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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.
**Internal name:** ``cc_salt_minion``
**Module frequency:** per instance
**Supported distros:** all
**Config keys**::
salt_minion:
conf:
master: salt.example.com
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 util
# Note: see http://saltstack.org/topics/installation/
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
salt_cfg = cfg['salt_minion']
# Start by installing the salt package ...
cloud.distro.install_packages(('salt-minion',))
# Ensure we can configure files at the right dir
config_dir = salt_cfg.get("config_dir", '/etc/salt')
util.ensure_dir(config_dir)
# ... and then update the salt configuration
if 'conf' in salt_cfg:
# Add all sections from the conf object to /etc/salt/minion
minion_config = os.path.join(config_dir, 'minion')
minion_data = util.yaml_dumps(salt_cfg.get('conf'))
util.write_file(minion_config, minion_data)
# ... copy the key pair if specified
if 'public_key' in salt_cfg and 'private_key' in salt_cfg:
if os.path.isdir("/etc/salt/pki/minion"):
pki_dir_default = "/etc/salt/pki/minion"
else:
pki_dir_default = "/etc/salt/pki"
pki_dir = salt_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, salt_cfg['public_key'])
util.write_file(pem_name, salt_cfg['private_key'])
# restart salt-minion. 'service' will start even if not started. if it
# was started, it needs to be restarted for config change.
util.subp(['service', 'salt-minion', 'restart'], capture=False)
# vi: ts=4 expandtab
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