Reformat code with Black code formatter
Unify the code style along PEP and Black principles using the tool.
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@ -35,74 +35,89 @@ def fence_node(node_name, zkhandler, config, logger):
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failcount = 0
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while failcount < failcount_limit:
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# Wait 5 seconds
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time.sleep(config['keepalive_interval'])
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time.sleep(config["keepalive_interval"])
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# Get the state
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node_daemon_state = zkhandler.read(('node.state.daemon', node_name))
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node_daemon_state = zkhandler.read(("node.state.daemon", node_name))
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# Is it still 'dead'
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if node_daemon_state == 'dead':
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if node_daemon_state == "dead":
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failcount += 1
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logger.out('Node "{}" failed {}/{} saving throws'.format(node_name, failcount, failcount_limit), state='s')
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logger.out(
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'Node "{}" failed {}/{} saving throws'.format(
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node_name, failcount, failcount_limit
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),
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state="s",
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)
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# It changed back to something else so it must be alive
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else:
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logger.out('Node "{}" passed a saving throw; canceling fence'.format(node_name), state='o')
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logger.out(
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'Node "{}" passed a saving throw; canceling fence'.format(node_name),
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state="o",
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)
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return
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logger.out('Fencing node "{}" via IPMI reboot signal'.format(node_name), state='s')
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logger.out('Fencing node "{}" via IPMI reboot signal'.format(node_name), state="s")
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# Get IPMI information
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ipmi_hostname = zkhandler.read(('node.ipmi.hostname', node_name))
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ipmi_username = zkhandler.read(('node.ipmi.username', node_name))
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ipmi_password = zkhandler.read(('node.ipmi.password', node_name))
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ipmi_hostname = zkhandler.read(("node.ipmi.hostname", node_name))
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ipmi_username = zkhandler.read(("node.ipmi.username", node_name))
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ipmi_password = zkhandler.read(("node.ipmi.password", node_name))
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# Shoot it in the head
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fence_status = reboot_via_ipmi(ipmi_hostname, ipmi_username, ipmi_password, logger)
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# Hold to ensure the fence takes effect and system stabilizes
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logger.out('Waiting {}s for fence of node "{}" to take effect'.format(config['keepalive_interval'], node_name), state='i')
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time.sleep(config['keepalive_interval'])
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logger.out(
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'Waiting {}s for fence of node "{}" to take effect'.format(
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config["keepalive_interval"], node_name
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),
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state="i",
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)
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time.sleep(config["keepalive_interval"])
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if fence_status:
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logger.out('Marking node "{}" as fenced'.format(node_name), state='i')
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logger.out('Marking node "{}" as fenced'.format(node_name), state="i")
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while True:
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try:
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zkhandler.write([
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(('node.state.daemon', node_name), 'fenced')
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])
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zkhandler.write([(("node.state.daemon", node_name), "fenced")])
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break
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except Exception:
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continue
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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.write([
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(('node.state.router', node_name), 'secondary')
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])
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if zkhandler.read('base.config.primary_node') == node_name:
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zkhandler.write([
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('base.config.primary_node', 'none')
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])
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if node_name in config["coordinators"]:
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logger.out(
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'Forcing secondary status for node "{}"'.format(node_name), state="i"
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)
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zkhandler.write([(("node.state.router", node_name), "secondary")])
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if zkhandler.read("base.config.primary_node") == node_name:
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zkhandler.write([("base.config.primary_node", "none")])
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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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if fence_status and config["successful_fence"] == "migrate":
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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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if (
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not fence_status
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and config["failed_fence"] == "migrate"
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and config["suicide_intervals"] != "0"
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):
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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(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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logger.out(
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'Migrating VMs from dead node "{}" to new hosts'.format(node_name), state="i"
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)
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# Get the list of VMs
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dead_node_running_domains = zkhandler.read(('node.running_domains', node_name)).split()
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dead_node_running_domains = zkhandler.read(
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("node.running_domains", node_name)
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).split()
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# Set the node to a custom domainstate so we know what's happening
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zkhandler.write([
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(('node.state.domain', node_name), 'fence-flush')
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])
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zkhandler.write([(("node.state.domain", node_name), "fence-flush")])
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# Migrate a VM after a flush
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def fence_migrate_vm(dom_uuid):
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@ -111,28 +126,40 @@ def migrateFromFencedNode(zkhandler, node_name, config, logger):
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target_node = common.findTargetNode(zkhandler, 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.write([
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(('domain.state', dom_uuid), 'start'),
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(('domain.node', dom_uuid), target_node),
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(('domain.last_node', dom_uuid), node_name),
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])
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logger.out(
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'Migrating VM "{}" to node "{}"'.format(dom_uuid, target_node),
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state="i",
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)
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zkhandler.write(
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[
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(("domain.state", dom_uuid), "start"),
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(("domain.node", dom_uuid), target_node),
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(("domain.last_node", dom_uuid), node_name),
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]
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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.write({
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(('domain.state', dom_uuid), 'stopped'),
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(('domain.meta.autostart', dom_uuid), 'True'),
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})
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logger.out(
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'No target node found for VM "{}"; VM will autostart on next unflush/ready of current node'.format(
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dom_uuid
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),
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state="i",
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)
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zkhandler.write(
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{
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(("domain.state", dom_uuid), "stopped"),
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(("domain.meta.autostart", dom_uuid), "True"),
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}
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)
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# Loop through the VMs
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for dom_uuid in dead_node_running_domains:
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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.write([
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(('node.state.domain', node_name), 'flushed')
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])
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logger.out('All VMs flushed from dead node "{}" to new hosts'.format(node_name), state='i')
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zkhandler.write([(("node.state.domain", node_name), "flushed")])
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logger.out(
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'All VMs flushed from dead node "{}" to new hosts'.format(node_name), state="i"
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)
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#
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@ -140,68 +167,100 @@ def migrateFromFencedNode(zkhandler, node_name, config, logger):
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#
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def reboot_via_ipmi(ipmi_hostname, ipmi_user, ipmi_password, logger):
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# Power off the node the node
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logger.out('Sending power off to dead node', state='i')
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ipmi_command_stop = '/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power off'.format(
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ipmi_hostname, ipmi_user, ipmi_password
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logger.out("Sending power off to dead node", state="i")
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ipmi_command_stop = (
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"/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power off".format(
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ipmi_hostname, ipmi_user, ipmi_password
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)
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)
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ipmi_stop_retcode, ipmi_stop_stdout, ipmi_stop_stderr = common.run_os_command(
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ipmi_command_stop
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)
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ipmi_stop_retcode, ipmi_stop_stdout, ipmi_stop_stderr = common.run_os_command(ipmi_command_stop)
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if ipmi_stop_retcode != 0:
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logger.out(f'Failed to power off dead node: {ipmi_stop_stderr}', state='e')
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logger.out(f"Failed to power off dead node: {ipmi_stop_stderr}", state="e")
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time.sleep(5)
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# Check the chassis power state
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logger.out('Checking power state of dead node', state='i')
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ipmi_command_status = '/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power status'.format(
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ipmi_hostname, ipmi_user, ipmi_password
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logger.out("Checking power state of dead node", state="i")
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ipmi_command_status = (
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"/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power status".format(
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ipmi_hostname, ipmi_user, ipmi_password
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)
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)
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ipmi_status_retcode, ipmi_status_stdout, ipmi_status_stderr = common.run_os_command(
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ipmi_command_status
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)
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ipmi_status_retcode, ipmi_status_stdout, ipmi_status_stderr = common.run_os_command(ipmi_command_status)
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if ipmi_status_retcode == 0:
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logger.out(f'Current chassis power state is: {ipmi_status_stdout.strip()}', state='i')
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logger.out(
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f"Current chassis power state is: {ipmi_status_stdout.strip()}", state="i"
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)
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else:
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logger.out(f'Current chassis power state is: Unknown', state='w')
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logger.out(f"Current chassis power state is: Unknown", state="w")
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# Power on the node
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logger.out('Sending power on to dead node', state='i')
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ipmi_command_start = '/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power on'.format(
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ipmi_hostname, ipmi_user, ipmi_password
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logger.out("Sending power on to dead node", state="i")
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ipmi_command_start = (
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"/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power on".format(
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ipmi_hostname, ipmi_user, ipmi_password
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)
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)
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ipmi_start_retcode, ipmi_start_stdout, ipmi_start_stderr = common.run_os_command(
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ipmi_command_start
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)
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ipmi_start_retcode, ipmi_start_stdout, ipmi_start_stderr = common.run_os_command(ipmi_command_start)
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if ipmi_start_retcode != 0:
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logger.out(f'Failed to power on dead node: {ipmi_start_stderr}', state='w')
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logger.out(f"Failed to power on dead node: {ipmi_start_stderr}", state="w")
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time.sleep(2)
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# Check the chassis power state
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logger.out('Checking power state of dead node', state='i')
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ipmi_command_status = '/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power status'.format(
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ipmi_hostname, ipmi_user, ipmi_password
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logger.out("Checking power state of dead node", state="i")
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ipmi_command_status = (
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"/usr/bin/ipmitool -I lanplus -H {} -U {} -P {} chassis power status".format(
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ipmi_hostname, ipmi_user, ipmi_password
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)
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)
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ipmi_status_retcode, ipmi_status_stdout, ipmi_status_stderr = common.run_os_command(
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ipmi_command_status
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)
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ipmi_status_retcode, ipmi_status_stdout, ipmi_status_stderr = common.run_os_command(ipmi_command_status)
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if ipmi_stop_retcode == 0:
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if ipmi_status_stdout.strip() == "Chassis Power is on":
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# We successfully rebooted the node and it is powered on; this is a succeessful fence
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logger.out('Successfully rebooted dead node', state='o')
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logger.out("Successfully rebooted dead node", state="o")
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return True
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elif ipmi_status_stdout.strip() == "Chassis Power is off":
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# We successfully rebooted the node but it is powered off; this might be expected or not, but the node is confirmed off so we can call it a successful fence
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logger.out('Chassis power is in confirmed off state after successfuly IPMI reboot; proceeding with fence-flush', state='o')
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logger.out(
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"Chassis power is in confirmed off state after successfuly IPMI reboot; proceeding with fence-flush",
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state="o",
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)
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return True
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else:
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# We successfully rebooted the node but it is in some unknown power state; since this might indicate a silent failure, we must call it a failed fence
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logger.out('Chassis power is in an unknown state ({}) after successful IPMI reboot; not performing fence-flush'.format(ipmi_status_stdout.strip()), state='e')
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logger.out(
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"Chassis power is in an unknown state ({}) after successful IPMI reboot; not performing fence-flush".format(
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ipmi_status_stdout.strip()
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),
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state="e",
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)
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return False
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else:
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if ipmi_status_stdout.strip() == "Chassis Power is off":
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# We failed to reboot the node but it is powered off; it has probably suffered a serious hardware failure, but the node is confirmed off so we can call it a successful fence
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logger.out('Chassis power is in confirmed off state after failed IPMI reboot; proceeding with fence-flush', state='o')
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logger.out(
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"Chassis power is in confirmed off state after failed IPMI reboot; proceeding with fence-flush",
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state="o",
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)
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return True
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else:
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# We failed to reboot the node but it is in some unknown power state (including "on"); since this might indicate a silent failure, we must call it a failed fence
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logger.out('Chassis power is not in confirmed off state after failed IPMI reboot; not performing fence-flush', state='e')
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logger.out(
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"Chassis power is not in confirmed off state after failed IPMI reboot; not performing fence-flush",
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state="e",
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)
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return False
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@ -209,7 +268,7 @@ def reboot_via_ipmi(ipmi_hostname, ipmi_user, ipmi_password, logger):
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# Verify that IPMI connectivity to this host exists (used during node init)
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#
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def verify_ipmi(ipmi_hostname, ipmi_user, ipmi_password):
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ipmi_command = f'/usr/bin/ipmitool -I lanplus -H {ipmi_hostname} -U {ipmi_user} -P {ipmi_password} chassis power status'
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ipmi_command = f"/usr/bin/ipmitool -I lanplus -H {ipmi_hostname} -U {ipmi_user} -P {ipmi_password} chassis power status"
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retcode, stdout, stderr = common.run_os_command(ipmi_command, timeout=2)
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if retcode == 0 and stdout.strip() == "Chassis Power is on":
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return True
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