def stonith(node):
p_cfg = PacemakerConfig()
# TODO: signal that manager that a STONITH has been done so that it
# doesn't treat it as an AWOL
console_log.info("Rebooting %s per a STONITH request" % node)
p_cfg.get_node(node).fence_reboot()
def configure_fencing(agents):
pc = PacemakerConfig()
node = pc.get_node(socket.gethostname())
node.clear_fence_attributes()
if isinstance(agents, basestring):
# For CLI debugging
agents = json.loads(agents)
for idx, agent in enumerate(agents):
node.set_fence_attributes(idx, agent)
pc.create_update_properyset("cib-bootstrap-options",
{"stonith-enabled": "true"})
def _configure_pacemaker():
'''
Configure pacemaker if this node is the dc.
:return: agent_ok if no error else returns an agent_error
'''
pc = PacemakerConfig()
timeout_time = time.time() + PACEMAKER_CONFIGURE_TIMEOUT
error = None
while (pc.configured is False) and (time.time() < timeout_time):
if pc.is_dc:
daemon_log.info(
'Configuring (global) pacemaker configuration because I am the DC'
)
error = _do_configure_pacemaker(pc)
if error:
return agent_error(error)
else:
daemon_log.info(
'Not configuring (global) pacemaker configuration because I am not the DC'
)
time.sleep(10)
if pc.configured is False:
error = 'Failed to configure (global) pacemaker configuration dc=%s' % pc.dc
return agent_ok_or_error(error)
def test_finding_fenceable_nodes(self):
self.reset_command_capture()
self.add_command(('cibadmin', '--query', '--local'))
# Not strictly an agent test, but the tested method is used by
# the agent to generate the -o list output.
from chroma_agent.lib.pacemaker import PacemakerConfig
p_cfg = PacemakerConfig()
self.assertEqual(len(p_cfg.fenceable_nodes), 1)
self.assertRanAllCommandsInOrder()
def set_node_online(node):
pc = PacemakerConfig()
node = pc.get_node(node)
node.disable_standby()
def set_node_standby(node):
pc = PacemakerConfig()
node = pc.get_node(node)
node.enable_standby()
def main(args=None):
configure_logging()
VALID_ACTIONS = ["off", "on", "reboot", "metadata", "list", "monitor"]
epilog = """
With no command line argument, arguments are read from standard input.
Arguments read from standard input take the form of:
arg1=value1
arg2=value2
action Action to perform (%s)
port Name of node on which to perform action
""" % ", ".join(VALID_ACTIONS)
parser = ArgumentParser(description="Chroma Fence Agent",
formatter_class=RawDescriptionHelpFormatter,
epilog=epilog)
parser.add_argument("-o",
"--option",
"--action",
dest="action",
choices=VALID_ACTIONS)
parser.add_argument("-n",
"--plug",
"--nodename",
"--port",
dest="port",
help="Name of node on which to perform action")
ns = parser.parse_args(args)
if not ns.action and not ns.port:
ns = parser.parse_args(stdin_to_args())
if ns.action == "metadata":
print """<?xml version="1.0" ?>
<resource-agent name="fence_chroma" shortdesc="Fence agent for Integrated Manager for Lustre software Storage Servers">
<longdesc>fence_chroma is an I/O Fencing agent which can be used with Integrated Manager for Lustre software Storage Servers.</longdesc>
<vendor-url>http://www.whamcloud.com</vendor-url>
<parameters>
<parameter name="port">
<getopt mixed="-p" />
<content type="string" />
<shortdesc lang="en">Storage Server (machine name) to fence</shortdesc>
</parameter>
<parameter name="action">
<getopt mixed="-o" />
<content type="string" />
<shortdesc lang="en">Fencing action (%s)</shortdesc>
</parameter>
</parameters>
<actions>
<action name="reboot" />
<action name="off" />
<action name="on" />
<action name="metadata" />
<action name="list" />
<action name="monitor" />
</actions>
</resource-agent>
""" % ", ".join(VALID_ACTIONS)
elif ns.action in ["on", "off"]:
node = PacemakerConfig().get_node(ns.port)
getattr(node, "fence_%s" % ns.action)()
elif ns.action == "reboot":
manage_node.stonith(ns.port)
elif ns.action == "list":
for node in PacemakerConfig().fenceable_nodes:
print "%s," % node.name
elif ns.action == "monitor":
# TODO: What does "monitor" mean for this agent? We have to have it
# to keep pacemaker happy, but longer-term it might make sense to
# make this a meta-monitor, in that it invokes the monitor action for
# all sub-agents and aggregates the results.
sys.exit(0)
else:
# Supposedly impossible to get here with argparse, but one never
# knows...
raise RuntimeError("Invalid action: %s" % ns.action)
