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#!/usr/bin/env python
'''
Ohi = Openshift Host Inventory
This script provides an easy way to look at your host inventory.
This depends on multi_inventory being setup correctly.
'''
# vim: expandtab:tabstop=4:shiftwidth=4
import argparse
import sys
import os
import ConfigParser
from openshift_ansible import awsutil
from openshift_ansible import utils
from openshift_ansible.awsutil import ArgumentError
CONFIG_MAIN_SECTION = 'main'
CONFIG_HOST_TYPE_ALIAS_SECTION = 'host_type_aliases'
class Ohi(object):
'''
Class for managing openshift host inventory
'''
def __init__(self):
self.host_type_aliases = {}
self.file_path = os.path.join(os.path.dirname(os.path.realpath(__file__)))
# Default the config path to /etc
self.config_path = os.path.join(os.path.sep, 'etc', \
'openshift_ansible', \
'openshift_ansible.conf')
self.parse_cli_args()
self.parse_config_file()
self.aws = awsutil.AwsUtil(self.host_type_aliases)
def run(self):
'''
Call into awsutil and retrieve the desired hosts and environments
'''
if self.args.list_host_types:
self.aws.print_host_types()
return 0
hosts = None
if self.args.host_type is not None and \
self.args.env is not None:
# Both env and host-type specified
hosts = self.aws.get_host_list(host_type=self.args.host_type,
envs=self.args.env,
version=self.args.openshift_version,
cached=self.args.cache_only)
if self.args.host_type is None and \
self.args.env is not None:
# Only env specified
hosts = self.aws.get_host_list(envs=self.args.env,
version=self.args.openshift_version,
cached=self.args.cache_only)
if self.args.host_type is not None and \
self.args.env is None:
# Only host-type specified
hosts = self.aws.get_host_list(host_type=self.args.host_type,
version=self.args.openshift_version,
cached=self.args.cache_only)
if hosts is None:
# We weren't able to determine what they wanted to do
raise ArgumentError("Invalid combination of arguments")
for host in sorted(hosts, key=utils.normalize_dnsname):
if self.args.user:
print "%s@%s" % (self.args.user, host)
else:
print host
return 0
def parse_config_file(self):
'''
Parse the config file for ohi
'''
if os.path.isfile(self.config_path):
config = ConfigParser.ConfigParser()
config.read(self.config_path)
self.host_type_aliases = {}
if config.has_section(CONFIG_HOST_TYPE_ALIAS_SECTION):
for alias in config.options(CONFIG_HOST_TYPE_ALIAS_SECTION):
value = config.get(CONFIG_HOST_TYPE_ALIAS_SECTION, alias).split(',')
self.host_type_aliases[alias] = value
def parse_cli_args(self):
"""Setup the command line parser with the options we want
"""
parser = argparse.ArgumentParser(description='OpenShift Host Inventory')
parser.add_argument('--list-host-types', default=False, action='store_true', help='List all of the host types')
parser.add_argument('-e', '--env', action="store", help="Which environment to use")
parser.add_argument('-t', '--host-type', action="store", help="Which host type to use")
parser.add_argument('-l', '--user', action='store', default=None, help='username')
parser.add_argument('-c', '--cache-only', action='store_true', default=False,
help='Retrieve the host inventory by cache only. Default is false.')
parser.add_argument('-o', '--openshift-version', action='store', default='2',
help='Specify the openshift version. Default is 2')
self.args = parser.parse_args()
def main():
'''
Ohi will do its work here
'''
if len(sys.argv) == 1:
print "\nError: No options given. Use --help to see the available options\n"
sys.exit(0)
try:
ohi = Ohi()
exitcode = ohi.run()
sys.exit(exitcode)
except ArgumentError as err:
print "\nError: %s\n" % err.message
if __name__ == '__main__':
main()
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