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# 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""",
}
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.warn(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
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