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#!/usr/bin/env python
# ============LICENSE_START==========================================
# ===================================================================
# Copyright © 2017 AT&T
#
# 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.
#============LICENSE_END============================================
# This tack will be triggered after VM created. It will check whether docker is up and running.
import subprocess
from cloudify import ctx
from cloudify.exceptions import OperationRetry
def check_command(command):
try:
process = subprocess.Popen(
command.split()
)
except OSError:
return False
output, error = process.communicate()
ctx.logger.debug('command: {0} '.format(command))
ctx.logger.debug('output: {0} '.format(output))
ctx.logger.debug('error: {0} '.format(error))
ctx.logger.debug('process.returncode: {0} '.format(process.returncode))
if process.returncode:
ctx.logger.error('Running `{0}` returns error.'.format(command))
return False
return True
def execute_command(_command):
ctx.logger.debug('_command {0}.'.format(_command))
subprocess_args = {
'args': _command.split(),
'stdout': subprocess.PIPE,
'stderr': subprocess.PIPE
}
ctx.logger.debug('subprocess_args {0}.'.format(subprocess_args))
process = subprocess.Popen(**subprocess_args)
output, error = process.communicate()
ctx.logger.debug('command: {0} '.format(_command))
ctx.logger.debug('error: {0} '.format(error))
ctx.logger.debug('process.returncode: {0} '.format(process.returncode))
if process.returncode:
ctx.logger.error('Running `{0}` returns error.'.format(_command))
return False
return output
if __name__ == '__main__':
# Check if Docker PS works
docker = check_command('docker ps')
if not docker:
raise OperationRetry(
'Docker is not present on the system.')
ctx.logger.info('Docker is present on the system.')
# Next check if Cloud Init is running.
finished = False
ps = execute_command('ps -ef')
for line in ps.split('\n'):
if '/usr/bin/python /usr/bin/cloud-init modules' in line:
raise OperationRetry(
'You provided a Cloud-init Cloud Config to configure instances. '
'Waiting for Cloud-init to complete.')
ctx.logger.info('Cloud-init finished.')
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