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Add ANSII colours to output commands for easy parsing

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This commit is contained in:
Joshua Boniface
2018-06-06 22:56:03 -04:00
parent ad1bf35837
commit 640f38c3aa
4 changed files with 68 additions and 30 deletions
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29
NodeInstance.py
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@ -22,6 +22,17 @@
import os, sys, socket, time, libvirt, kazoo.client, threading, fencenode
# ANSII colours for output
class bcolours:
PURPLE = '\033[95m'
BLUE = '\033[94m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RED = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
class NodeInstance():
def __init__(self, name, t_node, s_domain, zk):
# Passed-in variables on creation
@ -87,7 +98,7 @@ class NodeInstance():
# Flush all VMs on the host
def flush(self):
print('>>> Flushing node {} of running VMs.'.format(self.name))
print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Flushing node {} of running VMs.'.format(self.name))
for dom_uuid in self.domain_list:
most_memfree = 0
target_hypervisor = None
@ -104,12 +115,12 @@ class NodeInstance():
target_hypervisor = hypervisor
if target_hypervisor == None:
print('>>> Failed to find migration target for VM "{}"; shutting down.'.format(dom_uuid))
print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Failed to find migration target for VM "{}"; shutting down.'.format(dom_uuid))
transaction = self.zk.transaction()
transaction.set_data('/domains/{}/state'.format(dom_uuid), 'shutdown'.encode('ascii'))
transaction.commit()
else:
print('>>> Migrating VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Migrating VM "{}" to hypervisor "{}".'.format(dom_uuid, target_hypervisor))
transaction = self.zk.transaction()
transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), target_hypervisor.encode('ascii'))
@ -120,14 +131,14 @@ class NodeInstance():
time.sleep(1)
def unflush(self):
print('>>> Restoring node {} to active service.'.format(self.name))
print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Restoring node {} to active service.'.format(self.name))
self.zk.set('/nodes/{}/state'.format(self.name), 'start'.encode('ascii'))
for dom_uuid in self.s_domain:
last_hypervisor = self.zk.get('/domains/{}/lasthypervisor'.format(dom_uuid))[0].decode('ascii')
if last_hypervisor != self.name:
continue
print('>>> Setting unmigration for VM "{}".'.format(dom_uuid))
print(bcolours.BLUE + '>>> ' + bcolours.ENDC + 'Setting unmigration for VM "{}".'.format(dom_uuid))
transaction = self.zk.transaction()
transaction.set_data('/domains/{}/state'.format(dom_uuid), 'migrate'.encode('ascii'))
transaction.set_data('/domains/{}/hypervisor'.format(dom_uuid), self.name.encode('ascii'))
@ -142,7 +153,7 @@ class NodeInstance():
libvirt_name = "qemu:///system"
conn = libvirt.open(libvirt_name)
if conn == None:
print('>>> Failed to open connection to {}'.format(libvirt_name))
print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Failed to open connection to {}'.format(libvirt_name))
return
# Get past state and update if needed
@ -193,7 +204,7 @@ class NodeInstance():
conn.close()
# Display node information to the terminal
print('>>> {} - {} keepalive'.format(time.strftime('%d/%m/%Y %H:%M:%S'), self.name))
print(bcolours.PURPLE + '>>> ' + bcolours.ENDC + '{} - {} keepalive'.format(time.strftime('%d/%m/%Y %H:%M:%S'), self.name))
print(' CPUs: {} | Free memory: {} | Load: {}'.format(self.cpucount, self.memfree, self.cpuload))
print(' Active domains: {}'.format(' '.join(self.domain_list)))
@ -210,7 +221,7 @@ class NodeInstance():
# (A node is considered dead when its keepalive timer is >30s out-of-date while in 'start' state)
node_deadtime = int(time.time()) - 30
if node_keepalive < node_deadtime and node_state == 'start':
print('>>> Node {} is dead! Performing fence operation in 3 seconds.'.format(node_name))
print(bcolours.RED + '>>> ' + bcolours.ENDC + 'Node {} is dead! Performing fence operation in 3 seconds.'.format(node_name))
self.zk.set('/nodes/{}/state'.format(node_name), 'dead'.encode('ascii'))
fence_thread = threading.Thread(target=fencenode.fence, args=(node_name, self.zk), kwargs={})
fence_thread.start()
@ -248,7 +259,7 @@ class NodeInstance():
pass
# Display cluster information to the terminal
print('>>> {} - Cluster status'.format(time.strftime('%d/%m/%Y %H:%M:%S')))
print(bcolours.PURPLE + '>>> ' + bcolours.ENDC + '{} - Cluster status'.format(time.strftime('%d/%m/%Y %H:%M:%S')))
print(' Active nodes: {}'.format(' '.join(self.active_node_list)))
print(' Flushed nodes: {}'.format(' '.join(self.flushed_node_list)))
print(' Inactive nodes: {}'.format(' '.join(self.inactive_node_list)))