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authorgwaines <greg.waines@windriver.com>2017-03-17 05:29:31 -0400
committergwaines <greg.waines@windriver.com>2017-03-17 06:11:43 -0400
commit26dbdfa73fd376f8bd20011dc93628a945027304 (patch)
tree5d740bd51f63a2d927d2830bf34458cbf617abae /Scenario_Seperate_Sections/images_network_nodes
parente83e826789396a4e1a9cd113976bec6860a3ab9f (diff)
Updating HA GUEST API OVERVIEW DOCUMENT based on Bertrand Souville's comments.
- adding standard Doctor / Vitrage Fault Mgmt Architecture Diagram, and - refering to Doctor SB API ------------- Updating HA GUEST API OVERVIEW Proposal after review with OPNFV DOCTOR Team. Minutes from meeting, that were addressed as part of this update are below. - VM Heartbeating & Health Checking * libvirt watchdog and its integration / use with OpenStack > https://blueprints.launchpad.net/nova/+spec/libvirt-watchdog > https://wiki.openstack.org/wiki/LibvirtWatchdog#Notifications > Need to review behaviour of this capability as compared to the proposed VM Heartbeating/Health-checking > i believe there is a bit of overlap but believe that VM Heartbeating / Health-checking provides a more complete solution > i'll update document with a NOTE on comparing the proposal with the libvirt watchdog * Update the architecture diagram to be consistent with the most current DOCTOR Architecture Diagrams > e.g. Vitrage & Congress are not necessrily deployed at same time > use DOCTOR terminology where applicable, e.g. "inspector modules" > OPNFV DOCTOR includes patches/components of AODH, NOVA, NEUTRON ... not just Vitrage and Congress, as shown in diagram - although also had comment that should remove OPNFV DOCTOR outline from diagram as OPNFV DOCTOR is a reuirement specification and not an implementation > indicate (possibly just in text below diagram) that the "Guest Heartbeat / Health-check Server' on Controller Node is possibly not required, as the Vitrage data source interface can be remotely reached by "Guest Heartbeat / Health-check Compute" on the Compute Node * In text, provide a little more detail on content of actual messaging e.g. PDUs and rough message content * OVERALL > believe there was a general agreement in the way that VM Heartbeating & Health-checking was integrated / inter-worked with OPNFV DOCTOR's Vitrage / Congress and overall OPNFV fault reporting architecture > key feedback was to understand and highlight the additional value of the VM Heartbeating & Health-checking functionality over the existing libvirt watchdog integration into OpenStack. - Server Group Messaging * suggestion that Rabbit MQ pub/sub messaging could be an alternative for routing of messages > this is an implementation detail though * general discussions on "HA use cases" for how this messaging could be leveraged > e.g. split-brain avoidance, faster peer VM state change notifications * OVERALL > agreement that the Server Group Messaging Architecture did NOT conflict with Doctor Architecture > need further review with OPNFV MANO Team as to how they would position this functionality e.g. - position it as an alternative for various HA use cases ? - versus - mandating that this service group messaging be used for specific HA user cases Change-Id: Icd54bbf8889017cfe3f617656ddf483cbb171e63 Signed-off-by: gwaines <greg.waines@windriver.com>
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