okd/bin/oscp

#!/usr/bin/env python2
# vim: expandtab:tabstop=4:shiftwidth=4

import argparse
import traceback
import sys
import os
import re
import ConfigParser

from openshift_ansible import awsutil

CONFIG_MAIN_SECTION = 'main'
CONFIG_INVENTORY_OPTION = 'inventory'

class Oscp(object):
    def __init__(self):
        self.inventory = None
        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()

        # parse host and user
        self.process_host()

        self.aws = awsutil.AwsUtil(self.inventory)

        # get a dict of host inventory
        if self.args.list:
            self.get_hosts()
        else:
            self.get_hosts(True)

        if (self.args.src == '' or self.args.dest == '') and not self.args.list:
            self.parser.print_help()
            return

        if self.args.debug:
            print self.host
            print self.args

        # perform the scp
        if self.args.list:
            self.list_hosts()
        else:
            self.scp()

    def parse_config_file(self):
        if os.path.isfile(self.config_path):
            config = ConfigParser.ConfigParser()
            config.read(self.config_path)

            if config.has_section(CONFIG_MAIN_SECTION) and \
               config.has_option(CONFIG_MAIN_SECTION, CONFIG_INVENTORY_OPTION):
                self.inventory = config.get(CONFIG_MAIN_SECTION, CONFIG_INVENTORY_OPTION)

    def parse_cli_args(self):
        parser = argparse.ArgumentParser(description='Openshift Online SSH Tool.')
        parser.add_argument('-e', '--env',
                          action="store", help="Environment where this server exists.")
        parser.add_argument('-d', '--debug', default=False,
                          action="store_true", help="debug mode")
        parser.add_argument('-v', '--verbose', default=False,
                          action="store_true", help="Verbose?")
        parser.add_argument('--list', default=False,
                          action="store_true", help="list out hosts")
        parser.add_argument('-r', '--recurse', action='store_true', default=False,
                            help='Recursively copy files to or from destination.')
        parser.add_argument('-o', '--ssh_opts', action='store',
                            help='options to pass to SSH.\n \
                                  "-oPort=22,TCPKeepAlive=yes"')

        parser.add_argument('src', nargs='?', default='')
        parser.add_argument('dest',nargs='?', default='')

        self.args = parser.parse_args()
        self.parser = parser


    def process_host(self):
        '''Determine host name and user name for SSH.
        '''
        self.user = ''

        # is the first param passed a valid file?
        if os.path.isfile(self.args.src) or os.path.isdir(self.args.src):
            self.local_src = True
            self.host = self.args.dest
        else:
            self.local_src = False
            self.host = self.args.src

        if '@' in self.host:
            re_host = re.compile("(.*@)(.*)(:.*$)")
        else:
            re_host = re.compile("(.*)(:.*$)")

        search = re_host.search(self.host)

        if search:
            if len(search.groups()) > 2:
                self.user = search.groups()[0]
                self.host = search.groups()[1]
                self.path = search.groups()[2]
            else:
                self.host = search.groups()[0]
                self.path = search.groups()[1]

        if self.args.env:
            self.env = self.args.env
        elif "." in self.host:
            self.host, self.env = self.host.split(".")
        else:
            self.env = None

    def get_hosts(self, cache_only=False):
        '''Query our host inventory and return a dict where the format
           equals:

           dict['environment'] = [{'servername' : {}}, ]
        '''
        if cache_only:
            self.host_inventory = self.aws.build_host_dict_by_env(['--cache-only'])
        else:
            self.host_inventory = self.aws.build_host_dict_by_env()

    def select_host(self):
        '''select host attempts to match the host specified
           on the command line with a list of hosts.
        '''
        results = []
        for env in self.host_inventory.keys():
            for hostname, server_info in self.host_inventory[env].items():
                if hostname.split(':')[0] == self.host:
                    results.append((hostname, server_info))

        # attempt to select the correct environment if specified
        if self.env:
            results = filter(lambda result: result[1]['ec2_tag_environment'] == self.env, results)

        if results:
            return results
        else:
            print "Could not find specified host: %s." % self.host

        # default - no results found.
        return None

    def list_hosts(self, limit=None):
        '''Function to print out the host inventory.

           Takes a single parameter to limit the number of hosts printed.
        '''

        if self.env:
            results = self.select_host()
            if len(results) == 1:
                hostname, server_info = results[0]
                sorted_keys = server_info.keys()
                sorted_keys.sort()
                for key in sorted_keys:
                    print '{0:<35} {1}'.format(key, server_info[key])
            else:
                for host_id, server_info in results[:limit]:
                    name = server_info['ec2_tag_Name']
                    ec2_id = server_info['ec2_id']
                    ip = server_info['ec2_ip_address']
                    print '{ec2_tag_Name:<35} {ec2_tag_environment:<8} {ec2_id:<15} {ec2_ip_address}'.format(**server_info)

                if limit:
                    print
                    print 'Showing only the first %d results...' % limit
                    print

        else:
            for env, host_ids in self.host_inventory.items():
                for host_id, server_info in host_ids.items():
                    name = server_info['ec2_tag_Name']
                    ec2_id = server_info['ec2_id']
                    ip = server_info['ec2_ip_address']
                    print '{ec2_tag_Name:<35} {ec2_tag_environment:<5} {ec2_id:<15} {ec2_ip_address}'.format(**server_info)

    def scp(self):
        '''scp files to or from a specified host
        '''
        try:
            # shell args start with the program name in position 1
            scp_args = ['/usr/bin/scp']

            if self.args.verbose:
                scp_args.append('-v')

            if self.args.recurse:
                scp_args.append('-r')

            if self.args.ssh_opts:
                for arg in self.args.ssh_opts.split(","):
                    scp_args.append("-o%s" % arg)

            results = self.select_host()

            if self.args.debug: print results

            if not results:
                return # early exit, no results

            if len(results) > 1:
                print "Multiple results found for %s." % self.host
                for result in results:
                    print "{ec2_tag_Name:<35} {ec2_tag_environment:<5} {ec2_id:<10}".format(**result[1])
                return # early exit, too many results

            # Assume we have one and only one.
            hostname, server_info = results[0]
            dns = server_info['ec2_public_dns_name']

            host_str = "%s%s%s" % (self.user, dns, self.path)

            if self.local_src:
                scp_args.append(self.args.src)
                scp_args.append(host_str)
            else:
                scp_args.append(host_str)
                scp_args.append(self.args.dest)

            print "Running: %s\n" % ' '.join(scp_args)

            os.execve('/usr/bin/scp', scp_args, os.environ)
        except:
            print traceback.print_exc()
            print sys.exc_info()


if __name__ == '__main__':
    oscp = Oscp()