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https://github.com/vmware/vsphere-automation-sdk-python.git
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303 lines
13 KiB
Python
303 lines
13 KiB
Python
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#!/usr/bin/env python
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"""
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* *******************************************************
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* Copyright (c) VMware, Inc. 2020. All Rights Reserved.
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* SPDX-License-Identifier: MIT
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* *******************************************************
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*
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* DISCLAIMER. THIS PROGRAM IS PROVIDED TO YOU "AS IS" WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, WHETHER ORAL OR WRITTEN,
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* EXPRESS OR IMPLIED. THE AUTHOR SPECIFICALLY DISCLAIMS ANY IMPLIED
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* WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY,
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* NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE.
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"""
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__author__ = 'VMware Inc.'
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__vcenter_version__ = 'VCenter 7.0 U2'
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import os
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import ssl
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import time
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from com.vmware.vcenter.vm.guest.filesystem_client import Transfers
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from com.vmware.vcenter.vm.guest_client import Credentials
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from com.vmware.vcenter.vm.guest_client import Processes
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from com.vmware.vcenter_client import VM
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from samples.vsphere.common import sample_cli
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from samples.vsphere.common import sample_util
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from samples.vsphere.common.ssl_helper import get_unverified_session
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from vmware.vapi.vsphere.client import create_vsphere_client
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try:
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# Python 3
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from urllib.parse import urlparse
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import http.client as httpclient
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except ImportError:
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# Python 2
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from urlparse import urlparse
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import httplib as httpclient
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class GuestOps(object):
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"""
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Demonstrate the vAPI Guest Operations.
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Show the basic procedure to start a program or process on a Linux
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guest VM and collect any output:
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- create a temporary directory and temporary files for the process
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stdout and stderr.
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- upload a script to the guest.
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- execute the script and collect the output.
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Prerequisites:
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- vCenter
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- ESX host
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- running guest 'Photon-3.2-64-EFI-Open-VM-Tools-for-GuestOps-SDK'
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with open-vm-tools installed and running. The testbed created by
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samples/vsphere/vcenter/setup/main.py does not contain a guest
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with a runnable Linux or Windows OS.
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"""
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# Create the Process.CreateSpec for initiating processes in the guest
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def _process_create_spec(self, path, args=None, dir=None, env={}):
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return Processes.CreateSpec(path=path,
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arguments=args,
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working_directory=dir,
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environment_variables=env)
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# Create the Transfer.CreateSpec for the file transfer to/from the guest
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def _create_transfer_spec(self,
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path,
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attributes=None):
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return Transfers.CreateSpec(attributes=attributes,
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path=path)
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# Create a FileAttributeCreateSpec for a generic (non-OS specific) guest
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def _fileAttributeCreateSpec_Plain(self,
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size,
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overwrite=None,
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last_modified=None,
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last_accessed=None):
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return Transfers.FileCreationAttributes(size,
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overwrite=overwrite,
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last_modified=last_modified,
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last_accessed=last_accessed)
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# Create a FileAttributeCreateSpec for a linux (Posix) guest
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def _fileAttributeCreateSpec_Linux(self,
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size,
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overwrite=None,
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last_modified=None,
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last_accessed=None,
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owner_id=None,
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group_id=None,
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permissions=None):
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posix = Transfers.PosixFileAttributesCreateSpec(owner_id=owner_id,
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group_id=group_id,
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permissions=permissions)
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return Transfers.FileCreationAttributes(size,
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overwrite=overwrite,
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last_modified=last_modified,
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last_accessed=last_accessed,
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posix=posix)
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def _download(self,
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url,
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expectedLen=None):
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urloptions = urlparse(url)
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# Skip server cert verification.
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# This is not recommended in production code.
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conn = httpclient.HTTPSConnection(urloptions.netloc,
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context=ssl._create_unverified_context())
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conn.request("GET", urloptions.path + "?" + urloptions.query)
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res = conn.getresponse()
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if res.status != 200:
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print("GET request failed with errorcode : %s" % res.status)
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raise HTTPError(res.status, res.reason)
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body = res.read().decode()
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return body
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def _upload(self, url, body):
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urloptions = urlparse(url)
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conn = httpclient.HTTPSConnection(urloptions.netloc,
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context=ssl._create_unverified_context())
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headers = {"Content-Length": len(body)}
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# Skip server cert verification.
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# This is not recommended in production code.
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conn.request("PUT", urloptions.path + "?" + urloptions.query,
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body,
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headers)
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res = conn.getresponse()
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if res.status != 200:
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print("PUT request failed with errorcode : %s" % res.status)
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raise HTTPError(res.status, res.reason)
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return res
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def __init__(self):
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# Create argument parser for standard inputs:
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# server, username, password, cleanup and skipverification
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parser = sample_cli.build_arg_parser()
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# Add your custom input arguments
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parser.add_argument('--vm_name',
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action='store',
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help='Name of the testing vm')
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parser.add_argument('--root_user',
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action='store',
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help='Administrator account user name')
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parser.add_argument('--root_passwd',
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action='store',
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help='Administrator account password')
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args = sample_util.process_cli_args(parser.parse_args())
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self.vm_name = args.vm_name
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self.root_user = args.root_user
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self.root_passwd = args.root_passwd
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self.cleardata = args.cleardata
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# Skip server cert verification if needed.
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# This is not recommended in production code.
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session = get_unverified_session() if args.skipverification else None
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# Connect to vSphere client
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self.client = create_vsphere_client(server=args.server,
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username=args.username,
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password=args.password,
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session=session)
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def run(self):
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# Using vAPI to find VM.
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filter_spec = VM.FilterSpec(names=set([self.vm_name]))
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vms = self.client.vcenter.VM.list(filter_spec)
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if len(vms) != 1:
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raise Exception('Could not locate the required VM with name ' +
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self.vm_name + '. Please create the vm first.')
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if vms[0].power_state != 'POWERED_ON':
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raise Exception('VM is not powered on: ' + vms[0].power_state)
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vm_id = vms[0].vm
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# Check that vmtools svc (non-interactive user) is running.
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info = self.client.vcenter.vm.guest.Operations.get(vm_id)
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if info.guest_operations_ready is not True:
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raise Exception('VMware Tools/open-vm-tools is not running as required.')
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# Establish the user credentials that will be needed for all Guest Ops
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# APIs.
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creds = Credentials(interactive_session=False,
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user_name=self.root_user,
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password=self.root_passwd,
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type=Credentials.Type.USERNAME_PASSWORD)
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# Step 2 - Create a temporary directory from which to run the command
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# and capture any output
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tempDir = self.client.vcenter.vm.guest.filesystem.Directories.create_temporary(
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vm_id, creds, '', '', parent_path=None)
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# Step 3 - Create temproary files to reveive stdout and stderr
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# as needed.
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stdout = self.client.vcenter.vm.guest.filesystem.Files.create_temporary(
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vm_id, creds, '', '.stdout', parent_path=tempDir)
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stderr = self.client.vcenter.vm.guest.filesystem.Files.create_temporary(
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vm_id, creds, '', '.stderr', parent_path=tempDir)
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# Step 4 - (Optional) copy in the script to be run.
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# While optional, using this step to demo tranfer of a
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# file to a guest.
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scriptPath = self.client.vcenter.vm.guest.filesystem.Files.create_temporary(
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vm_id, creds, '', '.sh', tempDir)
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# Create script contents and transfer to the guest.
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# TODO: Need generic pick up of script content
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baseFN = os.path.basename(scriptPath)
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script = ('#! /bin/bash\n'
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'# ' +
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baseFN + '\n'
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'\n'
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'sleep 5 # Adding a little length to the process.\n'
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'ps -ef\n'
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'echo\n'
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'rpm -qa | sort\n'
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'\n')
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print(script)
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attr = self._fileAttributeCreateSpec_Linux(size=len(script),
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overwrite=True,
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permissions='0755')
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spec = self._create_transfer_spec(path=scriptPath,
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attributes=attr)
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toURL = self.client.vcenter.vm.guest.filesystem.Transfers.create(vm_id,
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creds,
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spec)
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res = self._upload(toURL, script)
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# Check that the uploaded file size is correct.
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info = self.client.vcenter.vm.guest.filesystem.Files.get(vm_id,
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creds,
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scriptPath)
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if info.size != len(script):
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raise Exception('Uploaded file size not as epected.')
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# Step 5 - Start the program on the guest, capturing stdout and stderr
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# in the separate temp files obtained earlier.
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options = (" > " + stdout + " 2> " + stderr)
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spec = self._process_create_spec(scriptPath,
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args=options,
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dir=tempDir)
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pid = self.client.vcenter.vm.guest.Processes.create(vm_id, creds, spec)
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print('process created with pid: %s\n' % pid)
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# Step 6
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# Need a loop to wait for the process to finish to handle longer
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# running processes.
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while True:
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time.sleep(1.0)
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try:
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# List the single process for pid.
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result = self.client.vcenter.vm.guest.Processes.get(vm_id,
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creds,
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pid)
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if result.exit_code is not None:
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print('Command: ' + result.command)
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print('Exit code: %s\n' % result.exit_code)
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break
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if result.finished is None:
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print('Process with pid %s is still running.' % pid)
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continue
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except Exception as e:
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raise e
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# Step 7 Copy out the results (stdout).
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spec = self._create_transfer_spec(path=stdout)
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# create the download URL
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fromURL = self.client.vcenter.vm.guest.filesystem.Transfers.create(vm_id,
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creds,
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spec)
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body = self._download(fromURL, expectedLen=info.size)
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print("----------- stdout ------------------")
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print(body)
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print("---------------------------------------")
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# Optionally the contents of "stderr" could be downloaded.
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# And finally, clean up the temporary files and directories on the
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# Linux guest. Deleting the temporary diretory and its contents.
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self.client.vcenter.vm.guest.filesystem.Directories.delete(vm_id,
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creds,
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tempDir,
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recursive=True)
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def main():
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sample = GuestOps()
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sample.run()
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if __name__ == '__main__':
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main()
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