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# Copyright (C) 2009-2010 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # # Author: Scott Moser <scott.moser@canonical.com> # Author: Juerg Haefliger <juerg.haefliger@hp.com> # # This file is part of cloud-init. See LICENSE file for license information. """Disable EC2 Metadata: Disable AWS EC2 metadata.""" import logging from cloudinit import subp, util from cloudinit.cloud import Cloud from cloudinit.config import Config from cloudinit.config.schema import MetaSchema from cloudinit.distros import ALL_DISTROS from cloudinit.settings import PER_ALWAYS REJECT_CMD_IF = ["route", "add", "-host", "169.254.169.254", "reject"] REJECT_CMD_IP = ["ip", "route", "add", "prohibit", "169.254.169.254"] LOG = logging.getLogger(__name__) meta: MetaSchema = { "id": "cc_disable_ec2_metadata", "distros": [ALL_DISTROS], "frequency": PER_ALWAYS, "activate_by_schema_keys": ["disable_ec2_metadata"], } def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None: disabled = util.get_cfg_option_bool(cfg, "disable_ec2_metadata", False) if disabled: reject_cmd = None if subp.which("ip"): reject_cmd = REJECT_CMD_IP elif subp.which("ifconfig"): reject_cmd = REJECT_CMD_IF else: LOG.error( 'Neither "route" nor "ip" command found, unable to ' "manipulate routing table" ) return subp.subp(reject_cmd, capture=False) else: LOG.debug( "Skipping module named %s, disabling the ec2 route not enabled", name, )
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