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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import netaddr
import re
import time
import six
from tempest.common import ssh
from tempest import config
from tempest import exceptions
CONF = config.CONF
class RemoteClient(object):
# NOTE(afazekas): It should always get an address instead of server
def __init__(self, server, username, password=None, pkey=None):
ssh_timeout = CONF.compute.ssh_timeout
network = CONF.compute.network_for_ssh
ip_version = CONF.compute.ip_version_for_ssh
ssh_channel_timeout = CONF.compute.ssh_channel_timeout
if isinstance(server, six.string_types):
ip_address = server
else:
addresses = server['addresses'][network]
for address in addresses:
if address['version'] == ip_version:
ip_address = address['addr']
break
else:
raise exceptions.ServerUnreachable()
self.ssh_client = ssh.Client(ip_address, username, password,
ssh_timeout, pkey=pkey,
channel_timeout=ssh_channel_timeout)
def exec_command(self, cmd):
return self.ssh_client.exec_command(cmd)
def validate_authentication(self):
"""Validate ssh connection and authentication
This method raises an Exception when the validation fails.
"""
self.ssh_client.test_connection_auth()
def hostname_equals_servername(self, expected_hostname):
# Get host name using command "hostname"
actual_hostname = self.exec_command("hostname").rstrip()
return expected_hostname == actual_hostname
def get_ram_size_in_mb(self):
output = self.exec_command('free -m | grep Mem')
if output:
return output.split()[1]
def get_number_of_vcpus(self):
command = 'cat /proc/cpuinfo | grep processor | wc -l'
output = self.exec_command(command)
return int(output)
def get_partitions(self):
# Return the contents of /proc/partitions
command = 'cat /proc/partitions'
output = self.exec_command(command)
return output
def get_boot_time(self):
cmd = 'cut -f1 -d. /proc/uptime'
boot_secs = self.exec_command(cmd)
boot_time = time.time() - int(boot_secs)
return time.localtime(boot_time)
def write_to_console(self, message):
message = re.sub("([$\\`])", "\\\\\\\\\\1", message)
# usually to /dev/ttyS0
cmd = 'sudo sh -c "echo \\"%s\\" >/dev/console"' % message
return self.exec_command(cmd)
def ping_host(self, host):
addr = netaddr.IPAddress(host)
cmd = 'ping6' if addr.version == 6 else 'ping'
cmd += ' -c1 -w1 {0}'.format(host)
return self.exec_command(cmd)
def get_mac_address(self):
cmd = "/bin/ip addr | awk '/ether/ {print $2}'"
return self.exec_command(cmd)
def get_nic_name(self, address):
cmd = "/bin/ip -o addr | awk '/%s/ {print $2}'" % address
return self.exec_command(cmd)
def get_ip_list(self):
cmd = "/bin/ip address"
return self.exec_command(cmd)
def assign_static_ip(self, nic, addr):
cmd = "sudo /bin/ip addr add {ip}/{mask} dev {nic}".format(
ip=addr, mask=CONF.network.tenant_network_mask_bits,
nic=nic
)
return self.exec_command(cmd)
def turn_nic_on(self, nic):
cmd = "sudo /bin/ip link set {nic} up".format(nic=nic)
return self.exec_command(cmd)
def get_pids(self, pr_name):
# Get pid(s) of a process/program
cmd = "ps -ef | grep %s | grep -v 'grep' | awk {'print $1'}" % pr_name
return self.exec_command(cmd).split('\n')
def get_dns_servers(self):
cmd = 'cat /etc/resolv.conf'
resolve_file = self.exec_command(cmd).strip().split('\n')
entries = (l.split() for l in resolve_file)
dns_servers = [l[1] for l in entries
if len(l) and l[0] == 'nameserver']
return dns_servers
def send_signal(self, pid, signum):
cmd = 'sudo /bin/kill -{sig} {pid}'.format(pid=pid, sig=signum)
return self.exec_command(cmd)
def _renew_lease_udhcpc(self, fixed_ip=None):
"""Renews DHCP lease via udhcpc client. """
file_path = '/var/run/udhcpc.'
nic_name = self.get_nic_name(fixed_ip)
nic_name = nic_name.strip().lower()
pid = self.exec_command('cat {path}{nic}.pid'.
format(path=file_path, nic=nic_name))
pid = pid.strip()
self.send_signal(pid, 'USR1')
def _renew_lease_dhclient(self, fixed_ip=None):
"""Renews DHCP lease via dhclient client. """
cmd = "sudo /sbin/dhclient -r && sudo /sbin/dhclient"
self.exec_command(cmd)
def renew_lease(self, fixed_ip=None):
"""Wrapper method for renewing DHCP lease via given client
Supporting:
* udhcpc
* dhclient
"""
# TODO(yfried): add support for dhcpcd
suported_clients = ['udhcpc', 'dhclient']
dhcp_client = CONF.scenario.dhcp_client
if dhcp_client not in suported_clients:
raise exceptions.InvalidConfiguration('%s DHCP client unsupported'
% dhcp_client)
if dhcp_client == 'udhcpc' and not fixed_ip:
raise ValueError("need to set 'fixed_ip' for udhcpc client")
return getattr(self, '_renew_lease_' + dhcp_client)(fixed_ip=fixed_ip)
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