summaryrefslogtreecommitdiff
path: root/cloudinit/warnings.py
blob: f9f7a63cc1f20be81141040c905c09a46b858ce6 (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
# This file is part of cloud-init. See LICENSE file for license information.

from cloudinit import helpers
from cloudinit import log as logging
from cloudinit import util

import os
import time

LOG = logging.getLogger()

WARNINGS = {
    'non_ec2_md': """
This system is using the EC2 Metadata Service, but does not appear to
be running on Amazon EC2 or one of cloud-init's known platforms that
provide a EC2 Metadata service. In the future, cloud-init may stop
reading metadata from the EC2 Metadata Service unless the platform can
be identified.

If you are seeing this message, please file a bug against
cloud-init at
   https://bugs.launchpad.net/cloud-init/+filebug?field.tags=dsid
Make sure to include the cloud provider your instance is
running on.

For more information see
  https://bugs.launchpad.net/bugs/1660385

After you have filed a bug, you can disable this warning by
launching your instance with the cloud-config below, or
putting that content into
   /etc/cloud/cloud.cfg.d/99-ec2-datasource.cfg

#cloud-config
datasource:
 Ec2:
  strict_id: false""",
    'dsid_missing_source': """
A new feature in cloud-init identified possible datasources for
this system as:
  {dslist}
However, the datasource used was: {source}

In the future, cloud-init will only attempt to use datasources that
are identified or specifically configured.
For more information see
  https://bugs.launchpad.net/bugs/1669675

If you are seeing this message, please file a bug against
cloud-init at
   https://bugs.launchpad.net/cloud-init/+filebug?field.tags=dsid
Make sure to include the cloud provider your instance is
running on.

After you have filed a bug, you can disable this warning by launching
your instance with the cloud-config below, or putting that content
into /etc/cloud/cloud.cfg.d/99-warnings.cfg

#cloud-config
warnings:
  dsid_missing_source: off""",
}


def _get_warn_dir(cfg):
    paths = helpers.Paths(
        path_cfgs=cfg.get('system_info', {}).get('paths', {}))
    return paths.get_ipath_cur('warnings')


def _load_warn_cfg(cfg, name, mode=True, sleep=None):
    # parse cfg['warnings']['name'] returning boolean, sleep
    # expected value is form of:
    #   (on|off|true|false|sleep)[,sleeptime]
    # boolean True == on, False == off
    default = (mode, sleep)
    if not cfg or not isinstance(cfg, dict):
        return default

    ncfg = util.get_cfg_by_path(cfg, ('warnings', name))
    if ncfg is None:
        return default

    if ncfg in ("on", "true", True):
        return True, None

    if ncfg in ("off", "false", False):
        return False, None

    mode, _, csleep = ncfg.partition(",")
    if mode != "sleep":
        return default

    if csleep:
        try:
            sleep = int(csleep)
        except ValueError:
            return default

    return True, sleep


def show_warning(name, cfg=None, sleep=None, mode=True, **kwargs):
    # kwargs are used for .format of the message.
    # sleep and mode are default values used if
    #   cfg['warnings']['name'] is not present.
    if cfg is None:
        cfg = {}

    mode, sleep = _load_warn_cfg(cfg, name, mode=mode, sleep=sleep)
    if not mode:
        return

    msg = WARNINGS[name].format(**kwargs)
    msgwidth = 70
    linewidth = msgwidth + 4

    fmt = "# %%-%ds #" % msgwidth
    topline = "*" * linewidth + "\n"
    fmtlines = []
    for line in msg.strip("\n").splitlines():
        fmtlines.append(fmt % line)

    closeline = topline
    if sleep:
        sleepmsg = "  [sleeping for %d seconds]  " % sleep
        closeline = sleepmsg.center(linewidth, "*") + "\n"

    util.write_file(
        os.path.join(_get_warn_dir(cfg), name),
        topline + "\n".join(fmtlines) + "\n" + topline)

    LOG.warning(topline + "\n".join(fmtlines) + "\n" + closeline)

    if sleep:
        LOG.debug("sleeping %d seconds for warning '%s'", sleep, name)
        time.sleep(sleep)

# vi: ts=4 expandtab