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# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
"""Write Files: write arbitrary files"""
import base64
import logging
import os
from typing import Optional
from cloudinit import url_helper, util
from cloudinit.cloud import Cloud
from cloudinit.config import Config
from cloudinit.config.schema import MetaSchema
from cloudinit.settings import PER_INSTANCE
DEFAULT_PERMS = 0o644
DEFAULT_DEFER = False
TEXT_PLAIN_ENC = "text/plain"
LOG = logging.getLogger(__name__)
meta: MetaSchema = {
"id": "cc_write_files",
"distros": ["all"],
"frequency": PER_INSTANCE,
"activate_by_schema_keys": ["write_files"],
}
def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None:
file_list = cfg.get("write_files", [])
filtered_files = [
f
for f in file_list
if not util.get_cfg_option_bool(f, "defer", DEFAULT_DEFER)
]
if not filtered_files:
LOG.debug(
"Skipping module named %s,"
" no/empty 'write_files' key in configuration",
name,
)
return
ssl_details = util.fetch_ssl_details(cloud.paths)
write_files(name, filtered_files, cloud.distro.default_owner, ssl_details)
def canonicalize_extraction(encoding_type):
if not encoding_type:
encoding_type = ""
encoding_type = encoding_type.lower().strip()
if encoding_type in ["gz", "gzip"]:
return ["application/x-gzip"]
if encoding_type in ["gz+base64", "gzip+base64", "gz+b64", "gzip+b64"]:
return ["application/base64", "application/x-gzip"]
# Yaml already encodes binary data as base64 if it is given to the
# yaml file as binary, so those will be automatically decoded for you.
# But the above b64 is just for people that are more 'comfortable'
# specifying it manually (which might be a possibility)
if encoding_type in ["b64", "base64"]:
return ["application/base64"]
if encoding_type == TEXT_PLAIN_ENC:
return [TEXT_PLAIN_ENC]
if encoding_type:
LOG.warning(
"Unknown encoding type %s, assuming %s",
encoding_type,
TEXT_PLAIN_ENC,
)
return [TEXT_PLAIN_ENC]
def write_files(name, files, owner: str, ssl_details: Optional[dict] = None):
if not files:
return
for i, f_info in enumerate(files):
path = f_info.get("path")
if not path:
LOG.warning(
"No path provided to write for entry %s in module %s",
i + 1,
name,
)
continue
path = os.path.abspath(path)
# Read content from provided URL, if any, or decode from inline
contents = read_url_or_decode(
f_info.get("source", None),
ssl_details,
f_info.get("content", None),
f_info.get("encoding", None),
)
if contents is None:
LOG.warning(
"No content could be loaded for entry %s in module %s;"
" skipping",
i + 1,
name,
)
continue
# Only create the file if content exists. This will not happen, for
# example, if the URL fails and no inline content was provided
(u, g) = util.extract_usergroup(f_info.get("owner", owner))
perms = decode_perms(f_info.get("permissions"), DEFAULT_PERMS)
omode = "ab" if util.get_cfg_option_bool(f_info, "append") else "wb"
util.write_file(
path, contents, omode=omode, mode=perms, user=u, group=g
)
util.chownbyname(path, u, g)
def decode_perms(perm, default):
if perm is None:
return default
try:
if isinstance(perm, (int, float)):
# Just 'downcast' it (if a float)
return int(perm)
else:
# Force to string and try octal conversion
return int(str(perm), 8)
except (TypeError, ValueError):
reps = []
for r in (perm, default):
try:
reps.append("%o" % r)
except TypeError:
reps.append("%r" % r)
LOG.warning("Undecodable permissions %s, returning default %s", *reps)
return default
def read_url_or_decode(source, ssl_details, content, encoding):
url = None if source is None else source.get("uri", None)
use_url = bool(url)
# Special case: empty URL and content. Write a blank file
if content is None and not use_url:
return ""
# Fetch file content from source URL, if provided
result = None
if use_url:
try:
# NOTE: These retry parameters are arbitrarily chosen defaults.
# They have no significance, and may be changed if appropriate
result = url_helper.read_file_or_url(
url,
headers=source.get("headers", None),
retries=3,
sec_between=3,
ssl_details=ssl_details,
).contents
except Exception:
util.logexc(
LOG,
'Failed to retrieve contents from source "%s"; falling back to'
' data from "contents" key',
url,
)
use_url = False
# If inline content is provided, and URL is not provided or is
# inaccessible, parse the former
if content is not None and not use_url:
# NOTE: This is not simply an "else"! Notice that `use_url` can change
# in the previous "if" block
extractions = canonicalize_extraction(encoding)
result = extract_contents(content, extractions)
return result
def extract_contents(contents, extraction_types):
result = contents
for t in extraction_types:
if t == "application/x-gzip":
result = util.decomp_gzip(result, quiet=False, decode=False)
elif t == "application/base64":
result = base64.b64decode(result)
elif t == TEXT_PLAIN_ENC:
pass
return result
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __pycache__ | Folder | 0755 |
|
|
| schemas | Folder | 0755 |
|
|
| __init__.py | File | 40 B | 0644 |
|
| cc_ansible.py | File | 7.68 KB | 0644 |
|
| cc_apk_configure.py | File | 4.23 KB | 0644 |
|
| cc_apt_configure.py | File | 38.08 KB | 0644 |
|
| cc_apt_pipelining.py | File | 1.85 KB | 0644 |
|
| cc_bootcmd.py | File | 1.65 KB | 0644 |
|
| cc_byobu.py | File | 2.73 KB | 0644 |
|
| cc_ca_certs.py | File | 8.67 KB | 0644 |
|
| cc_chef.py | File | 12.19 KB | 0644 |
|
| cc_disable_ec2_metadata.py | File | 1.6 KB | 0644 |
|
| cc_disk_setup.py | File | 29.61 KB | 0644 |
|
| cc_fan.py | File | 1.95 KB | 0644 |
|
| cc_final_message.py | File | 2.51 KB | 0644 |
|
| cc_growpart.py | File | 18.37 KB | 0644 |
|
| cc_grub_dpkg.py | File | 5.42 KB | 0644 |
|
| cc_install_hotplug.py | File | 3.19 KB | 0644 |
|
| cc_keyboard.py | File | 1.49 KB | 0644 |
|
| cc_keys_to_console.py | File | 2.09 KB | 0644 |
|
| cc_landscape.py | File | 3.06 KB | 0644 |
|
| cc_locale.py | File | 1.19 KB | 0644 |
|
| cc_lxd.py | File | 13.47 KB | 0644 |
|
| cc_mcollective.py | File | 4.11 KB | 0644 |
|
| cc_mounts.py | File | 18.16 KB | 0644 |
|
| cc_ntp.py | File | 18.97 KB | 0644 |
|
| cc_package_update_upgrade_install.py | File | 3.79 KB | 0644 |
|
| cc_phone_home.py | File | 3.75 KB | 0644 |
|
| cc_power_state_change.py | File | 5.92 KB | 0644 |
|
| cc_puppet.py | File | 10.72 KB | 0644 |
|
| cc_reset_rmc.py | File | 4.33 KB | 0644 |
|
| cc_resizefs.py | File | 10.63 KB | 0644 |
|
| cc_resolv_conf.py | File | 3.17 KB | 0644 |
|
| cc_rh_subscription.py | File | 15.21 KB | 0644 |
|
| cc_rsyslog.py | File | 11.55 KB | 0644 |
|
| cc_runcmd.py | File | 1.6 KB | 0644 |
|
| cc_salt_minion.py | File | 3.96 KB | 0644 |
|
| cc_scripts_per_boot.py | File | 1.27 KB | 0644 |
|
| cc_scripts_per_instance.py | File | 1.26 KB | 0644 |
|
| cc_scripts_per_once.py | File | 1.24 KB | 0644 |
|
| cc_scripts_user.py | File | 1.25 KB | 0644 |
|
| cc_scripts_vendor.py | File | 1.26 KB | 0644 |
|
| cc_seed_random.py | File | 3 KB | 0644 |
|
| cc_set_hostname.py | File | 3.4 KB | 0644 |
|
| cc_set_passwords.py | File | 10.32 KB | 0644 |
|
| cc_snap.py | File | 3.36 KB | 0644 |
|
| cc_spacewalk.py | File | 2.64 KB | 0644 |
|
| cc_ssh.py | File | 11 KB | 0644 |
|
| cc_ssh_authkey_fingerprints.py | File | 3.76 KB | 0644 |
|
| cc_ssh_import_id.py | File | 5.43 KB | 0644 |
|
| cc_timezone.py | File | 1.14 KB | 0644 |
|
| cc_ubuntu_autoinstall.py | File | 2.99 KB | 0644 |
|
| cc_ubuntu_drivers.py | File | 4.08 KB | 0644 |
|
| cc_ubuntu_pro.py | File | 13.65 KB | 0644 |
|
| cc_update_etc_hosts.py | File | 2.46 KB | 0644 |
|
| cc_update_hostname.py | File | 2.18 KB | 0644 |
|
| cc_users_groups.py | File | 2.86 KB | 0644 |
|
| cc_wireguard.py | File | 6.67 KB | 0644 |
|
| cc_write_files.py | File | 6 KB | 0644 |
|
| cc_write_files_deferred.py | File | 1.28 KB | 0644 |
|
| cc_yum_add_repo.py | File | 4.53 KB | 0644 |
|
| cc_zypper_add_repo.py | File | 4.93 KB | 0644 |
|
| modules.py | File | 13.23 KB | 0644 |
|
| schema.py | File | 50.26 KB | 0644 |
|