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# Author: Jeff Bauer <jbauer@rubic.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
"""
Salt Minion
-----------
**Summary:** set up and run salt minion
This module installs, configures and starts salt minion. If the ``salt_minion``
key is present in the config parts, then salt minion will be installed and
started. Configuration for salt minion can be specified in the ``conf`` key
under ``salt_minion``. Any conf values present there will be assigned in
``/etc/salt/minion``. The public and private keys to use for salt minion can be
specified with ``public_key`` and ``private_key`` respectively. Optionally if
you have a custom package name, service name or config directory you can
specify them with ``pkg_name``, ``service_name`` and ``config_dir``.
**Internal name:** ``cc_salt_minion``
**Module frequency:** per instance
**Supported distros:** all
**Config keys**::
salt_minion:
pkg_name: 'salt-minion'
service_name: 'salt-minion'
config_dir: '/etc/salt'
conf:
master: salt.example.com
grains:
role:
- web
public_key: |
------BEGIN PUBLIC KEY-------
<key data>
------END PUBLIC KEY-------
private_key: |
------BEGIN PRIVATE KEY------
<key data>
------END PRIVATE KEY-------
"""
import os
from cloudinit import safeyaml, subp, util
from cloudinit.distros import rhel_util
# Note: see https://docs.saltstack.com/en/latest/topics/installation/
# Note: see https://docs.saltstack.com/en/latest/ref/configuration/
class SaltConstants(object):
"""
defines default distribution specific salt variables
"""
def __init__(self, cfg):
# constants tailored for FreeBSD
if util.is_FreeBSD():
self.pkg_name = "py36-salt"
self.srv_name = "salt_minion"
self.conf_dir = "/usr/local/etc/salt"
# constants for any other OS
else:
self.pkg_name = "salt-minion"
self.srv_name = "salt-minion"
self.conf_dir = "/etc/salt"
# if there are constants given in cloud config use those
self.pkg_name = util.get_cfg_option_str(cfg, "pkg_name", self.pkg_name)
self.conf_dir = util.get_cfg_option_str(
cfg, "config_dir", self.conf_dir
)
self.srv_name = util.get_cfg_option_str(
cfg, "service_name", self.srv_name
)
def handle(name, cfg, cloud, log, _args):
# If there isn't a salt key in the configuration don't do anything
if "salt_minion" not in cfg:
log.debug(
"Skipping module named %s, no 'salt_minion' key in configuration",
name,
)
return
s_cfg = cfg["salt_minion"]
const = SaltConstants(cfg=s_cfg)
# Start by installing the salt package ...
cloud.distro.install_packages(const.pkg_name)
# Ensure we can configure files at the right dir
util.ensure_dir(const.conf_dir)
# ... and then update the salt configuration
if "conf" in s_cfg:
# Add all sections from the conf object to minion config file
minion_config = os.path.join(const.conf_dir, "minion")
minion_data = safeyaml.dumps(s_cfg.get("conf"))
util.write_file(minion_config, minion_data)
if "grains" in s_cfg:
# add grains to /etc/salt/grains
grains_config = os.path.join(const.conf_dir, "grains")
grains_data = safeyaml.dumps(s_cfg.get("grains"))
util.write_file(grains_config, grains_data)
# ... copy the key pair if specified
if "public_key" in s_cfg and "private_key" in s_cfg:
pki_dir_default = os.path.join(const.conf_dir, "pki/minion")
if not os.path.isdir(pki_dir_default):
pki_dir_default = os.path.join(const.conf_dir, "pki")
pki_dir = s_cfg.get("pki_dir", pki_dir_default)
with util.umask(0o77):
util.ensure_dir(pki_dir)
pub_name = os.path.join(pki_dir, "minion.pub")
pem_name = os.path.join(pki_dir, "minion.pem")
util.write_file(pub_name, s_cfg["public_key"])
util.write_file(pem_name, s_cfg["private_key"])
# we need to have the salt minion service enabled in rc in order to be
# able to start the service. this does only apply on FreeBSD servers.
if cloud.distro.osfamily == "freebsd":
rhel_util.update_sysconfig_file(
"/etc/rc.conf", {"salt_minion_enable": "YES"}
)
# restart salt-minion. 'service' will start even if not started. if it
# was started, it needs to be restarted for config change.
subp.subp(["service", const.srv_name, "restart"], capture=False)
# vi: ts=4 expandtab
|
