.ip : |
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181 |
sort = host.ip |
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|
182 |
else : |
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|
183 |
# sorts first |
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|
184 |
sort = ipaddr.IPAddress(0) |
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|
185 |
|
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186 |
yield sort, host |
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|
187 |
|
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|
188 |
def apply (options, args) : |
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|
189 |
""" |
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|
190 |
Load Hosts from arguments. |
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|
191 |
""" |
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|
192 |
|
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|
193 |
# without unicode |
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|
194 |
files = pvl.args.apply_files(args, 'r') |
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|
195 |
|
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|
196 |
# load configs |
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197 |
hosts = apply_hosts(options, files) |
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|
198 |
|
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|
199 |
# sort |
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|
200 |
hosts = list(sort_hosts(options, hosts)) |
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|
201 |
hosts.sort() |
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|
202 |
hosts = [host for sort, host in hosts] |
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|
203 |
|
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|
204 |
return hosts |