76 lines
3.7 KiB
Python
76 lines
3.7 KiB
Python
#!/usr/bin/env python3
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# fencenode.py - Supplemental functions to handle fencing of dead nodes
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import os, sys, libvirt, uuid, kazoo.client, time, subprocess, re, ansiiprint
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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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ansiiprint.echo('Fencing node "{}" via IPMI reboot signal'.format(node_name), '', 'w')
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ipmi_hostname = zk.get('/nodes/{}/ipmihostname'.format(node_name))[0].decode('ascii')
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ipmi_username = zk.get('/nodes/{}/ipmiusername'.format(node_name))[0].decode('ascii')
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ipmi_password = zk.get('/nodes/{}/ipmipassword'.format(node_name))[0].decode('ascii')
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rebootViaIPMI(ipmi_hostname, ipmi_user, ipmi_password)
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ansiiprint.echo('Moving VMs from dead hypervisor "{}" to new hosts'.format(node_name), '', 'i')
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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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hypervisor_list = zk.get_children('/nodes')
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current_hypervisor = zk.get('/domains/{}/hypervisor'.format(dom_uuid))[0].decode('ascii')
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for hypervisor in hypervisor_list:
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state = zk.get('/nodes/{}/state'.format(hypervisor))[0].decode('ascii')
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if state != 'start' or hypervisor == current_hypervisor:
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continue
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memfree = int(zk.get('/nodes/{}/memfree'.format(hypervisor))[0].decode('ascii'))
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if memfree > most_memfree:
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most_memfree = memfree
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target_hypervisor = hypervisor
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ansiiprint.echo('Moving VM "{}" to hypervisor "{}"'.format(dom_uuid, target_hypervisor), '', 'i')
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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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transaction.set_data('/domains/{}/lasthypervisor'.format(dom_uuid), current_hypervisor.encode('ascii'))
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transaction.commit()
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#def getIPMIAddress():
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# ipmi_command = ['bash', '/fakeipmi.sh']
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#
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# # Get the IPMI address
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# ipmi_lan_output = subprocess.run(ipmi_command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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# ipmi_lan_parsed = ipmi_lan_output.stdout.decode('ascii').split('\n')
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# ipmi_lan_address = [s for s in ipmi_lan_parsed if re.search('IP Address[ ]*:', s)][0].split(':')[-1].strip()
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# return ipmi_lan_address
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def rebootViaIPMI(ipmi_hostname, ipmi_user, ipmi_password):
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ipmi_command = ['ipmitool', '-H', ipmi_hostname, '-U', ipmi_user, '-P', ipmi_password, 'chassis', 'power', 'reset']
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ipmi_command_output = subprocess.run(ipmi_command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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if ipmi_command_output == 0:
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ansiiprint.echo('Successfully rebooted dead node', '', 'o')
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else:
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ansiiprint.echo('Failed to reboot dead node', '', 'e')
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