2.16.2.28. Yardstick Test Case Description TC076

Monitor Network Metrics
test case id OPNFV_YARDSTICK_TC076_Monitor_Network_Metrics
metric IP datagram error rate, ICMP message error rate, TCP segment error rate and UDP datagram error rate
test purpose

The purpose of TC076 is to evaluate the IaaS network reliability with regards to IP datagram error rate, ICMP message error rate, TCP segment error rate and UDP datagram error rate.

TC076 monitors network metrics provided by the Linux kernel in a host and calculates IP datagram error rate, ICMP message error rate, TCP segment error rate and UDP datagram error rate.

The purpose is also to be able to spot the trends. Test results, graphs and similar shall be stored for comparison reasons and product evolution understanding between different OPNFV versions and/or configurations.

test tool

nstat

nstat is a simple tool to monitor kernel snmp counters and network interface statistics.

(nstat is not always part of a Linux distribution, hence it needs to be installed. nstat is provided by the iproute2 collection, which is usually also the name of the package in many Linux distributions.As an example see the /yardstick/tools/ directory for how to generate a Linux image with iproute2 included.)

test description

Ping packets (ICMP protocol’s mandatory ECHO_REQUEST datagram) are sent from host VM to target VM(s) to elicit ICMP ECHO_RESPONSE.

nstat is invoked on the target vm to monitors network metrics provided by the Linux kernel.

configuration

file: opnfv_yardstick_tc076.yaml

There is no additional configuration to be set for this TC.

references

nstat man page

ETSI-NFV-TST001

applicability This test case is mainly for monitoring network metrics.
pre_test conditions

The test case image needs to be installed into Glance with fio included in it.

No POD specific requirements have been identified.

test sequence description and expected result
step 1 Two host VMs are booted, as server and client.
step 2 Yardstick is connected with the server VM by using ssh. ‘ping_benchmark’ bash script is copyied from Jump Host to the server VM via the ssh tunnel.
step 3

Ping is invoked. Ping packets are sent from server VM to client VM. RTT results are calculated and checked against the SLA. nstat is invoked on the client vm to monitors network metrics provided by the Linux kernel. IP datagram error rate, ICMP message error rate, TCP segment error rate and UDP datagram error rate are calculated. Logs are produced and stored.

Result: Logs are stored.

step 4 Two host VMs are deleted.
test verdict None.