mirror of
https://github.com/xcat2/confluent.git
synced 2024-11-22 09:32:21 +00:00
213 lines
8.1 KiB
Python
213 lines
8.1 KiB
Python
#!/usr/bin/python2
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import argparse
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import os
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import re
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import signal
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import sys
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try:
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signal.signal(signal.SIGPIPE, signal.SIG_DFL)
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except AttributeError:
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pass
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path = os.path.dirname(os.path.realpath(__file__))
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path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
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if path.startswith('/opt'):
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sys.path.append(path)
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import confluent.client as client
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import confluent.sortutil as sortutil
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def partitionhostsline(line):
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comment = ''
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if '#' in line:
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cmdidx = line.index('#')
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comment = line[cmdidx:]
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line = line[:cmdidx].strip()
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if not line.strip():
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return '', [], comment
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ipaddr, names = line.split(None, 1)
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names = names.split()
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return ipaddr, names, comment
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class HostMerger(object):
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def __init__(self):
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self.byip = {}
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self.byname = {}
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self.byname6 = {}
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self.sourcelines = []
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self.targlines = []
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def read_source(self, sourcefile):
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with open(sourcefile, 'r') as hfile:
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self.sourcelines = hfile.read().split('\n')
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while not self.sourcelines[-1]:
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self.sourcelines = self.sourcelines[:-1]
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for x in range(len(self.sourcelines)):
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line = self.sourcelines[x]
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currip, names, comment = partitionhostsline(line)
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if currip:
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self.byip[currip] = x
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byname = self.byname
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if ':' in currip:
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byname = self.byname6
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for name in names:
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byname[name] = x
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def add_entry(self, ip, names):
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targ = self.byname
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if ':' in ip:
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targ = self.byname6
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line = '{:<39} {}'.format(ip, names)
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x = len(self.sourcelines)
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self.sourcelines.append(line)
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for name in names.split():
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if not name:
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continue
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targ[name] = x
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self.byip[ip] = x
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def read_target(self, targetfile):
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if not os.path.exists(targetfile):
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return
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with open(targetfile, 'r') as hfile:
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lines = hfile.read().split('\n')
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while lines and not lines[-1]:
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lines = lines[:-1]
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for y in range(len(lines)):
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line = lines[y]
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currip, names, comment = partitionhostsline(line)
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byname = self.byname
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if ':' in currip:
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byname = self.byname6
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if currip in self.byip:
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x = self.byip[currip]
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if self.sourcelines[x] is None:
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# have already consumed this entry
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continue
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self.targlines.append(self.sourcelines[x])
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self.sourcelines[x] = None
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continue
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for name in names:
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if name in byname:
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x = byname[name]
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if self.sourcelines[x] is None:
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break
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self.targlines.append(self.sourcelines[x])
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self.sourcelines[x] = None
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break
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else:
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self.targlines.append(line)
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def write_out(self, targetfile):
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while self.targlines and not self.targlines[-1]:
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self.targlines = self.targlines[:-1]
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while self.sourcelines and not self.sourcelines[-1]:
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self.sourcelines = self.sourcelines[:-1]
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if not self.sourcelines:
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break
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with open(targetfile, 'w') as hosts:
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for line in self.targlines:
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hosts.write(line + '\n')
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for line in self.sourcelines:
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if line is not None:
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hosts.write(line + '\n')
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def main():
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ap = argparse.ArgumentParser(description="Create/amend /etc/hosts file for given noderange")
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ap.add_argument('noderange', help='Noderange to generate/update /etc/hosts for')
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ap.add_argument('-a', '--attrib', help='Pull ip addresses and hostnames from attribute database', action='store_true')
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ap.add_argument('-i', '--ip', help='Expression to generate addresses (e.g. 172.16.1.{n1} or fd2b:246f:8a50::{n1:x})')
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ap.add_argument('-n', '--name', help='Expression for name to add ({node}-compute, etc). If unspecified, "{node} {node}.{dns.domain}" will be used', action='append')
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args = ap.parse_args()
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c = client.Command()
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if args.name:
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names = ' '.join(args.name)
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else:
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names = '{node} {node}.{dns.domain}'
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merger = HostMerger()
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if not args.ip and not args.attrib:
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sys.stderr.write('-a or -i is currently required\n')
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sys.exit(1)
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if args.attrib:
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ip4bynode = {}
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ip6bynode = {}
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namesbynode = {}
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domainsbynode = {}
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for ent in c.read('/noderange/{0}/attributes/current'.format(args.noderange)):
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ent = ent.get('databynode', {})
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for node in ent:
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for attrib in ent[node]:
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val = ent[node][attrib]
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if not isinstance(val, dict):
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continue
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val = val.get('value', None)
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if attrib == 'dns.domain':
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domainsbynode[node] = val
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if attrib.startswith('net.'):
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nameparts = attrib.split('.')
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if len(nameparts) == 2:
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currnet = None
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else:
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currnet = '.'.join(nameparts[1:-1])
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for currdict in (ip4bynode, ip6bynode, namesbynode):
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if node not in currdict:
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currdict[node] = {}
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if attrib.endswith('.ipv4_address') and val:
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ip4bynode[node][currnet] = val.split('/', 1)[0]
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elif attrib.endswith('.ipv6_address') and val:
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ip6bynode[node][currnet] = val.split('/', 1)[0]
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elif attrib.endswith('.hostname'):
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namesbynode[node][currnet] = re.split('\s+|,', val)
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for node in ip4bynode:
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mydomain = domainsbynode.get(node, None)
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for ipdb in (ip4bynode, ip6bynode):
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for currnet in ipdb[node]:
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if args.name:
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sys.stderr.write('Custom name and attribute addresses not currently supported together\n')
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sys.exit(1)
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else:
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names = list(namesbynode.get(node, {}).get(currnet, [node]))
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if mydomain:
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for name in names:
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if mydomain in names:
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break
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else:
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for name in list(names):
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names.append('{0}.{1}'.format(name, mydomain))
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names = ' '.join(names)
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merger.add_entry(ipdb[node][currnet], names)
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merger.write_out('/etc/whatnowhosts')
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else:
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namesbynode = {}
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ipbynode = {}
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expurl = '/noderange/{0}/attributes/expression'.format(args.noderange)
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expression = names
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exitcode = 0
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exitcode |= expand_expression(c, namesbynode, expurl, names)
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exitcode |= expand_expression(c, ipbynode, expurl, args.ip)
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if exitcode:
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sys.exit(exitcode)
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for node in ipbynode:
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merger.add_entry(ipbynode[node], namesbynode[node])
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if os.path.exists('/etc/hosts'):
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merger.read_target('/etc/hosts')
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os.rename('/etc/hosts', '/etc/hosts.confluentbkup')
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merger.write_out('/etc/hosts')
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def expand_expression(c, namesbynode, expurl, expression):
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exitcode = 0
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for exp in c.create(expurl, {'expression': expression}):
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if 'error' in exp:
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sys.stderr.write(exp['error'] + '\n')
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exitcode |= exp.get('errorcode', 1)
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ex = exp.get('databynode', ())
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for node in ex:
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namesbynode[node] = ex[node]['value']
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return exitcode
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if __name__ == '__main__':
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main()
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