[openstack-dev] [vitrage] [nova] VM Heartbeat / Healthcheck Monitoring
Greg.Waines at windriver.com
Tue May 9 17:11:14 UTC 2017
I am looking for guidance on where to propose some “VM Heartbeat / Health-check Monitoring” functionality that I would like to contribute to openstack.
Briefly, “VM Heartbeat / Health-check Monitoring”
· is optionally enabled thru a Nova flavor extra-spec,
· is a service that runs on an OpenStack Compute Node,
· it sends periodic Heartbeat / Health-check Challenge Requests to a VM
over a virtio-serial-device setup between the Compute Node and the VM thru QEMU,
· on loss of heartbeat or a failed health check status will result in fault event, against the VM, being
reported to Vitrage thru its data-source API.
Where should I contribute this functionality ?
· put it ALL in Vitrage ... both the monitoring and the data-source reporting ?
· put the monitoring in Nova, and just the data source reporting in Vitrage ?
· other ?
p.s. other info ...
Benefits of “VM Heartbeat / Health-check Monitoring”
· monitors health of OS and Applications INSIDE the VM
o i.e. even just a simple Ack of the Heartbeat would validate that the OS is running, IO mechanisms (sockets, etc)
are working and processes are getting scheduled
· health-check status reporting can trigger and report on either high-level or detailed application-specific audits within the VM,
· the simple virtio-serial-device interface thru QEMU is UP very early in VM life cycle and is virtually always up
o i.e. its available for reporting issues virtually all the time,
o ... compared to reporting issues over Tenant Network to a remote VNFManager which relies on Ethernet and IP Networking within the VM itself and then any provider network and adjacent routers around the compute nodes ...
· uses a simple “Line-Delimited JSON” Format over virtio serial device ( http://www.linux-kvm.org/page/Virtio-serial_API )
o simple to implement protocol inside VM, in pretty much any language
o ( although would provide reference implementation )
· provides more thorough instance monitoring than libvirt’s emulated hardware watchdog ( https://libvirt.org/formatdomain.html#elementsWatchdog )
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the OpenStack-dev