Maithri - add footprint data for microservices (AI)
Questions regarding Dell Server Team interlock
Maithri - indicated discussions with Brian Doty re: Power Monitoring, RBAC and VLAN management use cases (AI)
Collateral status and review - next steps
Team needs to review materials and provide feedback to authors and rest of team (in Confluence)
Needs to be inclusive of Neighborhood Manager and InfraEnablers, so long as the talk track (textual info that goes with diagrams) explains that some of this technology are concepts being developed and extensions to the original RackHD architecture
Discussion - WFEaaS - standalone workflow engine
There is an on-going effort for removing dependence on on-http
WIP - developing a native HTTP interface for on-taskgraph based on a subset of RackHD 2.0 APIs
Subset includes those used to trigger workflows
Also working on adding support for gRPC to allow for RPC semantics to drive workflows, when HTTP is not needed or required
Dependence on MongoDB
Will be very challenging
Today, an abstraction called a "store" exists which is based on using MongoDB as a persistence backend
Could potentially develop another "store" which leverages a local FS
Problem – "store" is based on MongoDB specific semantics – semantics are not abstracted
Almost all WFE state is stored in MongoDB with the exception of poller state, which is kept in memory
WFE is able to recover any workflow if processes/containers were to crash
Native HTTP and gRPC changes are currently sitting in a feature branch/fork ("modularity")
PR exists, but realized test coverage was not good enough, so working to improve test coverage
Lexington (an OVA) will likely want to consume microservices as JARs, not sure about RackHD (will discuss with server team on 3/31/17)
DHCP/TFTP
Today, tightly coupled to certain workflows (i.e. discovery, inventory, cataloging, OS installs, etc.) that are based on PXE or iPXE
If workflows that are run do not depend on this and also do not depend on having RackHD assign IPs, then DHCP/TFTP can be eliminated from a WFE deployment
Dell PE servers with iDRAC
Workflows can leverage iDRAC virtual media
Current OS deployment microservice mounts virtual media (some sort of NFS/CIFS share with install media)
RackHD would be present to coordinate workflows
Take user promps, create ISOs to on vitual media, take results from steps and feed into subsequent microservice RESTful calls, etc.
If Lex is already able to perform coordination, it is possible they may only want to consume microservice and not RackHD – will discuss on 3/31
Action items
Former user (Deleted) - collect footprint metrics for microservices to have available for next interlock with Dell Server team