111 lines
3.7 KiB
Python
111 lines
3.7 KiB
Python
# Copyright 2016 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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def get_all_bridged_interfaces_for_node(remote, excluded_criteria=None):
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"""Return all network bridges for a node.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param excluded_criteria: regular expression to filter out items
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:type excluded_criteria: str
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:returns: list of interfaces
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:rtype: list
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"""
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# TODO(rpromyshlennikov): do filtration on python side
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excluded_criteria_cmd = (
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" | grep -v '%s'" % excluded_criteria
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if excluded_criteria else "")
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cmd = "brctl show | awk '/br-/{{print $1}}'{excluded}".format(
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excluded=excluded_criteria_cmd)
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interfaces = remote.check_call(cmd)["stdout"]
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return [iface.strip() for iface in interfaces]
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def switch_interface(remote, interface, up=True):
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"""Turn a network interface up or down.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param interface: interface name.
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:type interface: str
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:param up: whether the interface should be turned up (default: True).
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:type up: boolean
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"""
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method = 'up' if up else 'down'
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cmd = "if{method} {interface}".format(method=method,
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interface=interface)
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remote.check_call(cmd)
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def simulate_network_interrupt_on_node(remote, interval=30):
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"""Simulate a network outage on a node.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param interval: outage duration in seconds (default: 30).
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:type interval: int
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"""
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cmd = (
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"(/sbin/iptables -I INPUT -j DROP && "
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"sleep {interval} && "
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"/sbin/iptables -D INPUT -j DROP) 2>&1>/dev/null &".format(
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interval=interval))
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remote.execute(cmd)
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def get_pids_of_process(remote, name):
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"""Get PIDs of process by its name.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param name: process name.
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:type name: str
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:returns: list of PIDs.
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:rtype: list
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"""
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cmd = "pidof {}".format(name)
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result = remote.execute(cmd)
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if result['exit_code'] != 0:
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return []
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return result['stdout'][0].strip().split()
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def manage_pacemaker_service(remote, name, operation="restart"):
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"""Operate HA service on remote node.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param name: service name.
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:type name: str
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:param operation: type of operation, usually start, stop or restart.
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:type operation: str
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"""
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remote.check_call("crm resource {operation} {service}".format(
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operation=operation, service=name))
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def manage_initctl_service(remote, name, operation="restart"):
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"""Operate service on remote node.
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:param remote: SSH connection to the node.
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:type remote: SSHClient
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:param name: service name.
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:type name: str
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:param operation: type of operation, usually start, stop or restart.
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:type operation: str
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"""
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remote.check_call("initctl {operation} {service}".format(
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operation=operation, service=name))
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