class TangoServer:
""" TangoServer - Implements the API functions that the server accepts
"""
def __init__(self):
self.daemon = True
# init logging early, or some logging will be lost
logging.basicConfig(
filename=Config.LOGFILE,
format="%(levelname)s|%(asctime)s|%(name)s|%(message)s",
level=Config.LOGLEVEL,
)
vmms = None
if Config.VMMS_NAME == "tashiSSH":
from vmms.tashiSSH import TashiSSH
vmms = TashiSSH()
elif Config.VMMS_NAME == "ec2SSH":
from vmms.ec2SSH import Ec2SSH
vmms = Ec2SSH()
elif Config.VMMS_NAME == "localDocker":
from vmms.localDocker import LocalDocker
vmms = LocalDocker()
elif Config.VMMS_NAME == "distDocker":
from vmms.distDocker import DistDocker
vmms = DistDocker()
self.preallocator = Preallocator({Config.VMMS_NAME: vmms})
self.jobQueue = JobQueue(self.preallocator)
if not Config.USE_REDIS:
# creates a local Job Manager if there is no persistent
# memory between processes. Otherwise, JobManager will
# be initiated separately
JobManager(self.jobQueue).start()
self.start_time = time.time()
self.log = logging.getLogger("TangoServer")
self.log.info("Starting Tango server")
def addJob(self, job):
""" addJob - Add a job to the job queue
"""
Config.job_requests += 1
self.log.debug("Received addJob request")
ret = self.__validateJob(job, self.preallocator.vmms)
self.log.info("Done validating job %s" % (job.name))
if ret == 0:
return self.jobQueue.add(job)
else:
self.jobQueue.addDead(job)
return -1
def delJob(self, id, deadjob):
""" delJob - Delete a job
@param id: Id of job to delete
@param deadjob - If 0, move the job from the live queue to the
dead queue. If non-zero, remove the job from the dead queue
and discard. Use with caution!
"""
self.log.debug("Received delJob(%d, %d) request" % (id, deadjob))
return self.jobQueue.delJob(id, deadjob)
def cancelJobWithPath(self, outFilePath):
""" cancelJobWithPath - when this function returns, one of the following
is true:
1. The job with the specified output file does not exist
2. the job with the specified output file has finished running normally
3. The job with the specified output file has been cancelled
4. The job was found, and it's running, but cancellation failed.
In case 1, NOT_FOUND is returned.
2, ALREADY_COMPLETED is returned.
3, SUCCEEDED is returned.
4, FAILED is returned.
"""
self.log.debug("Received cancelJobWithPath(%s) request" %
(outFilePath))
id, job, job_status = self.jobQueue.findRemovingWaiting(outFilePath)
self.log.debug("cancelJobWithPath: Found a job %s with status %s" %
(job, job_status))
if job_status == JobQueue.JobStatus.NOT_FOUND:
return CancellationStatus.NOT_FOUND
elif job_status == JobQueue.JobStatus.DEAD:
return CancellationStatus.ALREADY_COMPLETED
elif job_status == JobQueue.JobStatus.RUNNING:
return self.killUntilJobComplete(id, job)
else:
assert job_status == JobQueue.JobStatus.WAITING
# In this case, findRemovingLive has moved the live job to the dead
# queue, and we have nothing to worry about.
# Let's notify autolab that the job is done.
if job.notifyURL:
outputFileName = job.outputFile.split("/")[
-1] # get filename from path
files = {
'file': unicode('Job was cancelled before it started.')
}
hdrs = {'Filename': outputFileName}
self.log.debug("Sending request to %s" % job.notifyURL)
def worker():
requests.post(job.notifyURL,
files=files,
headers=hdrs,
data={'runningTimeSeconds': 0},
verify=False)
threading.Thread(target=worker).start()
return CancellationStatus.SUCCEEDED
def killUntilJobComplete(self, id, job):
""" Here's the contract:
If the job is currently running (i.e. it could complete at some point
in the future), then this method will return only when the job is
complete. It tries to help by repeatedly `pkill`ing the process. But
a compliant implementation could just block until the job completes
on its own.
On success, returns SUCCEEDED;
on failure, return FAILED (compliant w above method)
"""
self.log.debug("Received killUntilJobComplete request")
vm = job.vm
for _ in xrange(0, Config.CANCEL_RETRIES):
# Returns 0 on success.
if self.preallocator.vmms[vm.vmms].kill(vm) == 0:
return CancellationStatus.SUCCEEDED
return CancellationStatus.FAILED
def getJobs(self, item):
""" getJobs - Return the list of live jobs (item == 0) or the
list of dead jobs (item == -1).
^ You gotta be kidding me. Is this an API for number lovers.
"""
try:
self.log.debug("Received getJobs(%s) request" % (item))
if item == -1: # return the list of dead jobs
return self.jobQueue.deadJobs.values()
elif item == 0: # return the list of live jobs
return self.jobQueue.liveJobs.values()
else: # invalid parameter
return []
except Exception as e:
self.log.debug("getJobs: %s" % str(e))
def preallocVM(self, vm, num):
""" preallocVM - Set the pool size for VMs of type vm to num
"""
self.log.debug("Received preallocVM(%s,%d)request" % (vm.name, num))
try:
vmms = self.preallocator.vmms[vm.vmms]
if not vm or num < 0:
return -2
if not vmms.isValidImage(vm.image):
self.log.error("Invalid image name")
return -3
(name, ext) = os.path.splitext(vm.image)
vm.name = name
self.preallocator.update(vm, num)
return 0
except Exception as err:
self.log.error("preallocVM failed: %s" % err)
return -1
def getVMs(self, vmms_name):
""" getVMs - return the list of VMs managed by the service vmms_name
"""
self.log.debug("Received getVMs request(%s)" % vmms_name)
try:
if vmms_name in self.preallocator.vmms:
vmms_inst = self.preallocator.vmms[vmms_name]
return vmms_inst.getVMs()
else:
return []
except Exception as err:
self.log.error("getVMs request failed: %s" % err)
return []
def delVM(self, vmName, id):
""" delVM - delete a specific VM instance from a pool
"""
self.log.debug("Received delVM request(%s, %d)" % (vmName, id))
try:
if not vmName or vmName == "" or not id:
return -1
return self.preallocator.destroyVM(vmName, id)
except Exception as err:
self.log.error("delVM request failed: %s" % err)
return -1
def getPool(self, vmName):
""" getPool - Return the current members of a pool and its free list
"""
self.log.debug("Received getPool request(%s)" % (vmName))
try:
if not vmName or vmName == "":
return []
result = self.preallocator.getPool(vmName)
return [
"pool_size=%d" % len(result["pool"]),
"free_size=%d" % len(result["free"]),
"pool=%s" % result["pool"],
"free=%s" % result["free"]
]
except Exception as err:
self.log.error("getPool request failed: %s" % err)
return []
def getInfo(self):
""" getInfo - return various statistics about the Tango daemon
"""
stats = {}
stats['elapsed_secs'] = time.time() - self.start_time
stats['job_requests'] = Config.job_requests
stats['job_retries'] = Config.job_retries
stats['waitvm_timeouts'] = Config.waitvm_timeouts
stats['runjob_timeouts'] = Config.runjob_timeouts
stats['copyin_errors'] = Config.copyin_errors
stats['runjob_errors'] = Config.runjob_errors
stats['copyout_errors'] = Config.copyout_errors
stats['num_threads'] = threading.activeCount()
return stats
def setScaleParams(self, low_water_mark, max_pool_size):
self.preallocator.low_water_mark.set(low_water_mark)
self.jobQueue.max_pool_size.set(max_pool_size)
return 0
def runningTimeForOutputFile(self, outputFile):
self.log.debug("Received runningTimeForOutputFile(%s)" % outputFile)
liveJobTuple = self.jobQueue.liveJobs.getWrapped(outputFile)
if liveJobTuple:
(_, liveJob) = liveJobTuple
self.log.debug(str(liveJob.startTime))
return liveJob.runningTime()
return None
#
# Helper functions
#
# NOTE: This function should be called by ONLY jobManager. The rest servers
# shouldn't call this function.
def resetTango(self, vmms):
""" resetTango - resets Tango to a clean predictable state and
ensures that it has a working virtualization environment. A side
effect is that also checks that each supported VMMS is actually
running.
"""
# There are two cases this function is called: 1. Tango has a fresh start.
# Then we want to destroy all instances in Tango's name space. 2. Job
# Manager is restarted after a previous crash. Then we want to destroy
# the "busy" instances prior to the crash and leave the "free" onces intact.
self.log.debug("Received resetTango request.")
try:
# For each supported VMM system, get the instances it knows about
# in the current Tango name space and kill those not in free pools.
for vmms_name in vmms:
vobj = vmms[vmms_name]
# Round up all instances in the free pools.
allFreeVMs = []
for key in self.preallocator.machines.keys():
freePool = self.preallocator.getPool(key)["free"]
for vmId in freePool:
vmName = vobj.instanceName(vmId, key)
allFreeVMs.append(vmName)
self.log.info("vms in all free pools: %s" % allFreeVMs)
# For each in Tango's name space, destroy the onces in free pool.
# AND remove it from Tango's internal bookkeeping.
vms = vobj.getVMs()
self.log.debug("Pre-existing VMs: %s" %
[vm.name for vm in vms])
destroyedList = []
removedList = []
for vm in vms:
if re.match("%s-" % Config.PREFIX, vm.name):
# Todo: should have an one-call interface to destroy the
# machine AND to keep the interval data consistent.
if vm.name not in allFreeVMs:
destroyedList.append(vm.name)
vobj.destroyVM(vm)
# also remove it from "total" set of the pool
(prefix, vmId, poolName) = vm.name.split("-")
machine = self.preallocator.machines.get(poolName)
if not machine: # the pool may not exist
continue
if int(vmId) in machine[0]:
removedList.append(vm.name)
machine[0].remove(int(vmId))
self.preallocator.machines.set(poolName, machine)
if destroyedList:
self.log.warning("Killed these %s VMs on restart: %s" %
(vmms_name, destroyedList))
if removedList:
self.log.warning("Removed these %s VMs from their pools" %
(removedList))
for _, job in self.jobQueue.liveJobs.iteritems():
if not job.isNotAssigned():
job.makeUnassigned()
self.log.debug("job: %s, assigned: %s" %
(str(job.name), str(job.assigned)))
except Exception as err:
self.log.error("resetTango: Call to VMMS %s failed: %s" %
(vmms_name, err))
os._exit(1)
def __validateJob(self, job, vmms):
""" validateJob - validate the input arguments in an addJob request.
"""
errors = 0
# If this isn't a Tango job then bail with an error
if (not isinstance(job, TangoJob)):
return -1
# Every job must have a name
if not job.name:
self.log.error("validateJob: Missing job.name")
job.appendTrace("validateJob: Missing job.name")
errors += 1
# Check the virtual machine field
if not job.vm:
self.log.error("validateJob: Missing job.vm")
job.appendTrace("validateJob: Missing job.vm")
errors += 1
else:
if not job.vm.image:
self.log.error("validateJob: Missing job.vm.image")
job.appendTrace("validateJob: Missing job.vm.image")
errors += 1
else:
vobj = vmms[Config.VMMS_NAME]
if not vobj.isValidImage(job.vm.image):
self.log.error("validateJob: Image not found: %s" %
job.vm.image)
job.appendTrace("validateJob: Image not found: %s" %
job.vm.image)
errors += 1
else:
(name, ext) = os.path.splitext(job.vm.image)
job.vm.name = name
if not job.vm.vmms:
self.log.error("validateJob: Missing job.vm.vmms")
job.appendTrace("validateJob: Missing job.vm.vmms")
errors += 1
else:
if job.vm.vmms not in vmms:
self.log.error("validateJob: Invalid vmms name: %s" %
job.vm.vmms)
job.appendTrace("validateJob: Invalid vmms name: %s" %
job.vm.vmms)
errors += 1
# Check the output file
if not job.outputFile:
self.log.error("validateJob: Missing job.outputFile")
job.appendTrace("validateJob: Missing job.outputFile")
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s" %
job.outputFile)
job.appendTrace("validateJob: Bad output path: %s" %
job.outputFile)
errors += 1
# Check for max output file size parameter
if not job.maxOutputFileSize:
self.log.debug(
"validateJob: Setting job.maxOutputFileSize "
"to default value: %d bytes", Config.MAX_OUTPUT_FILE_SIZE)
job.maxOutputFileSize = Config.MAX_OUTPUT_FILE_SIZE
# Check the list of input files
hasMakefile = False
for inputFile in job.input:
if not inputFile.localFile:
self.log.error("validateJob: Missing inputFile.localFile")
job.appendTrace("validateJob: Missing inputFile.localFile")
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s" %
job.outputFile)
job.appendTrace("validateJob: Bad output path: %s" %
job.outputFile)
errors += 1
if inputFile.destFile == 'Makefile':
hasMakefile = True
# Check if input files include a Makefile
if not hasMakefile:
self.log.error("validateJob: Missing Makefile in input files.")
job.appendTrace("validateJob: Missing Makefile in input files.")
errors += 1
# Check if job timeout has been set; If not set timeout to default
if not job.timeout or job.timeout <= 0:
self.log.debug(
"validateJob: Setting job.timeout to"
" default config value: %d secs", Config.RUNJOB_TIMEOUT)
job.timeout = Config.RUNJOB_TIMEOUT
# Any problems, return an error status
if errors > 0:
self.log.error("validateJob: Job rejected: %d errors" % errors)
job.appendTrace("validateJob: Job rejected: %d errors" % errors)
return -1
else:
return 0
class TangoServer:
""" TangoServer - Implements the API functions that the server accepts
"""
def __init__(self):
self.daemon = True
vmms = None
if Config.VMMS_NAME == "tashiSSH":
from vmms.tashiSSH import TashiSSH
vmms = TashiSSH()
elif Config.VMMS_NAME == "ec2SSH":
from vmms.ec2SSH import Ec2SSH
vmms = Ec2SSH()
elif Config.VMMS_NAME == "localDocker":
from vmms.localDocker import LocalDocker
vmms = LocalDocker()
elif Config.VMMS_NAME == "distDocker":
from vmms.distDocker import DistDocker
vmms = DistDocker()
self.preallocator = Preallocator({Config.VMMS_NAME: vmms})
self.jobQueue = JobQueue(self.preallocator)
if not Config.USE_REDIS:
# creates a local Job Manager if there is no persistent
# memory between processes. Otherwise, JobManager will
# be initiated separately
JobManager(self.jobQueue).start()
logging.basicConfig(
filename=Config.LOGFILE,
format="%(levelname)s|%(asctime)s|%(name)s|%(message)s",
level=Config.LOGLEVEL,
)
self.start_time = time.time()
self.log = logging.getLogger("TangoServer")
self.log.info("Starting Tango server")
def addJob(self, job):
""" addJob - Add a job to the job queue
"""
Config.job_requests += 1
self.log.debug("Received addJob request")
ret = self.__validateJob(job, self.preallocator.vmms)
self.log.info("Done validating job %s" % (job.name))
if ret == 0:
return self.jobQueue.add(job)
else:
self.jobQueue.addDead(job)
return -1
def delJob(self, id, deadjob):
""" delJob - Delete a job
@param id: Id of job to delete
@param deadjob - If 0, move the job from the live queue to the
dead queue. If non-zero, remove the job from the dead queue
and discard. Use with caution!
"""
self.log.debug("Received delJob(%d, %d) request" % (id, deadjob))
return self.jobQueue.delJob(id, deadjob)
def getJobs(self, item):
""" getJobs - Return the list of live jobs (item == 0) or the
list of dead jobs (item == -1).
"""
try:
self.log.debug("Received getJobs(%s) request" % (item))
if item == -1: # return the list of dead jobs
return self.jobQueue.deadJobs.values()
elif item == 0: # return the list of live jobs
return self.jobQueue.liveJobs.values()
else: # invalid parameter
return []
except Exception as e:
self.log.debug("getJobs: %s" % str(e))
def preallocVM(self, vm, num):
""" preallocVM - Set the pool size for VMs of type vm to num
"""
self.log.debug("Received preallocVM(%s,%d)request" % (vm.name, num))
try:
vmms = self.preallocator.vmms[vm.vmms]
if not vm or num < 0:
return -2
if vm.image not in vmms.getImages():
self.log.error("Invalid image name")
return -3
(name, ext) = os.path.splitext(vm.image)
vm.name = name
self.preallocator.update(vm, num)
return 0
except Exception as err:
self.log.error("preallocVM failed: %s" % err)
return -1
def getVMs(self, vmms_name):
""" getVMs - return the list of VMs managed by the service vmms_name
"""
self.log.debug("Received getVMs request(%s)" % vmms_name)
try:
if vmms_name in self.preallocator.vmms:
vmms_inst = self.preallocator.vmms[vmms_name]
return vmms_inst.getVMs()
else:
return []
except Exception as err:
self.log.error("getVMs request failed: %s" % err)
return []
def delVM(self, vmName, id):
""" delVM - delete a specific VM instance from a pool
"""
self.log.debug("Received delVM request(%s, %d)" % (vmName, id))
try:
if not vmName or vmName == "" or not id:
return -1
return self.preallocator.destroyVM(vmName, id)
except Exception as err:
self.log.error("delVM request failed: %s" % err)
return -1
def getPool(self, vmName):
""" getPool - Return the current members of a pool and its free list
"""
self.log.debug("Received getPool request(%s)" % (vmName))
try:
if not vmName or vmName == "":
return []
result = self.preallocator.getPool(vmName)
return [
"pool_size=%d" % len(result["pool"]),
"free_size=%d" % len(result["free"]),
"pool=%s" % result["pool"],
"free=%s" % result["free"]
]
except Exception as err:
self.log.error("getPool request failed: %s" % err)
return []
def getInfo(self):
""" getInfo - return various statistics about the Tango daemon
"""
stats = {}
stats['elapsed_secs'] = time.time() - self.start_time
stats['job_requests'] = Config.job_requests
stats['job_retries'] = Config.job_retries
stats['waitvm_timeouts'] = Config.waitvm_timeouts
stats['runjob_timeouts'] = Config.runjob_timeouts
stats['copyin_errors'] = Config.copyin_errors
stats['runjob_errors'] = Config.runjob_errors
stats['copyout_errors'] = Config.copyout_errors
stats['num_threads'] = threading.activeCount()
return stats
#
# Helper functions
#
def resetTango(self, vmms):
""" resetTango - resets Tango to a clean predictable state and
ensures that it has a working virtualization environment. A side
effect is that also checks that each supported VMMS is actually
running.
"""
self.log.debug("Received resetTango request.")
try:
# For each supported VMM system, get the instances it knows about,
# and kill those in the current Tango name space.
for vmms_name in vmms:
vobj = vmms[vmms_name]
vms = vobj.getVMs()
self.log.debug("Pre-existing VMs: %s" %
[vm.name for vm in vms])
namelist = []
for vm in vms:
if re.match("%s-" % Config.PREFIX, vm.name):
vobj.destroyVM(vm)
# Need a consistent abstraction for a vm between
# interfaces
namelist.append(vm.name)
if namelist:
self.log.warning("Killed these %s VMs on restart: %s" %
(vmms_name, namelist))
for _, job in self.jobQueue.liveJobs.iteritems():
if not job.isNotAssigned():
job.makeUnassigned()
self.log.debug("job: %s, assigned: %s" %
(str(job.name), str(job.assigned)))
except Exception as err:
self.log.error("resetTango: Call to VMMS %s failed: %s" %
(vmms_name, err))
os._exit(1)
def __validateJob(self, job, vmms):
""" validateJob - validate the input arguments in an addJob request.
"""
errors = 0
# If this isn't a Tango job then bail with an error
if (not isinstance(job, TangoJob)):
return -1
# Every job must have a name
if not job.name:
self.log.error("validateJob: Missing job.name")
job.appendTrace("%s|validateJob: Missing job.name" %
(datetime.utcnow().ctime()))
errors += 1
# Check the virtual machine field
if not job.vm:
self.log.error("validateJob: Missing job.vm")
job.appendTrace("%s|validateJob: Missing job.vm" %
(datetime.utcnow().ctime()))
errors += 1
else:
if not job.vm.image:
self.log.error("validateJob: Missing job.vm.image")
job.appendTrace("%s|validateJob: Missing job.vm.image" %
(datetime.utcnow().ctime()))
errors += 1
else:
vobj = vmms[Config.VMMS_NAME]
imgList = vobj.getImages()
if job.vm.image not in imgList:
self.log.error("validateJob: Image not found: %s" %
job.vm.image)
job.appendTrace("%s|validateJob: Image not found: %s" %
(datetime.utcnow().ctime(), job.vm.image))
job.appendTrace("%s|validateJob: Images available: %s" %
(datetime.utcnow().ctime(), imgList))
errors += 1
else:
(name, ext) = os.path.splitext(job.vm.image)
job.vm.name = name
if not job.vm.vmms:
self.log.error("validateJob: Missing job.vm.vmms")
job.appendTrace("%s|validateJob: Missing job.vm.vmms" %
(datetime.utcnow().ctime()))
errors += 1
else:
if job.vm.vmms not in vmms:
self.log.error("validateJob: Invalid vmms name: %s" %
job.vm.vmms)
job.appendTrace("%s|validateJob: Invalid vmms name: %s" %
(datetime.utcnow().ctime(), job.vm.vmms))
errors += 1
# Check the output file
if not job.outputFile:
self.log.error("validateJob: Missing job.outputFile")
job.appendTrace("%s|validateJob: Missing job.outputFile" %
(datetime.utcnow().ctime()))
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s",
job.outputFile)
job.appendTrace("%s|validateJob: Bad output path: %s" %
(datetime.utcnow().ctime(), job.outputFile))
errors += 1
# Check for max output file size parameter
if not job.maxOutputFileSize:
self.log.debug(
"validateJob: Setting job.maxOutputFileSize "
"to default value: %d bytes", Config.MAX_OUTPUT_FILE_SIZE)
job.maxOutputFileSize = Config.MAX_OUTPUT_FILE_SIZE
# Check the list of input files
hasMakefile = False
for inputFile in job.input:
if not inputFile.localFile:
self.log.error("validateJob: Missing inputFile.localFile")
job.appendTrace("%s|validateJob: Missing inputFile.localFile" %
(datetime.utcnow().ctime()))
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s",
job.outputFile)
job.appendTrace(
"%s|validateJob: Bad output path: %s" %
(datetime.utcnow().ctime(), job.outputFile))
errors += 1
if inputFile.destFile == 'Makefile':
hasMakefile = True
# Check if input files include a Makefile
if not hasMakefile:
self.log.error("validateJob: Missing Makefile in input files.")
job.appendTrace(
"%s|validateJob: Missing Makefile in input files." %
(datetime.utcnow().ctime()))
errors += 1
# Check if job timeout has been set; If not set timeout to default
if not job.timeout or job.timeout <= 0:
self.log.debug(
"validateJob: Setting job.timeout to"
" default config value: %d secs", Config.RUNJOB_TIMEOUT)
job.timeout = Config.RUNJOB_TIMEOUT
# Any problems, return an error status
if errors > 0:
self.log.error("validateJob: Job rejected: %d errors" % errors)
job.appendTrace("%s|validateJob: Job rejected: %d errors" %
(datetime.utcnow().ctime(), errors))
return -1
else:
return 0
class TangoServer:
""" TangoServer - Implements the API functions that the server accepts
"""
def __init__(self):
self.daemon = True
vmms = None
if Config.VMMS_NAME == "tashiSSH":
from vmms.tashiSSH import TashiSSH
vmms = TashiSSH()
elif Config.VMMS_NAME == "ec2SSH":
from vmms.ec2SSH import Ec2SSH
vmms = Ec2SSH()
elif Config.VMMS_NAME == "localDocker":
from vmms.localDocker import LocalDocker
vmms = LocalDocker()
elif Config.VMMS_NAME == "distDocker":
from vmms.distDocker import DistDocker
vmms = DistDocker()
self.preallocator = Preallocator({Config.VMMS_NAME: vmms})
self.jobQueue = JobQueue(self.preallocator)
if not Config.USE_REDIS:
# creates a local Job Manager if there is no persistent
# memory between processes. Otherwise, JobManager will
# be initiated separately
JobManager(self.jobQueue).start()
logging.basicConfig(
filename=Config.LOGFILE,
format="%(levelname)s|%(asctime)s|%(name)s|%(message)s",
level=Config.LOGLEVEL,
)
self.start_time = time.time()
self.log = logging.getLogger("TangoServer")
self.log.info("Starting Tango server")
def addJob(self, job):
""" addJob - Add a job to the job queue
"""
Config.job_requests += 1
self.log.debug("Received addJob request")
ret = self.__validateJob(job, self.preallocator.vmms)
self.log.info("Done validating job %s" % (job.name))
if ret == 0:
return self.jobQueue.add(job)
else:
self.jobQueue.addDead(job)
return -1
def delJob(self, id, deadjob):
""" delJob - Delete a job
@param id: Id of job to delete
@param deadjob - If 0, move the job from the live queue to the
dead queue. If non-zero, remove the job from the dead queue
and discard. Use with caution!
"""
self.log.debug("Received delJob(%d, %d) request" % (id, deadjob))
return self.jobQueue.delJob(id, deadjob)
def getJobs(self, item):
""" getJobs - Return the list of live jobs (item == 0) or the
list of dead jobs (item == -1).
"""
try:
self.log.debug("Received getJobs(%s) request" % (item))
if item == -1: # return the list of dead jobs
return self.jobQueue.deadJobs.values()
elif item == 0: # return the list of live jobs
return self.jobQueue.liveJobs.values()
else: # invalid parameter
return []
except Exception as e:
self.log.debug("getJobs: %s" % str(e))
def preallocVM(self, vm, num):
""" preallocVM - Set the pool size for VMs of type vm to num
"""
self.log.debug("Received preallocVM(%s,%d)request"
% (vm.name, num))
try:
vmms = self.preallocator.vmms[vm.vmms]
if not vm or num < 0:
return -2
if vm.image not in vmms.getImages():
self.log.error("Invalid image name")
return -3
(name, ext) = os.path.splitext(vm.image)
vm.name = name
self.preallocator.update(vm, num)
return 0
except Exception as err:
self.log.error("preallocVM failed: %s" % err)
return -1
def getVMs(self, vmms_name):
""" getVMs - return the list of VMs managed by the service vmms_name
"""
self.log.debug("Received getVMs request(%s)" % vmms_name)
try:
if vmms_name in self.preallocator.vmms:
vmms_inst = self.preallocator.vmms[vmms_name]
return vmms_inst.getVMs()
else:
return []
except Exception as err:
self.log.error("getVMs request failed: %s" % err)
return []
def delVM(self, vmName, id):
""" delVM - delete a specific VM instance from a pool
"""
self.log.debug("Received delVM request(%s, %d)" % (vmName, id))
try:
if not vmName or vmName == "" or not id:
return -1
return self.preallocator.destroyVM(vmName, id)
except Exception as err:
self.log.error("delVM request failed: %s" % err)
return -1
def getPool(self, vmName):
""" getPool - Return the current members of a pool and its free list
"""
self.log.debug("Received getPool request(%s)" % (vmName))
try:
if not vmName or vmName == "":
return []
result = self.preallocator.getPool(vmName)
return ["pool_size=%d" % len(result["pool"]),
"free_size=%d" % len(result["free"]),
"pool=%s" % result["pool"],
"free=%s" % result["free"]]
except Exception as err:
self.log.error("getPool request failed: %s" % err)
return []
def getInfo(self):
""" getInfo - return various statistics about the Tango daemon
"""
stats = {}
stats['elapsed_secs'] = time.time() - self.start_time;
stats['job_requests'] = Config.job_requests
stats['job_retries'] = Config.job_retries
stats['waitvm_timeouts'] = Config.waitvm_timeouts
stats['runjob_timeouts'] = Config.runjob_timeouts
stats['copyin_errors'] = Config.copyin_errors
stats['runjob_errors'] = Config.runjob_errors
stats['copyout_errors'] = Config.copyout_errors
stats['num_threads'] = threading.activeCount()
return stats
#
# Helper functions
#
def resetTango(self, vmms):
""" resetTango - resets Tango to a clean predictable state and
ensures that it has a working virtualization environment. A side
effect is that also checks that each supported VMMS is actually
running.
"""
self.log.debug("Received resetTango request.")
try:
# For each supported VMM system, get the instances it knows about,
# and kill those in the current Tango name space.
for vmms_name in vmms:
vobj = vmms[vmms_name]
vms = vobj.getVMs()
self.log.debug("Pre-existing VMs: %s" % [vm.name for vm in vms])
namelist = []
for vm in vms:
if re.match("%s-" % Config.PREFIX, vm.name):
vobj.destroyVM(vm)
# Need a consistent abstraction for a vm between
# interfaces
namelist.append(vm.name)
if namelist:
self.log.warning("Killed these %s VMs on restart: %s" %
(vmms_name, namelist))
for _, job in self.jobQueue.liveJobs.iteritems():
if not job.isNotAssigned():
job.makeUnassigned()
self.log.debug("job: %s, assigned: %s" %
(str(job.name), str(job.assigned)))
except Exception as err:
self.log.error("resetTango: Call to VMMS %s failed: %s" %
(vmms_name, err))
os._exit(1)
def __validateJob(self, job, vmms):
""" validateJob - validate the input arguments in an addJob request.
"""
errors = 0
# If this isn't a Tango job then bail with an error
if (not isinstance(job, TangoJob)):
return -1
# Every job must have a name
if not job.name:
self.log.error("validateJob: Missing job.name")
job.appendTrace("%s|validateJob: Missing job.name" %
(datetime.utcnow().ctime()))
errors += 1
# Check the virtual machine field
if not job.vm:
self.log.error("validateJob: Missing job.vm")
job.appendTrace("%s|validateJob: Missing job.vm" %
(datetime.utcnow().ctime()))
errors += 1
else:
if not job.vm.image:
self.log.error("validateJob: Missing job.vm.image")
job.appendTrace("%s|validateJob: Missing job.vm.image" %
(datetime.utcnow().ctime()))
errors += 1
else:
vobj = vmms[Config.VMMS_NAME]
imgList = vobj.getImages()
if job.vm.image not in imgList:
self.log.error("validateJob: Image not found: %s" %
job.vm.image)
job.appendTrace("%s|validateJob: Image not found: %s" %
(datetime.utcnow().ctime(), job.vm.image))
errors += 1
else:
(name, ext) = os.path.splitext(job.vm.image)
job.vm.name = name
if not job.vm.vmms:
self.log.error("validateJob: Missing job.vm.vmms")
job.appendTrace("%s|validateJob: Missing job.vm.vmms" %
(datetime.utcnow().ctime()))
errors += 1
else:
if job.vm.vmms not in vmms:
self.log.error("validateJob: Invalid vmms name: %s" % job.vm.vmms)
job.appendTrace("%s|validateJob: Invalid vmms name: %s" %
(datetime.utcnow().ctime(), job.vm.vmms))
errors += 1
# Check the output file
if not job.outputFile:
self.log.error("validateJob: Missing job.outputFile")
job.appendTrace("%s|validateJob: Missing job.outputFile" % (datetime.utcnow().ctime()))
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s", job.outputFile)
job.appendTrace("%s|validateJob: Bad output path: %s" %
(datetime.utcnow().ctime(), job.outputFile))
errors += 1
# Check for max output file size parameter
if not job.maxOutputFileSize:
self.log.debug("validateJob: Setting job.maxOutputFileSize "
"to default value: %d bytes", Config.MAX_OUTPUT_FILE_SIZE)
job.maxOutputFileSize = Config.MAX_OUTPUT_FILE_SIZE
# Check the list of input files
hasMakefile = False
for inputFile in job.input:
if not inputFile.localFile:
self.log.error("validateJob: Missing inputFile.localFile")
job.appendTrace("%s|validateJob: Missing inputFile.localFile" %
(datetime.utcnow().ctime()))
errors += 1
else:
if not os.path.exists(os.path.dirname(job.outputFile)):
self.log.error("validateJob: Bad output path: %s", job.outputFile)
job.appendTrace("%s|validateJob: Bad output path: %s" %
(datetime.utcnow().ctime(), job.outputFile))
errors += 1
if inputFile.destFile == 'Makefile':
hasMakefile = True
# Check if input files include a Makefile
if not hasMakefile:
self.log.error("validateJob: Missing Makefile in input files.")
job.appendTrace("%s|validateJob: Missing Makefile in input files." % (datetime.utcnow().ctime()))
errors+=1
# Check if job timeout has been set; If not set timeout to default
if not job.timeout or job.timeout <= 0:
self.log.debug("validateJob: Setting job.timeout to"
" default config value: %d secs", Config.RUNJOB_TIMEOUT)
job.timeout = Config.RUNJOB_TIMEOUT
# Any problems, return an error status
if errors > 0:
self.log.error("validateJob: Job rejected: %d errors" % errors)
job.appendTrace("%s|validateJob: Job rejected: %d errors" %
(datetime.utcnow().ctime(), errors))
return -1
else:
return 0
