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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.
"""Runcmd: run arbitrary commands at rc.local with output to the console"""
import os
from textwrap import dedent
from cloudinit import util
from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
from cloudinit.distros import ALL_DISTROS
from cloudinit.settings import PER_INSTANCE
# The schema definition for each cloud-config module is a strict contract for
# describing supported configuration parameters for each cloud-config section.
# It allows cloud-config to validate and alert users to invalid or ignored
# configuration options before actually attempting to deploy with said
# configuration.
distros = [ALL_DISTROS]
meta = {
"id": "cc_runcmd",
"name": "Runcmd",
"title": "Run arbitrary commands",
"description": dedent(
"""\
Run arbitrary commands at a rc.local like level with output to the
console. Each item can be either a list or a string. If the item is a
list, it will be properly executed as if passed to ``execve()`` (with
the first arg as the command). If the item is a string, it will be
written to a file and interpreted
using ``sh``.
.. note::
all commands must be proper yaml, so you have to quote any characters
yaml would eat (':' can be problematic)
.. note::
when writing files, do not use /tmp dir as it races with
systemd-tmpfiles-clean LP: #1707222. Use /run/somedir instead.
"""
),
"distros": distros,
"examples": [
dedent(
"""\
runcmd:
- [ ls, -l, / ]
- [ sh, -xc, "echo $(date) ': hello world!'" ]
- [ sh, -c, echo "=========hello world'=========" ]
- ls -l /root
- [ wget, "http://example.org", -O, /tmp/index.html ]
"""
)
],
"frequency": PER_INSTANCE,
}
schema = {
"type": "object",
"properties": {
"runcmd": {
"type": "array",
"items": {
"oneOf": [
{"type": "array", "items": {"type": "string"}},
{"type": "string"},
{"type": "null"},
]
},
"additionalItems": False, # Reject items of non-string non-list
"additionalProperties": False,
"minItems": 1,
}
},
}
__doc__ = get_meta_doc(meta, schema) # Supplement python help()
def handle(name, cfg, cloud, log, _args):
if "runcmd" not in cfg:
log.debug(
"Skipping module named %s, no 'runcmd' key in configuration", name
)
return
validate_cloudconfig_schema(cfg, schema)
out_fn = os.path.join(cloud.get_ipath("scripts"), "runcmd")
cmd = cfg["runcmd"]
try:
content = util.shellify(cmd)
util.write_file(out_fn, content, 0o700)
except Exception as e:
raise type(e)("Failed to shellify {} into file {}".format(cmd, out_fn))
# vi: ts=4 expandtab
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