101 lines
2.8 KiB
Python
101 lines
2.8 KiB
Python
# Copyright 2016 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import logging
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import socket
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import common
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from autotest_lib.client.common_lib import hosts
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from autotest_lib.server import utils
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class SshVerifier(hosts.Verifier):
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"""
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Verifier to test a host's accessibility via `ssh`.
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This verifier checks whether a given host is reachable over `ssh`.
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In the event of failure, it distinguishes one of three distinct
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conditions:
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* The host can't be found with a DNS lookup.
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* The host doesn't answer to ping.
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* The host answers to ping, but not to ssh.
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"""
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def verify(self, host):
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if host.is_up():
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return
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msg = 'No answer to ssh from %s'
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try:
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socket.gethostbyname(host.hostname)
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except Exception as e:
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logging.exception('DNS lookup failure')
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msg = 'Unable to look up %%s in DNS: %s' % e
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else:
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if utils.ping(host.hostname, tries=1, deadline=1) != 0:
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msg = 'No answer to ping from %s'
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raise hosts.AutoservVerifyError(msg % host.hostname)
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@property
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def description(self):
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return 'host is available via ssh'
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class LegacyHostVerifier(hosts.Verifier):
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"""
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Ask a Host instance to perform its own verification.
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This class exists as a temporary legacy during refactoring to
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provide access to code that hasn't yet been rewritten to use the new
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repair and verify framework.
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"""
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def verify(self, host):
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host.verify_software()
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host.verify_hardware()
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@property
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def description(self):
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return 'Legacy host verification checks'
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class RebootRepair(hosts.RepairAction):
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"""Repair a target device by rebooting it."""
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def repair(self, host):
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host.reboot()
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@property
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def description(self):
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return 'Reboot the host'
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class RPMCycleRepair(hosts.RepairAction):
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"""
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Cycle AC power using the RPM infrastructure.
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This is meant to catch two distinct kinds of failure:
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* If the target has no battery (that is, a chromebox), power
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cycling it may force it back on.
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* If the target has a batter that is discharging or even fully
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drained, power cycling will leave power on, enabling other
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repair procedures.
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"""
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def repair(self, host):
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if not host.has_power():
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raise hosts.AutoservRepairError(
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'%s has no RPM connection.' % host.hostname)
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host.power_cycle()
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if not host.wait_up(timeout=host.BOOT_TIMEOUT):
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raise hosts.AutoservRepairError(
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'%s is still offline after powercycling' %
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host.hostname)
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@property
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def description(self):
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return 'Power cycle the host with RPM'
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