mirror of https://github.com/apache/kafka.git
154 lines
6.4 KiB
Python
154 lines
6.4 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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import os.path
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from ducktape.services.service import Service
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from ducktape.utils import util
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class KiboshService(Service):
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"""
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Kibosh is a fault-injecting FUSE filesystem.
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Attributes:
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INSTALL_ROOT The path of where Kibosh is installed.
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BINARY_NAME The Kibosh binary name.
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BINARY_PATH The path to the kibosh binary.
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"""
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INSTALL_ROOT = "/opt/kibosh/build"
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BINARY_NAME = "kibosh"
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BINARY_PATH = os.path.join(INSTALL_ROOT, BINARY_NAME)
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def __init__(self, context, nodes, target, mirror, persist="/mnt/kibosh"):
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"""
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Create a Kibosh service.
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:param context: The TestContext object.
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:param nodes: The nodes to put the Kibosh FS on. Kibosh allocates no
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nodes of its own.
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:param target: The target directory, which Kibosh exports a view of.
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:param mirror: The mirror directory, where Kibosh injects faults.
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:param persist: Where the log files and pid files will be created.
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"""
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Service.__init__(self, context, num_nodes=0)
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if (len(nodes) == 0):
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raise RuntimeError("You must supply at least one node to run the service on.")
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for node in nodes:
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self.nodes.append(node)
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self.target = target
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self.mirror = mirror
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self.persist = persist
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self.control_path = os.path.join(self.mirror, "kibosh_control")
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self.pidfile_path = os.path.join(self.persist, "pidfile")
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self.stdout_stderr_path = os.path.join(self.persist, "kibosh-stdout-stderr.log")
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self.log_path = os.path.join(self.persist, "kibosh.log")
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self.logs = {
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"kibosh-stdout-stderr.log": {
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"path": self.stdout_stderr_path,
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"collect_default": True},
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"kibosh.log": {
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"path": self.log_path,
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"collect_default": True}
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}
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def free(self):
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"""Clear the nodes list."""
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# Because the filesystem runs on nodes which have been allocated by other services, those nodes
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# are not deallocated here.
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self.nodes = []
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Service.free(self)
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def kibosh_running(self, node):
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return 0 == node.account.ssh("test -e '%s'" % self.control_path, allow_fail=True)
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def start_node(self, node):
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node.account.mkdirs(self.persist)
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cmd = "sudo -E "
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cmd += " %s" % KiboshService.BINARY_PATH
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cmd += " --target %s" % self.target
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cmd += " --pidfile %s" % self.pidfile_path
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cmd += " --log %s" % self.log_path
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cmd += " --control-mode 666"
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cmd += " --verbose"
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cmd += " %s" % self.mirror
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cmd += " &> %s" % self.stdout_stderr_path
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node.account.ssh(cmd)
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util.wait_until(lambda: self.kibosh_running(node), 20, backoff_sec=.1,
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err_msg="Timed out waiting for kibosh to start on %s" % node.account.hostname)
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def pids(self, node):
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return [pid for pid in node.account.ssh_capture("test -e '%s' && test -e /proc/$(cat '%s')" %
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(self.pidfile_path, self.pidfile_path), allow_fail=True)]
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def wait_node(self, node, timeout_sec=None):
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return len(self.pids(node)) == 0
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def kibosh_process_running(self, node):
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pids = self.pids(node)
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if len(pids) == 0:
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return True
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return False
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def stop_node(self, node):
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"""Halt kibosh process(es) on this node."""
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node.account.logger.debug("stop_node(%s): unmounting %s" % (node.name, self.mirror))
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node.account.ssh("sudo fusermount -u %s" % self.mirror, allow_fail=True)
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# Wait for the kibosh process to terminate.
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try:
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util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1,
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err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname)
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except TimeoutError:
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# If the process won't terminate, use kill -9 to shut it down.
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node.account.logger.debug("stop_node(%s): killing the kibosh process managing %s" % (node.name, self.mirror))
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node.account.ssh("sudo kill -9 %s" % (" ".join(self.pids(node))), allow_fail=True)
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node.account.ssh("sudo fusermount -u %s" % self.mirror)
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util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1,
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err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname)
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def clean_node(self, node):
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"""Clean up persistent state on this node - e.g. service logs, configuration files etc."""
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self.stop_node(node)
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node.account.ssh("rm -rf -- %s" % self.persist)
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def set_faults(self, node, specs):
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"""
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Set the currently active faults.
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:param node: The node.
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:param spec: An array of FaultSpec objects describing the faults.
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"""
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fault_array = [spec.kibosh_message() for spec in specs]
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obj = { 'faults': fault_array }
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obj_json = json.dumps(obj)
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node.account.create_file(self.control_path, obj_json)
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def get_fault_json(self, node):
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"""
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Return a JSON string which contains the currently active faults.
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:param node: The node.
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:returns: The fault JSON describing the faults.
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"""
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iter = node.account.ssh_capture("cat '%s'" % self.control_path)
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text = ""
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for line in iter:
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text = "%s%s" % (text, line.rstrip("\r\n"))
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return text
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