Add ANSII colours to output commands for easy parsing
This commit is contained in:
parent
ad1bf35837
commit
640f38c3aa
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@ -22,6 +22,17 @@
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import os, sys, socket, time, libvirt, kazoo.client, threading, fencenode
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# ANSII colours for output
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class bcolours:
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PURPLE = '\033[95m'
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BLUE = '\033[94m'
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GREEN = '\033[92m'
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YELLOW = '\033[93m'
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RED = '\033[91m'
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ENDC = '\033[0m'
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BOLD = '\033[1m'
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UNDERLINE = '\033[4m'
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class NodeInstance():
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def __init__(self, name, t_node, s_domain, zk):
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# Passed-in variables on creation
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@ -87,7 +98,7 @@ class NodeInstance():
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# Flush all VMs on the host
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def flush(self):
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print('>>> Flushing node {} of running VMs.'.format(self.name))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Flushing node {} of running VMs.'.format(self.name))
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for dom_uuid in self.domain_list:
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most_memfree = 0
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target_hypervisor = None
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@ -104,12 +115,12 @@ class NodeInstance():
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target_hypervisor = hypervisor
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if target_hypervisor == None:
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print('>>> Failed to find migration target for VM "{}"; shutting down.'.format(dom_uuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Failed to find migration target for VM "{}"; shutting down.'.format(dom_uuid))
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transaction = self.zk.transaction()
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transaction.set_data('/domains/{}/state'.format(dom_uuid), 'shutdown'.encode('ascii'))
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transaction.commit()
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else:
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print('>>> Migrating VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Migrating VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
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transaction = self.zk.transaction()
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transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
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transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), target_hypervisor.encode('ascii'))
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@ -120,14 +131,14 @@ class NodeInstance():
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time.sleep(1)
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def unflush(self):
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print('>>> Restoring node {} to active service.'.format(self.name))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Restoring node {} to active service.'.format(self.name))
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self.zk.set('/nodes/{}/state'.format(self.name), 'start'.encode('ascii'))
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for dom_uuid in self.s_domain:
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last_hypervisor = self.zk.get('/domains/{}/lasthypervisor'.format(dom_uuid))[0].decode('ascii')
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if last_hypervisor != self.name:
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continue
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print('>>> Setting unmigration for VM "{}".'.format(dom_uuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Setting unmigration for VM "{}".'.format(dom_uuid))
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transaction = self.zk.transaction()
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transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
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transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), self.name.encode('ascii'))
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@ -142,7 +153,7 @@ class NodeInstance():
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libvirt_name = "qemu:///system"
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conn = libvirt.open(libvirt_name)
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if conn == None:
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print('>>> Failed to open connection to {}'.format(libvirt_name))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Failed to open connection to {}'.format(libvirt_name))
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return
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# Get past state and update if needed
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@ -193,7 +204,7 @@ class NodeInstance():
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conn.close()
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# Display node information to the terminal
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print('>>> {} - {} keepalive'.format(time.strftime('%d/%m/%Y %H:%M:%S'), self.name))
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print(bcolours.PURPLE + '>>> ' + bcolours.ENDC + '{} - {} keepalive'.format(time.strftime('%d/%m/%Y %H:%M:%S'), self.name))
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print(' CPUs: {} | Free memory: {} | Load: {}'.format(self.cpucount, self.memfree, self.cpuload))
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print(' Active domains: {}'.format(' '.join(self.domain_list)))
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@ -210,7 +221,7 @@ class NodeInstance():
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# (A node is considered dead when its keepalive timer is >30s out-of-date while in 'start' state)
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node_deadtime = int(time.time()) - 30
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if node_keepalive < node_deadtime and node_state == 'start':
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print('>>> Node {} is dead! Performing fence operation in 3 seconds.'.format(node_name))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Node {} is dead! Performing fence operation in 3 seconds.'.format(node_name))
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self.zk.set('/nodes/{}/state'.format(node_name), 'dead'.encode('ascii'))
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fence_thread = threading.Thread(target=fencenode.fence, args=(node_name, self.zk), kwargs={})
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fence_thread.start()
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@ -248,7 +259,7 @@ class NodeInstance():
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pass
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# Display cluster information to the terminal
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print('>>> {} - Cluster status'.format(time.strftime('%d/%m/%Y %H:%M:%S')))
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print(bcolours.PURPLE + '>>> ' + bcolours.ENDC + '{} - Cluster status'.format(time.strftime('%d/%m/%Y %H:%M:%S')))
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print(' Active nodes: {}'.format(' '.join(self.active_node_list)))
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print(' Flushed nodes: {}'.format(' '.join(self.flushed_node_list)))
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print(' Inactive nodes: {}'.format(' '.join(self.inactive_node_list)))
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@ -22,6 +22,17 @@
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import os, sys, uuid, socket, time, threading, libvirt, kazoo.client
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# ANSII colours for output
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class bcolours:
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PURPLE = '\033[95m'
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BLUE = '\033[94m'
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GREEN = '\033[92m'
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YELLOW = '\033[93m'
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RED = '\033[91m'
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ENDC = '\033[0m'
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BOLD = '\033[1m'
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UNDERLINE = '\033[4m'
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class VMInstance:
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def __init__(self, domuuid, zk, thishypervisor):
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# Passed-in variables on creation
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@ -67,52 +78,54 @@ class VMInstance:
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# Start up the VM
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def start_vm(self, xmlconfig):
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print(">>> {} - Starting VM.".format(self.domuuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Starting VM.'.format(self.domuuid))
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self.instart = True
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# Start up a new Libvirt connection
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libvirt_name = "qemu:///system"
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conn = libvirt.open(libvirt_name)
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if conn == None:
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print('>>> {} - Failed to open local libvirt connection.'.format(self.domuuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to open local libvirt connection.'.format(self.domuuid))
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self.instart = False
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return
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try:
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dom = conn.createXML(xmlconfig, 0)
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except libvirt.libvirtError as e:
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print('>>> {} - Failed to create VM.'.format(self.domuuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to create VM.'.format(self.domuuid))
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self.zk.set('/domains/{}/state'.format(self.domuuid), 'stop'.encode('ascii'))
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if not self.domuuid in self.thishypervisor.domain_list:
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self.thishypervisor.domain_list.append(self.domuuid)
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conn.close()
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Successfully started VM.'.format(self.domuuid))
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self.dom = dom
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self.instart = False
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# Stop the VM forcibly without updating state
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def terminate_vm(self):
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print(">>> {} - Terminating VM.".format(self.domuuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Terminating VM.'.format(self.domuuid))
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self.instop = True
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try:
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self.dom.destroy()
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except AttributeError:
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pass
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to terminate VM.'.format(self.domuuid))
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if self.domuuid in self.thishypervisor.domain_list:
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try:
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self.thishypervisor.domain_list.remove(self.domuuid)
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except ValueError:
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pass
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Successfully terminated VM.'.format(self.domuuid))
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# Stop the VM forcibly
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def stop_vm(self):
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print(">>> {} - Forcibly stopping VM.".format(self.domuuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Forcibly stopping VM.'.format(self.domuuid))
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self.instop = True
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try:
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self.dom.destroy()
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except AttributeError:
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pass
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to stop VM.'.format(self.domuuid))
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if self.domuuid in self.thishypervisor.domain_list:
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try:
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self.thishypervisor.domain_list.remove(self.domuuid)
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@ -120,12 +133,13 @@ class VMInstance:
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pass
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self.zk.set('/domains/{}/state'.format(self.domuuid), 'stop'.encode('ascii'))
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Successfully stopped VM.'.format(self.domuuid))
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self.dom = None
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self.instop = False
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# Shutdown the VM gracefully
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def shutdown_vm(self):
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print(">>> {} - Gracefully stopping VM.".format(self.domuuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Gracefully stopping VM.'.format(self.domuuid))
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self.inshutdown = True
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self.dom.shutdown()
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try:
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@ -135,7 +149,7 @@ class VMInstance:
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time.sleep(0.5)
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if tick >= 60:
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print(">>> {} - Shutdown timeout expired.".format(self.domuuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Shutdown timeout expired.'.format(self.domuuid))
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self.stop_vm()
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self.inshutdown = False
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return
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@ -149,6 +163,7 @@ class VMInstance:
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pass
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self.zk.set('/domains/{}/state'.format(self.domuuid), 'stop'.encode('ascii'))
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Successfully shutdown VM.'.format(self.domuuid))
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self.dom = None
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self.inshutdown = False
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@ -158,14 +173,14 @@ class VMInstance:
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if dest_conn == None:
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raise
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except:
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print('>>> {} - Failed to open connection to qemu+tcp://{}/system; aborting migration.'.format(self.dom_uuid, self.hypervisor))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to open connection to qemu+tcp://{}/system; aborting migration.'.format(self.dom_uuid, self.hypervisor))
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return 1
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try:
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target_dom = self.dom.migrate(dest_conn, libvirt.VIR_MIGRATE_LIVE, None, None, 0)
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if target_dom == None:
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raise
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print('>>> {} - Migrated successfully.'.format(self.domuuid))
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Migrated successfully.'.format(self.domuuid))
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except:
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dest_conn.close()
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return 1
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@ -177,10 +192,10 @@ class VMInstance:
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def migrate_vm(self):
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self.inmigrate = True
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print('>>> {} - Migrating VM to hypervisor "{}".'.format(self.domuuid, self.hypervisor))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Migrating VM to hypervisor "{}".'.format(self.domuuid, self.hypervisor))
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migrate_ret = self.live_migrate_vm(self.hypervisor)
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if migrate_ret != 0:
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print('>>> {} - Could not live migrate VM; shutting down to migrate instead.'.format(self.domuuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Could not live migrate VM; shutting down to migrate instead.'.format(self.domuuid))
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self.shutdown_vm()
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time.sleep(1)
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self.zk.set('/domains/{}/state'.format(self.domuuid), 'start'.encode('ascii'))
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@ -194,7 +209,7 @@ class VMInstance:
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# Receive the migration from another host (wait until VM is running)
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def receive_migrate(self):
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print('>>> {} - Receiving migration.'.format(self.domuuid))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + '{} - Receiving migration.'.format(self.domuuid))
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self.inreceive = True
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while True:
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self.dom = lookupByUUID(self.domuuid)
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@ -209,7 +224,7 @@ class VMInstance:
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if not self.domuuid in self.thishypervisor.domain_list:
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self.thishypervisor.domain_list.append(self.domuuid)
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print('>>> {} - Migrated successfully.'.format(self.domuuid))
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print(bcolours.GREEN + '>>> ' + bcolours.ENDC + '{} - Migrated successfully.'.format(self.domuuid))
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self.inreceive = False
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#
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@ -274,7 +289,7 @@ def lookupByUUID(tuuid):
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# Open a libvirt connection
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conn = libvirt.open(libvirt_name)
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if conn == None:
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print('>>> {} - Failed to open local libvirt connection.'.format(self.domuuid))
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print(bcolours.RED + '>>> ' + bcolours.ENDC + '{} - Failed to open local libvirt connection.'.format(self.domuuid))
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return dom
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# Lookup the UUID
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17
fencenode.py
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fencenode.py
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@ -22,16 +22,27 @@
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import os, sys, libvirt, uuid, kazoo.client, time
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# ANSII colours for output
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class bcolours:
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PURPLE = '\033[95m'
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BLUE = '\033[94m'
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GREEN = '\033[92m'
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YELLOW = '\033[93m'
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RED = '\033[91m'
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ENDC = '\033[0m'
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BOLD = '\033[1m'
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UNDERLINE = '\033[4m'
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#
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# Trigger function
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#
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def fence(node_name, zk):
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time.sleep(3)
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print('>>> Fencing node {} via IPMI reboot signal.'.format(node_name))
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print(bcolours.YELLOW + '>>> ' + bcolours.ENDC + 'Fencing node {} via IPMI reboot signal.'.format(node_name))
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# DO IPMI FENCE HERE
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print('>>> Moving VMs from dead hypervisor {} to new hosts.'.format(node_name))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Moving VMs from dead hypervisor {} to new hosts.'.format(node_name))
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dead_node_running_domains = zk.get('/nodes/{}/runningdomains'.format(node_name))[0].decode('ascii').split()
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for dom_uuid in dead_node_running_domains:
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most_memfree = 0
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@ -47,7 +58,7 @@ def fence(node_name, zk):
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most_memfree = memfree
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target_hypervisor = hypervisor
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print('>>> Moving VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
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print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Moving VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
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transaction = zk.transaction()
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transaction.set_data('/domains/{}/state'.format(dom_uuid), 'start'.encode('ascii'))
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transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), target_hypervisor.encode('ascii'))
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5
pvcd.py
5
pvcd.py
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@ -31,8 +31,9 @@ import time
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import atexit
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import apscheduler.schedulers.background
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# ANSII colours for output
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class bcolours:
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HEADER = '\033[95m'
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PURPLE = '\033[95m'
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BLUE = '\033[94m'
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GREEN = '\033[92m'
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YELLOW = '\033[93m'
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@ -42,7 +43,7 @@ class bcolours:
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UNDERLINE = '\033[4m'
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def help():
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print(bcolours.HEADER + bcolours.BOLD + bcolours.RED + "pvcd - Parallel Virtual Cluster management daemon" + bcolours.ENDC)
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print(bcolours.BOLD + "pvcd - Parallel Virtual Cluster management daemon" + bcolours.ENDC)
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# exit(0)
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help()
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