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#!/usr/bin/python
"""
Copyright (C) International Business Machines Corp., 2005
Author: Dan Smith <danms@us.ibm.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; under version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
import sys
import commands
import os
import re
import time
from Xm import *
from Test import *
from config import *
BLOCK_ROOT_DEV = "hda"
def getDeviceModel():
"""Get the path to the device model based on
the architecture reported in uname"""
arch = os.uname()[4]
if re.search("64", arch):
return "/usr/lib64/xen/bin/qemu-dm"
else:
return "/usr/lib/xen/bin/qemu-dm"
def getDefaultKernel():
"""Get the path to the default DomU kernel"""
dom0Ver = commands.getoutput("uname -r");
domUVer = dom0Ver.replace("xen0", "xenU");
return "/boot/vmlinuz-" + domUVer;
def getUniqueName():
"""Get a uniqueish name for use in a domain"""
unixtime = int(time.time())
test_name = sys.argv[0]
test_name = re.sub("\.test", "", test_name)
test_name = re.sub("[\/\.]", "", test_name)
name = "%s-%i" % (test_name, unixtime)
return name
def getRdPath():
rdpath = os.environ.get("RD_PATH")
if not rdpath:
rdpath = "../../ramdisk"
rdpath = os.path.abspath(rdpath)
return rdpath
ParavirtDefaults = {"memory" : 64,
"vcpus" : 1,
"kernel" : getDefaultKernel(),
"root" : "/dev/ram0",
"ramdisk" : getRdPath() + "/initrd.img"
}
VmxDefaults = {"memory" : 64,
"vcpus" : 1,
"acpi" : 0,
"apic" : 0,
"disk" : ["file:%s/disk.img,ioemu:%s,w" %
(getRdPath(), BLOCK_ROOT_DEV)],
"kernel" : "/usr/lib/xen/boot/vmxloader",
"builder" : "vmx",
"sdl" : 0,
"vnc" : 0,
"vncviewer" : 0,
"nographic" : 1,
"serial" : "pty",
"device_model" : getDeviceModel()
}
if ENABLE_VMX_SUPPORT:
configDefaults = VmxDefaults
else:
configDefaults = ParavirtDefaults
class XenConfig:
"""An object to help create a xen-compliant config file"""
def __init__(self):
self.defaultOpts = {}
# These options need to be lists
self.defaultOpts["disk"] = []
self.defaultOpts["vif"] = []
self.opts = self.defaultOpts
def toString(self):
"""Convert this config to a string for writing out
to a file"""
string = "# Xen configuration generated by xm-test\n"
for k, v in self.opts.items():
if isinstance(v, int):
piece = "%s = %i" % (k, v)
elif isinstance(v, list) and v:
piece = "%s = %s" % (k, v)
elif isinstance(v, str) and v:
piece = "%s = \"%s\"" % (k, v)
else:
piece = None
if piece:
string += "%s\n" % piece
return string
def write(self, filename):
"""Write this config out to filename"""
output = file(filename, "w")
output.write(self.toString())
output.close()
def __str__(self):
"""When used as a string, we represent ourself by a config
filename, which points to a temporary config that we write
out ahead of time"""
filename = "/tmp/xm-test.conf"
self.write(filename)
return filename
def setOpt(self, name, value):
"""Set an option in the config"""
if name in self.opts.keys() and isinstance(self.opts[name], list) and not isinstance(value, list):
self.opts[name] = [value]
else:
self.opts[name] = value
def appOpt(self, name, value):
"""Append a value to a list option"""
if name in self.opts.keys() and isinstance(self.opts[name], list):
self.opts[name].append(value)
def getOpt(self, name):
"""Return the value of a config option"""
if name in self.opts.keys():
return self.opts[name]
else:
return None
def setOpts(self, opts):
"""Batch-set options from a dictionary"""
for k, v in opts.items():
self.setOpt(k, v)
def clearOpts(self, name=None):
"""Clear one or all config options"""
if name:
self.opts[name] = self.defaultOpts[name]
else:
self.opts = self.defaultOpts
class DomainError(Exception):
def __init__(self, msg, extra="", errorcode=0):
self.msg = msg
self.extra = extra
try:
self.errorcode = int(errorcode)
except Exception, e:
self.errorcode = -1
def __str__(self):
return str(self.msg)
class XenDomain:
def __init__(self, name=None, config=None):
"""Create a domain object.
@param config: String filename of config file
"""
if name:
self.name = name
else:
self.name = getUniqueName()
self.config = config
def start(self):
ret, output = traceCommand("xm create %s" % self.config)
if ret != 0:
raise DomainError("Failed to create domain",
extra=output,
errorcode=ret)
def stop(self):
prog = "xm"
cmd = " shutdown "
ret, output = traceCommand(prog + cmd + self.config.getOpt("name"))
return ret
def destroy(self):
prog = "xm"
cmd = " destroy "
ret, output = traceCommand(prog + cmd + self.config.getOpt("name"))
return ret
def getName(self):
return self.name
def getId(self):
return domid(self.getName());
class XmTestDomain(XenDomain):
def __init__(self, name=None, extraConfig=None, baseConfig=configDefaults):
"""Create a new xm-test domain
@param name: The requested domain name
@param extraConfig: Additional configuration options
@param baseConfig: The initial configuration defaults to use
"""
config = XenConfig()
config.setOpts(baseConfig)
if extraConfig:
config.setOpts(extraConfig)
if name:
config.setOpt("name", name)
elif not config.getOpt("name"):
config.setOpt("name", getUniqueName())
XenDomain.__init__(self, config.getOpt("name"), config=config)
def start(self):
XenDomain.start(self)
if ENABLE_VMX_SUPPORT:
waitForBoot()
def startNow(self):
XenDomain.start(self)
def minSafeMem(self):
return 16
if __name__ == "__main__":
c = XenConfig()
c.setOpt("foo", "bar")
c.setOpt("foob", 1)
opts = {"opt1" : 19,
"opt2" : "blah"}
c.setOpts(opts)
c.setOpt("disk", "phy:/dev/ram0,hda1,w")
c.appOpt("disk", "phy:/dev/ram1,hdb1,w")
print str(c)
# c.write("/tmp/foo.conf")
# d = XmTestDomain();
#
# d.start();
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