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Table of Contents

Meeting Time and Conference information

Meeting Time:  3rd Monday of each month at 1pm EST as needed (if there are no agenda items, the meeting is cancelled)

EdgeX Working Group 2 is inviting you to a scheduled Zoom meeting.

Topic: EdgeX - Monthly Architects Meeting
Time: Nov 30 2020 10:00 AM Pacific Time (US and Canada)
Every month on the Third Mon, until Nov 18, 2024, 50 occurrence(s)

Please download and import the following iCalendar (.ics) files to your calendar system.
Monthly: https://zoom.us/meeting/vpEufuytpzstxwJXp3nHvYoHt7mRqmscaw/ics?icsToken=98tyKuqtrTIvH92Vt1_Hd7MvA5X5buHylmlZgJtNzxHNFRlcShehO9BTP6F8Ec-B

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Meeting ID: 353 955 907
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Meeting Agenda/Minutes

Nov 30, 2020:  Meeting Minutes; Meeting Recording

Sept 21, 2020:  Meeting Minutes; Meeting Recording; Adopter Series Requirements Summary

Aug 20, 2020:  Meeting Minutes; Meeting Recording

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Nov 18: Meeting Minutes; Meeting Recording

Open Topics

  • We need to revisit CBOR binary support vs simple JSON / binary encoding (per Core WG meeting of 1/7/21).
    • High - How to handle binary data in V2
      • Is CBOR still the right way?
      • Simplicity versus performance
      • We should have new requirements/use cases to change this
      • Jim to find the objectors to CBOR before we cover and get any suggestions/requirements for non-CBOR
  • Use of CLI to generate new application or device service
    • Per Core WG and TSC meetings (1/20/21), there is a big desire to add a feature to EdgeX tooling to more easily generate a new device or application service (using a command line tool and some template found in the SDK)
    • Question is whether this should live in edgex-cli or is this a separate tool?
    • CLI for replacing curl scripts; this doesn't see to fall in line with objectives of the current CLI.
  • Client keys in configuration; use the service keys as the constants for the map keys (per Core WG meeting of 1/21/21)
  • We are up to 58 repositories in Holding. May need to look at some cleanup in the new year.
    • Done - resolved via email
  • Core/High - Ensure that service location data is pulled from trusted source (i.e. not Consul) (Tony's ADR)
    • Covered in Security WG
  • High - V2 API - should we add security foundation added to that (per some of earlier V2 API designs via Dell and Bryon N)?
    • Adding token to authenticate a micro service call (is this in scope for Ireland)
    • May not be needed unless all services are distributed
    • We need to explore alternatives to provide secure / locked out service to service communications
  • Med - Address how to get device resource info (for app services and Kuiper)
    • Probably not ADR worthy
    • Either provide Lenny’s convenience APIs or tool to dig out the device resource information in the (cached) profiles
    • How/when to invalidate the cache if we use the profile-digging approach
  • Med - Keep commit history from beginning to end (don’t squash them until PR approved)
  • Med - Standardizing units of measure
  • Med - Declarative Kong applicability
    • Allowing us to drop Progress DB
    • But can you configure groups/users ACL
    • Only supports JWT users
  • Low -
  • Security WG - high priority review of ADR for bootstrapping in OCI containers requested.
    • Architect’s asked to review prior to next Architect’s meeting (Sep 21)
    • Bryon to cover highlights at that meeting
  • Per the Hanoi planning conference - we need to better define "bound checking" so that a design (and eventual implementation) can be brought forth to meet the requirements
    • Currently considering limiting the number of operations that can be performed on a service (like a device service) over a period of time or setting the max request size (that lends to DoS attacks)
    • Can the solution be more globally applied?
  • Is the Wiki the best place to document project decisions (those outside of or smaller than ADRs).  This was our initial take.  Should we revisit?

On Hold Topics or Pending Research

  • How should we apply semantic versioning to modules?  When do we update the minor and major versions of modules?  (comes from the Hanoi planning meetings)
    • Decision was to release (and tag) them with each EdgeX release (major)
    • Enforce backward compatibility within a major release
    • Scope this work for Ireland as it will impact DevOps (Jim to get with Ernesto)
  • How do we review/remove artifact removal (docker images in Docker Hub, snaps, etc.)?
    • Decision made to tag "latest" dot release with X.Y tagging and use X.Y in Docker Compose files (see minutes from 8/20).
    • Open discussion still around what to do with old (very old) images.
      • Let’s check what are other projects doing in this case (Kong, Consul, Vault, …)?
      • Also consult with community and adopters; what do they expect from us? Accenture, ThunderSoft, …

      • Jim to take this research and poll of adopters

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  • Could add scope in order to understand the domain of a PR (especially for edgex-go)
  • Mike and Tony to discuss before next TSC.

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  • Jim to do some research first.  Findings: there are places in DS, Core and Application Services where messages can get out of order.  If order is something that should be an option built in, it will require much work.

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  • Jim to collect and present after all 5 presentations
  • Low (must be done before V2 is done) - Naming scheme changes for config.Clients (key name change)
    • Use consistent name that all other services use for core data
    • Consistency in the naming vs changing all the names to use service name as part of key
    • Related to system management hard coded list of services.
    • Separate issue in arch meeting – high once report back
    • Other naming issues (secret store vs secret service)
    • Opportunity to make all config/naming consistent
    • Jim take resp – get WG leads – try to prioritize this survey
  • Low - Revisit combine core services at least at all executables in one image
    • Release would be easier but image would be bigger with more complex compose files
  • Low - Digital twin (and LWM2M) applicability
  • Low - Time series database support and applicability
    • Ian Johnson has an example of app service to InfuxDB export (snap in the store)


Non-prioritized items

  • Allowing dynamic changes to device profiles

On Hold Topics or Pending Research

None at this time

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