summaryrefslogtreecommitdiff
path: root/cloudinit/distros/rhel_util.py
blob: 504b5d2c196c525e41f70757732b6c1a465d3783 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
# vi: ts=4 expandtab
#
#    Copyright (C) 2012 Canonical Ltd.
#    Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
#    Copyright (C) 2012 Yahoo! Inc.
#    Copyright (C) 2013 SUSE LLC
#
#    Author: Scott Moser <scott.moser@canonical.com>
#    Author: Juerg Haefliger <juerg.haefliger@hp.com>
#    Author: Joshua Harlow <harlowja@yahoo-inc.com>
#    Author: Robert Schweikert <rjschwei@suse.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 3, as
#    published by the Free Software Foundation.
#
#    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#

from cloudinit.distros.parsers.resolv_conf import ResolvConf
from cloudinit.distros.parsers.sys_conf import SysConf

from cloudinit import log as logging
from cloudinit import util

LOG = logging.getLogger(__name__)


# This is a util function to translate Debian based distro interface blobs as
# given in /etc/network/interfaces to an equivalent format for distributions
# that use ifcfg-* style (Red Hat and SUSE).
# TODO(harlowja) remove when we have python-netcf active...
def translate_network(settings):
    # Get the standard cmd, args from the ubuntu format
    entries = []
    for line in settings.splitlines():
        line = line.strip()
        if not line or line.startswith("#"):
            continue
        split_up = line.split(None, 1)
        if len(split_up) <= 1:
            continue
        entries.append(split_up)
    # Figure out where each iface section is
    ifaces = []
    consume = {}
    for (cmd, args) in entries:
        if cmd == 'iface':
            if consume:
                ifaces.append(consume)
                consume = {}
            consume[cmd] = args
        else:
            consume[cmd] = args
    # Check if anything left over to consume
    absorb = False
    for (cmd, args) in consume.iteritems():
        if cmd == 'iface':
            absorb = True
    if absorb:
        ifaces.append(consume)
    # Now translate
    real_ifaces = {}
    for info in ifaces:
        if 'iface' not in info:
            continue
        iface_details = info['iface'].split(None)
        dev_name = None
        if len(iface_details) >= 1:
            dev = iface_details[0].strip().lower()
            if dev:
                dev_name = dev
        if not dev_name:
            continue
        iface_info = {}
        if len(iface_details) >= 3:
            proto_type = iface_details[2].strip().lower()
            # Seems like this can be 'loopback' which we don't
            # really care about
            if proto_type in ['dhcp', 'static']:
                iface_info['bootproto'] = proto_type
        # These can just be copied over
        for k in ['netmask', 'address', 'gateway', 'broadcast']:
            if k in info:
                val = info[k].strip().lower()
                if val:
                    iface_info[k] = val
        # Name server info provided??
        if 'dns-nameservers' in info:
            iface_info['dns-nameservers'] = info['dns-nameservers'].split()
        # Name server search info provided??
        if 'dns-search' in info:
            iface_info['dns-search'] = info['dns-search'].split()
        # Is any mac address spoofing going on??
        if 'hwaddress' in info:
            hw_info = info['hwaddress'].lower().strip()
            hw_split = hw_info.split(None, 1)
            if len(hw_split) == 2 and hw_split[0].startswith('ether'):
                hw_addr = hw_split[1]
                if hw_addr:
                    iface_info['hwaddress'] = hw_addr
        real_ifaces[dev_name] = iface_info
    # Check for those that should be started on boot via 'auto'
    for (cmd, args) in entries:
        if cmd == 'auto':
            # Seems like auto can be like 'auto eth0 eth0:1' so just get the
            # first part out as the device name
            args = args.split(None)
            if not args:
                continue
            dev_name = args[0].strip().lower()
            if dev_name in real_ifaces:
                real_ifaces[dev_name]['auto'] = True
    return real_ifaces


# Helper function to update a RHEL/SUSE /etc/sysconfig/* file
def update_sysconfig_file(fn, adjustments, allow_empty=False):
    if not adjustments:
        return
    (exists, contents) = read_sysconfig_file(fn)
    updated_am = 0
    for (k, v) in adjustments.items():
        if v is None:
            continue
        v = str(v)
        if len(v) == 0 and not allow_empty:
            continue
        contents[k] = v
        updated_am += 1
    if updated_am:
        lines = [
            str(contents),
        ]
        if not exists:
            lines.insert(0, util.make_header())
        util.write_file(fn, "\n".join(lines) + "\n", 0644)


# Helper function to read a RHEL/SUSE /etc/sysconfig/* file
def read_sysconfig_file(fn):
    exists = False
    try:
        contents = util.load_file(fn).splitlines()
        exists = True
    except IOError:
        contents = []
    return (exists, SysConf(contents))


# Helper function to update RHEL/SUSE /etc/resolv.conf
def update_resolve_conf_file(fn, dns_servers, search_servers):
    try:
        r_conf = ResolvConf(util.load_file(fn))
        r_conf.parse()
    except IOError:
        util.logexc(LOG, "Failed at parsing %s reverting to an empty "
                    "instance", fn)
        r_conf = ResolvConf('')
        r_conf.parse()
    if dns_servers:
        for s in dns_servers:
            try:
                r_conf.add_nameserver(s)
            except ValueError:
                util.logexc(LOG, "Failed at adding nameserver %s", s)
    if search_servers:
        for s in search_servers:
            try:
                r_conf.add_search_domain(s)
            except ValueError:
                util.logexc(LOG, "Failed at adding search domain %s", s)
    util.write_file(fn, str(r_conf), 0644)