Convert fencing to new zkhandler
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1c9a7a6479
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@ -21,7 +21,6 @@
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import time
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import pvcnoded.zkhandler as zkhandler
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import pvcnoded.common as common
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import pvcnoded.VMInstance as VMInstance
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@ -29,7 +28,7 @@ import pvcnoded.VMInstance as VMInstance
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#
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# Fence thread entry function
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#
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def fenceNode(node_name, zk_conn, config, logger):
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def fenceNode(node_name, zkhandler, config, logger):
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# We allow exactly 6 saving throws (30 seconds) for the host to come back online or we kill it
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failcount_limit = 6
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failcount = 0
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@ -37,7 +36,7 @@ def fenceNode(node_name, zk_conn, config, logger):
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# Wait 5 seconds
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time.sleep(config['keepalive_interval'])
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# Get the state
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node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
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node_daemon_state = zkhandler.read('/nodes/{}/daemonstate'.format(node_name))
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# Is it still 'dead'
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if node_daemon_state == 'dead':
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failcount += 1
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@ -50,9 +49,9 @@ def fenceNode(node_name, zk_conn, config, logger):
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logger.out('Fencing node "{}" via IPMI reboot signal'.format(node_name), state='w')
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# Get IPMI information
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ipmi_hostname = zkhandler.readdata(zk_conn, '/nodes/{}/ipmihostname'.format(node_name))
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ipmi_username = zkhandler.readdata(zk_conn, '/nodes/{}/ipmiusername'.format(node_name))
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ipmi_password = zkhandler.readdata(zk_conn, '/nodes/{}/ipmipassword'.format(node_name))
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ipmi_hostname = zkhandler.read('/nodes/{}/ipmihostname'.format(node_name))
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ipmi_username = zkhandler.read('/nodes/{}/ipmiusername'.format(node_name))
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ipmi_password = zkhandler.read('/nodes/{}/ipmipassword'.format(node_name))
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# Shoot it in the head
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fence_status = rebootViaIPMI(ipmi_hostname, ipmi_username, ipmi_password, logger)
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@ -62,47 +61,53 @@ def fenceNode(node_name, zk_conn, config, logger):
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# Force into secondary network state if needed
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if node_name in config['coordinators']:
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logger.out('Forcing secondary status for node "{}"'.format(node_name), state='i')
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zkhandler.writedata(zk_conn, {'/nodes/{}/routerstate'.format(node_name): 'secondary'})
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if zkhandler.readdata(zk_conn, '/config/primary_node') == node_name:
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zkhandler.writedata(zk_conn, {'/config/primary_node': 'none'})
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zkhandler.write([
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('/nodes/{}/routerstate'.format(node_name), 'secondary')
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])
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if zkhandler.read('/config/primary_node') == node_name:
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zkhandler.write([
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('/config/primary_node', 'none')
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])
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# If the fence succeeded and successful_fence is migrate
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if fence_status and config['successful_fence'] == 'migrate':
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migrateFromFencedNode(zk_conn, node_name, config, logger)
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migrateFromFencedNode(zkhandler, node_name, config, logger)
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# If the fence failed and failed_fence is migrate
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if not fence_status and config['failed_fence'] == 'migrate' and config['suicide_intervals'] != '0':
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migrateFromFencedNode(zk_conn, node_name, config, logger)
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migrateFromFencedNode(zkhandler, node_name, config, logger)
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# Migrate hosts away from a fenced node
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def migrateFromFencedNode(zk_conn, node_name, config, logger):
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def migrateFromFencedNode(zkhandler, node_name, config, logger):
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logger.out('Migrating VMs from dead node "{}" to new hosts'.format(node_name), state='i')
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# Get the list of VMs
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dead_node_running_domains = zkhandler.readdata(zk_conn, '/nodes/{}/runningdomains'.format(node_name)).split()
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dead_node_running_domains = zkhandler.read('/nodes/{}/runningdomains'.format(node_name)).split()
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# Set the node to a custom domainstate so we know what's happening
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zkhandler.writedata(zk_conn, {'/nodes/{}/domainstate'.format(node_name): 'fence-flush'})
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zkhandler.write([
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('/nodes/{}/domainstate'.format(node_name), 'fence-flush')
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])
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# Migrate a VM after a flush
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def fence_migrate_vm(dom_uuid):
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VMInstance.flush_locks(zk_conn, logger, dom_uuid)
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VMInstance.flush_locks(zkhandler, logger, dom_uuid)
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target_node = common.findTargetNode(zk_conn, config, logger, dom_uuid)
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target_node = common.findTargetNode(zkhandler, config, logger, dom_uuid)
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if target_node is not None:
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logger.out('Migrating VM "{}" to node "{}"'.format(dom_uuid, target_node), state='i')
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zkhandler.writedata(zk_conn, {
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'/domains/{}/state'.format(dom_uuid): 'start',
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'/domains/{}/node'.format(dom_uuid): target_node,
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'/domains/{}/lastnode'.format(dom_uuid): node_name
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})
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zkhandler.write([
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('/domains/{}/state'.format(dom_uuid), 'start'),
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('/domains/{}/node'.format(dom_uuid), target_node),
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('/domains/{}/lastnode'.format(dom_uuid), node_name)
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])
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else:
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logger.out('No target node found for VM "{}"; VM will autostart on next unflush/ready of current node'.format(dom_uuid), state='i')
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zkhandler.writedata(zk_conn, {
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'/domains/{}/state'.format(dom_uuid): 'stopped',
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'/domains/{}/node_autostart'.format(dom_uuid): 'True'
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zkhandler.write({
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('/domains/{}/state'.format(dom_uuid), 'stopped'),
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('/domains/{}/node_autostart'.format(dom_uuid), 'True')
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})
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# Loop through the VMs
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@ -110,7 +115,9 @@ def migrateFromFencedNode(zk_conn, node_name, config, logger):
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fence_migrate_vm(dom_uuid)
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# Set node in flushed state for easy remigrating when it comes back
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zkhandler.writedata(zk_conn, {'/nodes/{}/domainstate'.format(node_name): 'flushed'})
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zkhandler.write([
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('/nodes/{}/domainstate'.format(node_name), 'flushed')
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])
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#
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