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"""
Ansible action plugin to ensure inventory variables are set
appropriately and no conflicting options have been provided.
"""
from ansible.plugins.action import ActionBase
from ansible import errors
# Tuple of variable names and default values if undefined.
NET_PLUGIN_LIST = (('openshift_use_openshift_sdn', True),
('openshift_use_flannel', False),
('openshift_use_nuage', False),
('openshift_use_contiv', False),
('openshift_use_calico', False))
def to_bool(var_to_check):
"""Determine a boolean value given the multiple
ways bools can be specified in ansible."""
yes_list = (True, 1, "True", "1", "true", "Yes", "yes")
return var_to_check in yes_list
class ActionModule(ActionBase):
"""Action plugin to execute sanity checks."""
def template_var(self, hostvars, host, varname):
"""Retrieve a variable from hostvars and template it.
If undefined, return None type."""
res = hostvars[host].get(varname)
if res is None:
return None
return self._templar.template(res)
def check_python_version(self, hostvars, host, distro):
"""Ensure python version is 3 for Fedora and python 2 for others"""
ansible_python = self.template_var(hostvars, host, 'ansible_python')
if distro == "Fedora":
if ansible_python['version']['major'] != 3:
msg = "openshift-ansible requires Python 3 for {};".format(distro)
msg += " For information on enabling Python 3 with Ansible,"
msg += " see https://docs.ansible.com/ansible/python_3_support.html"
raise errors.AnsibleModuleError(msg)
else:
if ansible_python['version']['major'] != 2:
msg = "openshift-ansible requires Python 2 for {};".format(distro)
def network_plugin_check(self, hostvars, host):
"""Ensure only one type of network plugin is enabled"""
res = []
# Loop through each possible network plugin boolean, determine the
# actual boolean value, and append results into a list.
for plugin, default_val in NET_PLUGIN_LIST:
res_temp = self.template_var(hostvars, host, plugin)
if res_temp is None:
res_temp = default_val
res.append(to_bool(res_temp))
if sum(res) != 1:
plugin_str = list(zip([x[0] for x in NET_PLUGIN_LIST], res))
msg = "Host Checked: {} Only one of must be true. Found: {}".format(host, plugin_str)
raise errors.AnsibleModuleError(msg)
def check_hostname_vars(self, hostvars, host):
"""Checks to ensure openshift_hostname
and openshift_public_hostname
conform to the proper length of 63 characters or less"""
for varname in ('openshift_public_hostname', 'openshift_hostname'):
var_value = self.template_var(hostvars, host, varname)
if var_value and len(var_value) > 63:
msg = '{} must be 63 characters or less'.format(varname)
raise errors.AnsibleModuleError(msg)
def run_checks(self, hostvars, host):
"""Execute the hostvars validations against host"""
distro = self.template_var(hostvars, host, 'ansible_distribution')
self.check_python_version(hostvars, host, distro)
self.network_plugin_check(hostvars, host)
self.check_hostname_vars(hostvars, host)
def run(self, tmp=None, task_vars=None):
result = super(ActionModule, self).run(tmp, task_vars)
# self.task_vars holds all in-scope variables.
# Ignore settting self.task_vars outside of init.
# pylint: disable=W0201
self.task_vars = task_vars or {}
# self._task.args holds task parameters.
# check_hosts is a parameter to this plugin, and should provide
# a list of hosts.
check_hosts = self._task.args.get('check_hosts')
if not check_hosts:
msg = "check_hosts is required"
raise errors.AnsibleModuleError(msg)
# We need to access each host's variables
hostvars = self.task_vars.get('hostvars')
if not hostvars:
msg = hostvars
raise errors.AnsibleModuleError(msg)
# We loop through each host in the provided list check_hosts
for host in check_hosts:
self.run_checks(hostvars, host)
result["changed"] = False
result["failed"] = False
result["msg"] = "Sanity Checks passed"
return result
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