--- /dev/null
+.. This work is licensed under a Creative Commons Attribution 4.0 International
+.. License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) OPNFV, Ericsson and others.
+
+*************************************
+Yardstick Test Case Description TC087
+*************************************
+
++-----------------------------------------------------------------------------+
+|SDN Controller resilience in non-HA configuration |
+| |
++--------------+--------------------------------------------------------------+
+|test case id | OPNFV_YARDSTICK_TC087: SDN controller resilience in |
+| | non-HA configuration |
+| | |
++--------------+--------------------------------------------------------------+
+|test purpose | This test validates that network data plane services are |
+| | highly available in the event of an SDN Controller failure, |
+| | even if the SDN controller is deployed in a non-HA |
+| | configuration. Specifically, the test verifies that |
+| | existing data plane connectivity is not impacted, i.e. all |
+| | configured network services such as DHCP, ARP, L2, |
+| | L3 Security Groups should continue to operate |
+| | between the existing VMs while the SDN controller is |
+| | offline or rebooting. |
+| | |
+| | The test also validates that new network service operations |
+| | (creating a new VM in the existing L2/L3 network or in a new |
+| | network, etc.) are operational after the SDN controller |
+| | has recovered from a failure. |
+| | |
++--------------+--------------------------------------------------------------+
+|test method | This test case fails the SDN controller service running |
+| | on the OpenStack controller node, then checks if already |
+| | configured DHCP/ARP/L2/L3/SNAT connectivity is not |
+| | impacted between VMs and the system is able to execute |
+| | new virtual network operations once the SDN controller |
+| | is restarted and has fully recovered |
+| | |
++--------------+--------------------------------------------------------------+
+|attackers | In this test case, an attacker called “kill-process” is |
+| | needed. This attacker includes three parameters: |
+| | 1. fault_type: which is used for finding the attacker's |
+| | scripts. It should be set to 'kill-process' in this test |
+| | |
+| | 2. process_name: should be set to the name of the SDN |
+| | controller process |
+| | |
+| | 3. host: which is the name of a control node where the |
+| | SDN controller process is running |
+| | |
+| | e.g. -fault_type: "kill-process" |
+| | -process_name: "opendaylight" |
+| | -host: node1 |
+| | |
++--------------+--------------------------------------------------------------+
+|monitors | This test case utilizes two monitors of type "ip-status" |
+| | and one monitor of type "process" to track the following |
+| | conditions: |
+| | 1. "ping_same_network_l2": monitor ICMP traffic between |
+| | VMs in the same Neutron network |
+| | |
+| | 2. "ping_external_snat": monitor ICMP traffic from VMs to |
+| | an external host on the Internet to verify SNAT |
+| | functionality. |
+| | |
+| | 3. "SDN controller process monitor": a monitor checking the |
+| | state of a specified SDN controller process. It measures |
+| | the recovery time of the given process. |
+| | |
+| | Monitors of type "ip-status" use the "ping" utility to |
+| | verify reachability of a given target IP. |
+| | |
++--------------+--------------------------------------------------------------+
+|operations | In this test case, the following operations are needed: |
+| | 1. "nova-create-instance-in_network": create a VM instance |
+| | in one of the existing Neutron network. |
+| | |
++--------------+--------------------------------------------------------------+
+|metrics | In this test case, there are two metrics: |
+| | 1. process_recover_time: which indicates the maximun |
+| | time (seconds) from the process being killed to |
+| | recovered |
+| | |
+| | 2. packet_drop: measure the packets that have been dropped |
+| | by the monitors using pktgen. |
+| | |
++--------------+--------------------------------------------------------------+
+|test tool | Developed by the project. Please see folder: |
+| | "yardstick/benchmark/scenarios/availability/ha_tools" |
+| | |
++--------------+--------------------------------------------------------------+
+|references | none |
+| | |
++--------------+--------------------------------------------------------------+
+|configuration | This test case needs two configuration files: |
+| | 1. test case file: opnfv_yardstick_tc087.yaml |
+| | - Attackers: see above “attackers” discription |
+| | - waiting_time: which is the time (seconds) from the |
+| | process being killed to stoping monitors the monitors |
+| | - Monitors: see above “monitors” discription |
+| | - SLA: see above “metrics” discription |
+| | |
+| | 2. POD file: pod.yaml The POD configuration should record |
+| | on pod.yaml first. the “host” item in this test case |
+| | will use the node name in the pod.yaml. |
+| | |
++--------------+--------------------------------------------------------------+
+|test sequence | Description and expected result |
+| | |
++--------------+--------------------------------------------------------------+
+|pre-action | 1. The OpenStack cluster is set up with a single SDN |
+| | controller in a non-HA configuration. |
+| | |
+| | 2. One or more Neutron networks are created with two or |
+| | more VMs attached to each of the Neutron networks. |
+| | |
+| | 3. The Neutron networks are attached to a Neutron router |
+| | which is attached to an external network towards the |
+| | DCGW. |
+| | |
++--------------+--------------------------------------------------------------+
+|step 1 | Start IP connectivity monitors: |
+| | 1. Check the L2 connectivity between the VMs in the same |
+| | Neutron network. |
+| | |
+| | 2. Check connectivity from one VM to an external host on |
+| | the Internet to verify SNAT functionality.
+| | |
+| | Result: The monitor info will be collected. |
+| | |
++--------------+--------------------------------------------------------------+
+|step 2 | Start attacker: |
+| | SSH connect to the VIM node and kill the SDN controller |
+| | process |
+| | |
+| | Result: the SDN controller service will be shutdown |
+| | |
++--------------+--------------------------------------------------------------+
+|step 3 | Verify the results of the IP connectivity monitors. |
+| | |
+| | Result: The outage_time metric reported by the monitors |
+| | is zero. |
+| | |
++--------------+--------------------------------------------------------------+
+|step 4 | Restart the SDN controller. |
+| | |
++--------------+--------------------------------------------------------------+
+|step 5 | Create a new VM in the existing Neutron network |
+| | |
++--------------+--------------------------------------------------------------+
+|step 6 | Verify connectivity between VMs as follows: |
+| | 1. Check the L2 connectivity between the previously |
+| | existing VM and the newly created VM on the same |
+| | Neutron network by sending ICMP messages |
+| | |
++--------------+--------------------------------------------------------------+
+|step 7 | Stop IP connectivity monitors after a period of time |
+| | specified by “waiting_time” |
+| | |
+| | Result: The monitor info will be aggregated |
+| | |
++--------------+--------------------------------------------------------------+
+|step 8 | Verify the IP connectivity monitor results |
+| | |
+| | Result: IP connectivity monitor should not have any packet |
+| | drop failures reported |
+| | |
++--------------+--------------------------------------------------------------+
+|test verdict | This test fails if the SLAs are not met or if there is a |
+| | test case execution problem. The SLAs are define as follows |
+| | for this test: |
+| | * SDN Controller recovery |
+| | * process_recover_time <= 30 sec |
+| | |
+| | * no impact on data plane connectivity during SDN |
+| | controller failure and recovery. |
+| | * packet_drop == 0 |
+| | |
++--------------+--------------------------------------------------------------+
+
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