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#!/usr/bin/python |
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# |
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"""Burnin program""" |
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import sys |
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import optparse |
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from itertools import izip, islice, cycle |
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from cStringIO import StringIO |
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|
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from ganeti import opcodes |
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from ganeti import mcpu |
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from ganeti import constants |
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from ganeti import cli |
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from ganeti import logger |
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from ganeti import errors |
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from ganeti import utils |
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USAGE = ("\tburnin -o OS_NAME [options...] instance_name ...")
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def Usage(): |
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"""Shows program usage information and exits the program.""" |
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print >> sys.stderr, "Usage:" |
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print >> sys.stderr, USAGE |
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sys.exit(2) |
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def Log(msg): |
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"""Simple function that prints out its argument. |
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""" |
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print msg |
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class Burner(object): |
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"""Burner class.""" |
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def __init__(self): |
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"""Constructor.""" |
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logger.SetupLogging(debug=False, program="ganeti/burnin") |
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self._feed_buf = StringIO() |
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self.proc = mcpu.Processor(feedback=self.Feedback) |
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self.nodes = [] |
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self.instances = [] |
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self.to_rem = [] |
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self.opts = None |
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self.ParseOptions() |
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self.GetState() |
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def ClearFeedbackBuf(self): |
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"""Clear the feedback buffer.""" |
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self._feed_buf.truncate(0) |
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def GetFeedbackBuf(self): |
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"""Return the contents of the buffer.""" |
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return self._feed_buf.getvalue() |
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def Feedback(self, msg): |
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"""Acumulate feedback in our buffer.""" |
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self._feed_buf.write(msg) |
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self._feed_buf.write("\n")
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def ExecOp(self, op): |
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"""Execute an opcode and manage the exec buffer.""" |
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self.ClearFeedbackBuf() |
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return self.proc.ExecOpCode(op) |
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def ParseOptions(self): |
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"""Parses the command line options. |
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In case of command line errors, it will show the usage and exit the |
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program. |
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""" |
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parser = optparse.OptionParser(usage="\n%s" % USAGE, |
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version="%%prog (ganeti) %s" % |
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constants.RELEASE_VERSION, |
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option_class=cli.CliOption) |
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parser.add_option("-o", "--os", dest="os", default=None,
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help="OS to use during burnin", |
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metavar="<OS>") |
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parser.add_option("--os-size", dest="os_size", help="Disk size",
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default=4 * 1024, type="unit", metavar="<size>") |
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parser.add_option("--swap-size", dest="swap_size", help="Swap size",
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default=4 * 1024, type="unit", metavar="<size>") |
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parser.add_option("-v", "--verbose",
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action="store_true", dest="verbose", default=False, |
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help="print command execution messages to stdout") |
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parser.add_option("--no-replace1", dest="do_replace1",
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help="Skip disk replacement with the same secondary", |
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action="store_false", default=True) |
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parser.add_option("--no-replace2", dest="do_replace2",
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help="Skip disk replacement with a different secondary", |
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action="store_false", default=True) |
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parser.add_option("--no-failover", dest="do_failover",
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help="Skip instance failovers", action="store_false", |
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default=True) |
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parser.add_option("-t", "--disk-template", dest="disk_template",
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choices=("remote_raid1", "drbd8"),
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default="remote_raid1", |
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help="Template type for network mirroring (remote_raid1" |
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" or drbd8) [remote_raid1]") |
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parser.add_option("-n", "--nodes", dest="nodes", default="",
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help="Comma separated list of nodes to perform" |
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" the burnin on (defaults to all nodes)") |
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options, args = parser.parse_args() |
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if len(args) < 1 or options.os is None: |
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Usage() |
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if options.disk_template == "plain": |
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disk_template = constants.DT_PLAIN |
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elif options.disk_template == "remote_raid1": |
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disk_template = constants.DT_REMOTE_RAID1 |
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elif options.disk_template == "drbd8": |
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disk_template = constants.DT_DRBD8 |
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else: |
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Log("Unknown disk template '%s'" % options.disk_template)
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sys.exit(1) |
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options.disk_template = disk_template |
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self.opts = options |
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self.instances = args |
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def GetState(self): |
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"""Read the cluster state from the config.""" |
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if self.opts.nodes: |
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names = self.opts.nodes.split(",")
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else: |
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names = [] |
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try: |
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op = opcodes.OpQueryNodes(output_fields=["name"], names=names) |
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result = self.ExecOp(op) |
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except errors.GenericError, err: |
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err_code, msg = cli.FormatError(err) |
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Log(msg) |
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sys.exit(err_code) |
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self.nodes = [data[0] for data in result] |
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result = self.ExecOp(opcodes.OpDiagnoseOS()) |
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if not result: |
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Log("Can't get the OS list")
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sys.exit(1) |
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# filter non-valid OS-es |
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oses = {}
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for node_name in result: |
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oses[node_name] = [obj for obj in result[node_name] if obj] |
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fnode = oses.keys()[0] |
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os_set = set([os_inst.name for os_inst in oses[fnode]]) |
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del oses[fnode] |
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for node in oses: |
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os_set &= set([os_inst.name for os_inst in oses[node]]) |
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if self.opts.os not in os_set: |
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Log("OS '%s' not found" % self.opts.os)
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sys.exit(1) |
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def CreateInstances(self): |
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"""Create the given instances. |
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""" |
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self.to_rem = [] |
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mytor = izip(cycle(self.nodes), |
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islice(cycle(self.nodes), 1, None), |
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self.instances) |
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for pnode, snode, instance in mytor: |
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op = opcodes.OpCreateInstance(instance_name=instance, |
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mem_size=128, |
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disk_size=self.opts.os_size, |
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swap_size=self.opts.swap_size, |
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disk_template=self.opts.disk_template, |
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mode=constants.INSTANCE_CREATE, |
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os_type=self.opts.os, |
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pnode=pnode, |
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snode=snode, |
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vcpus=1, |
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start=True, |
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ip_check=True, |
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wait_for_sync=True) |
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Log("- Add instance %s on node %s" % (instance, pnode))
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self.ExecOp(op) |
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self.to_rem.append(instance) |
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def ReplaceDisks1R1(self): |
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"""Replace disks with the same secondary for rr1.""" |
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# replace all, both disks |
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for instance in self.instances: |
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op = opcodes.OpReplaceDisks(instance_name=instance, |
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remote_node=None, |
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mode=constants.REPLACE_DISK_ALL, |
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disks=["sda", "sdb"]) |
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Log("- Replace disks for instance %s" % (instance))
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self.ExecOp(op) |
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def ReplaceDisks1D8(self): |
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"""Replace disks on primary and secondary for drbd8.""" |
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for instance in self.instances: |
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for mode in constants.REPLACE_DISK_SEC, constants.REPLACE_DISK_PRI: |
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op = opcodes.OpReplaceDisks(instance_name=instance, |
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mode=mode, |
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disks=["sda", "sdb"]) |
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Log("- Replace disks (%s) for instance %s" % (mode, instance))
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self.ExecOp(op) |
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def ReplaceDisks2(self): |
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"""Replace secondary node.""" |
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if self.opts.disk_template == constants.DT_REMOTE_RAID1: |
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mode = constants.REPLACE_DISK_ALL |
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else: |
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mode = constants.REPLACE_DISK_SEC |
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mytor = izip(islice(cycle(self.nodes), 2, None), |
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self.instances) |
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for tnode, instance in mytor: |
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op = opcodes.OpReplaceDisks(instance_name=instance, |
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mode=mode, |
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remote_node=tnode, |
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disks=["sda", "sdb"]) |
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Log("- Replace secondary (%s) for instance %s" % (mode, instance))
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self.ExecOp(op) |
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def Failover(self): |
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"""Failover the instances.""" |
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for instance in self.instances: |
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op = opcodes.OpFailoverInstance(instance_name=instance, |
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ignore_consistency=False) |
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Log("- Failover instance %s" % (instance))
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self.ExecOp(op) |
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def StopStart(self): |
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"""Stop/start the instances.""" |
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for instance in self.instances: |
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op = opcodes.OpShutdownInstance(instance_name=instance) |
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Log("- Shutdown instance %s" % instance)
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self.ExecOp(op) |
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op = opcodes.OpStartupInstance(instance_name=instance, force=False) |
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Log("- Start instance %s" % instance)
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self.ExecOp(op) |
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def Remove(self): |
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"""Remove the instances.""" |
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for instance in self.to_rem: |
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op = opcodes.OpRemoveInstance(instance_name=instance) |
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Log("- Remove instance %s" % instance)
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self.ExecOp(op) |
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def BurninCluster(self): |
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"""Test a cluster intensively. |
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This will create instances and then start/stop/failover them. |
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It is safe for existing instances but could impact performance. |
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""" |
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opts = self.opts |
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Log("- Testing global parameters")
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if len(self.nodes) == 1 and opts.disk_template != constants.DT_PLAIN: |
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Log("When one node is available/selected the disk template must"
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" be 'plain'") |
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sys.exit(1) |
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has_err = True |
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try: |
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self.CreateInstances() |
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if opts.do_replace1 and opts.disk_template in constants.DTS_NET_MIRROR: |
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if opts.disk_template == constants.DT_REMOTE_RAID1: |
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self.ReplaceDisks1R1() |
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elif opts.disk_template == constants.DT_DRBD8: |
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self.ReplaceDisks1D8() |
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if (opts.do_replace2 and len(self.nodes) > 2 and |
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opts.disk_template in constants.DTS_NET_MIRROR) : |
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self.ReplaceDisks2() |
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if opts.do_failover and opts.disk_template in constants.DTS_NET_MIRROR: |
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self.Failover() |
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self.StopStart() |
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has_err = False |
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finally: |
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if has_err: |
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Log("Error detected: opcode buffer follows:\n\n")
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Log(self.GetFeedbackBuf()) |
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Log("\n\n")
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self.Remove() |
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return 0 |
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def main(): |
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"""Main function""" |
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burner = Burner() |
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try: |
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utils.Lock('cmd', max_retries=15, debug=True)
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except errors.LockError, err: |
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logger.ToStderr(str(err)) |
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return 1 |
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try: |
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retval = burner.BurninCluster() |
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finally: |
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utils.Unlock('cmd')
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utils.LockCleanup() |
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return retval |
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if __name__ == "__main__": |
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main() |