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Add attribute support for confluent2hosts

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Implement something akin to makehosts
from xCAT.
This commit is contained in:
Jarrod Johnson 2021-11-04 14:44:06 -04:00
parent e749f8f8d5
commit df7d34dc28
1 changed files with 66 additions and 14 deletions
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80
confluent_client/bin/confluent2hosts
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@ -1,6 +1,7 @@
#!/usr/bin/python2
import argparse
import os
import re
import signal
import sys
try:
@ -114,6 +115,7 @@ class HostMerger(object):
def main():
ap = argparse.ArgumentParser(description="Create/amend /etc/hosts file for given noderange")
ap.add_argument('noderange', help='Noderange to generate/update /etc/hosts for')
ap.add_argument('-a', '--attrib', help='Pull ip addresses and hostnames from attribute database', action='store_true')
ap.add_argument('-i', '--ip', help='Expression to generate addresses (e.g. 172.16.1.{n1} or fd2b:246f:8a50::{n1:x})')
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')
args = ap.parse_args()
@ -122,21 +124,71 @@ def main():
names = ' '.join(args.name)
else:
names = '{node} {node}.{dns.domain}'
if not args.ip:
sys.stderr.write('-i is currently required\n')
sys.exit(1)
namesbynode = {}
ipbynode = {}
expurl = '/noderange/{0}/attributes/expression'.format(args.noderange)
expression = names
exitcode = 0
exitcode |= expand_expression(c, namesbynode, expurl, names)
exitcode |= expand_expression(c, ipbynode, expurl, args.ip)
if exitcode:
sys.exit(exitcode)
merger = HostMerger()
for node in ipbynode:
merger.add_entry(ipbynode[node], namesbynode[node])
if not args.ip and not args.attrib:
sys.stderr.write('-a or -i is currently required\n')
sys.exit(1)
if args.attrib:
ip4bynode = {}
ip6bynode = {}
namesbynode = {}
domainsbynode = {}
for ent in c.read('/noderange/{0}/attributes/current'.format(args.noderange)):
ent = ent.get('databynode', {})
for node in ent:
for attrib in ent[node]:
val = ent[node][attrib]
if not isinstance(val, dict):
continue
val = val.get('value', None)
if attrib == 'dns.domain':
domainsbynode[node] = val
if attrib.startswith('net.'):
nameparts = attrib.split('.')
if len(nameparts) == 2:
currnet = None
else:
currnet = '.'.join(nameparts[1:-1])
for currdict in (ip4bynode, ip6bynode, namesbynode):
if node not in currdict:
currdict[node] = {}
if attrib.endswith('.ipv4_address') and val:
ip4bynode[node][currnet] = val.split('/', 1)[0]
elif attrib.endswith('.ipv6_address') and val:
ip6bynode[node][currnet] = val.split('/', 1)[0]
elif attrib.endswith('.hostname'):
namesbynode[node][currnet] = re.split('\s+|,', val)
for node in ip4bynode:
mydomain = domainsbynode.get(node, None)
for ipdb in (ip4bynode, ip6bynode):
for currnet in ipdb[node]:
if args.name:
sys.stderr.write('Custom name and attribute addresses not currently supported together\n')
sys.exit(1)
else:
names = list(namesbynode.get(node, {}).get(currnet, [node]))
if mydomain:
for name in names:
if mydomain in names:
break
else:
for name in list(names):
names.append('{0}.{1}'.format(name, mydomain))
names = ' '.join(names)
merger.add_entry(ipdb[node][currnet], names)
merger.write_out('/etc/whatnowhosts')
else:
namesbynode = {}
ipbynode = {}
expurl = '/noderange/{0}/attributes/expression'.format(args.noderange)
expression = names
exitcode = 0
exitcode |= expand_expression(c, namesbynode, expurl, names)
exitcode |= expand_expression(c, ipbynode, expurl, args.ip)
if exitcode:
sys.exit(exitcode)
for node in ipbynode:
merger.add_entry(ipbynode[node], namesbynode[node])
if os.path.exists('/etc/hosts'):
merger.read_target('/etc/hosts')
os.rename('/etc/hosts', '/etc/hosts.confluentbkup')