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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)

Zoom LinkEdgeX 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

Mar 15, 2021:  Meeting Minutes; Meeting Recording

Feb 16, 2021:  Meeting Minutes; Meeting Recording

Architects Meeting - EdgeX Microservice Authentication.pptx.pdf (Bryon's presentation)

Jan 26, 2021: Meeting Minutes; Meeting Recording

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

  • PR Template for conventional commits is now in place for all repositories for all PRs but without TSC approval.  It doesn’t appear to be affecting any problem. We need to finalize the shape of this and officially approve the template by the TSC.
    • Mike, Lisa and Tony to provide improved template around conventional commits and any recommended policy for TSC approval.  Meeting still forthcoming.
    • Mike testing with app services
    • 2 different bots (conventional commit bot, Dependa bot – its own thing, not related to conventional commits issue)
  • Design metadata about the “gateway” or host platform (identity, location, …)
    • Being worked in core WG
    • Need some identifier in Event/Reading
    • Need a unique id for each EdgeX instance
      • New field “Tags” added to Event/Reading
      • Any service could add to that “Tags”
      • Optionally – make available a UUID through Metadata
      • Is there an industry standard – can we align to any existing standard (Jim to research)
      • Tags == Labels
        • Not key-value pair
        • Should be array of k/v (Maps) or JSON object
      • Tag to just to event (not needed to readings)
    • ADR to be created after research
    • Which issue to tackle this in - TBD
  • High priority review of ADR for bootstrapping in OCI containers requested.
  • How do we review/remove artifact removal (docker images in Docker Hub, snaps, etc.)?
    • New Docker policy will remove any image that is not pulled or pushed in 6 months.
  • Extract of Device Service requirements to ADR legacy - what are all the pieces that need to be moved there?
  • 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)
  • 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?
  • How do address module and component version release needs for examples (per Slack exchange with Luis Obando).  go.mod in the examples helps - or at least some documentation on dependencies.
  • Is order of event/readings being sent by a single device service important?  Are there async operations in any service that could change the order of events as they are sent from a DS to core to application services (with REST, 0MQ or MQTT infrastructure)?  What do customers desire here?  Is maintained order important?  What is the current state of the system and can we diagram/document that? 
    • 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.
  • Incorporation of Vertical Solution WG adopter presentation feedback
    • Jim to collect and present after all 5 presentations
  • EdgeX UI - it is for dev/test right now.  Would we ever want to have a UI for production?  Under what constraints?Being worked through Core WGMed - Standardizing units of measure
    • Per meeting of 3/15, Jim to research more like the ANSI X-12 standard and see what other IoT/edge projects are using.
  • Med - Declarative Kong applicability
    • Allowing us to drop Progress DB
    • But can you configure groups/users ACL
    • Only supports JWT users
  • Med - what's the future state of system management service(s) look like
    • How to deal with dynamically adding/removing services
    • Does it reside in registry/configuration service
    • How to handle security issues
  • Low - 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?
  • 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
    • Per Core WG of 2/18/21 - is it at least worth exploring the combination of Core Metadata and Core Command since the two have to share so much data?
    • Core command is just a proxy service today, but reasons for having a separate service include: additional security to protect actuation; issue multiple device commands with one request (make one request and fire it to all Modbus devices or all devices under the control of one service); provide the means to limit requests down to a device so as not to overwhelm it or wake it up).  These needs could also be incorporated into a combined metadata service but there are advantages to separation of concerns.
  • Low - Digital twin (and LWM2M) applicability - being worked via liaison with DTC
  • Low - Time series database support and applicability
    • Ian Johnson has an example of app service to InfuxDB export (snap in the store)
  • Low - where should tool/script for creating new device and application services be placed?
    • After the architect's meeting of Jan 26, 2021, it was decided that "templates" should be created in all SDKs to allow for the easy creation of new services (removing the old samples in the SDKs).  The templates will be a means for users to copy and create a new service with some instruction on how to rename and replace TODOs with necessary code.
    • After the templates are in place, there is a decision to be made about where automation can be placed to use the templates to create new services (versus a manual copy).  In the CLI, in a new tool, in a set of simple scripts?

On Hold Topics or Pending Research

  • 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
    • ADR being created and to be reviewed in the Security WG.