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Directory : /lib/python3/dist-packages/cloudinit/config/

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Current File : /lib/python3/dist-packages/cloudinit/config//cc_salt_minion.py

# Author: Jeff Bauer <jbauer@rubic.com>
#
# This file is part of cloud-init. See LICENSE file for license information.

"""Salt Minion: Setup and run salt minion"""

import os
from logging import Logger
from textwrap import dedent

from cloudinit import safeyaml, subp, util
from cloudinit.cloud import Cloud
from cloudinit.config import Config
from cloudinit.config.schema import MetaSchema, get_meta_doc
from cloudinit.distros import ALL_DISTROS, bsd_utils
from cloudinit.settings import PER_INSTANCE

MODULE_DESCRIPTION = """\
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``.

Salt keys can be manually generated by: ``salt-key --gen-keys=GEN_KEYS``,
where ``GEN_KEYS`` is the name of the keypair, e.g. 'minion'.  The keypair
will be copied to ``/etc/salt/pki`` on the minion instance.
"""

meta: MetaSchema = {
    "id": "cc_salt_minion",
    "name": "Salt Minion",
    "title": "Setup and run salt minion",
    "description": MODULE_DESCRIPTION,
    "distros": [ALL_DISTROS],
    "frequency": PER_INSTANCE,
    "examples": [
        dedent(
            """\
            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-------
                pki_dir: /etc/salt/pki/minion
            """
        )
    ],
    "activate_by_schema_keys": ["salt_minion"],
}

__doc__ = get_meta_doc(meta)

# Note: see https://docs.saltstack.com/en/latest/topics/installation/
# Note: see https://docs.saltstack.com/en/latest/ref/configuration/


class SaltConstants:
    """
    defines default distribution specific salt variables
    """

    def __init__(self, cfg):

        # constants tailored for FreeBSD
        if util.is_FreeBSD():
            self.pkg_name = "py-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: str, cfg: Config, cloud: Cloud, log: Logger, args: list
) -> None:
    # 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":
        bsd_utils.set_rc_config_value("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

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