def getList(node):
if core.cfg['QUIET']:
msg = ""
for vm in sorted(node.get_vms(),key=lambda x: x.name):
msg += vm.name + "\n"
else:
# Max 80 columns wide
msg = "\nOn %s :\n" % (node.get_hostname())
msg += "-----" + "-" * len(node.get_hostname()) + '\n'
msg += '\n %-60s %4s %5s %6s\n' % ("Name","Mem", "VCPUs","State")
for vm in sorted(node.get_vms(),key=lambda x: x.name):
msg += ' %-60s %4d %5d %6s\n' % (vm.name, vm.ram, vm.vcpu, vm.state)
return (node.get_hostname(), msg)
def loadbalance(self):
"""
Run the loadbalancer on the cluster and migrate vm accordingly.
See cxm.loadbalancer module for details about algorithm.
"""
if not core.cfg['QUIET']: print "Recording metrics..."
current_state = {}
vm_metrics = {}
node_metrics = {}
for node in self.get_nodes():
node.metrics.init_cache(
) # Early call to increase timeslice used to compute rates
vms = node.get_vms()
# Get current cluster state
current_state[node.get_hostname()] = [vm.name for vm in vms]
# Get node's metrics
node_metrics[node.get_hostname()] = {
'ram': node.metrics.get_available_ram()
}
# Get VM's metrics
cpu = node.metrics.get_vms_cpu_usage()
io = node.metrics.get_vms_disk_io_rate()
for vm in vms:
vm_metrics[vm.name] = {}
vm_metrics[vm.name]['ram'] = vm.get_ram()
vm_metrics[vm.name]['cpu'] = cpu[vm.name]
vm_metrics[
vm.name]['io'] = io[vm.name]['Read'] + io[vm.name]['Write']
# Initialize loadbalancer
lb = loadbalancer.LoadBalancer(current_state)
lb.set_metrics(vm_metrics, node_metrics)
solution = lb.get_solution()
if not solution:
print "No better solution found with a minimal gain of %s%%." % core.cfg[
'LB_MIN_GAIN']
else:
# Ask the user for a confirmation
if not core.cfg['QUIET']:
print "Here is the proposed migration plan:"
for path in solution.get_path():
print " -> Migrate", path['vm'], "from", path[
'src'], "to", path['dst']
if (raw_input("Proceed ? [y/N]:").upper() != "Y"):
print "Aborded by user."
return
# Do migrations to put the cluster in the selected state
for path in solution.get_path():
if not core.cfg['QUIET']:
print "Migrating", path['vm'], "from", path[
'src'], "to", path['dst'], "..."
self.migrate(path['vm'], path['src'], path['dst'])
def loadbalance(self):
"""
Run the loadbalancer on the cluster and migrate vm accordingly.
See cxm.loadbalancer module for details about algorithm.
"""
if not core.cfg["QUIET"]:
print "Recording metrics..."
current_state = {}
vm_metrics = {}
node_metrics = {}
for node in self.get_nodes():
node.metrics.init_cache() # Early call to increase timeslice used to compute rates
vms = node.get_vms()
# Get current cluster state
current_state[node.get_hostname()] = [vm.name for vm in vms]
# Get node's metrics
node_metrics[node.get_hostname()] = {"ram": node.metrics.get_available_ram()}
# Get VM's metrics
cpu = node.metrics.get_vms_cpu_usage()
io = node.metrics.get_vms_disk_io_rate()
for vm in vms:
vm_metrics[vm.name] = {}
vm_metrics[vm.name]["ram"] = vm.get_ram()
vm_metrics[vm.name]["cpu"] = cpu[vm.name]
vm_metrics[vm.name]["io"] = io[vm.name]["Read"] + io[vm.name]["Write"]
# Initialize loadbalancer
lb = loadbalancer.LoadBalancer(current_state)
lb.set_metrics(vm_metrics, node_metrics)
solution = lb.get_solution()
if not solution:
print "No better solution found with a minimal gain of %s%%." % core.cfg["LB_MIN_GAIN"]
else:
# Ask the user for a confirmation
if not core.cfg["QUIET"]:
print "Here is the proposed migration plan:"
for path in solution.get_path():
print " -> Migrate", path["vm"], "from", path["src"], "to", path["dst"]
if raw_input("Proceed ? [y/N]:").upper() != "Y":
print "Aborded by user."
return
# Do migrations to put the cluster in the selected state
for path in solution.get_path():
if not core.cfg["QUIET"]:
print "Migrating", path["vm"], "from", path["src"], "to", path["dst"], "..."
self.migrate(path["vm"], path["src"], path["dst"])
def cxm_list(cluster, options):
"""List started VM on all nodes."""
if options.node:
nodes=[cluster.get_node(options.node)]
else:
nodes=cluster.get_nodes()
for node in nodes:
print "\nOn", node.get_hostname(), ":"
if not core.cfg['QUIET']:
print "-----" + "-" * len(node.get_hostname())
print '\n %-40s %4s %5s %6s' % ("Name","Mem", "VCPUs","State")
for vm in sorted(node.get_vms(),key=lambda x: x.name):
print ' %-40s %4d %5d %6s' % (vm.name, vm.ram, vm.vcpu, vm.state)
def check(self):
"""Perform a sanity check of the cluster.
Return a corresponding exit code (0=success, 0!=error)
"""
if not core.cfg["QUIET"]:
print "Checking for duplicate VM..."
safe = True
# Get cluster wide VM list
vm_by_node = dict()
for node in self.get_nodes():
vm_by_node[node.get_hostname()] = node.get_vms()
if core.cfg["DEBUG"]:
print "DEBUG vm_by_node=", vm_by_node
# Invert key/value of the dict
node_by_vm = dict()
for node, vms in vm_by_node.items():
for vm in vms:
try:
node_by_vm[vm.name].append(node)
except KeyError:
node_by_vm[vm.name] = [node]
if core.cfg["DEBUG"]:
print "DEBUG node_by_vm =", node_by_vm
# Check duplicate VM
for vm, nodes in node_by_vm.items():
if len(nodes) > 1:
print " ** WARNING : " + vm + " is running on " + " and ".join(nodes)
safe = False
# Check bridges
if not self.check_bridges():
safe = False
# Other checks
for node in self.get_nodes():
# Check (non)activation of LVs
if not node.check_lvs():
safe = False
# Check autostart link
if not node.check_autostart():
safe = False
return safe
def check(self):
"""Perform a sanity check of the cluster.
Return a corresponding exit code (0=success, 0!=error)
"""
if not core.cfg['QUIET']: print "Checking for duplicate VM..."
safe = True
# Get cluster wide VM list
vm_by_node = dict()
for node in self.get_nodes():
vm_by_node[node.get_hostname()] = node.get_vms()
if core.cfg['DEBUG']: print "DEBUG vm_by_node=", vm_by_node
# Invert key/value of the dict
node_by_vm = dict()
for node, vms in vm_by_node.items():
for vm in vms:
try:
node_by_vm[vm.name].append(node)
except KeyError:
node_by_vm[vm.name] = [node]
if core.cfg['DEBUG']: print "DEBUG node_by_vm =", node_by_vm
# Check duplicate VM
for vm, nodes in node_by_vm.items():
if len(nodes) > 1:
print " ** WARNING : " + vm + " is running on " + " and ".join(
nodes)
safe = False
# Check bridges
if not self.check_bridges():
safe = False
# Other checks
for node in self.get_nodes():
# Check (non)activation of LVs
if not node.check_lvs():
safe = False
# Check autostart link
if not node.check_autostart():
safe = False
return safe
