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mininet / util / vm / build.py @ 2ca1ea92

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#!/usr/bin/python
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"""
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build.py: build a Mininet VM
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Basic idea:
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    prepare
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    -> create base install image if it's missing
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        - download iso if it's missing
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        - install from iso onto image
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    build
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    -> create cow disk for new VM, based on base image
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    -> boot it in qemu/kvm with text /serial console
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    -> install Mininet
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    test
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    -> sudo mn --test pingall
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    -> make test
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    release
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    -> shut down VM
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    -> shrink-wrap VM
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    -> upload to storage
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"""
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import os
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from os import stat, path
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from stat import ST_MODE, ST_SIZE
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from os.path import abspath
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from sys import exit, stdout, argv, modules
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import re
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from glob import glob
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from subprocess import check_output, call, Popen
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from tempfile import mkdtemp, NamedTemporaryFile
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from time import time, strftime, localtime
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import argparse
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from distutils.spawn import find_executable
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import inspect
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pexpect = None  # For code check - imported dynamically
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# boot can be slooooow!!!! need to debug/optimize somehow
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TIMEOUT=600
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# Some configuration options
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# Possibly change this to use the parsed arguments instead!
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LogToConsole = False        # VM output to console rather than log file
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SaveQCOW2 = False           # Save QCOW2 image rather than deleting it
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NoKVM = False               # Don't use kvm and use emulation instead
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Branch = None               # Branch to update and check out before testing
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Zip = False                  # Archive .ovf and .vmdk into a .zip file
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VMImageDir = os.environ[ 'HOME' ] + '/vm-images'
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Prompt = '\$ '              # Shell prompt that pexpect will wait for
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isoURLs = {
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    'precise32server':
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    'http://mirrors.kernel.org/ubuntu-releases/12.04/'
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    'ubuntu-12.04.3-server-i386.iso',
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    'precise64server':
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    'http://mirrors.kernel.org/ubuntu-releases/12.04/'
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    'ubuntu-12.04.3-server-amd64.iso',
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    'quantal32server':
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    'http://mirrors.kernel.org/ubuntu-releases/12.10/'
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    'ubuntu-12.10-server-i386.iso',
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    'quantal64server':
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    'http://mirrors.kernel.org/ubuntu-releases/12.10/'
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    'ubuntu-12.10-server-amd64.iso',
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    'raring32server':
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    'http://mirrors.kernel.org/ubuntu-releases/13.04/'
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    'ubuntu-13.04-server-i386.iso',
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    'raring64server':
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    'http://mirrors.kernel.org/ubuntu-releases/13.04/'
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    'ubuntu-13.04-server-amd64.iso',
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    'saucy32server':
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    'http://mirrors.kernel.org/ubuntu-releases/13.10/'
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    'ubuntu-13.10-server-i386.iso',
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    'saucy64server':
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    'http://mirrors.kernel.org/ubuntu-releases/13.10/'
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    'ubuntu-13.10-server-amd64.iso',
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}
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def OSVersion( flavor ):
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    "Return full OS version string for build flavor"
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    urlbase = path.basename( isoURLs.get( flavor, 'unknown' ) )
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    return path.splitext( urlbase )[ 0 ]
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LogStartTime = time()
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LogFile = None
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def log( *args, **kwargs ):
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    """Simple log function: log( message along with local and elapsed time
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       cr: False/0 for no CR"""
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    cr = kwargs.get( 'cr', True )
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    elapsed = time() - LogStartTime
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    clocktime = strftime( '%H:%M:%S', localtime() )
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    msg = ' '.join( str( arg ) for arg in args )
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    output = '%s [ %.3f ] %s' % ( clocktime, elapsed, msg )
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    if cr:
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        print output
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    else:
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        print output,
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    # Optionally mirror to LogFile
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    if type( LogFile ) is file:
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        if cr:
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            output += '\n'
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        LogFile.write( output )
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        LogFile.flush()
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def run( cmd, **kwargs ):
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    "Convenient interface to check_output"
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    log( '-', cmd )
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    cmd = cmd.split()
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    arg0 = cmd[ 0 ]
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    if not find_executable( arg0 ):
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        raise Exception( 'Cannot find executable "%s";' % arg0 +
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                         'you might try %s --depend' % argv[ 0 ] )
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    return check_output( cmd, **kwargs )
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def srun( cmd, **kwargs ):
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    "Run + sudo"
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    return run( 'sudo ' + cmd, **kwargs )
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# BL: we should probably have a "checkDepend()" which
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# checks to make sure all dependencies are satisfied!
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def depend():
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    "Install package dependencies"
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    log( '* Installing package dependencies' )
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    run( 'sudo apt-get -y update' )
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    run( 'sudo apt-get install -y'
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         ' kvm cloud-utils genisoimage qemu-kvm qemu-utils'
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         ' e2fsprogs '
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         ' landscape-client'
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         ' python-setuptools mtools zip' )
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    run( 'sudo easy_install pexpect' )
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def popen( cmd ):
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    "Convenient interface to popen"
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    log( cmd )
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    cmd = cmd.split()
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    return Popen( cmd )
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def remove( fname ):
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    "Remove a file, ignoring errors"
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    try:
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        os.remove( fname )
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    except OSError:
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        pass
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def findiso( flavor ):
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    "Find iso, fetching it if it's not there already"
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    url = isoURLs[ flavor ]
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    name = path.basename( url )
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    iso = path.join( VMImageDir, name )
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    if not path.exists( iso ) or ( stat( iso )[ ST_MODE ] & 0777 != 0444 ):
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        log( '* Retrieving', url )
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        run( 'curl -C - -o %s %s' % ( iso, url ) )
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        if 'ISO' not in run( 'file ' + iso ):
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            os.remove( iso )
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            raise Exception( 'findiso: could not download iso from ' + url )
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        # Write-protect iso, signaling it is complete
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        log( '* Write-protecting iso', iso)
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        os.chmod( iso, 0444 )
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    log( '* Using iso', iso )
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    return iso
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def attachNBD( cow, flags='' ):
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    """Attempt to attach a COW disk image and return its nbd device
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        flags: additional flags for qemu-nbd (e.g. -r for readonly)"""
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    # qemu-nbd requires an absolute path
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    cow = abspath( cow )
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    log( '* Checking for unused /dev/nbdX device ' )
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    for i in range ( 0, 63 ):
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        nbd = '/dev/nbd%d' % i
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        # Check whether someone's already messing with that device
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        if call( [ 'pgrep', '-f', nbd ] ) == 0:
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            continue
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        srun( 'modprobe nbd max-part=64' )
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        srun( 'qemu-nbd %s -c %s %s' % ( flags, nbd, cow ) )
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        print
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        return nbd
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    raise Exception( "Error: could not find unused /dev/nbdX device" )
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def detachNBD( nbd ):
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    "Detatch an nbd device"
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    srun( 'qemu-nbd -d ' + nbd )
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def extractKernel( image, flavor, imageDir=VMImageDir ):
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    "Extract kernel and initrd from base image"
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    kernel = path.join( imageDir, flavor + '-vmlinuz' )
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    initrd = path.join( imageDir, flavor + '-initrd' )
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    if path.exists( kernel ) and ( stat( image )[ ST_MODE ] & 0777 ) == 0444:
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        # If kernel is there, then initrd should also be there
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        return kernel, initrd
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    log( '* Extracting kernel to', kernel )
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    nbd = attachNBD( image, flags='-r' )
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    print srun( 'partx ' + nbd )
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    # Assume kernel is in partition 1/boot/vmlinuz*generic for now
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    part = nbd + 'p1'
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    mnt = mkdtemp()
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    srun( 'mount -o ro %s %s' % ( part, mnt  ) )
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    kernsrc = glob( '%s/boot/vmlinuz*generic' % mnt )[ 0 ]
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    initrdsrc = glob( '%s/boot/initrd*generic' % mnt )[ 0 ]
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    srun( 'cp %s %s' % ( initrdsrc, initrd ) )
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    srun( 'chmod 0444 ' + initrd )
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    srun( 'cp %s %s' % ( kernsrc, kernel ) )
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    srun( 'chmod 0444 ' + kernel )
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    srun( 'umount ' + mnt )
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    run( 'rmdir ' + mnt )
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    detachNBD( nbd )
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    return kernel, initrd
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def findBaseImage( flavor, size='8G' ):
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    "Return base VM image and kernel, creating them if needed"
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    image = path.join( VMImageDir, flavor + '-base.qcow2' )
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    if path.exists( image ):
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        # Detect race condition with multiple builds
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        perms = stat( image )[ ST_MODE ] & 0777
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        if perms != 0444:
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            raise Exception( 'Error - %s is writable ' % image +
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                            '; are multiple builds running?' )
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    else:
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        # We create VMImageDir here since we are called first
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        run( 'mkdir -p %s' % VMImageDir )
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        iso = findiso( flavor )
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        log( '* Creating image file', image )
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        run( 'qemu-img create -f qcow2 %s %s' % ( image, size ) )
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        installUbuntu( iso, image )
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        # Write-protect image, also signaling it is complete
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        log( '* Write-protecting image', image)
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        os.chmod( image, 0444 )
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    kernel, initrd = extractKernel( image, flavor )
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    log( '* Using base image', image, 'and kernel', kernel )
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    return image, kernel, initrd
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# Kickstart and Preseed files for Ubuntu/Debian installer
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#
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# Comments: this is really clunky and painful. If Ubuntu
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# gets their act together and supports kickstart a bit better
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# then we can get rid of preseed and even use this as a
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# Fedora installer as well.
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#
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# Another annoying thing about Ubuntu is that it can't just
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# install a normal system from the iso - it has to download
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# junk from the internet, making this house of cards even
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# more precarious.
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KickstartText ="""
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#Generated by Kickstart Configurator
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#platform=x86
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#System language
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lang en_US
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#Language modules to install
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langsupport en_US
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#System keyboard
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keyboard us
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#System mouse
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mouse
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#System timezone
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timezone America/Los_Angeles
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#Root password
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rootpw --disabled
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#Initial user
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user mininet --fullname "mininet" --password "mininet"
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#Use text mode install
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text
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#Install OS instead of upgrade
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install
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#Use CDROM installation media
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cdrom
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#System bootloader configuration
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bootloader --location=mbr
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#Clear the Master Boot Record
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zerombr yes
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#Partition clearing information
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clearpart --all --initlabel
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#Automatic partitioning
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autopart
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#System authorization infomation
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auth  --useshadow  --enablemd5
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#Firewall configuration
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firewall --disabled
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#Do not configure the X Window System
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skipx
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"""
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# Tell the Ubuntu/Debian installer to stop asking stupid questions
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PreseedText = """
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d-i mirror/country string manual
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d-i mirror/http/hostname string mirrors.kernel.org
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d-i mirror/http/directory string /ubuntu
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d-i mirror/http/proxy string
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d-i partman/confirm_write_new_label boolean true
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d-i partman/choose_partition select finish
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d-i partman/confirm boolean true
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d-i partman/confirm_nooverwrite boolean true
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d-i user-setup/allow-password-weak boolean true
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d-i finish-install/reboot_in_progress note
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d-i debian-installer/exit/poweroff boolean true
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"""
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def makeKickstartFloppy():
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    "Create and return kickstart floppy, kickstart, preseed"
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    kickstart = 'ks.cfg'
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    with open( kickstart, 'w' ) as f:
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        f.write( KickstartText )
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    preseed = 'ks.preseed'
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    with open( preseed, 'w' ) as f:
330
        f.write( PreseedText )
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    # Create floppy and copy files to it
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    floppy = 'ksfloppy.img'
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    run( 'qemu-img create %s 1440k' % floppy )
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    run( 'mkfs -t msdos ' + floppy )
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    run( 'mcopy -i %s %s ::/' % ( floppy, kickstart ) )
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    run( 'mcopy -i %s %s ::/' % ( floppy, preseed ) )
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    return floppy, kickstart, preseed
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def archFor( filepath ):
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    "Guess architecture for file path"
342
    name = path.basename( filepath )
343
    if 'amd64' in name or 'x86_64' in name:
344
        arch = 'x86_64'
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    # Beware of version 64 of a 32-bit OS
346
    elif 'i386' in name or '32' in name or 'x86' in name:
347
        arch = 'i386'
348
    elif '64' in name:
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        arch = 'x86_64'
350
    else:
351
        log( "Error: can't discern CPU for name", name )
352
        exit( 1 )
353
    return arch
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def installUbuntu( iso, image, logfilename='install.log' ):
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    "Install Ubuntu from iso onto image"
358
    kvm = 'qemu-system-' + archFor( iso )
359
    floppy, kickstart, preseed = makeKickstartFloppy()
360
    # Mount iso so we can use its kernel
361
    mnt = mkdtemp()
362
    srun( 'mount %s %s' % ( iso, mnt ) )
363
    kernel = path.join( mnt, 'install/vmlinuz' )
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    initrd = path.join( mnt, 'install/initrd.gz' )
365
    if NoKVM:
366
        accel = 'tcg'
367
    else:
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        accel = 'kvm'
369
    cmd = [ 'sudo', kvm,
370
           '-machine', 'accel=%s' % accel,
371
           '-nographic',
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           '-netdev', 'user,id=mnbuild',
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           '-device', 'virtio-net,netdev=mnbuild',
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           '-m', '1024',
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           '-k', 'en-us',
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           '-fda', floppy,
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           '-drive', 'file=%s,if=virtio' % image,
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           '-cdrom', iso,
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           '-kernel', kernel,
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           '-initrd', initrd,
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           '-append',
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           ' ks=floppy:/' + kickstart +
383
           ' preseed/file=floppy://' + preseed +
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           ' console=ttyS0' ]
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    ubuntuStart = time()
386
    log( '* INSTALLING UBUNTU FROM', iso, 'ONTO', image )
387
    log( ' '.join( cmd ) )
388
    log( '* logging to', abspath( logfilename ) )
389
    params = {}
390
    if not LogToConsole:
391
        logfile = open( logfilename, 'w' )
392
        params = { 'stdout': logfile, 'stderr': logfile }
393
    vm = Popen( cmd, **params )
394
    log( '* Waiting for installation to complete')
395
    vm.wait()
396
    if not LogToConsole:
397
        logfile.close()
398
    elapsed = time() - ubuntuStart
399
    # Unmount iso and clean up
400
    srun( 'umount ' + mnt )
401
    run( 'rmdir ' + mnt )
402
    if vm.returncode != 0:
403
        raise Exception( 'Ubuntu installation returned error %d' %
404
                          vm.returncode )
405
    log( '* UBUNTU INSTALLATION COMPLETED FOR', image )
406
    log( '* Ubuntu installation completed in %.2f seconds' % elapsed )
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409
def boot( cow, kernel, initrd, logfile ):
410
    """Boot qemu/kvm with a COW disk and local/user data store
411
       cow: COW disk path
412
       kernel: kernel path
413
       logfile: log file for pexpect object
414
       returns: pexpect object to qemu process"""
415
    # pexpect might not be installed until after depend() is called
416
    global pexpect
417
    import pexpect
418
    arch = archFor( kernel )
419
    log( '* Detected kernel architecture', arch )
420
    if NoKVM:
421
        accel = 'tcg'
422
    else:
423
        accel = 'kvm'
424
    cmd = [ 'sudo', 'qemu-system-' + arch,
425
            '-machine accel=%s' % accel,
426
            '-nographic',
427
            '-netdev user,id=mnbuild',
428
            '-device virtio-net,netdev=mnbuild',
429
            '-m 1024',
430
            '-k en-us',
431
            '-kernel', kernel,
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            '-initrd', initrd,
433
            '-drive file=%s,if=virtio' % cow,
434
            '-append "root=/dev/vda1 init=/sbin/init console=ttyS0" ' ]
435
    cmd = ' '.join( cmd )
436
    log( '* BOOTING VM FROM', cow )
437
    log( cmd )
438
    vm = pexpect.spawn( cmd, timeout=TIMEOUT, logfile=logfile )
439
    return vm
440

    
441

    
442
def login( vm ):
443
    "Log in to vm (pexpect object)"
444
    log( '* Waiting for login prompt' )
445
    vm.expect( 'login: ' )
446
    log( '* Logging in' )
447
    vm.sendline( 'mininet' )
448
    log( '* Waiting for password prompt' )
449
    vm.expect( 'Password: ' )
450
    log( '* Sending password' )
451
    vm.sendline( 'mininet' )
452
    log( '* Waiting for login...' )
453

    
454

    
455
def sanityTest( vm ):
456
    "Run Mininet sanity test (pingall) in vm"
457
    vm.sendline( 'sudo mn --test pingall' )
458
    if vm.expect( [ ' 0% dropped', pexpect.TIMEOUT ], timeout=45 ) == 0:
459
        log( '* Sanity check OK' )
460
    else:
461
        log( '* Sanity check FAILED' )
462
        log( '* Sanity check output:' )
463
        log( vm.before )
464

    
465

    
466
def coreTest( vm, prompt=Prompt ):
467
    "Run core tests (make test) in VM"
468
    log( '* Making sure cgroups are mounted' )
469
    vm.sendline( 'sudo service cgroup-lite restart' )
470
    vm.expect( prompt )
471
    vm.sendline( 'sudo cgroups-mount' )
472
    vm.expect( prompt )
473
    log( '* Running make test' )
474
    vm.sendline( 'cd ~/mininet; sudo make test' )
475
    # We should change "make test" to report the number of
476
    # successful and failed tests. For now, we have to
477
    # know the time for each test, which means that this
478
    # script will have to change as we add more tests.
479
    for test in range( 0, 2 ):
480
        if vm.expect( [ 'OK', 'FAILED', pexpect.TIMEOUT ], timeout=180 ) == 0:
481
            log( '* Test', test, 'OK' )
482
        else:
483
            log( '* Test', test, 'FAILED' )
484
            log( '* Test', test, 'output:' )
485
            log( vm.before )
486

    
487
def examplesquickTest( vm, prompt=Prompt ):
488
    "Quick test of mininet examples"
489
    vm.sendline( 'sudo apt-get install python-pexpect' )
490
    vm.expect( prompt )
491
    vm.sendline( 'sudo python ~/mininet/examples/test/runner.py -v -quick' )
492

    
493

    
494
def examplesfullTest( vm, prompt=Prompt ):
495
    "Full (slow) test of mininet examples"
496
    vm.sendline( 'sudo apt-get install python-pexpect' )
497
    vm.expect( prompt )
498
    vm.sendline( 'sudo python ~/mininet/examples/test/runner.py -v' )
499

    
500

    
501
def walkthroughTest( vm, prompt=Prompt ):
502
    "Test mininet walkthrough"
503
    vm.sendline( 'sudo apt-get install python-pexpect' )
504
    vm.expect( prompt )
505
    vm.sendline( 'sudo python ~/mininet/test/test_walkthrough.py -v' )
506

    
507

    
508
def checkOutBranch( vm, branch, prompt=Prompt ):
509
    vm.sendline( 'cd ~/mininet; git fetch; git pull --rebase; git checkout '
510
                 + branch )
511
    vm.expect( prompt )
512
    vm.sendline( 'sudo make install' )
513

    
514

    
515
def interact( vm, prompt=Prompt ):
516
    "Interact with vm, which is a pexpect object"
517
    login( vm )
518
    log( '* Waiting for login...' )
519
    vm.expect( prompt )
520
    log( '* Sending hostname command' )
521
    vm.sendline( 'hostname' )
522
    log( '* Waiting for output' )
523
    vm.expect( prompt )
524
    log( '* Fetching Mininet VM install script' )
525
    vm.sendline( 'wget '
526
                 'https://raw.github.com/mininet/mininet/master/util/vm/'
527
                 'install-mininet-vm.sh' )
528
    vm.expect( prompt )
529
    log( '* Running VM install script' )
530
    vm.sendline( 'bash install-mininet-vm.sh' )
531
    vm.expect ( 'password for mininet: ' )
532
    vm.sendline( 'mininet' )
533
    log( '* Waiting for script to complete... ' )
534
    # Gigantic timeout for now ;-(
535
    vm.expect( 'Done preparing Mininet', timeout=3600 )
536
    log( '* Completed successfully' )
537
    vm.expect( prompt )
538
    version = getMininetVersion( vm )
539
    vm.expect( prompt )
540
    log( '* Mininet version: ', version )
541
    log( '* Testing Mininet' )
542
    runTests( vm )
543
    log( '* Shutting down' )
544
    vm.sendline( 'sync; sudo shutdown -h now' )
545
    log( '* Waiting for EOF/shutdown' )
546
    vm.read()
547
    log( '* Interaction complete' )
548
    return version
549

    
550

    
551
def cleanup():
552
    "Clean up leftover qemu-nbd processes and other junk"
553
    call( [ 'sudo', 'pkill', '-9', 'qemu-nbd' ] )
554

    
555

    
556
def convert( cow, basename ):
557
    """Convert a qcow2 disk to a vmdk and put it a new directory
558
       basename: base name for output vmdk file"""
559
    vmdk = basename + '.vmdk'
560
    log( '* Converting qcow2 to vmdk' )
561
    run( 'qemu-img convert -f qcow2 -O vmdk %s %s' % ( cow, vmdk ) )
562
    return vmdk
563

    
564

    
565
# Template for OVF - a very verbose format!
566
# In the best of all possible worlds, we might use an XML
567
# library to generate this, but a template is easier and
568
# possibly more concise!
569
# Warning: XML file cannot begin with a newline!
570

    
571
OVFTemplate = """<?xml version="1.0"?>
572
<Envelope ovf:version="1.0" xml:lang="en-US"
573
    xmlns="http://schemas.dmtf.org/ovf/envelope/1"
574
    xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1"
575
    xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData"
576
    xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData"
577
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
578
<References>
579
<File ovf:href="%s" ovf:id="file1" ovf:size="%d"/>
580
</References>
581
<DiskSection>
582
<Info>Virtual disk information</Info>
583
<Disk ovf:capacity="%d" ovf:capacityAllocationUnits="byte" 
584
    ovf:diskId="vmdisk1" ovf:fileRef="file1" 
585
    ovf:format="http://www.vmware.com/interfaces/specifications/vmdk.html"/>
586
</DiskSection>
587
<NetworkSection>
588
<Info>The list of logical networks</Info>
589
<Network ovf:name="nat">
590
<Description>The nat  network</Description>
591
</Network>
592
</NetworkSection>
593
<VirtualSystem ovf:id="Mininet-VM">
594
<Info>A Mininet Virtual Machine (%s)</Info>
595
<Name>mininet-vm</Name>
596
<VirtualHardwareSection>
597
<Info>Virtual hardware requirements</Info>
598
<Item>
599
<rasd:AllocationUnits>hertz * 10^6</rasd:AllocationUnits>
600
<rasd:Description>Number of Virtual CPUs</rasd:Description>
601
<rasd:ElementName>1 virtual CPU(s)</rasd:ElementName>
602
<rasd:InstanceID>1</rasd:InstanceID>
603
<rasd:ResourceType>3</rasd:ResourceType>
604
<rasd:VirtualQuantity>1</rasd:VirtualQuantity>
605
</Item>
606
<Item>
607
<rasd:AllocationUnits>byte * 2^20</rasd:AllocationUnits>
608
<rasd:Description>Memory Size</rasd:Description>
609
<rasd:ElementName>%dMB of memory</rasd:ElementName>
610
<rasd:InstanceID>2</rasd:InstanceID>
611
<rasd:ResourceType>4</rasd:ResourceType>
612
<rasd:VirtualQuantity>%d</rasd:VirtualQuantity>
613
</Item>
614
<Item>
615
<rasd:Address>0</rasd:Address>
616
<rasd:Caption>scsiController0</rasd:Caption>
617
<rasd:Description>SCSI Controller</rasd:Description>
618
<rasd:ElementName>scsiController0</rasd:ElementName>
619
<rasd:InstanceID>4</rasd:InstanceID>
620
<rasd:ResourceSubType>lsilogic</rasd:ResourceSubType>
621
<rasd:ResourceType>6</rasd:ResourceType>
622
</Item>
623
<Item>
624
<rasd:AddressOnParent>0</rasd:AddressOnParent>
625
<rasd:ElementName>disk1</rasd:ElementName>
626
<rasd:HostResource>ovf:/disk/vmdisk1</rasd:HostResource>
627
<rasd:InstanceID>11</rasd:InstanceID>
628
<rasd:Parent>4</rasd:Parent>
629
<rasd:ResourceType>17</rasd:ResourceType>
630
</Item>
631
<Item>
632
<rasd:AddressOnParent>2</rasd:AddressOnParent>
633
<rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>
634
<rasd:Connection>nat</rasd:Connection>
635
<rasd:Description>E1000 ethernet adapter on nat</rasd:Description>
636
<rasd:ElementName>ethernet0</rasd:ElementName>
637
<rasd:InstanceID>12</rasd:InstanceID>
638
<rasd:ResourceSubType>E1000</rasd:ResourceSubType>
639
<rasd:ResourceType>10</rasd:ResourceType>
640
</Item>
641
<Item>
642
<rasd:Address>0</rasd:Address>
643
<rasd:Caption>usb</rasd:Caption>
644
<rasd:Description>USB Controller</rasd:Description>
645
<rasd:ElementName>usb</rasd:ElementName>
646
<rasd:InstanceID>9</rasd:InstanceID>
647
<rasd:ResourceType>23</rasd:ResourceType>
648
</Item>
649
</VirtualHardwareSection>
650
</VirtualSystem>
651
</Envelope>
652
"""
653

    
654

    
655
def generateOVF( name, diskname, disksize, mem=1024 ):
656
    """Generate (and return) OVF file "name.ovf"
657
       name: root name of OVF file to generate
658
       diskname: name of disk file
659
       disksize: size of virtual disk in bytes
660
       mem: VM memory size in MB"""
661
    ovf = name + '.ovf'
662
    filesize = stat( diskname )[ ST_SIZE ]
663
    # OVFTemplate uses the memory size twice in a row
664
    xmltext = OVFTemplate % ( diskname, filesize, disksize, name, mem, mem )
665
    with open( ovf, 'w+' ) as f:
666
        f.write( xmltext )
667
    return ovf
668

    
669

    
670
def qcow2size( qcow2 ):
671
    "Return virtual disk size (in bytes) of qcow2 image"
672
    output = check_output( [ 'file', qcow2 ] )
673
    assert 'QCOW' in output
674
    bytes = int( re.findall( '(\d+) bytes', output )[ 0 ] )
675
    return bytes
676

    
677

    
678
def build( flavor='raring32server' ):
679
    "Build a Mininet VM; return vmdk and vdisk size"
680
    global LogFile, Zip
681
    start = time()
682
    date = strftime( '%y%m%d-%H-%M-%S', localtime())
683
    dir = 'mn-%s-%s' % ( flavor, date )
684
    try:
685
        os.mkdir( dir )
686
    except:
687
        raise Exception( "Failed to create build directory %s" % dir )
688
    os.chdir( dir )
689
    LogFile = open( 'build.log', 'w' )
690
    log( '* Logging to', abspath( LogFile.name ) )
691
    log( '* Created working directory', dir )
692
    image, kernel, initrd = findBaseImage( flavor )
693
    basename = 'mininet-' + flavor
694
    volume = basename + '.qcow2'
695
    run( 'qemu-img create -f qcow2 -b %s %s' % ( image, volume ) )
696
    log( '* VM image for', flavor, 'created as', volume )
697
    if LogToConsole:
698
        logfile = stdout
699
    else:
700
        logfile = open( flavor + '.log', 'w+' )
701
    log( '* Logging results to', abspath( logfile.name ) )
702
    vm = boot( volume, kernel, initrd, logfile )
703
    version = interact( vm )
704
    size = qcow2size( volume )
705
    vmdk = convert( volume, basename='mininet-vm-' + archFor( flavor ) )
706
    if not SaveQCOW2:
707
        log( '* Removing qcow2 volume', volume )
708
        os.remove( volume )
709
    log( '* Converted VM image stored as', abspath( vmdk ) )
710
    ovfname = 'mininet-%s-%s' % ( version, OSVersion( flavor ) )
711
    ovf = generateOVF( diskname=vmdk, disksize=size, name=ovfname )
712
    log( '* Generated OVF descriptor file', ovf )
713
    if Zip:
714
        log( '* Generating .zip file' )
715
        run( 'zip %s-ovf.zip %s %s' % ( ovfname, ovf, vmdk ) )
716
    end = time()
717
    elapsed = end - start
718
    log( '* Results logged to', abspath( logfile.name ) )
719
    log( '* Completed in %.2f seconds' % elapsed )
720
    log( '* %s VM build DONE!!!!! :D' % flavor )
721
    os.chdir( '..' )
722

    
723

    
724
def runTests( vm, tests=None, prompt=Prompt ):
725
    "Run tests (list) in vm (pexpect object)"
726
    if not tests:
727
        tests = [ 'sanity', 'core' ]
728
    testfns = testDict()
729
    for test in tests:
730
        if test not in testfns:
731
            raise Exception( 'Unknown test: ' + test )
732
        log( '* Running test', test )
733
        fn = testfns[ test ]
734
        fn( vm )
735
        vm.expect( prompt )
736

    
737

    
738
def getMininetVersion( vm ):
739
    "Run mn to find Mininet version in VM"
740
    vm.sendline( '~/mininet/bin/mn --version' )
741
    # Eat command line echo, then read output line
742
    vm.readline()
743
    version = vm.readline().strip()
744
    return version
745

    
746

    
747
def bootAndRunTests( image, tests=None ):
748
    """Boot and test VM
749
       tests: list of tests (default: sanity, core)"""
750
    bootTestStart = time()
751
    basename = path.basename( image )
752
    image = abspath( image )
753
    tmpdir = mkdtemp( prefix='test-' + basename )
754
    log( '* Using tmpdir', tmpdir )
755
    cow = path.join( tmpdir, basename + '.qcow2' )
756
    log( '* Creating COW disk', cow )
757
    run( 'qemu-img create -f qcow2 -b %s %s' % ( image, cow ) )
758
    log( '* Extracting kernel and initrd' )
759
    kernel, initrd = extractKernel( image, flavor=basename, imageDir=tmpdir )
760
    if LogToConsole:
761
        logfile = stdout
762
    else:
763
        logfile = NamedTemporaryFile( prefix=basename,
764
                                      suffix='.testlog', delete=False )
765
    log( '* Logging VM output to', logfile.name )
766
    vm = boot( cow=cow, kernel=kernel, initrd=initrd, logfile=logfile )
767
    prompt = '\$ '
768
    login( vm )
769
    log( '* Waiting for prompt after login' )
770
    vm.expect( prompt )
771
    if Branch:
772
        checkOutBranch( vm, branch=Branch )
773
        vm.expect( prompt )
774
    vm.expect( prompt )
775
    log( '* Running tests' )
776
    runTests( vm, tests=tests )
777
    # runTests eats its last prompt, but maybe it shouldn't...
778
    log( '* Shutting down' )
779
    vm.sendline( 'sudo shutdown -h now ' )
780
    log( '* Waiting for shutdown' )
781
    vm.wait()
782
    log( '* Removing temporary dir', tmpdir )
783
    srun( 'rm -rf ' + tmpdir )
784
    elapsed = time() - bootTestStart
785
    log( '* Boot and test completed in %.2f seconds' % elapsed )
786

    
787

    
788
def buildFlavorString():
789
    "Return string listing valid build flavors"
790
    return 'valid build flavors: ( %s )' % ' '.join( sorted( isoURLs ) )
791

    
792

    
793
def testDict():
794
    "Return dict of tests in this module"
795
    suffix = 'Test'
796
    trim = len( suffix )
797
    fdict = dict( [ ( fname[ : -trim ], f ) for fname, f in
798
                    inspect.getmembers( modules[ __name__ ],
799
                                    inspect.isfunction )
800
                  if fname.endswith( suffix ) ] )
801
    return fdict
802

    
803

    
804
def testString():
805
    "Return string listing valid tests"
806
    return 'valid tests: ( %s )' % ' '.join( testDict().keys() )
807

    
808

    
809
def parseArgs():
810
    "Parse command line arguments and run"
811
    global LogToConsole, NoKVM, Branch, Zip
812
    parser = argparse.ArgumentParser( description='Mininet VM build script',
813
                                      epilog=buildFlavorString() + ' ' +
814
                                      testString() )
815
    parser.add_argument( '-v', '--verbose', action='store_true',
816
                        help='send VM output to console rather than log file' )
817
    parser.add_argument( '-d', '--depend', action='store_true',
818
                         help='install dependencies for this script' )
819
    parser.add_argument( '-l', '--list', action='store_true',
820
                         help='list valid build flavors and tests' )
821
    parser.add_argument( '-c', '--clean', action='store_true',
822
                         help='clean up leftover build junk (e.g. qemu-nbd)' )
823
    parser.add_argument( '-q', '--qcow2', action='store_true',
824
                         help='save qcow2 image rather than deleting it' )
825
    parser.add_argument( '-n', '--nokvm', action='store_true',
826
                         help="Don't use kvm - use tcg emulation instead" )
827
    parser.add_argument( '-i', '--image', metavar='image', default=[],
828
                         action='append',
829
                         help='Boot and test an existing VM image' )
830
    parser.add_argument( '-t', '--test', metavar='test', default=[],
831
                        action='append',
832
                        help='specify a test to run' )
833
    parser.add_argument( '-b', '--branch', metavar='branch',
834
                         help='For an existing VM image, check out and install'
835
                         ' this branch before testing' )
836
    parser.add_argument( 'flavor', nargs='*',
837
                         help='VM flavor(s) to build (e.g. raring32server)' )
838
    parser.add_argument( '-z', '--zip', action='store_true',
839
                        help='archive .ovf and .vmdk into .zip file' )
840
    args = parser.parse_args()
841
    if args.depend:
842
        depend()
843
    if args.list:
844
        print buildFlavorString()
845
    if args.clean:
846
        cleanup()
847
    if args.verbose:
848
        LogToConsole = True
849
    if args.nokvm:
850
        NoKVM = True
851
    if args.branch:
852
        Branch = args.branch
853
    if args.zip:
854
        Zip = True
855
    for flavor in args.flavor:
856
        if flavor not in isoURLs:
857
            print "Unknown build flavor:", flavor
858
            print buildFlavorString()
859
            break
860
        try:
861
            build( flavor )
862
        except Exception as e:
863
            log( '* BUILD FAILED with exception: ', e )
864
            exit( 1 )
865
    for image in args.image:
866
        bootAndRunTests( image, tests=args.test )
867
    if not ( args.depend or args.list or args.clean or args.flavor
868
             or args.image ):
869
        parser.print_help()
870

    
871

    
872
if __name__ == '__main__':
873
    parseArgs()