From caf81bafc6132d79674f4c31bbd22d97f4aee961 Mon Sep 17 00:00:00 2001
From: JingLu5 <lvjing5@huawei.com>
Date: Fri, 13 Jan 2017 14:48:25 +0000
Subject: New reliability/availability testcase - IP datagram error rate and
 etc.

JIRA: YARDSTICK-534

This test case uses nstat to monitor network metrics provided by the kernel in
a host and calculate IP datagram error rate, ICMP message error rate, TCP
segment error rate and UDP datagram error rate.

Change-Id: I2fe6457bb5c95d0446c1463991ae31cc664b09f8
Signed-off-by: JingLu5 <lvjing5@huawei.com>
---
 yardstick/benchmark/scenarios/networking/nstat.py | 130 ++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 yardstick/benchmark/scenarios/networking/nstat.py

(limited to 'yardstick/benchmark/scenarios')

diff --git a/yardstick/benchmark/scenarios/networking/nstat.py b/yardstick/benchmark/scenarios/networking/nstat.py
new file mode 100644
index 000000000..df96dbda7
--- /dev/null
+++ b/yardstick/benchmark/scenarios/networking/nstat.py
@@ -0,0 +1,130 @@
+##############################################################################
+# Copyright (c) 2017 Huawei Technologies Co.,Ltd and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+from __future__ import print_function
+from __future__ import absolute_import
+
+import time
+import logging
+
+import yardstick.ssh as ssh
+from yardstick.benchmark.scenarios import base
+
+LOG = logging.getLogger(__name__)
+
+PRECISION = 3
+
+
+class Nstat(base.Scenario):
+    """Use nstat to monitor network metrics and measure IP datagram error rate
+    and etc.
+    """
+
+    __scenario_type__ = "Nstat"
+
+    def __init__(self, scenario_cfg, context_cfg):
+        """Scenario construction"""
+        self.scenario_cfg = scenario_cfg
+        self.context_cfg = context_cfg
+        self.setup_done = False
+
+    def setup(self):
+        """scenario setup"""
+        host = self.context_cfg["host"]
+        user = host.get("user", "ubuntu")
+        ssh_port = host.get("ssh_port", ssh.DEFAULT_PORT)
+        ip = host.get("ip", None)
+        key_filename = host.get('key_filename', "~/.ssh/id_rsa")
+
+        LOG.info("user:%s, host:%s", user, ip)
+        self.client = ssh.SSH(user, ip, key_filename=key_filename,
+                              port=ssh_port)
+        self.client.wait(timeout=600)
+
+        self.setup_done = True
+
+    def match(self, key, field, line, results):
+        """match data in the output"""
+        if key in line:
+            results[key] = int(line.split()[field])
+
+    def calculate_error_rate(self, x, y):
+        """calculate error rate"""
+        try:
+            return round(float(x) / float(y), PRECISION)
+        except ZeroDivisionError:
+            # If incoming Errors is non-zero, but incoming data is zero
+            # consider it as 100% error rate
+            if x:
+                return 1
+            else:
+                return 0
+
+    def process_output(self, out):
+        """process output"""
+        results = {}
+        for line in out.splitlines():
+            self.match('IpInReceives', 1, line, results)
+            self.match('IpInHdrErrors', 1, line, results)
+            self.match('IpInAddrErrors', 1, line, results)
+            self.match('IcmpInMsgs', 1, line, results)
+            self.match('IcmpInErrors', 1, line, results)
+            self.match('TcpInSegs', 1, line, results)
+            self.match('TcpInErrs', 1, line, results)
+            self.match('UdpInDatagrams', 1, line, results)
+            self.match('UdpInErrors', 1, line, results)
+        results['IpErrors'] = \
+            results['IpInHdrErrors'] + results['IpInAddrErrors']
+        results['IP_datagram_error_rate'] = \
+            self.calculate_error_rate(results['IpErrors'],
+                                      results['IpInReceives'])
+        results['Icmp_message_error_rate'] = \
+            self.calculate_error_rate(results['IcmpInErrors'],
+                                      results['IcmpInMsgs'])
+        results['Tcp_segment_error_rate'] = \
+            self.calculate_error_rate(results['TcpInErrs'],
+                                      results['TcpInSegs'])
+        results['Udp_datagram_error_rate'] = \
+            self.calculate_error_rate(results['UdpInErrors'],
+                                      results['UdpInDatagrams'])
+        return results
+
+    def run(self, result):
+        """execute the benchmark"""
+
+        if not self.setup_done:
+            self.setup()
+
+        options = self.scenario_cfg['options']
+        duration = options.get('duration', 60)
+
+        time.sleep(duration)
+
+        cmd = "nstat -z"
+
+        LOG.debug("Executing command: %s", cmd)
+        status, stdout, stderr = self.client.execute(cmd)
+
+        if status:
+            raise RuntimeError(stderr)
+
+        results = self.process_output(stdout)
+
+        result.update(results)
+
+        if "sla" in self.scenario_cfg:
+            sla_error = ""
+            for i, rate in result.items():
+                if i not in self.scenario_cfg['sla']:
+                    continue
+                sla_rate = float(self.scenario_cfg['sla'][i])
+                rate = float(rate)
+                if rate > sla_rate:
+                    sla_error += "%s rate %f > sla:%s_rate(%f); " % \
+                        (i, rate, i, sla_rate)
+            assert sla_error == "", sla_error
-- 
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