#!/usr/bin/env python
#
# Copyright (c) 2015, Arista Networks, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# - Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
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# - Neither the name of Arista Networks nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARISTA NETWORKS
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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#pylint: disable=W0703
BOOT_CONFIG = '/mnt/flash/boot-config'
[docs]def main(attributes):
'''Installs new software image.
If the current software image is the same as the 'version'
attribute value, then this action is a no-op. Otherwise, the
action will replace the existing software image.
For dual supervisor systems, the image on the active supervisor is
used as reference.
This action is dual-supervisor compatible.
Attributes:
url: path to source image file
version: EOS version of new image file
downgrade: Boolean - Should EOS images be downgraded to match?
(Default: True)
Special_attributes:
NODE: API object - see documentation for details
Example:
::
-
action: install_image
always_execute: true
attributes:
url: files/images/vEOS.swi
version: 4.13.5F
downgrade: true
name: "validate image"
onstart: "Starting to install image"
onsuccess: "SUCCESS: 4.13.5F installed"
onfailure: "FAIL: IM nick@example.com for help"
'''
node = attributes.get('NODE')
url = attributes.get('url')
if not url:
raise Exception('Missing attribute(\'url\')')
downgrade = attributes.get('downgrade', True)
version = attributes.get('version')
if not version:
raise Exception('Missing attribute(\'version\')')
# Return if version matches
current_version = node.api_enable_cmds(['show version'])[0]['version']
if current_version == version:
node.log_msg('install_image: nothing to do: '
'already running the configured version')
return
# Don't downgrade images if flag is set
if downgrade is not True:
from pkg_resources import parse_version
if parse_version(version) < parse_version(current_version):
node.log_msg('install_image: nothing to do: '
'downgrade disabled')
return
# In all other cases, copy the image
image = 'EOS-%s.swi' % version
try:
node.retrieve_url(url, '%s/%s' % (node.flash(), image))
except Exception as exc:
raise Exception('Unable to retrieve image file from URL (%s)' %
exc)
node.api_enable_cmds(['install source flash:%s' % image])