Needs description: 

The background of this project is the end-of-support for several most used run-time by applications that are running on Google App Engine standard first generation. Based on the documentation provided by Google (can be seen here), applications that are running using for example: Java 8, Python 2.7, Python 3.7 among other runtimes, will have end-of-support by the 30th Jan 2024 (the earliest deadline, we still have several other deadlines in 2024 as well).

Following the end-of-support for those runtimes, the impact to applications running in GAE standard first gen. will be:

• Google will no longer apply security updates or patches to components of the runtime environment.
• Your application will continue to run and receive traffic.
• You will no longer be able to create and/or update the application on the unsupported runtime.
• Issues arising from the use of an unsupported runtime will not be eligible for technical support.

Looking at the above points, basically it means also that this will be the end-of-life of GAE standard first gen. because of it's supported runtime will reach end-of-support by the 30th of Jan 2024. For Solvay, Google identified as many as 125 projects (43 applications).

To continue to be able to support those applications, the following actions needs to be taken:

• Identifying the options to keep the affected applications. This step has been done and the direction is to migrate those applications from GAE first gen. to Cloud Run.
• Decommissioning the non used projects/apps (bringing potential OPEX savings) when possible.
• Assessing the efforts required to execute the Cloud Run migration, including different type of actions depending the nature of each applications.
• Defining and building supporting requirements to enable operations to work properly to maintain and support Cloud Run.
• Executing the migration to ensure business continuity.

Added value: this project is also addressing security concerns regarding Google App Engine that has constraints regarding the default exposure to the internet.

Please see here more information for this project.

Budget estimated: the budget will be estimated in the Strategize phase, which will be considered new budget required due to the changes caused by the technology dependency.

• Several App Engine standard environment language runtimes are reaching end-of-support by the 30th January 2024.
• All language runtimes supported by App Engine standard will reach  end-of-support by the 30th January 2024.
• Impact of this changes is critical, which going to disable the capability of supporting/maintaining affected applications.
• Solvay has in total 128 GCP projects affected (using GAE standard first generation) which are representing in total of 45 applications, which most of them will be in critical situation by end of January 2024 unless the actions to replace GAE to Cloud Run is executed.

This list will be adjusted in the Strategize phase but here are some assumptions:

• DT LT members (for arbitration on projects under their platforms responsibility: KEEP or DECOMM)
• S&C Platform: Fadi Bechara, Anja Milenkovic
• H&C Platform: Alexandre Mathe, Mark Reeve 
• Development, Test & Deployment Platform: Alexander Henry Tejasukmana, Darren Ong
• Application Owners
• Vanenburg: for the build and operations work.

Do you think if your initiative is compatible with a waterfall approachor with an agile approach?

• Agile model
• Waterfall model
• I do not know at this stage

EPIC 1: Study and arbitrate 128 projects with each application owner to define Phase 1 & 2 Deliverables

• List of GPC projects with information updated (owner, scope, architecture,...) and decision (keep/kill)
• Presentation for arbitration
• Workload & Cost estimation + Capacity for each project migration
• Planning for Phase 1 & 2

EPIC 2: Quick win actions (decomm projects)

• Project removed
• Documentation updated (Update referential master data, CMDB)

EPIC 3:  Rebuild applications

• New architecture designed (LLD)
• App rebuilt using Cloud Run 

Complete Architecture Impact Analysis (AIA)

ARB & AIA

Alexandre Mathé

Check you have confirmed the involvement of each platform

Complete the security questionnaire in “SIP Support tool”

The questionnaire applied only for EPIC 3 - Vendohm rebuild

W&C: to be filled in to Accolade in preparation phase

TCO over 10Y: 

xxxx - Business Case/Financial evaluation 10Y

- Is the business ambition you will support improving or not sustainability?

no

- Will you increase or decrease the number of hardware we need to operate? How much ?

it will increase the number of GCP services required for Cloud Run usage compared with the number of GCP resources with GAE

- Will you generate or transfer an important amount of data, especially videos? How much?

no