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diff --git a/docs/release/scenarios/fault_management/fault_management.rst b/docs/release/scenarios/fault_management/fault_management.rst new file mode 100644 index 00000000..99371201 --- /dev/null +++ b/docs/release/scenarios/fault_management/fault_management.rst @@ -0,0 +1,90 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 + + +Running test cases +"""""""""""""""""" + +Functest will call the "doctor_tests/main.py" in Doctor to run the test job. +Doctor testing can also be triggered by tox on OPNFV installer jumphost. Tox +is normally used for functional, module and coding style testing in Python +project. + +Currently 'MCP' and 'devstack' installer are supported. + + +Fault management use case +""""""""""""""""""""""""" + +* A consumer of the NFVI wants to receive immediate notifications about faults + in the NFVI affecting the proper functioning of the virtual resources. + Therefore, such faults have to be detected as quickly as possible, and, when + a critical error is observed, the affected consumer is immediately informed + about the fault and can switch over to the STBY configuration. + +The faults to be monitored (and at which detection rate) will be configured by +the consumer. Once a fault is detected, the Inspector in the Doctor +architecture will check the resource map maintained by the Controller, to find +out which virtual resources are affected and then update the resources state. +The Notifier will receive the failure event requests sent from the Controller, +and notify the consumer(s) of the affected resources according to the alarm +configuration. + +Detailed workflow information is as follows: + +* Consumer(VNFM): (step 0) creates resources (network, server/instance) and an + event alarm on state down notification of that server/instance or Neutron + port. + +* Monitor: (step 1) periodically checks nodes, such as ping from/to each + dplane nic to/from gw of node, (step 2) once it fails to send out event + with "raw" fault event information to Inspector + +* Inspector: when it receives an event, it will (step 3) mark the host down + ("mark-host-down"), (step 4) map the PM to VM, and change the VM status to + down. In network failure case, also Neutron port is changed to down. + +* Controller: (step 5) sends out instance update event to Ceilometer. In network + failure case, also Neutron port is changed to down and corresponding event is + sent to Ceilometer. + +* Notifier: (step 6) Ceilometer transforms and passes the events to AODH, + (step 7) AODH will evaluate events with the registered alarm definitions, + then (step 8) it will fire the alarm to the "consumer" who owns the + instance + +* Consumer(VNFM): (step 9) receives the event and (step 10) recreates a new + instance + +Fault management test case +"""""""""""""""""""""""""" + +Functest will call the 'doctor-test' command in Doctor to run the test job. + +The following steps are executed: + +Firstly, get the installer ip according to the installer type. Then ssh to +the installer node to get the private key for accessing to the cloud. As +'fuel' installer, ssh to the controller node to modify nova and ceilometer +configurations. + +Secondly, prepare image for booting VM, then create a test project and test +user (both default to doctor) for the Doctor tests. + +Thirdly, boot a VM under the doctor project and check the VM status to verify +that the VM is launched completely. Then get the compute host info where the VM +is launched to verify connectivity to the target compute host. Get the consumer +ip according to the route to compute ip and create an alarm event in Ceilometer +using the consumer ip. + +Fourthly, the Doctor components are started, and, based on the above preparation, +a failure is injected to the system, i.e. the network of compute host is +disabled for 3 minutes. To ensure the host is down, the status of the host +will be checked. + +Finally, the notification time, i.e. the time between the execution of step 2 +(Monitor detects failure) and step 9 (Consumer receives failure notification) +is calculated. + +According to the Doctor requirements, the Doctor test is successful if the +notification time is below 1 second. |