Add km module kafka

tests/kafkatest/services/trogdor/kibosh.py

@@ -0,0 +1,156 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json
+import os.path
+
+from ducktape.services.service import Service
+from ducktape.utils import util
+
+
+class KiboshService(Service):
+    """
+    Kibosh is a fault-injecting FUSE filesystem.
+
+    Attributes:
+        INSTALL_ROOT                    The path of where Kibosh is installed.
+        BINARY_NAME                     The Kibosh binary name.
+        BINARY_PATH                     The path to the kibosh binary.
+    """
+    INSTALL_ROOT = "/opt/kibosh/build"
+    BINARY_NAME = "kibosh"
+    BINARY_PATH = os.path.join(INSTALL_ROOT, BINARY_NAME)
+
+    def __init__(self, context, nodes, target, mirror, persist="/mnt/kibosh"):
+        """
+        Create a Kibosh service.
+
+        :param context:             The TestContext object.
+        :param nodes:               The nodes to put the Kibosh FS on.  Kibosh allocates no
+                                    nodes of its own.
+        :param target:              The target directory, which Kibosh exports a view of.
+        :param mirror:              The mirror directory, where Kibosh injects faults.
+        :param persist:             Where the log files and pid files will be created.
+        """
+        Service.__init__(self, context, num_nodes=0)
+        if (len(nodes) == 0):
+            raise RuntimeError("You must supply at least one node to run the service on.")
+        for node in nodes:
+            self.nodes.append(node)
+
+        self.target = target
+        self.mirror = mirror
+        self.persist = persist
+
+        self.control_path = os.path.join(self.mirror, "kibosh_control")
+        self.pidfile_path = os.path.join(self.persist, "pidfile")
+        self.stdout_stderr_path = os.path.join(self.persist, "kibosh-stdout-stderr.log")
+        self.log_path = os.path.join(self.persist, "kibosh.log")
+        self.logs = {
+            "kibosh-stdout-stderr.log": {
+                "path": self.stdout_stderr_path,
+                "collect_default": True},
+            "kibosh.log": {
+                "path": self.log_path,
+                "collect_default": True}
+        }
+
+    def free(self):
+        """Clear the nodes list."""
+        # Because the filesystem runs on nodes which have been allocated by other services, those nodes
+        # are not deallocated here.
+        self.nodes = []
+        Service.free(self)
+
+    def kibosh_running(self, node):
+        return 0 == node.account.ssh("test -e '%s'" % self.control_path, allow_fail=True)
+
+    def start_node(self, node):
+        node.account.mkdirs(self.persist)
+        cmd = "sudo -E "
+        cmd += " %s" % KiboshService.BINARY_PATH
+        cmd += " --target %s" % self.target
+        cmd += " --pidfile %s" % self.pidfile_path
+        cmd += " --log %s" % self.log_path
+        cmd += " --control-mode 666"
+        cmd += " --verbose"
+        cmd += " %s" % self.mirror
+        cmd += " &> %s" % self.stdout_stderr_path
+        node.account.ssh(cmd)
+        util.wait_until(lambda: self.kibosh_running(node), 20, backoff_sec=.1,
+                        err_msg="Timed out waiting for kibosh to start on %s" % node.account.hostname)
+
+    def pids(self, node):
+        return [pid for pid in node.account.ssh_capture("test -e '%s' && test -e /proc/$(cat '%s')" %
+                                                        (self.pidfile_path, self.pidfile_path), allow_fail=True)]
+
+    def wait_node(self, node, timeout_sec=None):
+        return len(self.pids(node)) == 0
+
+    def kibosh_process_running(self, node):
+        pids = self.pids(node)
+        if len(pids) == 0:
+            return True
+        return False
+
+    def stop_node(self, node):
+        """Halt kibosh process(es) on this node."""
+        node.account.logger.debug("stop_node(%s): unmounting %s" % (node.name, self.mirror))
+        node.account.ssh("sudo fusermount -u %s" % self.mirror, allow_fail=True)
+        # Wait for the kibosh process to terminate.
+        try:
+            util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1,
+                            err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname)
+        except TimeoutError:
+            # If the process won't terminate, use kill -9 to shut it down.
+            node.account.logger.debug("stop_node(%s): killing the kibosh process managing %s" % (node.name, self.mirror))
+            node.account.ssh("sudo kill -9 %s" % (" ".join(self.pids(node))), allow_fail=True)
+            node.account.ssh("sudo fusermount -u %s" % self.mirror)
+            util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1,
+                            err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname)
+
+    def clean_node(self, node):
+        """Clean up persistent state on this node - e.g. service logs, configuration files etc."""
+        self.stop_node(node)
+        node.account.ssh("rm -rf -- %s" % self.persist)
+
+    def set_faults(self, node, specs):
+        """
+        Set the currently active faults.
+
+        :param node:        The node.
+        :param spec:        An array of FaultSpec objects describing the faults.
+        """
+        if len(specs) == 0:
+            obj_json = "{}"
+        else:
+            fault_array = [spec.kibosh_message for spec in specs]
+            obj = { 'faults': fault_array }
+            obj_json = json.dumps(obj)
+        node.account.create_file(self.control_path, obj_json)
+
+    def get_fault_json(self, node):
+        """
+        Return a JSON string which contains the currently active faults.
+
+        :param node:        The node.
+
+        :returns:           The fault JSON describing the faults.
+        """
+        iter = node.account.ssh_capture("cat '%s'" % self.control_path)
+        text = ""
+        for line in iter:
+            text = "%s%s" % (text, line.rstrip("\r\n"))
+        return text