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###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
import os
from discover.configuration import Configuration
from utils.inventory_mgr import InventoryMgr
from utils.ssh_connection import SshConnection
class SshConn(SshConnection):
config = None
ssh = None
connections = {}
max_call_count_per_con = 100
timeout = 15 # timeout for exec in seconds
def __init__(self, host_name, for_sftp=False):
self.config = Configuration()
self.env_config = self.config.get_env_config()
self.env = self.env_config['name']
self.conf = self.config.get('CLI')
self.gateway = None
self.host = None
self.host_conf = self.get_host_conf(host_name)
self.ssh = None
self.ftp = None
self.for_sftp = for_sftp
self.key = None
self.port = None
self.user = None
self.pwd = None
self.check_definitions()
super().__init__(self.host, self.user, _pwd=self.pwd, _key=self.key,
_port=self.port, for_sftp=for_sftp)
self.inv = InventoryMgr()
if host_name in self.connections and not self.ssh:
self.ssh = self.connections[host_name]
def get_host_conf(self, host_name):
if 'hosts' in self.conf:
if not host_name:
raise ValueError('SshConn(): host must be specified ' +
'if multi-host CLI config is used')
if host_name not in self.conf['hosts']:
raise ValueError('host details missing: ' + host_name)
return self.conf['hosts'][host_name]
else:
return self.conf
def check_definitions(self):
try:
self.host = self.host_conf['host']
if self.host in self.connections:
self.ssh = self.connections[self.host]
except KeyError:
raise ValueError('Missing definition of host for CLI access')
try:
self.user = self.host_conf['user']
except KeyError:
raise ValueError('Missing definition of user for CLI access')
try:
self.key = self.host_conf['key']
if self.key and not os.path.exists(self.key):
raise ValueError('Key file not found: ' + self.key)
except KeyError:
pass
try:
self.pwd = self.host_conf['pwd']
except KeyError:
self.pwd = None
if not self.key and not self.pwd:
raise ValueError('Must specify key or password for CLI access')
gateway_hosts = {}
@staticmethod
def get_gateway_host(host):
if not SshConn.gateway_hosts.get(host):
ssh = SshConn(host)
gateway = ssh.exec('uname -n')
SshConn.gateway_hosts[host] = gateway.strip()
return SshConn.gateway_hosts[host]
def is_gateway_host(self, host):
gateway_host = self.get_gateway_host(host)
return host == gateway_host
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