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34 lines
991 B
Python
34 lines
991 B
Python
from base import Task
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from common import phases
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from common.exceptions import TaskError
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import packages
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class CheckPackages(Task):
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description = 'Checking installed host packages'
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phase = phases.preparation
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after = [packages.HostPackages, packages.ImagePackages]
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def run(self, info):
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import subprocess
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from os import devnull
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for package in info.host_packages:
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try:
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with open(devnull, 'w') as dev_null:
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subprocess.check_call(['/usr/bin/dpkg', '-s', package], stdout=dev_null, stderr=dev_null)
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except subprocess.CalledProcessError:
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msg = "The package ``{0}\'\' is not installed".format(package)
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raise TaskError(msg)
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class GetInfo(Task):
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description = 'Retrieving instance metadata'
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phase = phases.preparation
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def run(self, info):
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import urllib2
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import json
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metadata_url = 'http://169.254.169.254/latest/dynamic/instance-identity/document'
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response = urllib2.urlopen(url=metadata_url, timeout=5)
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info.host = json.load(response)
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return info
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