github.com/jenkins-x/test-infra@v0.0.7/scenarios/dindind_execute.py (about)

     1  #!/usr/bin/env python
     2  
     3  # Copyright 2018 The Kubernetes Authors.
     4  #
     5  # Licensed under the Apache License, Version 2.0 (the "License");
     6  # you may not use this file except in compliance with the License.
     7  # You may obtain a copy of the License at
     8  #
     9  #     http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  
    17  # Need to figure out why this only fails on travis
    18  # pylint: disable=bad-continuation
    19  
    20  """Prepares for nested docker, and executes a command."""
    21  # TODO(Q-Lee): check the necessity of this once MountPropagation is available in
    22  # prow: https://github.com/kubernetes/kubernetes/pull/59252
    23  
    24  import argparse
    25  import os
    26  import subprocess
    27  import sys
    28  
    29  def check(*cmd):
    30      """Log and run the command, raising on errors."""
    31      print >>sys.stderr, 'Run:', cmd
    32      subprocess.check_call(cmd)
    33  
    34  
    35  def main(envs, cmd):
    36      """Make important mounts r-shared, then run script and verify it exits 0."""
    37      check("mount", "--make-rshared", "/lib/modules")
    38      check("mount", "--make-rshared", "/sys")
    39      check("mount", "--make-rshared", "/")
    40  
    41      for env in envs:
    42          key, val = env.split('=', 1)
    43          print >>sys.stderr, '%s=%s' % (key, val)
    44          os.environ[key] = val
    45      if not cmd:
    46          raise ValueError(cmd)
    47      check(*cmd)
    48  
    49  
    50  if __name__ == '__main__':
    51      PARSER = argparse.ArgumentParser()
    52      PARSER.add_argument('--env', default=[], action='append')
    53      PARSER.add_argument('cmd', nargs=1)
    54      PARSER.add_argument('args', nargs='*')
    55      ARGS = PARSER.parse_args()
    56      main(ARGS.env, ARGS.cmd + ARGS.args)