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https://github.com/CumulusNetworks/ifupdown2.git
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883f7f83f2
Ticket: CM-2643 Reviewed By: Testing Done: Tested build/install This also pulls in python-gvgen package from wheezy sid into our upstream dir. Previously i had packaged the gvgen module directly into the ifupdown package
151 lines
4.7 KiB
Python
Executable File
151 lines
4.7 KiB
Python
Executable File
#!/usr/bin/python
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import argparse
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import sys
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import subprocess
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""" This script prints to stdout /etc/network/interfaces entries for
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requested interfaces.
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Currently it supports generation of interfaces(5) section for all
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swp interfaces on the system. And also an interface section
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for a bridge with all swp ports.
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Example use of this script:
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generate the swp_defaults file:
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(bkup existing /etc/network/interfaces.d/swp_defaults file if one exists)
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#generate_interfaces.py -s > /etc/network/interfaces.d/swp_defaults
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User -m option if you want the new swp_defaults to be auto merged
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with the contents from the old file, use -m option
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#generate_interfaces.py -s -m /etc/network/interfaces.d/swp_defaults > /etc/network/interfaces.d/swp_defaults.new
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Include the swp_defaults file in /etc/network/interfaces file
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(if not already there) using the source command as shown below:
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source /etc/network/interfaces.d/swp_defaults
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"""
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def get_swp_interfaces():
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porttab_path = '/var/lib/cumulus/porttab'
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ports = []
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ptfile = open(porttab_path, 'r')
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for line in ptfile.readlines():
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line = line.strip()
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if '#' in line:
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continue
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try:
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ports.append(line.split()[0])
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except ValueError:
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continue
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return ports
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def print_swp_defaults_header():
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print '''
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# ** This file is autogenerated by /usr/share/doc/python-ifupdown2/generate_interfaces.py **
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#
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# This is /etc/network/interfaces section for all available swp
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# ports on the system.
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#
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# To include this file in the main /etc/network/interfaces file,
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# copy this file under /etc/network/interfaces.d/ and use the
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# source line in the /etc/network/interfaces file.
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#
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# example entry in /etc/network/interfaces:
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# source /etc/network/interfaces.d/<filename>
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#
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# See manpage interfaces(5) for details.
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'''
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def print_bridge_untagged_defaults_header():
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print '''
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# ** This file is autogenerated by /usr/share/doc/python-ifupdown2/generate_interfaces.py **
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#
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# This is /etc/network/interfaces section for a bridge device with all swp
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# ports in the system.
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#
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# To include this file in the main /etc/network/interfaces file,
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# copy this file under /etc/network/interfaces.d/ and use the
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# source line in the /etc/network/interfaces file as shown below.
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# details.
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#
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# example entry in /etc/network/interfaces:
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# source /etc/network/interfaces.d/filename
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#
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# See manpage interfaces(5) for details
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'''
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def interfaces_print_swp_default(swp_intf):
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outbuf = None
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if args.mergefile:
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try:
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cmd = ['/sbin/ifquery', '%s' %swp_intf, '-i', '%s' %args.mergefile]
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outbuf = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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except Exception, e:
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# no interface found gen latest
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pass
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if not outbuf:
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outbuf = 'auto %s\niface %s\n\n' %(swp_intf, swp_intf)
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return outbuf
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def interfaces_print_swp_defaults(swp_intfs):
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print_swp_defaults_header()
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outbuf = ''
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for i in swp_intfs:
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outbuf += interfaces_print_swp_default(i)
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print outbuf
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def interfaces_print_bridge_default(swp_intfs):
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print_bridge_untagged_defaults_header()
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outbuf = 'auto bridge-untagged\n'
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outbuf += 'iface bridge-untagged\n'
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outbuf += ' bridge-ports \\\n'
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linen = 5
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ports = ''
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for i in range(0, len(swp_intfs), linen):
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if ports:
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ports += ' \\\n'
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ports += ' %s' %(' '.join(swp_intfs[i:i+linen]))
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outbuf += ports
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print outbuf
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def populate_argparser(argparser):
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group = argparser.add_mutually_exclusive_group(required=False)
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group.add_argument('-s', '--swp-defaults', action='store_true',
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dest='swpdefaults', help='generate swp defaults file')
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group.add_argument('-b', '--bridge-default', action='store_true',
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dest='bridgedefault',
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help='generate default untagged bridge')
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argparser.add_argument('-m', '--merge', dest='mergefile', help='merge ' +
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'new generated iface content with the old one')
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argparser = argparse.ArgumentParser(description='ifupdown interfaces file gen helper')
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populate_argparser(argparser)
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args = argparser.parse_args(sys.argv[1:])
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if not args.swpdefaults and not args.bridgedefault:
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argparser.print_help()
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exit(1)
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if args.bridgedefault and args.mergefile:
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print 'error: mergefile option currently only supported with -s'
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argparser.print_help()
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exit(1)
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swp_intfs = get_swp_interfaces()
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if not swp_intfs:
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print 'error: no ports found'
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exit(1)
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if args.swpdefaults:
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interfaces_print_swp_defaults(swp_intfs)
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elif args.bridgedefault:
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interfaces_print_bridge_default(swp_intfs)
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else:
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argparser.print_help()
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